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package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.ConfigurableListableBeanFactory;
import cn.bugstack.springframework.beans.factory.config.BeanFactoryPostProcessor;
import cn.bugstack.springframework.beans.factory.config.BeanPostProcessor;
import cn.bugstack.springframework.context.ApplicationEvent;
import cn.bugstack.springframework.context.ApplicationListener;
import cn.bugstack.springframework.context.ConfigurableApplicationContext;
import cn.bugstack.springframework.context.event.ApplicationEventMulticaster;
import cn.bugstack.springframework.context.event.ContextClosedEvent;
import cn.bugstack.springframework.context.event.ContextRefreshedEvent;
import cn.bugstack.springframework.context.event.SimpleApplicationEventMulticaster;
import cn.bugstack.springframework.core.io.DefaultResourceLoader;
import java.util.Collection;
import java.util.Map;
/**
* Abstract implementation of the {@link cn.bugstack.springframework.context.ApplicationContext}
* interface. Doesn't mandate the type of storage used for configuration; simply
* implements common context functionality. Uses the Template Method design pattern,
* requiring concrete subclasses to implement abstract methods.
* <p>
* 抽象应用上下文
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class AbstractApplicationContext extends DefaultResourceLoader implements ConfigurableApplicationContext {
public static final String APPLICATION_EVENT_MULTICASTER_BEAN_NAME = "applicationEventMulticaster";
private ApplicationEventMulticaster applicationEventMulticaster;
@Override
public void refresh() throws BeansException {
// 1. 创建 BeanFactory，并加载 BeanDefinition
refreshBeanFactory();
// 2. 获取 BeanFactory
ConfigurableListableBeanFactory beanFactory = getBeanFactory();
// 3. 添加 ApplicationContextAwareProcessor，让继承自 ApplicationContextAware 的 Bean 对象都能感知所属的 ApplicationContext
beanFactory.addBeanPostProcessor(new ApplicationContextAwareProcessor(this));
// 4. 在 Bean 实例化之前，执行 BeanFactoryPostProcessor (Invoke factory processors registered as beans in the context.)
invokeBeanFactoryPostProcessors(beanFactory);
// 5. BeanPostProcessor 需要提前于其他 Bean 对象实例化之前执行注册操作
registerBeanPostProcessors(beanFactory);
// 6. 初始化事件发布者
initApplicationEventMulticaster();
// 7. 注册事件监听器
registerListeners();
// 8. 提前实例化单例Bean对象
beanFactory.preInstantiateSingletons();
// 9. 发布容器刷新完成事件
finishRefresh();
}
protected abstract void refreshBeanFactory() throws BeansException;
protected abstract ConfigurableListableBeanFactory getBeanFactory();
private void invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory beanFactory) {
Map<String, BeanFactoryPostProcessor> beanFactoryPostProcessorMap = beanFactory.getBeansOfType(BeanFactoryPostProcessor.class);
for (BeanFactoryPostProcessor beanFactoryPostProcessor : beanFactoryPostProcessorMap.values()) {
beanFactoryPostProcessor.postProcessBeanFactory(beanFactory);
}
}
private void registerBeanPostProcessors(ConfigurableListableBeanFactory beanFactory) {
Map<String, BeanPostProcessor> beanPostProcessorMap = beanFactory.getBeansOfType(BeanPostProcessor.class);
for (BeanPostProcessor beanPostProcessor : beanPostProcessorMap.values()) {
beanFactory.addBeanPostProcessor(beanPostProcessor);
}
}
private void initApplicationEventMulticaster() {
ConfigurableListableBeanFactory beanFactory = getBeanFactory();
applicationEventMulticaster = new SimpleApplicationEventMulticaster(beanFactory);
beanFactory.registerSingleton(APPLICATION_EVENT_MULTICASTER_BEAN_NAME, applicationEventMulticaster);
}
private void registerListeners() {
Collection<ApplicationListener> applicationListeners = getBeansOfType(ApplicationListener.class).values();
for (ApplicationListener listener : applicationListeners) {
applicationEventMulticaster.addApplicationListener(listener);
}
}
private void finishRefresh() {
publishEvent(new ContextRefreshedEvent(this));
}
@Override
public void publishEvent(ApplicationEvent event) {
applicationEventMulticaster.multicastEvent(event);
}
@Override
public <T> Map<String, T> getBeansOfType(Class<T> type) throws BeansException {
return getBeanFactory().getBeansOfType(type);
}
@Override
public String[] getBeanDefinitionNames() {
return getBeanFactory().getBeanDefinitionNames();
}
@Override
public Object getBean(String name) throws BeansException {
return getBeanFactory().getBean(name);
}
@Override
public Object getBean(String name, Object... args) throws BeansException {
return getBeanFactory().getBean(name, args);
}
@Override
public <T> T getBean(String name, Class<T> requiredType) throws BeansException {
return getBeanFactory().getBean(name, requiredType);
}
@Override
public <T> T getBean(Class<T> requiredType) throws BeansException {
return getBeanFactory().getBean(requiredType);
}
@Override
public void registerShutdownHook() {
Runtime.getRuntime().addShutdownHook(new Thread(this::close));
}
@Override
public void close() {
// 发布容器关闭事件
publishEvent(new ContextClosedEvent(this));
// 执行销毁单例bean的销毁方法
getBeanFactory().destroySingletons();
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/context/support/AbstractApplicationContext.java
|
Java
|
apache-2.0
| 5,953
|
package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.ConfigurableListableBeanFactory;
import cn.bugstack.springframework.beans.factory.support.DefaultListableBeanFactory;
/**
* Base class for {@link cn.bugstack.springframework.context.ApplicationContext}
* implementations which are supposed to support multiple calls to {@link #refresh()},
* creating a new internal bean factory instance every time.
* Typically (but not necessarily), such a context will be driven by
* a set of config locations to load bean definitions from.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class AbstractRefreshableApplicationContext extends AbstractApplicationContext {
private DefaultListableBeanFactory beanFactory;
@Override
protected void refreshBeanFactory() throws BeansException {
DefaultListableBeanFactory beanFactory = createBeanFactory();
loadBeanDefinitions(beanFactory);
this.beanFactory = beanFactory;
}
private DefaultListableBeanFactory createBeanFactory() {
return new DefaultListableBeanFactory();
}
protected abstract void loadBeanDefinitions(DefaultListableBeanFactory beanFactory);
@Override
protected ConfigurableListableBeanFactory getBeanFactory() {
return beanFactory;
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/context/support/AbstractRefreshableApplicationContext.java
|
Java
|
apache-2.0
| 1,435
|
package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.factory.support.DefaultListableBeanFactory;
import cn.bugstack.springframework.beans.factory.xml.XmlBeanDefinitionReader;
/**
* Convenient base class for {@link cn.bugstack.springframework.context.ApplicationContext}
* implementations, drawing configuration from XML documents containing bean definitions
* understood by an {@link cn.bugstack.springframework.beans.factory.xml.XmlBeanDefinitionReader}.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class AbstractXmlApplicationContext extends AbstractRefreshableApplicationContext {
@Override
protected void loadBeanDefinitions(DefaultListableBeanFactory beanFactory) {
XmlBeanDefinitionReader beanDefinitionReader = new XmlBeanDefinitionReader(beanFactory, this);
String[] configLocations = getConfigLocations();
if (null != configLocations){
beanDefinitionReader.loadBeanDefinitions(configLocations);
}
}
protected abstract String[] getConfigLocations();
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/context/support/AbstractXmlApplicationContext.java
|
Java
|
apache-2.0
| 1,124
|
package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.config.BeanPostProcessor;
import cn.bugstack.springframework.context.ApplicationContext;
import cn.bugstack.springframework.context.ApplicationContextAware;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ApplicationContextAwareProcessor implements BeanPostProcessor {
private final ApplicationContext applicationContext;
public ApplicationContextAwareProcessor(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
if (bean instanceof ApplicationContextAware){
((ApplicationContextAware) bean).setApplicationContext(applicationContext);
}
return bean;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
return bean;
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/context/support/ApplicationContextAwareProcessor.java
|
Java
|
apache-2.0
| 1,114
|
package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.BeansException;
/**
* Standalone XML application context, taking the context definition files
* from the class path, interpreting plain paths as class path resource names
* that include the package path (e.g. "mypackage/myresource.txt"). Useful for
* test harnesses as well as for application contexts embedded within JARs.
* <p>
* XML 文件应用上下文
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ClassPathXmlApplicationContext extends AbstractXmlApplicationContext {
private String[] configLocations;
public ClassPathXmlApplicationContext() {
}
/**
* 从 XML 中加载 BeanDefinition，并刷新上下文
*
* @param configLocations
* @throws BeansException
*/
public ClassPathXmlApplicationContext(String configLocations) throws BeansException {
this(new String[]{configLocations});
}
/**
* 从 XML 中加载 BeanDefinition，并刷新上下文
* @param configLocations
* @throws BeansException
*/
public ClassPathXmlApplicationContext(String[] configLocations) throws BeansException {
this.configLocations = configLocations;
refresh();
}
@Override
protected String[] getConfigLocations() {
return configLocations;
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/context/support/ClassPathXmlApplicationContext.java
|
Java
|
apache-2.0
| 1,414
|
package cn.bugstack.springframework.core.io;
import cn.bugstack.springframework.util.ClassUtils;
import cn.hutool.core.lang.Assert;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
public class ClassPathResource implements Resource {
private final String path;
private ClassLoader classLoader;
public ClassPathResource(String path) {
this(path, (ClassLoader) null);
}
public ClassPathResource(String path, ClassLoader classLoader) {
Assert.notNull(path, "Path must not be null");
this.path = path;
this.classLoader = (classLoader != null ? classLoader : ClassUtils.getDefaultClassLoader());
}
@Override
public InputStream getInputStream() throws IOException {
InputStream is = classLoader.getResourceAsStream(path);
if (is == null) {
throw new FileNotFoundException(
this.path + " cannot be opened because it does not exist");
}
return is;
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/core/io/ClassPathResource.java
|
Java
|
apache-2.0
| 1,029
|
package cn.bugstack.springframework.core.io;
import cn.hutool.core.lang.Assert;
import java.net.MalformedURLException;
import java.net.URL;
public class DefaultResourceLoader implements ResourceLoader {
@Override
public Resource getResource(String location) {
Assert.notNull(location, "Location must not be null");
if (location.startsWith(CLASSPATH_URL_PREFIX)) {
return new ClassPathResource(location.substring(CLASSPATH_URL_PREFIX.length()));
}
else {
try {
URL url = new URL(location);
return new UrlResource(url);
} catch (MalformedURLException e) {
return new FileSystemResource(location);
}
}
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/core/io/DefaultResourceLoader.java
|
Java
|
apache-2.0
| 756
|
package cn.bugstack.springframework.core.io;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
public class FileSystemResource implements Resource {
private final File file;
private final String path;
public FileSystemResource(File file) {
this.file = file;
this.path = file.getPath();
}
public FileSystemResource(String path) {
this.file = new File(path);
this.path = path;
}
@Override
public InputStream getInputStream() throws IOException {
return new FileInputStream(this.file);
}
public final String getPath() {
return this.path;
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/core/io/FileSystemResource.java
|
Java
|
apache-2.0
| 699
|
package cn.bugstack.springframework.core.io;
import java.io.IOException;
import java.io.InputStream;
public interface Resource {
InputStream getInputStream() throws IOException;
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/core/io/Resource.java
|
Java
|
apache-2.0
| 188
|
package cn.bugstack.springframework.core.io;
public interface ResourceLoader {
/**
* Pseudo URL prefix for loading from the class path: "classpath:"
*/
String CLASSPATH_URL_PREFIX = "classpath:";
Resource getResource(String location);
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/core/io/ResourceLoader.java
|
Java
|
apache-2.0
| 263
|
package cn.bugstack.springframework.core.io;
import cn.hutool.core.lang.Assert;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
public class UrlResource implements Resource{
private final URL url;
public UrlResource(URL url) {
Assert.notNull(url,"URL must not be null");
this.url = url;
}
@Override
public InputStream getInputStream() throws IOException {
URLConnection con = this.url.openConnection();
try {
return con.getInputStream();
}
catch (IOException ex){
if (con instanceof HttpURLConnection){
((HttpURLConnection) con).disconnect();
}
throw ex;
}
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/core/io/UrlResource.java
|
Java
|
apache-2.0
| 807
|
package cn.bugstack.springframework.stereotype;
import java.lang.annotation.*;
/**
* Indicates that an annotated class is a "component".
* Such classes are considered as candidates for auto-detection
* when using annotation-based configuration and classpath scanning.
*/
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Component {
String value() default "";
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/stereotype/Component.java
|
Java
|
apache-2.0
| 416
|
package cn.bugstack.springframework.util;
import java.lang.annotation.Annotation;
import java.util.Set;
public class ClassUtils {
public static ClassLoader getDefaultClassLoader() {
ClassLoader cl = null;
try {
cl = Thread.currentThread().getContextClassLoader();
}
catch (Throwable ex) {
// Cannot access thread context ClassLoader - falling back to system class loader...
}
if (cl == null) {
// No thread context class loader -> use class loader of this class.
cl = ClassUtils.class.getClassLoader();
}
return cl;
}
/**
* Check whether the specified class is a CGLIB-generated class.
* @param clazz the class to check
*/
public static boolean isCglibProxyClass(Class<?> clazz) {
return (clazz != null && isCglibProxyClassName(clazz.getName()));
}
/**
* Check whether the specified class name is a CGLIB-generated class.
* @param className the class name to check
*/
public static boolean isCglibProxyClassName(String className) {
return (className != null && className.contains("$$"));
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/util/ClassUtils.java
|
Java
|
apache-2.0
| 1,188
|
package cn.bugstack.springframework.util;
/**
* Simple strategy interface for resolving a String value.
* Used by {@link cn.bugstack.springframework.beans.factory.config.ConfigurableBeanFactory}.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface StringValueResolver {
String resolveStringValue(String strVal);
}
|
2302_77879529/spring
|
small-spring-step-16/src/main/java/cn/bugstack/springframework/util/StringValueResolver.java
|
Java
|
apache-2.0
| 375
|
package cn.bugstack.springframework.test.bean;
public class Husband {
private Wife wife;
public String queryWife(){
return "Husband.wife";
}
public Wife getWife() {
return wife;
}
public void setWife(Wife wife) {
this.wife = wife;
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/test/java/cn/bugstack/springframework/test/bean/Husband.java
|
Java
|
apache-2.0
| 293
|
package cn.bugstack.springframework.test.bean;
import cn.bugstack.springframework.beans.factory.FactoryBean;
import java.lang.reflect.Proxy;
/**
* 代理类
*/
public class HusbandMother implements FactoryBean<IMother> {
@Override
public IMother getObject() throws Exception {
return (IMother) Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(), new Class[]{IMother.class}, (proxy, method, args) -> "婚后媳妇妈妈的职责被婆婆代理了！" + method.getName());
}
@Override
public Class<?> getObjectType() {
return IMother.class;
}
@Override
public boolean isSingleton() {
return true;
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/test/java/cn/bugstack/springframework/test/bean/HusbandMother.java
|
Java
|
apache-2.0
| 687
|
package cn.bugstack.springframework.test.bean;
public interface IMother {
String callMother();
}
|
2302_77879529/spring
|
small-spring-step-16/src/test/java/cn/bugstack/springframework/test/bean/IMother.java
|
Java
|
apache-2.0
| 104
|
package cn.bugstack.springframework.test.bean;
import cn.bugstack.springframework.aop.MethodBeforeAdvice;
import java.lang.reflect.Method;
public class SpouseAdvice implements MethodBeforeAdvice {
@Override
public void before(Method method, Object[] args, Object target) throws Throwable {
System.out.println("关怀小两口(切面)：" + method);
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/test/java/cn/bugstack/springframework/test/bean/SpouseAdvice.java
|
Java
|
apache-2.0
| 378
|
package cn.bugstack.springframework.test.bean;
public class Wife {
private Husband husband;
private IMother mother; // 婆婆
public String queryHusband() {
return "Wife.husband、Mother.callMother：" + mother.callMother();
}
public Husband getHusband() {
return husband;
}
public void setHusband(Husband husband) {
this.husband = husband;
}
public IMother getMother() {
return mother;
}
public void setMother(IMother mother) {
this.mother = mother;
}
}
|
2302_77879529/spring
|
small-spring-step-16/src/test/java/cn/bugstack/springframework/test/bean/Wife.java
|
Java
|
apache-2.0
| 551
|
package cn.bugstack.springframework.aop;
import org.aopalliance.intercept.MethodInterceptor;
/**
* Base class for AOP proxy configuration managers.
* These are not themselves AOP proxies, but subclasses of this class are
* normally factories from which AOP proxy instances are obtained directly.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class AdvisedSupport {
// ProxyConfig
private boolean proxyTargetClass = false;
// 被代理的目标对象
private TargetSource targetSource;
// 方法拦截器
private MethodInterceptor methodInterceptor;
// 方法匹配器(检查目标方法是否符合通知条件)
private MethodMatcher methodMatcher;
public boolean isProxyTargetClass() {
return proxyTargetClass;
}
public void setProxyTargetClass(boolean proxyTargetClass) {
this.proxyTargetClass = proxyTargetClass;
}
public TargetSource getTargetSource() {
return targetSource;
}
public void setTargetSource(TargetSource targetSource) {
this.targetSource = targetSource;
}
public MethodInterceptor getMethodInterceptor() {
return methodInterceptor;
}
public void setMethodInterceptor(MethodInterceptor methodInterceptor) {
this.methodInterceptor = methodInterceptor;
}
public MethodMatcher getMethodMatcher() {
return methodMatcher;
}
public void setMethodMatcher(MethodMatcher methodMatcher) {
this.methodMatcher = methodMatcher;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/AdvisedSupport.java
|
Java
|
apache-2.0
| 1,559
|
package cn.bugstack.springframework.aop;
import org.aopalliance.aop.Advice;
/**
* Base interface holding AOP <b>advice</b> (action to take at a joinpoint)
* and a filter determining the applicability of the advice (such as
* a pointcut). <i>This interface is not for use by Spring users, but to
* allow for commonality in support for different types of advice.</i>
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface Advisor {
/**
* Return the advice part of this aspect. An advice may be an
* interceptor, a before advice, a throws advice, etc.
* @return the advice that should apply if the pointcut matches
* @see org.aopalliance.intercept.MethodInterceptor
* @see BeforeAdvice
*/
Advice getAdvice();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/Advisor.java
|
Java
|
apache-2.0
| 799
|
package cn.bugstack.springframework.aop;
import org.aopalliance.aop.Advice;
/**
* Common marker interface for before advice, such as {@link MethodBeforeAdvice}.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface BeforeAdvice extends Advice {
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/BeforeAdvice.java
|
Java
|
apache-2.0
| 297
|
package cn.bugstack.springframework.aop;
/**
* Filter that restricts matching of a pointcut or introduction to
* a given set of target classes.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ClassFilter {
/**
* Should the pointcut apply to the given interface or target class?
* @param clazz the candidate target class
* @return whether the advice should apply to the given target class
*/
boolean matches(Class<?> clazz);
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/ClassFilter.java
|
Java
|
apache-2.0
| 511
|
package cn.bugstack.springframework.aop;
import java.lang.reflect.Method;
/**
* Advice invoked before a method is invoked. Such advices cannot
* prevent the method call proceeding, unless they throw a Throwable.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface MethodBeforeAdvice extends BeforeAdvice {
/**
* Callback before a given method is invoked.
*
* @param method method being invoked
* @param args arguments to the method
* @param target target of the method invocation. May be <code>null</code>.
* @throws Throwable if this object wishes to abort the call.
* Any exception thrown will be returned to the caller if it's
* allowed by the method signature. Otherwise the exception
* will be wrapped as a runtime exception.
*/
void before(Method method, Object[] args, Object target) throws Throwable;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/MethodBeforeAdvice.java
|
Java
|
apache-2.0
| 983
|
package cn.bugstack.springframework.aop;
import java.lang.reflect.Method;
/**
* Part of a {@link Pointcut}: Checks whether the target method is eligible for advice.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface MethodMatcher {
/**
* Perform static checking whether the given method matches. If this
* @return whether or not this method matches statically
*/
boolean matches(Method method, Class<?> targetClass);
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/MethodMatcher.java
|
Java
|
apache-2.0
| 500
|
package cn.bugstack.springframework.aop;
/**
* Core Spring pointcut abstraction.
*
* <p>A pointcut is composed of a {@link ClassFilter} and a {@link MethodMatcher}.
* Both these basic terms and a Pointcut itself can be combined to build up combinations
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface Pointcut {
/**
* Return the ClassFilter for this pointcut.
*
* @return the ClassFilter (never <code>null</code>)
*/
ClassFilter getClassFilter();
/**
* Return the MethodMatcher for this pointcut.
*
* @return the MethodMatcher (never <code>null</code>)
*/
MethodMatcher getMethodMatcher();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/Pointcut.java
|
Java
|
apache-2.0
| 712
|
package cn.bugstack.springframework.aop;
/**
* Superinterface for all Advisors that are driven by a pointcut.
* This covers nearly all advisors except introduction advisors,
* for which method-level matching doesn't apply.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface PointcutAdvisor extends Advisor {
/**
* Get the Pointcut that drives this advisor.
*/
Pointcut getPointcut();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/PointcutAdvisor.java
|
Java
|
apache-2.0
| 459
|
package cn.bugstack.springframework.aop;
import cn.bugstack.springframework.util.ClassUtils;
/**
* A <code>TargetSource</code> is used to obtain the current "target" of
* an AOP invocation, which will be invoked via reflection if no around
* advice chooses to end the interceptor chain itself.
* <p>
* 被代理的目标对象
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class TargetSource {
private final Object target;
public TargetSource(Object target) {
this.target = target;
}
/**
* Return the type of targets returned by this {@link TargetSource}.
* <p>Can return <code>null</code>, although certain usages of a
* <code>TargetSource</code> might just work with a predetermined
* target class.
*
* @return the type of targets returned by this {@link TargetSource}
*/
public Class<?>[] getTargetClass() {
Class<?> clazz = this.target.getClass();
clazz = ClassUtils.isCglibProxyClass(clazz) ? clazz.getSuperclass() : clazz;
return clazz.getInterfaces();
}
/**
* Return a target instance. Invoked immediately before the
* AOP framework calls the "target" of an AOP method invocation.
*
* @return the target object, which contains the joinpoint
* @throws Exception if the target object can't be resolved
*/
public Object getTarget() {
return this.target;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/TargetSource.java
|
Java
|
apache-2.0
| 1,463
|
package cn.bugstack.springframework.aop.aspectj;
import cn.bugstack.springframework.aop.ClassFilter;
import cn.bugstack.springframework.aop.MethodMatcher;
import cn.bugstack.springframework.aop.Pointcut;
import org.aspectj.weaver.tools.PointcutExpression;
import org.aspectj.weaver.tools.PointcutParser;
import org.aspectj.weaver.tools.PointcutPrimitive;
import java.lang.reflect.Method;
import java.util.HashSet;
import java.util.Set;
/**
* Spring {@link cn.bugstack.springframework.aop.Pointcut} implementation
* that uses the AspectJ weaver to evaluate a pointcut expression.
* <p>
* 切点表达式
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class AspectJExpressionPointcut implements Pointcut, ClassFilter, MethodMatcher {
private static final Set<PointcutPrimitive> SUPPORTED_PRIMITIVES = new HashSet<PointcutPrimitive>();
static {
SUPPORTED_PRIMITIVES.add(PointcutPrimitive.EXECUTION);
}
private final PointcutExpression pointcutExpression;
public AspectJExpressionPointcut(String expression) {
PointcutParser pointcutParser = PointcutParser.getPointcutParserSupportingSpecifiedPrimitivesAndUsingSpecifiedClassLoaderForResolution(SUPPORTED_PRIMITIVES, this.getClass().getClassLoader());
pointcutExpression = pointcutParser.parsePointcutExpression(expression);
}
@Override
public boolean matches(Class<?> clazz) {
return pointcutExpression.couldMatchJoinPointsInType(clazz);
}
@Override
public boolean matches(Method method, Class<?> targetClass) {
return pointcutExpression.matchesMethodExecution(method).alwaysMatches();
}
@Override
public ClassFilter getClassFilter() {
return this;
}
@Override
public MethodMatcher getMethodMatcher() {
return this;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/aspectj/AspectJExpressionPointcut.java
|
Java
|
apache-2.0
| 1,858
|
package cn.bugstack.springframework.aop.aspectj;
import cn.bugstack.springframework.aop.Pointcut;
import cn.bugstack.springframework.aop.PointcutAdvisor;
import org.aopalliance.aop.Advice;
/**
* Spring AOP Advisor that can be used for any AspectJ pointcut expression.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class AspectJExpressionPointcutAdvisor implements PointcutAdvisor {
// 切面
private AspectJExpressionPointcut pointcut;
// 具体的拦截方法
private Advice advice;
// 表达式
private String expression;
public void setExpression(String expression){
this.expression = expression;
}
@Override
public Pointcut getPointcut() {
if (null == pointcut) {
pointcut = new AspectJExpressionPointcut(expression);
}
return pointcut;
}
@Override
public Advice getAdvice() {
return advice;
}
public void setAdvice(Advice advice){
this.advice = advice;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/aspectj/AspectJExpressionPointcutAdvisor.java
|
Java
|
apache-2.0
| 1,039
|
package cn.bugstack.springframework.aop.framework;
/**
* Delegate interface for a configured AOP proxy, allowing for the creation
* of actual proxy objects.
*
* <p>Out-of-the-box implementations are available for JDK dynamic proxies
* and for CGLIB proxies, as applied by DefaultAopProxyFactory
*
* AOP 代理的抽象
*
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface AopProxy {
Object getProxy();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/framework/AopProxy.java
|
Java
|
apache-2.0
| 472
|
package cn.bugstack.springframework.aop.framework;
import cn.bugstack.springframework.aop.AdvisedSupport;
import cn.bugstack.springframework.util.ClassUtils;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;
import java.lang.reflect.Method;
/**
* CGLIB2-based {@link AopProxy} implementation for the Spring AOP framework.
*
* <p><i>Requires CGLIB 2.1+ on the classpath.</i>.
* As of Spring 2.0, earlier CGLIB versions are not supported anymore.
*
* <p>Objects of this type should be obtained through proxy factories,
* configured by an AdvisedSupport object. This class is internal
* to Spring's AOP framework and need not be used directly by client code.
*/
public class Cglib2AopProxy implements AopProxy {
private final AdvisedSupport advised;
public Cglib2AopProxy(AdvisedSupport advised) {
this.advised = advised;
}
@Override
public Object getProxy() {
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(ClassUtils.getActualClass(advised.getTargetSource().getTarget().getClass()));
enhancer.setInterfaces(advised.getTargetSource().getTargetClass());
enhancer.setCallback(new DynamicAdvisedInterceptor(advised));
return enhancer.create();
}
private static class DynamicAdvisedInterceptor implements MethodInterceptor {
private final AdvisedSupport advised;
public DynamicAdvisedInterceptor(AdvisedSupport advised) {
this.advised = advised;
}
@Override
public Object intercept(Object o, Method method, Object[] objects, MethodProxy methodProxy) throws Throwable {
CglibMethodInvocation methodInvocation = new CglibMethodInvocation(advised.getTargetSource().getTarget(), method, objects, methodProxy);
if (advised.getMethodMatcher().matches(method, advised.getTargetSource().getTarget().getClass())) {
return advised.getMethodInterceptor().invoke(methodInvocation);
}
return methodInvocation.proceed();
}
}
private static class CglibMethodInvocation extends ReflectiveMethodInvocation {
private final MethodProxy methodProxy;
public CglibMethodInvocation(Object target, Method method, Object[] arguments, MethodProxy methodProxy) {
super(target, method, arguments);
this.methodProxy = methodProxy;
}
@Override
public Object proceed() throws Throwable {
return this.methodProxy.invoke(this.target, this.arguments);
}
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/framework/Cglib2AopProxy.java
|
Java
|
apache-2.0
| 2,621
|
package cn.bugstack.springframework.aop.framework;
import cn.bugstack.springframework.aop.AdvisedSupport;
import org.aopalliance.intercept.MethodInterceptor;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
/**
* JDK-based {@link AopProxy} implementation for the Spring AOP framework,
* based on JDK {@link java.lang.reflect.Proxy dynamic proxies}.
* <p>
* JDK 动态代理
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class JdkDynamicAopProxy implements AopProxy, InvocationHandler {
private final AdvisedSupport advised;
public JdkDynamicAopProxy(AdvisedSupport advised) {
this.advised = advised;
}
@Override
public Object getProxy() {
return Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(), advised.getTargetSource().getTargetClass(), this);
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if (advised.getMethodMatcher().matches(method, advised.getTargetSource().getTarget().getClass())) {
MethodInterceptor methodInterceptor = advised.getMethodInterceptor();
return methodInterceptor.invoke(new ReflectiveMethodInvocation(advised.getTargetSource().getTarget(), method, args));
}
return method.invoke(advised.getTargetSource().getTarget(), args);
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/framework/JdkDynamicAopProxy.java
|
Java
|
apache-2.0
| 1,445
|
package cn.bugstack.springframework.aop.framework;
import cn.bugstack.springframework.aop.AdvisedSupport;
/**
* Factory for AOP proxies for programmatic use, rather than via a bean
* factory. This class provides a simple way of obtaining and configuring
* AOP proxies in code.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ProxyFactory {
private AdvisedSupport advisedSupport;
public ProxyFactory(AdvisedSupport advisedSupport) {
this.advisedSupport = advisedSupport;
}
public Object getProxy() {
return createAopProxy().getProxy();
}
private AopProxy createAopProxy() {
if (advisedSupport.isProxyTargetClass()) {
return new Cglib2AopProxy(advisedSupport);
}
return new JdkDynamicAopProxy(advisedSupport);
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/framework/ProxyFactory.java
|
Java
|
apache-2.0
| 855
|
package cn.bugstack.springframework.aop.framework;
import org.aopalliance.intercept.MethodInvocation;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Method;
/**
* <p>Invokes the target object using reflection. Subclasses can override the
* #invokeJoinpoint() method to change this behavior, so this is also
* a useful base class for more specialized MethodInvocation implementations.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ReflectiveMethodInvocation implements MethodInvocation {
// 目标对象
protected final Object target;
// 方法
protected final Method method;
// 入参
protected final Object[] arguments;
public ReflectiveMethodInvocation(Object target, Method method, Object[] arguments) {
this.target = target;
this.method = method;
this.arguments = arguments;
}
@Override
public Method getMethod() {
return method;
}
@Override
public Object[] getArguments() {
return arguments;
}
@Override
public Object proceed() throws Throwable {
return method.invoke(target, arguments);
}
@Override
public Object getThis() {
return target;
}
@Override
public AccessibleObject getStaticPart() {
return method;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/framework/ReflectiveMethodInvocation.java
|
Java
|
apache-2.0
| 1,364
|
package cn.bugstack.springframework.aop.framework.adapter;
import cn.bugstack.springframework.aop.MethodBeforeAdvice;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
/**
* Interceptor to wrap am {@link cn.bugstack.springframework.aop.MethodBeforeAdvice}.
* Used internally by the AOP framework; application developers should not need
* to use this class directly.
*/
public class MethodBeforeAdviceInterceptor implements MethodInterceptor {
private MethodBeforeAdvice advice;
public MethodBeforeAdviceInterceptor() {
}
public MethodBeforeAdviceInterceptor(MethodBeforeAdvice advice) {
this.advice = advice;
}
@Override
public Object invoke(MethodInvocation methodInvocation) throws Throwable {
this.advice.before(methodInvocation.getMethod(), methodInvocation.getArguments(), methodInvocation.getThis());
return methodInvocation.proceed();
}
public MethodBeforeAdvice getAdvice() {
return advice;
}
public void setAdvice(MethodBeforeAdvice advice) {
this.advice = advice;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/framework/adapter/MethodBeforeAdviceInterceptor.java
|
Java
|
apache-2.0
| 1,131
|
package cn.bugstack.springframework.aop.framework.autoproxy;
import cn.bugstack.springframework.aop.*;
import cn.bugstack.springframework.aop.aspectj.AspectJExpressionPointcutAdvisor;
import cn.bugstack.springframework.aop.framework.ProxyFactory;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.PropertyValues;
import cn.bugstack.springframework.beans.factory.BeanFactory;
import cn.bugstack.springframework.beans.factory.BeanFactoryAware;
import cn.bugstack.springframework.beans.factory.config.InstantiationAwareBeanPostProcessor;
import cn.bugstack.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.aopalliance.aop.Advice;
import org.aopalliance.intercept.MethodInterceptor;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* BeanPostProcessor implementation that creates AOP proxies based on all candidate
* Advisors in the current BeanFactory. This class is completely generic; it contains
* no special code to handle any particular aspects, such as pooling aspects.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class DefaultAdvisorAutoProxyCreator implements InstantiationAwareBeanPostProcessor, BeanFactoryAware {
private DefaultListableBeanFactory beanFactory;
private final Set<Object> earlyProxyReferences = Collections.synchronizedSet(new HashSet<Object>());
@Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
this.beanFactory = (DefaultListableBeanFactory) beanFactory;
}
@Override
public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException {
return null;
}
@Override
public boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException {
return true;
}
private boolean isInfrastructureClass(Class<?> beanClass) {
return Advice.class.isAssignableFrom(beanClass) || Pointcut.class.isAssignableFrom(beanClass) || Advisor.class.isAssignableFrom(beanClass);
}
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
return bean;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
if (!earlyProxyReferences.contains(beanName)) {
return wrapIfNecessary(bean, beanName);
}
return bean;
}
protected Object wrapIfNecessary(Object bean, String beanName) {
if (isInfrastructureClass(bean.getClass())) return bean;
Collection<AspectJExpressionPointcutAdvisor> advisors = beanFactory.getBeansOfType(AspectJExpressionPointcutAdvisor.class).values();
for (AspectJExpressionPointcutAdvisor advisor : advisors) {
ClassFilter classFilter = advisor.getPointcut().getClassFilter();
// 过滤匹配类
if (!classFilter.matches(bean.getClass())) continue;
AdvisedSupport advisedSupport = new AdvisedSupport();
TargetSource targetSource = new TargetSource(bean);
advisedSupport.setTargetSource(targetSource);
advisedSupport.setMethodInterceptor((MethodInterceptor) advisor.getAdvice());
advisedSupport.setMethodMatcher(advisor.getPointcut().getMethodMatcher());
advisedSupport.setProxyTargetClass(true);
// 返回代理对象
return new ProxyFactory(advisedSupport).getProxy();
}
return bean;
}
@Override
public Object getEarlyBeanReference(Object bean, String beanName) {
earlyProxyReferences.add(beanName);
return wrapIfNecessary(bean, beanName);
}
@Override
public PropertyValues postProcessPropertyValues(PropertyValues pvs, Object bean, String beanName) throws BeansException {
return pvs;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/aop/framework/autoproxy/DefaultAdvisorAutoProxyCreator.java
|
Java
|
apache-2.0
| 4,003
|
package cn.bugstack.springframework.beans;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class BeansException extends RuntimeException {
public BeansException(String msg) {
super(msg);
}
public BeansException(String msg, Throwable cause) {
super(msg, cause);
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/BeansException.java
|
Java
|
apache-2.0
| 329
|
package cn.bugstack.springframework.beans;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*
* bean 属性信息
*/
public class PropertyValue {
private final String name;
private final Object value;
public PropertyValue(String name, Object value) {
this.name = name;
this.value = value;
}
public String getName() {
return name;
}
public Object getValue() {
return value;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/PropertyValue.java
|
Java
|
apache-2.0
| 467
|
package cn.bugstack.springframework.beans;
import java.util.ArrayList;
import java.util.List;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class PropertyValues {
private final List<PropertyValue> propertyValueList = new ArrayList<>();
public void addPropertyValue(PropertyValue pv) {
for (int i = 0; i < this.propertyValueList.size(); i++) {
PropertyValue currentPv = this.propertyValueList.get(i);
if (currentPv.getName().equals(pv.getName())) {
// 覆盖原有的属性值
this.propertyValueList.set(i, pv);
return;
}
}
this.propertyValueList.add(pv);
}
public PropertyValue[] getPropertyValues() {
return this.propertyValueList.toArray(new PropertyValue[0]);
}
public PropertyValue getPropertyValue(String propertyName) {
for (PropertyValue pv : this.propertyValueList) {
if (pv.getName().equals(propertyName)) {
return pv;
}
}
return null;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/PropertyValues.java
|
Java
|
apache-2.0
| 1,094
|
package cn.bugstack.springframework.beans.factory;
/**
* Marker superinterface indicating that a bean is eligible to be
* notified by the Spring container of a particular framework object
* through a callback-style method. Actual method signature is
* determined by individual subinterfaces, but should typically
* consist of just one void-returning method that accepts a single
* argument.
*
* 标记类接口，实现该接口可以被Spring容器感知
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface Aware {
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/Aware.java
|
Java
|
apache-2.0
| 605
|
package cn.bugstack.springframework.beans.factory;
/**
* Callback that allows a bean to be aware of the bean
* {@link ClassLoader class loader}; that is, the class loader used by the
* present bean factory to load bean classes.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface BeanClassLoaderAware extends Aware{
void setBeanClassLoader(ClassLoader classLoader);
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/BeanClassLoaderAware.java
|
Java
|
apache-2.0
| 432
|
package cn.bugstack.springframework.beans.factory;
import cn.bugstack.springframework.beans.BeansException;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface BeanFactory {
Object getBean(String name) throws BeansException;
Object getBean(String name, Object... args) throws BeansException;
<T> T getBean(String name, Class<T> requiredType) throws BeansException;
<T> T getBean(Class<T> requiredType) throws BeansException;
/**
* Does this bean factory contain a bean definition or externally registered singleton
* instance with the given name?
* <p>If the given name is an alias, it will be translated back to the corresponding
* canonical bean name.
* <p>If this factory is hierarchical, will ask any parent factory if the bean cannot
* be found in this factory instance.
* <p>If a bean definition or singleton instance matching the given name is found,
* this method will return {@code true} whether the named bean definition is concrete
* or abstract, lazy or eager, in scope or not. Therefore, note that a {@code true}
* return value from this method does not necessarily indicate that {@link #getBean}
* will be able to obtain an instance for the same name.
* @param name the name of the bean to query
* @return whether a bean with the given name is present
*/
boolean containsBean(String name);
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/BeanFactory.java
|
Java
|
apache-2.0
| 1,441
|
package cn.bugstack.springframework.beans.factory;
import cn.bugstack.springframework.beans.BeansException;
/**
* Interface to be implemented by beans that wish to be aware of their
* owning {@link BeanFactory}.
*
* 实现此接口，既能感知到所属的 BeanFactory
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface BeanFactoryAware extends Aware {
void setBeanFactory(BeanFactory beanFactory) throws BeansException;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/BeanFactoryAware.java
|
Java
|
apache-2.0
| 485
|
package cn.bugstack.springframework.beans.factory;
/**
* Interface to be implemented by beans that want to be aware of their
* bean name in a bean factory. Note that it is not usually recommended
* that an object depend on its bean name, as this represents a potentially
* brittle dependence on external configuration, as well as a possibly
* unnecessary dependence on a Spring API.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface BeanNameAware extends Aware {
void setBeanName(String name);
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/BeanNameAware.java
|
Java
|
apache-2.0
| 559
|
package cn.bugstack.springframework.beans.factory;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.config.AutowireCapableBeanFactory;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import cn.bugstack.springframework.beans.factory.config.BeanPostProcessor;
import cn.bugstack.springframework.beans.factory.config.ConfigurableBeanFactory;
/**
* Configuration interface to be implemented by most listable bean factories.
* In addition to {@link ConfigurableBeanFactory}, it provides facilities to
* analyze and modify bean definitions, and to pre-instantiate singletons.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ConfigurableListableBeanFactory extends ListableBeanFactory, AutowireCapableBeanFactory, ConfigurableBeanFactory {
BeanDefinition getBeanDefinition(String beanName) throws BeansException;
void preInstantiateSingletons() throws BeansException;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/ConfigurableListableBeanFactory.java
|
Java
|
apache-2.0
| 1,012
|
package cn.bugstack.springframework.beans.factory;
/**
* Interface to be implemented by beans that want to release resources
* on destruction. A BeanFactory is supposed to invoke the destroy
* method if it disposes a cached singleton. An application context
* is supposed to dispose all of its singletons on close.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface DisposableBean {
void destroy() throws Exception;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/DisposableBean.java
|
Java
|
apache-2.0
| 478
|
package cn.bugstack.springframework.beans.factory;
/**
* Interface to be implemented by objects used within a {@link BeanFactory}
* which are themselves factories. If a bean implements this interface,
* it is used as a factory for an object to expose, not directly as a bean
* instance that will be exposed itself.
* @param <T>
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface FactoryBean<T> {
T getObject() throws Exception;
Class<?> getObjectType();
boolean isSingleton();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/FactoryBean.java
|
Java
|
apache-2.0
| 550
|
package cn.bugstack.springframework.beans.factory;
/**
* Sub-interface implemented by bean factories that can be part
* of a hierarchy.
*/
public interface HierarchicalBeanFactory extends BeanFactory {
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/HierarchicalBeanFactory.java
|
Java
|
apache-2.0
| 209
|
package cn.bugstack.springframework.beans.factory;
/**
* Interface to be implemented by beans that need to react once all their
* properties have been set by a BeanFactory: for example, to perform custom
* initialization, or merely to check that all mandatory properties have been set.
*
* 实现此接口的 Bean 对象，会在 BeanFactory 设置属性后作出相应的处理，如：执行自定义初始化，或者仅仅检查是否设置了所有强制属性。
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface InitializingBean {
/**
* Bean 处理了属性填充后调用
*
* @throws Exception
*/
void afterPropertiesSet() throws Exception;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/InitializingBean.java
|
Java
|
apache-2.0
| 738
|
package cn.bugstack.springframework.beans.factory;
import cn.bugstack.springframework.beans.BeansException;
import java.util.Map;
/**
* Extension of the {@link BeanFactory} interface to be implemented by bean factories
* that can enumerate all their bean instances, rather than attempting bean lookup
* by name one by one as requested by clients. BeanFactory implementations that
* preload all their bean definitions (such as XML-based factories) may implement
* this interface.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ListableBeanFactory extends BeanFactory{
/**
* 按照类型返回 Bean 实例
* @param type
* @param <T>
* @return
* @throws BeansException
*/
<T> Map<String, T> getBeansOfType(Class<T> type) throws BeansException;
/**
* Return the names of all beans defined in this registry.
*
* 返回注册表中所有的Bean名称
*/
String[] getBeanDefinitionNames();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/ListableBeanFactory.java
|
Java
|
apache-2.0
| 1,019
|
package cn.bugstack.springframework.beans.factory;
import cn.bugstack.springframework.beans.BeansException;
/**
* Defines a factory which can return an Object instance
* (possibly shared or independent) when invoked.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ObjectFactory<T> {
T getObject() throws BeansException;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/ObjectFactory.java
|
Java
|
apache-2.0
| 385
|
package cn.bugstack.springframework.beans.factory;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.PropertyValue;
import cn.bugstack.springframework.beans.PropertyValues;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import cn.bugstack.springframework.beans.factory.config.BeanFactoryPostProcessor;
import cn.bugstack.springframework.core.io.DefaultResourceLoader;
import cn.bugstack.springframework.core.io.Resource;
import cn.bugstack.springframework.util.StringValueResolver;
import java.io.IOException;
import java.util.Properties;
/**
* Allows for configuration of individual bean property values from a property resource,
* i.e. a properties file. Useful for custom config files targeted at system
* administrators that override bean properties configured in the application context.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class PropertyPlaceholderConfigurer implements BeanFactoryPostProcessor {
/**
* Default placeholder prefix: {@value}
*/
public static final String DEFAULT_PLACEHOLDER_PREFIX = "${";
/**
* Default placeholder suffix: {@value}
*/
public static final String DEFAULT_PLACEHOLDER_SUFFIX = "}";
private String location;
@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
try {
// 加载属性文件
DefaultResourceLoader resourceLoader = new DefaultResourceLoader();
Resource resource = resourceLoader.getResource(location);
// 占位符替换属性值
Properties properties = new Properties();
properties.load(resource.getInputStream());
String[] beanDefinitionNames = beanFactory.getBeanDefinitionNames();
for (String beanName : beanDefinitionNames) {
BeanDefinition beanDefinition = beanFactory.getBeanDefinition(beanName);
PropertyValues propertyValues = beanDefinition.getPropertyValues();
for (PropertyValue propertyValue : propertyValues.getPropertyValues()) {
Object value = propertyValue.getValue();
if (!(value instanceof String)) continue;
value = resolvePlaceholder((String) value, properties);
propertyValues.addPropertyValue(new PropertyValue(propertyValue.getName(), value));
}
}
// 向容器中添加字符串解析器，供解析@Value注解使用
StringValueResolver valueResolver = new PlaceholderResolvingStringValueResolver(properties);
beanFactory.addEmbeddedValueResolver(valueResolver);
} catch (IOException e) {
throw new BeansException("Could not load properties", e);
}
}
private String resolvePlaceholder(String value, Properties properties) {
String strVal = value;
StringBuilder buffer = new StringBuilder(strVal);
int startIdx = strVal.indexOf(DEFAULT_PLACEHOLDER_PREFIX);
int stopIdx = strVal.indexOf(DEFAULT_PLACEHOLDER_SUFFIX);
if (startIdx != -1 && stopIdx != -1 && startIdx < stopIdx) {
String propKey = strVal.substring(startIdx + 2, stopIdx);
String propVal = properties.getProperty(propKey);
buffer.replace(startIdx, stopIdx + 1, propVal);
}
return buffer.toString();
}
public void setLocation(String location) {
this.location = location;
}
private class PlaceholderResolvingStringValueResolver implements StringValueResolver {
private final Properties properties;
public PlaceholderResolvingStringValueResolver(Properties properties) {
this.properties = properties;
}
@Override
public String resolveStringValue(String strVal) {
return PropertyPlaceholderConfigurer.this.resolvePlaceholder(strVal, properties);
}
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/PropertyPlaceholderConfigurer.java
|
Java
|
apache-2.0
| 4,080
|
package cn.bugstack.springframework.beans.factory.annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Marks a constructor, field, setter method or config method as to be
* autowired by Spring's dependency injection facilities.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.CONSTRUCTOR, ElementType.FIELD, ElementType.METHOD})
public @interface Autowired {
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/annotation/Autowired.java
|
Java
|
apache-2.0
| 587
|
package cn.bugstack.springframework.beans.factory.annotation;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.PropertyValues;
import cn.bugstack.springframework.beans.factory.BeanFactory;
import cn.bugstack.springframework.beans.factory.BeanFactoryAware;
import cn.bugstack.springframework.beans.factory.ConfigurableListableBeanFactory;
import cn.bugstack.springframework.beans.factory.config.InstantiationAwareBeanPostProcessor;
import cn.bugstack.springframework.core.convert.ConversionService;
import cn.bugstack.springframework.util.ClassUtils;
import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.TypeUtil;
import java.lang.reflect.Field;
/**
* {@link cn.bugstack.springframework.beans.factory.config.BeanPostProcessor} implementation
* that autowires annotated fields, setter methods and arbitrary config methods.
* Such members to be injected are detected through a Java 5 annotation: by default,
* Spring's {@link Autowired @Autowired} and {@link Value @Value} annotations.
* <p>
* 处理 @Value、@Autowired，注解的 BeanPostProcessor
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class AutowiredAnnotationBeanPostProcessor implements InstantiationAwareBeanPostProcessor, BeanFactoryAware {
private ConfigurableListableBeanFactory beanFactory;
@Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
this.beanFactory = (ConfigurableListableBeanFactory) beanFactory;
}
@Override
public PropertyValues postProcessPropertyValues(PropertyValues pvs, Object bean, String beanName) throws BeansException {
// 1. 处理注解 @Value
Class<?> clazz = bean.getClass();
clazz = ClassUtils.isCglibProxyClass(clazz) ? clazz.getSuperclass() : clazz;
Field[] declaredFields = clazz.getDeclaredFields();
for (Field field : declaredFields) {
Value valueAnnotation = field.getAnnotation(Value.class);
if (null != valueAnnotation) {
Object value = valueAnnotation.value();
value = beanFactory.resolveEmbeddedValue((String) value);
// 类型转换
Class<?> sourceType = value.getClass();
Class<?> targetType = (Class<?>) TypeUtil.getType(field);
ConversionService conversionService = beanFactory.getConversionService();
if (conversionService != null) {
if (conversionService.canConvert(sourceType, targetType)) {
value = conversionService.convert(value, targetType);
}
}
BeanUtil.setFieldValue(bean, field.getName(), value);
}
}
// 2. 处理注解 @Autowired
for (Field field : declaredFields) {
Autowired autowiredAnnotation = field.getAnnotation(Autowired.class);
if (null != autowiredAnnotation) {
Class<?> fieldType = field.getType();
String dependentBeanName = null;
Qualifier qualifierAnnotation = field.getAnnotation(Qualifier.class);
Object dependentBean = null;
if (null != qualifierAnnotation) {
dependentBeanName = qualifierAnnotation.value();
dependentBean = beanFactory.getBean(dependentBeanName, fieldType);
} else {
dependentBean = beanFactory.getBean(fieldType);
}
BeanUtil.setFieldValue(bean, field.getName(), dependentBean);
}
}
return pvs;
}
@Override
public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException {
return null;
}
@Override
public boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException {
return true;
}
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
return null;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
return null;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/annotation/AutowiredAnnotationBeanPostProcessor.java
|
Java
|
apache-2.0
| 4,285
|
package cn.bugstack.springframework.beans.factory.annotation;
import java.lang.annotation.*;
/**
* This annotation may be used on a field or parameter as a qualifier for
* candidate beans when autowiring. It may also be used to annotate other
* custom annotations that can then in turn be used as qualifiers.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
@Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.TYPE, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface Qualifier {
String value() default "";
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/annotation/Qualifier.java
|
Java
|
apache-2.0
| 644
|
package cn.bugstack.springframework.beans.factory.annotation;
import java.lang.annotation.*;
/**
* Annotation at the field or method/constructor parameter level
* that indicates a default value expression for the affected argument.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
@Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Value {
/**
* The actual value expression: e.g. "#{systemProperties.myProp}".
*/
String value();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/annotation/Value.java
|
Java
|
apache-2.0
| 580
|
package cn.bugstack.springframework.beans.factory.config;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.BeanFactory;
/**
* Extension of the {@link cn.bugstack.springframework.beans.factory.BeanFactory}
* interface to be implemented by bean factories that are capable of
* autowiring, provided that they want to expose this functionality for
* existing bean instances.
*/
public interface AutowireCapableBeanFactory extends BeanFactory {
/**
* 执行 BeanPostProcessors 接口实现类的 postProcessBeforeInitialization 方法
*
* @param existingBean
* @param beanName
* @return
* @throws BeansException
*/
Object applyBeanPostProcessorsBeforeInitialization(Object existingBean, String beanName) throws BeansException;
/**
* 执行 BeanPostProcessors 接口实现类的 postProcessorsAfterInitialization 方法
*
* @param existingBean
* @param beanName
* @return
* @throws BeansException
*/
Object applyBeanPostProcessorsAfterInitialization(Object existingBean, String beanName) throws BeansException;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/config/AutowireCapableBeanFactory.java
|
Java
|
apache-2.0
| 1,160
|
package cn.bugstack.springframework.beans.factory.config;
import cn.bugstack.springframework.beans.PropertyValues;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class BeanDefinition {
String SCOPE_SINGLETON = ConfigurableBeanFactory.SCOPE_SINGLETON;
String SCOPE_PROTOTYPE = ConfigurableBeanFactory.SCOPE_PROTOTYPE;
private Class beanClass;
private PropertyValues propertyValues;
private String initMethodName;
private String destroyMethodName;
private String scope = SCOPE_SINGLETON;
private boolean singleton = true;
private boolean prototype = false;
public BeanDefinition(Class beanClass) {
this(beanClass, null);
}
public BeanDefinition(Class beanClass, PropertyValues propertyValues) {
this.beanClass = beanClass;
this.propertyValues = propertyValues != null ? propertyValues : new PropertyValues();
}
public void setScope(String scope) {
this.scope = scope;
this.singleton = SCOPE_SINGLETON.equals(scope);
this.prototype = SCOPE_PROTOTYPE.equals(scope);
}
public boolean isSingleton() {
return singleton;
}
public boolean isPrototype() {
return prototype;
}
public Class getBeanClass() {
return beanClass;
}
public void setBeanClass(Class beanClass) {
this.beanClass = beanClass;
}
public PropertyValues getPropertyValues() {
return propertyValues;
}
public void setPropertyValues(PropertyValues propertyValues) {
this.propertyValues = propertyValues;
}
public String getInitMethodName() {
return initMethodName;
}
public void setInitMethodName(String initMethodName) {
this.initMethodName = initMethodName;
}
public String getDestroyMethodName() {
return destroyMethodName;
}
public void setDestroyMethodName(String destroyMethodName) {
this.destroyMethodName = destroyMethodName;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/config/BeanDefinition.java
|
Java
|
apache-2.0
| 2,015
|
package cn.bugstack.springframework.beans.factory.config;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.ConfigurableListableBeanFactory;
/**
* Allows for custom modification of an application context's bean definitions,
* adapting the bean property values of the context's underlying bean factory.
*
* 允许自定义修改 BeanDefinition 属性信息
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface BeanFactoryPostProcessor {
/**
* 在所有的 BeanDefinition 加载完成后，实例化 Bean 对象之前，提供修改 BeanDefinition 属性的机制
*
* @param beanFactory
* @throws BeansException
*/
void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/config/BeanFactoryPostProcessor.java
|
Java
|
apache-2.0
| 855
|
package cn.bugstack.springframework.beans.factory.config;
import cn.bugstack.springframework.beans.BeansException;
/**
* Factory hook that allows for custom modification of new bean instances,
* e.g. checking for marker interfaces or wrapping them with proxies.
*
* 用于修改新实例化 Bean 对象的扩展点
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface BeanPostProcessor {
/**
* 在 Bean 对象执行初始化方法之前，执行此方法
*
* @param bean
* @param beanName
* @return
* @throws BeansException
*/
Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException;
/**
* 在 Bean 对象执行初始化方法之后，执行此方法
*
* @param bean
* @param beanName
* @return
* @throws BeansException
*/
Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/config/BeanPostProcessor.java
|
Java
|
apache-2.0
| 993
|
package cn.bugstack.springframework.beans.factory.config;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*
* Bean 的引用
*/
public class BeanReference {
private final String beanName;
public BeanReference(String beanName) {
this.beanName = beanName;
}
public String getBeanName() {
return beanName;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/config/BeanReference.java
|
Java
|
apache-2.0
| 368
|
package cn.bugstack.springframework.beans.factory.config;
import cn.bugstack.springframework.beans.factory.HierarchicalBeanFactory;
import cn.bugstack.springframework.core.convert.ConversionService;
import cn.bugstack.springframework.util.StringValueResolver;
import org.jetbrains.annotations.Nullable;
/**
* Configuration interface to be implemented by most bean factories. Provides
* facilities to configure a bean factory, in addition to the bean factory
* client methods in the {@link cn.bugstack.springframework.beans.factory.BeanFactory}
* interface.
*/
public interface ConfigurableBeanFactory extends HierarchicalBeanFactory, SingletonBeanRegistry {
String SCOPE_SINGLETON = "singleton";
String SCOPE_PROTOTYPE = "prototype";
void addBeanPostProcessor(BeanPostProcessor beanPostProcessor);
/**
* 销毁单例对象
*/
void destroySingletons();
/**
* Add a String resolver for embedded values such as annotation attributes.
* @param valueResolver the String resolver to apply to embedded values
* @since 3.0
*/
void addEmbeddedValueResolver(StringValueResolver valueResolver);
/**
* Resolve the given embedded value, e.g. an annotation attribute.
* @param value the value to resolve
* @return the resolved value (may be the original value as-is)
* @since 3.0
*/
String resolveEmbeddedValue(String value);
/**
* Specify a Spring 3.0 ConversionService to use for converting
* property values, as an alternative to JavaBeans PropertyEditors.
* @since 3.0
*/
void setConversionService(ConversionService conversionService);
/**
* Return the associated ConversionService, if any.
* @since 3.0
*/
@Nullable
ConversionService getConversionService();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/config/ConfigurableBeanFactory.java
|
Java
|
apache-2.0
| 1,813
|
package cn.bugstack.springframework.beans.factory.config;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.PropertyValues;
/**
* Subinterface of {@link BeanPostProcessor} that adds a before-instantiation callback,
* and a callback after instantiation but before explicit properties are set or
* autowiring occurs.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface InstantiationAwareBeanPostProcessor extends BeanPostProcessor {
/**
* Apply this BeanPostProcessor <i>before the target bean gets instantiated</i>.
* The returned bean object may be a proxy to use instead of the target bean,
* effectively suppressing default instantiation of the target bean.
* <p>
* 在 Bean 对象执行初始化方法之前，执行此方法
*
* @param beanClass
* @param beanName
* @return
* @throws BeansException
*/
Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException;
/**
* Perform operations after the bean has been instantiated, via a constructor or factory method,
* but before Spring property population (from explicit properties or autowiring) occurs.
* <p>This is the ideal callback for performing field injection on the given bean instance.
* See Spring's own {@link cn.bugstack.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor}
* for a typical example.
* <p>
* 在 Bean 对象执行初始化方法之后，执行此方法
*
* @param bean
* @param beanName
* @return
* @throws BeansException
*/
boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException;
/**
* Post-process the given property values before the factory applies them
* to the given bean. Allows for checking whether all dependencies have been
* satisfied, for example based on a "Required" annotation on bean property setters.
* <p>
* 在 Bean 对象实例化完成后，设置属性操作之前执行此方法
*
* @param pvs
* @param bean
* @param beanName
* @return
* @throws BeansException
*/
PropertyValues postProcessPropertyValues(PropertyValues pvs, Object bean, String beanName) throws BeansException;
/**
* 在 Spring 中由 SmartInstantiationAwareBeanPostProcessor#getEarlyBeanReference 提供
* @param bean
* @param beanName
* @return
*/
default Object getEarlyBeanReference(Object bean, String beanName) {
return bean;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/config/InstantiationAwareBeanPostProcessor.java
|
Java
|
apache-2.0
| 2,662
|
package cn.bugstack.springframework.beans.factory.config;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
* <p>
* 单例注册表
*/
public interface SingletonBeanRegistry {
Object getSingleton(String beanName);
void registerSingleton(String beanName, Object singletonObject);
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/config/SingletonBeanRegistry.java
|
Java
|
apache-2.0
| 359
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.PropertyValue;
import cn.bugstack.springframework.beans.PropertyValues;
import cn.bugstack.springframework.beans.factory.*;
import cn.bugstack.springframework.beans.factory.config.*;
import cn.bugstack.springframework.context.ApplicationContextAware;
import cn.bugstack.springframework.core.convert.ConversionService;
import cn.bugstack.springframework.util.ClassUtils;
import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.convert.BasicType;
import cn.hutool.core.util.StrUtil;
import cn.hutool.core.util.TypeUtil;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
/**
* Abstract bean factory superclass that implements default bean creation,
* with the full capabilities specified by the class.
* Implements the {@link cn.bugstack.springframework.beans.factory.config.AutowireCapableBeanFactory}
* interface in addition to AbstractBeanFactory's {@link #createBean} method.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFactory implements AutowireCapableBeanFactory {
private InstantiationStrategy instantiationStrategy = new SimpleInstantiationStrategy();
@Override
protected Object createBean(String beanName, BeanDefinition beanDefinition, Object[] args) throws BeansException {
// 判断是否返回代理 Bean 对象
Object bean = resolveBeforeInstantiation(beanName, beanDefinition);
if (null != bean) {
return bean;
}
return doCreateBean(beanName, beanDefinition, args);
}
protected Object doCreateBean(String beanName, BeanDefinition beanDefinition, Object[] args) {
Object bean = null;
try {
// 实例化 Bean
bean = createBeanInstance(beanDefinition, beanName, args);
// 处理循环依赖，将实例化后的Bean对象提前放入缓存中暴露出来
if (beanDefinition.isSingleton()) {
Object finalBean = bean;
addSingletonFactory(beanName, () -> getEarlyBeanReference(beanName, beanDefinition, finalBean));
}
// 实例化后判断
boolean continueWithPropertyPopulation = applyBeanPostProcessorsAfterInstantiation(beanName, bean);
if (!continueWithPropertyPopulation) {
return bean;
}
// 在设置 Bean 属性之前，允许 BeanPostProcessor 修改属性值
applyBeanPostProcessorsBeforeApplyingPropertyValues(beanName, bean, beanDefinition);
// 给 Bean 填充属性
applyPropertyValues(beanName, bean, beanDefinition);
// 执行 Bean 的初始化方法和 BeanPostProcessor 的前置和后置处理方法
bean = initializeBean(beanName, bean, beanDefinition);
} catch (Exception e) {
throw new BeansException("Instantiation of bean failed", e);
}
// 注册实现了 DisposableBean 接口的 Bean 对象
registerDisposableBeanIfNecessary(beanName, bean, beanDefinition);
// 判断 SCOPE_SINGLETON、SCOPE_PROTOTYPE
Object exposedObject = bean;
if (beanDefinition.isSingleton()) {
// 获取代理对象
exposedObject = getSingleton(beanName);
registerSingleton(beanName, exposedObject);
}
return exposedObject;
}
protected Object getEarlyBeanReference(String beanName, BeanDefinition beanDefinition, Object bean) {
Object exposedObject = bean;
for (BeanPostProcessor beanPostProcessor : getBeanPostProcessors()) {
if (beanPostProcessor instanceof InstantiationAwareBeanPostProcessor) {
exposedObject = ((InstantiationAwareBeanPostProcessor) beanPostProcessor).getEarlyBeanReference(exposedObject, beanName);
if (null == exposedObject) return exposedObject;
}
}
return exposedObject;
}
/**
* Bean 实例化后对于返回 false 的对象，不在执行后续设置 Bean 对象属性的操作
*
* @param beanName
* @param bean
* @return
*/
private boolean applyBeanPostProcessorsAfterInstantiation(String beanName, Object bean) {
boolean continueWithPropertyPopulation = true;
for (BeanPostProcessor beanPostProcessor : getBeanPostProcessors()) {
if (beanPostProcessor instanceof InstantiationAwareBeanPostProcessor) {
InstantiationAwareBeanPostProcessor instantiationAwareBeanPostProcessor = (InstantiationAwareBeanPostProcessor) beanPostProcessor;
if (!instantiationAwareBeanPostProcessor.postProcessAfterInstantiation(bean, beanName)) {
continueWithPropertyPopulation = false;
break;
}
}
}
return continueWithPropertyPopulation;
}
/**
* 在设置 Bean 属性之前，允许 BeanPostProcessor 修改属性值
*
* @param beanName
* @param bean
* @param beanDefinition
*/
protected void applyBeanPostProcessorsBeforeApplyingPropertyValues(String beanName, Object bean, BeanDefinition beanDefinition) {
for (BeanPostProcessor beanPostProcessor : getBeanPostProcessors()) {
if (beanPostProcessor instanceof InstantiationAwareBeanPostProcessor) {
PropertyValues pvs = ((InstantiationAwareBeanPostProcessor) beanPostProcessor).postProcessPropertyValues(beanDefinition.getPropertyValues(), bean, beanName);
if (null != pvs) {
for (PropertyValue propertyValue : pvs.getPropertyValues()) {
beanDefinition.getPropertyValues().addPropertyValue(propertyValue);
}
}
}
}
}
protected Object resolveBeforeInstantiation(String beanName, BeanDefinition beanDefinition) {
Object bean = applyBeanPostProcessorsBeforeInstantiation(beanDefinition.getBeanClass(), beanName);
if (null != bean) {
bean = applyBeanPostProcessorsAfterInitialization(bean, beanName);
}
return bean;
}
protected Object applyBeanPostProcessorsBeforeInstantiation(Class<?> beanClass, String beanName) {
for (BeanPostProcessor beanPostProcessor : getBeanPostProcessors()) {
if (beanPostProcessor instanceof InstantiationAwareBeanPostProcessor) {
Object result = ((InstantiationAwareBeanPostProcessor) beanPostProcessor).postProcessBeforeInstantiation(beanClass, beanName);
if (null != result) return result;
}
}
return null;
}
protected void registerDisposableBeanIfNecessary(String beanName, Object bean, BeanDefinition beanDefinition) {
// 非 Singleton 类型的 Bean 不执行销毁方法
if (!beanDefinition.isSingleton()) return;
if (bean instanceof DisposableBean || StrUtil.isNotEmpty(beanDefinition.getDestroyMethodName())) {
registerDisposableBean(beanName, new DisposableBeanAdapter(bean, beanName, beanDefinition));
}
}
protected Object createBeanInstance(BeanDefinition beanDefinition, String beanName, Object[] args) {
Constructor constructorToUse = null;
Class<?> beanClass = beanDefinition.getBeanClass();
Constructor<?>[] declaredConstructors = beanClass.getDeclaredConstructors();
for (Constructor ctor : declaredConstructors) {
if (null != args && ctor.getParameterTypes().length == args.length) {
constructorToUse = ctor;
break;
}
}
return getInstantiationStrategy().instantiate(beanDefinition, beanName, constructorToUse, args);
}
/**
* Bean 属性填充
*/
protected void applyPropertyValues(String beanName, Object bean, BeanDefinition beanDefinition) {
try {
PropertyValues propertyValues = beanDefinition.getPropertyValues();
for (PropertyValue propertyValue : propertyValues.getPropertyValues()) {
String name = propertyValue.getName();
Object value = propertyValue.getValue();
if (value instanceof BeanReference) {
// A 依赖 B，获取 B 的实例化
BeanReference beanReference = (BeanReference) value;
value = getBean(beanReference.getBeanName());
}
// 类型转换
else {
Class<?> sourceType = value.getClass();
Class<?> targetType = (Class<?>) TypeUtil.getFieldType(bean.getClass(), name);
ConversionService conversionService = getConversionService();
if (conversionService != null) {
if (conversionService.canConvert(sourceType, targetType)) {
value = conversionService.convert(value, targetType);
}
}
}
// 反射设置属性填充
BeanUtil.setFieldValue(bean, name, value);
}
} catch (Exception e) {
throw new BeansException("Error setting property values：" + beanName + " message：" + e);
}
}
public InstantiationStrategy getInstantiationStrategy() {
return instantiationStrategy;
}
public void setInstantiationStrategy(InstantiationStrategy instantiationStrategy) {
this.instantiationStrategy = instantiationStrategy;
}
private Object initializeBean(String beanName, Object bean, BeanDefinition beanDefinition) {
// invokeAwareMethods
if (bean instanceof Aware) {
if (bean instanceof BeanFactoryAware) {
((BeanFactoryAware) bean).setBeanFactory(this);
}
if (bean instanceof BeanClassLoaderAware) {
((BeanClassLoaderAware) bean).setBeanClassLoader(getBeanClassLoader());
}
if (bean instanceof BeanNameAware) {
((BeanNameAware) bean).setBeanName(beanName);
}
}
// 1. 执行 BeanPostProcessor Before 处理
Object wrappedBean = applyBeanPostProcessorsBeforeInitialization(bean, beanName);
// 执行 Bean 对象的初始化方法
try {
invokeInitMethods(beanName, wrappedBean, beanDefinition);
} catch (Exception e) {
throw new BeansException("Invocation of init method of bean[" + beanName + "] failed", e);
}
// 2. 执行 BeanPostProcessor After 处理
wrappedBean = applyBeanPostProcessorsAfterInitialization(wrappedBean, beanName);
return wrappedBean;
}
private void invokeInitMethods(String beanName, Object bean, BeanDefinition beanDefinition) throws Exception {
// 1. 实现接口 InitializingBean
if (bean instanceof InitializingBean) {
((InitializingBean) bean).afterPropertiesSet();
}
// 2. 注解配置 init-method {判断是为了避免二次执行销毁}
String initMethodName = beanDefinition.getInitMethodName();
if (StrUtil.isNotEmpty(initMethodName)) {
Method initMethod = beanDefinition.getBeanClass().getMethod(initMethodName);
if (null == initMethod) {
throw new BeansException("Could not find an init method named '" + initMethodName + "' on bean with name '" + beanName + "'");
}
initMethod.invoke(bean);
}
}
@Override
public Object applyBeanPostProcessorsBeforeInitialization(Object existingBean, String beanName) throws BeansException {
Object result = existingBean;
for (BeanPostProcessor processor : getBeanPostProcessors()) {
Object current = processor.postProcessBeforeInitialization(result, beanName);
if (null == current) return result;
result = current;
}
return result;
}
@Override
public Object applyBeanPostProcessorsAfterInitialization(Object existingBean, String beanName) throws BeansException {
Object result = existingBean;
for (BeanPostProcessor processor : getBeanPostProcessors()) {
Object current = processor.postProcessAfterInitialization(result, beanName);
if (null == current) return result;
result = current;
}
return result;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/AbstractAutowireCapableBeanFactory.java
|
Java
|
apache-2.0
| 12,730
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.core.io.DefaultResourceLoader;
import cn.bugstack.springframework.core.io.ResourceLoader;
/**
* Abstract base class for bean definition readers which implement
* the {@link BeanDefinitionReader} interface.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class AbstractBeanDefinitionReader implements BeanDefinitionReader {
private final BeanDefinitionRegistry registry;
private ResourceLoader resourceLoader;
protected AbstractBeanDefinitionReader(BeanDefinitionRegistry registry) {
this(registry, new DefaultResourceLoader());
}
public AbstractBeanDefinitionReader(BeanDefinitionRegistry registry, ResourceLoader resourceLoader) {
this.registry = registry;
this.resourceLoader = resourceLoader;
}
@Override
public BeanDefinitionRegistry getRegistry() {
return registry;
}
@Override
public ResourceLoader getResourceLoader() {
return resourceLoader;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/AbstractBeanDefinitionReader.java
|
Java
|
apache-2.0
| 1,159
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.BeanFactory;
import cn.bugstack.springframework.beans.factory.FactoryBean;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import cn.bugstack.springframework.beans.factory.config.BeanPostProcessor;
import cn.bugstack.springframework.beans.factory.config.ConfigurableBeanFactory;
import cn.bugstack.springframework.core.convert.ConversionService;
import cn.bugstack.springframework.util.ClassUtils;
import cn.bugstack.springframework.util.StringValueResolver;
import java.util.ArrayList;
import java.util.List;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
* <p>
* BeanDefinition注册表接口
*/
public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport implements ConfigurableBeanFactory {
/**
* ClassLoader to resolve bean class names with, if necessary
*/
private ClassLoader beanClassLoader = ClassUtils.getDefaultClassLoader();
/**
* BeanPostProcessors to apply in createBean
*/
private final List<BeanPostProcessor> beanPostProcessors = new ArrayList<BeanPostProcessor>();
/**
* String resolvers to apply e.g. to annotation attribute values
*/
private final List<StringValueResolver> embeddedValueResolvers = new ArrayList<>();
private ConversionService conversionService;
@Override
public Object getBean(String name) throws BeansException {
return doGetBean(name, null);
}
@Override
public Object getBean(String name, Object... args) throws BeansException {
return doGetBean(name, args);
}
@Override
public <T> T getBean(String name, Class<T> requiredType) throws BeansException {
return (T) getBean(name);
}
@Override
public boolean containsBean(String name) {
return containsBeanDefinition(name);
}
protected abstract boolean containsBeanDefinition(String beanName);
protected <T> T doGetBean(final String name, final Object[] args) {
Object sharedInstance = getSingleton(name);
if (sharedInstance != null) {
// 如果是 FactoryBean，则需要调用 FactoryBean#getObject
return (T) getObjectForBeanInstance(sharedInstance, name);
}
BeanDefinition beanDefinition = getBeanDefinition(name);
Object bean = createBean(name, beanDefinition, args);
return (T) getObjectForBeanInstance(bean, name);
}
private Object getObjectForBeanInstance(Object beanInstance, String beanName) {
if (!(beanInstance instanceof FactoryBean)) {
return beanInstance;
}
Object object = getCachedObjectForFactoryBean(beanName);
if (object == null) {
FactoryBean<?> factoryBean = (FactoryBean<?>) beanInstance;
object = getObjectFromFactoryBean(factoryBean, beanName);
}
return object;
}
protected abstract BeanDefinition getBeanDefinition(String beanName) throws BeansException;
protected abstract Object createBean(String beanName, BeanDefinition beanDefinition, Object[] args) throws BeansException;
@Override
public void addBeanPostProcessor(BeanPostProcessor beanPostProcessor) {
this.beanPostProcessors.remove(beanPostProcessor);
this.beanPostProcessors.add(beanPostProcessor);
}
@Override
public void addEmbeddedValueResolver(StringValueResolver valueResolver) {
this.embeddedValueResolvers.add(valueResolver);
}
@Override
public String resolveEmbeddedValue(String value) {
String result = value;
for (StringValueResolver resolver : this.embeddedValueResolvers) {
result = resolver.resolveStringValue(result);
}
return result;
}
@Override
public void setConversionService(ConversionService conversionService) {
this.conversionService = conversionService;
}
@Override
public ConversionService getConversionService() {
return conversionService;
}
/**
* Return the list of BeanPostProcessors that will get applied
* to beans created with this factory.
*/
public List<BeanPostProcessor> getBeanPostProcessors() {
return this.beanPostProcessors;
}
public ClassLoader getBeanClassLoader() {
return this.beanClassLoader;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/AbstractBeanFactory.java
|
Java
|
apache-2.0
| 4,484
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.core.io.Resource;
import cn.bugstack.springframework.core.io.ResourceLoader;
/**
* Simple interface for bean definition readers.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface BeanDefinitionReader {
BeanDefinitionRegistry getRegistry();
ResourceLoader getResourceLoader();
void loadBeanDefinitions(Resource resource) throws BeansException;
void loadBeanDefinitions(Resource... resources) throws BeansException;
void loadBeanDefinitions(String location) throws BeansException;
void loadBeanDefinitions(String... locations) throws BeansException;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/BeanDefinitionReader.java
|
Java
|
apache-2.0
| 785
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface BeanDefinitionRegistry {
/**
* 向注册表中注册 BeanDefinition
*
* @param beanName
* @param beanDefinition
*/
void registerBeanDefinition(String beanName, BeanDefinition beanDefinition);
/**
* 使用Bean名称查询BeanDefinition
*
* @param beanName
* @return
* @throws BeansException
*/
BeanDefinition getBeanDefinition(String beanName) throws BeansException;
/**
* 判断是否包含指定名称的BeanDefinition
* @param beanName
* @return
*/
boolean containsBeanDefinition(String beanName);
/**
* Return the names of all beans defined in this registry.
*
* 返回注册表中所有的Bean名称
*/
String[] getBeanDefinitionNames();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/BeanDefinitionRegistry.java
|
Java
|
apache-2.0
| 1,052
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.NoOp;
import java.lang.reflect.Constructor;
public class CglibSubclassingInstantiationStrategy implements InstantiationStrategy {
@Override
public Object instantiate(BeanDefinition beanDefinition, String beanName, Constructor ctor, Object[] args) throws BeansException {
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(beanDefinition.getBeanClass());
enhancer.setCallback(new NoOp() {
@Override
public int hashCode() {
return super.hashCode();
}
});
if (null == ctor) return enhancer.create();
return enhancer.create(ctor.getParameterTypes(), args);
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/CglibSubclassingInstantiationStrategy.java
|
Java
|
apache-2.0
| 932
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.ConfigurableListableBeanFactory;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import cn.bugstack.springframework.beans.factory.config.ConfigurableBeanFactory;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFactory implements BeanDefinitionRegistry, ConfigurableListableBeanFactory {
private Map<String, BeanDefinition> beanDefinitionMap = new ConcurrentHashMap<>();
@Override
public void registerBeanDefinition(String beanName, BeanDefinition beanDefinition) {
beanDefinitionMap.put(beanName, beanDefinition);
}
@Override
public boolean containsBeanDefinition(String beanName) {
return beanDefinitionMap.containsKey(beanName);
}
@Override
public <T> Map<String, T> getBeansOfType(Class<T> type) throws BeansException {
Map<String, T> result = new HashMap<>();
beanDefinitionMap.forEach((beanName, beanDefinition) -> {
Class beanClass = beanDefinition.getBeanClass();
if (type.isAssignableFrom(beanClass)) {
result.put(beanName, (T) getBean(beanName));
}
});
return result;
}
@Override
public String[] getBeanDefinitionNames() {
return beanDefinitionMap.keySet().toArray(new String[0]);
}
@Override
public BeanDefinition getBeanDefinition(String beanName) throws BeansException {
BeanDefinition beanDefinition = beanDefinitionMap.get(beanName);
if (beanDefinition == null) throw new BeansException("No bean named '" + beanName + "' is defined");
return beanDefinition;
}
@Override
public void preInstantiateSingletons() throws BeansException {
beanDefinitionMap.keySet().forEach(this::getBean);
}
@Override
public <T> T getBean(Class<T> requiredType) throws BeansException {
List<String> beanNames = new ArrayList<>();
for (Map.Entry<String, BeanDefinition> entry : beanDefinitionMap.entrySet()) {
Class beanClass = entry.getValue().getBeanClass();
if (requiredType.isAssignableFrom(beanClass)) {
beanNames.add(entry.getKey());
}
}
if (1 == beanNames.size()) {
return getBean(beanNames.get(0), requiredType);
}
throw new BeansException(requiredType + "expected single bean but found " + beanNames.size() + ": " + beanNames);
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/DefaultListableBeanFactory.java
|
Java
|
apache-2.0
| 2,737
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.DisposableBean;
import cn.bugstack.springframework.beans.factory.ObjectFactory;
import cn.bugstack.springframework.beans.factory.config.SingletonBeanRegistry;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class DefaultSingletonBeanRegistry implements SingletonBeanRegistry {
/**
* Internal marker for a null singleton object:
* used as marker value for concurrent Maps (which don't support null values).
*/
protected static final Object NULL_OBJECT = new Object();
// 一级缓存，普通对象
/**
* Cache of singleton objects: bean name --> bean instance
*/
private Map<String, Object> singletonObjects = new ConcurrentHashMap<>();
// 二级缓存，提前暴漏对象，没有完全实例化的对象
/**
* Cache of early singleton objects: bean name --> bean instance
*/
protected final Map<String, Object> earlySingletonObjects = new HashMap<String, Object>();
// 三级缓存，存放代理对象
/**
* Cache of singleton factories: bean name --> ObjectFactory
*/
private final Map<String, ObjectFactory<?>> singletonFactories = new HashMap<String, ObjectFactory<?>>();
private final Map<String, DisposableBean> disposableBeans = new LinkedHashMap<>();
@Override
public Object getSingleton(String beanName) {
Object singletonObject = singletonObjects.get(beanName);
if (null == singletonObject) {
singletonObject = earlySingletonObjects.get(beanName);
// 判断二级缓存中是否有对象，这个对象就是代理对象，因为只有代理对象才会放到三级缓存中
if (null == singletonObject) {
ObjectFactory<?> singletonFactory = singletonFactories.get(beanName);
if (singletonFactory != null) {
singletonObject = singletonFactory.getObject();
// 把三级缓存中的代理对象中的真实对象获取出来，放入二级缓存中
earlySingletonObjects.put(beanName, singletonObject);
singletonFactories.remove(beanName);
}
}
}
return singletonObject;
}
public void registerSingleton(String beanName, Object singletonObject) {
singletonObjects.put(beanName, singletonObject);
earlySingletonObjects.remove(beanName);
singletonFactories.remove(beanName);
}
protected void addSingletonFactory(String beanName, ObjectFactory<?> singletonFactory){
if (!this.singletonObjects.containsKey(beanName)) {
this.singletonFactories.put(beanName, singletonFactory);
this.earlySingletonObjects.remove(beanName);
}
}
public void registerDisposableBean(String beanName, DisposableBean bean) {
disposableBeans.put(beanName, bean);
}
public void destroySingletons() {
Set<String> keySet = this.disposableBeans.keySet();
Object[] disposableBeanNames = keySet.toArray();
for (int i = disposableBeanNames.length - 1; i >= 0; i--) {
Object beanName = disposableBeanNames[i];
DisposableBean disposableBean = disposableBeans.remove(beanName);
try {
disposableBean.destroy();
} catch (Exception e) {
throw new BeansException("Destroy method on bean with name '" + beanName + "' threw an exception", e);
}
}
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/DefaultSingletonBeanRegistry.java
|
Java
|
apache-2.0
| 3,812
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.DisposableBean;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import cn.hutool.core.util.StrUtil;
import java.lang.reflect.Method;
/**
* Adapter that implements the {@link DisposableBean} and {@link Runnable} interfaces
* performing various destruction steps on a given bean instance:
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class DisposableBeanAdapter implements DisposableBean {
private final Object bean;
private final String beanName;
private String destroyMethodName;
public DisposableBeanAdapter(Object bean, String beanName, BeanDefinition beanDefinition) {
this.bean = bean;
this.beanName = beanName;
this.destroyMethodName = beanDefinition.getDestroyMethodName();
}
@Override
public void destroy() throws Exception {
// 1. 实现接口 DisposableBean
if (bean instanceof DisposableBean) {
((DisposableBean) bean).destroy();
}
// 2. 注解配置 destroy-method {判断是为了避免二次执行销毁}
if (StrUtil.isNotEmpty(destroyMethodName) && !(bean instanceof DisposableBean && "destroy".equals(this.destroyMethodName))) {
Method destroyMethod = bean.getClass().getMethod(destroyMethodName);
if (null == destroyMethod) {
throw new BeansException("Couldn't find a destroy method named '" + destroyMethodName + "' on bean with name '" + beanName + "'");
}
destroyMethod.invoke(bean);
}
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/DisposableBeanAdapter.java
|
Java
|
apache-2.0
| 1,746
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.FactoryBean;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* Support base class for singleton registries which need to handle
* {@link cn.bugstack.springframework.beans.factory.FactoryBean} instances,
* integrated with {@link DefaultSingletonBeanRegistry}'s singleton management.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class FactoryBeanRegistrySupport extends DefaultSingletonBeanRegistry {
/**
* Cache of singleton objects created by FactoryBeans: FactoryBean name --> object
*/
private final Map<String, Object> factoryBeanObjectCache = new ConcurrentHashMap<String, Object>();
protected Object getCachedObjectForFactoryBean(String beanName) {
Object object = this.factoryBeanObjectCache.get(beanName);
return (object != NULL_OBJECT ? object : null);
}
protected Object getObjectFromFactoryBean(FactoryBean factory, String beanName) {
if (factory.isSingleton()) {
Object object = this.factoryBeanObjectCache.get(beanName);
if (object == null) {
object = doGetObjectFromFactoryBean(factory, beanName);
this.factoryBeanObjectCache.put(beanName, (object != null ? object : NULL_OBJECT));
}
return (object != NULL_OBJECT ? object : null);
} else {
return doGetObjectFromFactoryBean(factory, beanName);
}
}
private Object doGetObjectFromFactoryBean(final FactoryBean factory, final String beanName){
try {
return factory.getObject();
} catch (Exception e) {
throw new BeansException("FactoryBean threw exception on object[" + beanName + "] creation", e);
}
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/FactoryBeanRegistrySupport.java
|
Java
|
apache-2.0
| 1,947
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import java.lang.reflect.Constructor;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
* <p>
* Bean 实例化策略
*/
public interface InstantiationStrategy {
Object instantiate(BeanDefinition beanDefinition, String beanName, Constructor ctor, Object[] args) throws BeansException;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/InstantiationStrategy.java
|
Java
|
apache-2.0
| 501
|
package cn.bugstack.springframework.beans.factory.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class SimpleInstantiationStrategy implements InstantiationStrategy {
@Override
public Object instantiate(BeanDefinition beanDefinition, String beanName, Constructor ctor, Object[] args) throws BeansException {
Class clazz = beanDefinition.getBeanClass();
try {
if (null != ctor) {
return clazz.getDeclaredConstructor(ctor.getParameterTypes()).newInstance(args);
} else {
return clazz.getDeclaredConstructor().newInstance();
}
} catch (NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
throw new BeansException("Failed to instantiate [" + clazz.getName() + "]", e);
}
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/support/SimpleInstantiationStrategy.java
|
Java
|
apache-2.0
| 1,109
|
package cn.bugstack.springframework.beans.factory.xml;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.PropertyValue;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import cn.bugstack.springframework.beans.factory.config.BeanReference;
import cn.bugstack.springframework.beans.factory.support.AbstractBeanDefinitionReader;
import cn.bugstack.springframework.beans.factory.support.BeanDefinitionRegistry;
import cn.bugstack.springframework.context.annotation.ClassPathBeanDefinitionScanner;
import cn.bugstack.springframework.core.io.Resource;
import cn.bugstack.springframework.core.io.ResourceLoader;
import cn.hutool.core.util.StrUtil;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
/**
* Bean definition reader for XML bean definitions.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class XmlBeanDefinitionReader extends AbstractBeanDefinitionReader {
public XmlBeanDefinitionReader(BeanDefinitionRegistry registry) {
super(registry);
}
public XmlBeanDefinitionReader(BeanDefinitionRegistry registry, ResourceLoader resourceLoader) {
super(registry, resourceLoader);
}
@Override
public void loadBeanDefinitions(Resource resource) throws BeansException {
try {
try (InputStream inputStream = resource.getInputStream()) {
doLoadBeanDefinitions(inputStream);
}
} catch (IOException | ClassNotFoundException | DocumentException e) {
throw new BeansException("IOException parsing XML document from " + resource, e);
}
}
@Override
public void loadBeanDefinitions(Resource... resources) throws BeansException {
for (Resource resource : resources) {
loadBeanDefinitions(resource);
}
}
@Override
public void loadBeanDefinitions(String location) throws BeansException {
ResourceLoader resourceLoader = getResourceLoader();
Resource resource = resourceLoader.getResource(location);
loadBeanDefinitions(resource);
}
@Override
public void loadBeanDefinitions(String... locations) throws BeansException {
for (String location : locations) {
loadBeanDefinitions(location);
}
}
protected void doLoadBeanDefinitions(InputStream inputStream) throws ClassNotFoundException, DocumentException {
SAXReader reader = new SAXReader();
Document document = reader.read(inputStream);
Element root = document.getRootElement();
// 解析 context:component-scan 标签，扫描包中的类并提取相关信息，用于组装 BeanDefinition
Element componentScan = root.element("component-scan");
if (null != componentScan) {
String scanPath = componentScan.attributeValue("base-package");
if (StrUtil.isEmpty(scanPath)) {
throw new BeansException("The value of base-package attribute can not be empty or null");
}
scanPackage(scanPath);
}
List<Element> beanList = root.elements("bean");
for (Element bean : beanList) {
String id = bean.attributeValue("id");
String name = bean.attributeValue("name");
String className = bean.attributeValue("class");
String initMethod = bean.attributeValue("init-method");
String destroyMethodName = bean.attributeValue("destroy-method");
String beanScope = bean.attributeValue("scope");
// 获取 Class，方便获取类中的名称
Class<?> clazz = Class.forName(className);
// 优先级 id > name
String beanName = StrUtil.isNotEmpty(id) ? id : name;
if (StrUtil.isEmpty(beanName)) {
beanName = StrUtil.lowerFirst(clazz.getSimpleName());
}
// 定义Bean
BeanDefinition beanDefinition = new BeanDefinition(clazz);
beanDefinition.setInitMethodName(initMethod);
beanDefinition.setDestroyMethodName(destroyMethodName);
if (StrUtil.isNotEmpty(beanScope)) {
beanDefinition.setScope(beanScope);
}
List<Element> propertyList = bean.elements("property");
// 读取属性并填充
for (Element property : propertyList) {
// 解析标签：property
String attrName = property.attributeValue("name");
String attrValue = property.attributeValue("value");
String attrRef = property.attributeValue("ref");
// 获取属性值：引入对象、值对象
Object value = StrUtil.isNotEmpty(attrRef) ? new BeanReference(attrRef) : attrValue;
// 创建属性信息
PropertyValue propertyValue = new PropertyValue(attrName, value);
beanDefinition.getPropertyValues().addPropertyValue(propertyValue);
}
if (getRegistry().containsBeanDefinition(beanName)) {
throw new BeansException("Duplicate beanName[" + beanName + "] is not allowed");
}
// 注册 BeanDefinition
getRegistry().registerBeanDefinition(beanName, beanDefinition);
}
}
private void scanPackage(String scanPath) {
String[] basePackages = StrUtil.splitToArray(scanPath, ',');
ClassPathBeanDefinitionScanner scanner = new ClassPathBeanDefinitionScanner(getRegistry());
scanner.doScan(basePackages);
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/beans/factory/xml/XmlBeanDefinitionReader.java
|
Java
|
apache-2.0
| 5,770
|
package cn.bugstack.springframework.context;
import cn.bugstack.springframework.beans.factory.HierarchicalBeanFactory;
import cn.bugstack.springframework.beans.factory.ListableBeanFactory;
import cn.bugstack.springframework.core.io.ResourceLoader;
/**
* Central interface to provide configuration for an application.
* This is read-only while the application is running, but may be
* reloaded if the implementation supports this.
* <p>
* 应用上下文
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ApplicationContext extends ListableBeanFactory, HierarchicalBeanFactory, ResourceLoader, ApplicationEventPublisher {
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/ApplicationContext.java
|
Java
|
apache-2.0
| 684
|
package cn.bugstack.springframework.context;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.Aware;
/**
* Interface to be implemented by any object that wishes to be notified
* of the {@link ApplicationContext} that it runs in.
*
* 实现此接口，既能感知到所属的 ApplicationContext
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ApplicationContextAware extends Aware {
void setApplicationContext(ApplicationContext applicationContext) throws BeansException;
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/ApplicationContextAware.java
|
Java
|
apache-2.0
| 599
|
package cn.bugstack.springframework.context;
import java.util.EventObject;
/**
* Class to be extended by all application events. Abstract as it
* doesn't make sense for generic events to be published directly.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class ApplicationEvent extends EventObject {
/**
* Constructs a prototypical Event.
*
* @param source The object on which the Event initially occurred.
* @throws IllegalArgumentException if source is null.
*/
public ApplicationEvent(Object source) {
super(source);
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/ApplicationEvent.java
|
Java
|
apache-2.0
| 629
|
package cn.bugstack.springframework.context;
/**
* Interface that encapsulates event publication functionality.
* Serves as super-interface for ApplicationContext.
*
* 事件发布者接口
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ApplicationEventPublisher {
/**
* Notify all listeners registered with this application of an application
* event. Events may be framework events (such as RequestHandledEvent)
* or application-specific events.
* @param event the event to publish
*/
void publishEvent(ApplicationEvent event);
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/ApplicationEventPublisher.java
|
Java
|
apache-2.0
| 624
|
package cn.bugstack.springframework.context;
import java.util.EventListener;
/**
* Interface to be implemented by application event listeners.
* Based on the standard <code>java.util.EventListener</code> interface
* for the Observer design pattern.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ApplicationListener<E extends ApplicationEvent> extends EventListener {
/**
* Handle an application event.
* @param event the event to respond to
*/
void onApplicationEvent(E event);
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/ApplicationListener.java
|
Java
|
apache-2.0
| 564
|
package cn.bugstack.springframework.context;
import cn.bugstack.springframework.beans.BeansException;
/**
* SPI interface to be implemented by most if not all application contexts.
* Provides facilities to configure an application context in addition
* to the application context client methods in the
* {@link cn.bugstack.springframework.context.ApplicationContext} interface.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ConfigurableApplicationContext extends ApplicationContext {
/**
* 刷新容器
*
* @throws BeansException
*/
void refresh() throws BeansException;
void registerShutdownHook();
void close();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/ConfigurableApplicationContext.java
|
Java
|
apache-2.0
| 716
|
package cn.bugstack.springframework.context.annotation;
import cn.bugstack.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import cn.bugstack.springframework.beans.factory.support.BeanDefinitionRegistry;
import cn.bugstack.springframework.stereotype.Component;
import cn.hutool.core.util.StrUtil;
import java.util.Set;
/**
* A bean definition scanner that detects bean candidates on the classpath,
* registering corresponding bean definitions with a given registry ({@code BeanFactory}
* or {@code ApplicationContext}).
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ClassPathBeanDefinitionScanner extends ClassPathScanningCandidateComponentProvider {
private BeanDefinitionRegistry registry;
public ClassPathBeanDefinitionScanner(BeanDefinitionRegistry registry) {
this.registry = registry;
}
public void doScan(String... basePackages) {
for (String basePackage : basePackages) {
Set<BeanDefinition> candidates = findCandidateComponents(basePackage);
for (BeanDefinition beanDefinition : candidates) {
// 解析 Bean 的作用域 singleton、prototype
String beanScope = resolveBeanScope(beanDefinition);
if (StrUtil.isNotEmpty(beanScope)) {
beanDefinition.setScope(beanScope);
}
registry.registerBeanDefinition(determineBeanName(beanDefinition), beanDefinition);
}
}
// 注册处理注解的 BeanPostProcessor（@Autowired、@Value）
registry.registerBeanDefinition("cn.bugstack.springframework.context.annotation.internalAutowiredAnnotationProcessor", new BeanDefinition(AutowiredAnnotationBeanPostProcessor.class));
}
private String resolveBeanScope(BeanDefinition beanDefinition) {
Class<?> beanClass = beanDefinition.getBeanClass();
Scope scope = beanClass.getAnnotation(Scope.class);
if (null != scope) return scope.value();
return StrUtil.EMPTY;
}
private String determineBeanName(BeanDefinition beanDefinition) {
Class<?> beanClass = beanDefinition.getBeanClass();
Component component = beanClass.getAnnotation(Component.class);
String value = component.value();
if (StrUtil.isEmpty(value)) {
value = StrUtil.lowerFirst(beanClass.getSimpleName());
}
return value;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/annotation/ClassPathBeanDefinitionScanner.java
|
Java
|
apache-2.0
| 2,551
|
package cn.bugstack.springframework.context.annotation;
import cn.bugstack.springframework.beans.factory.config.BeanDefinition;
import cn.bugstack.springframework.stereotype.Component;
import cn.hutool.core.util.ClassUtil;
import java.util.LinkedHashSet;
import java.util.Set;
/**
* A component provider that scans the classpath from a base package. It then
* applies exclude and include filters to the resulting classes to find candidates.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ClassPathScanningCandidateComponentProvider {
public Set<BeanDefinition> findCandidateComponents(String basePackage) {
Set<BeanDefinition> candidates = new LinkedHashSet<>();
Set<Class<?>> classes = ClassUtil.scanPackageByAnnotation(basePackage, Component.class);
for (Class<?> clazz : classes) {
candidates.add(new BeanDefinition(clazz));
}
return candidates;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/annotation/ClassPathScanningCandidateComponentProvider.java
|
Java
|
apache-2.0
| 973
|
package cn.bugstack.springframework.context.annotation;
import java.lang.annotation.*;
@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Scope {
String value() default "singleton";
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/annotation/Scope.java
|
Java
|
apache-2.0
| 255
|
package cn.bugstack.springframework.context.event;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.BeanFactory;
import cn.bugstack.springframework.beans.factory.BeanFactoryAware;
import cn.bugstack.springframework.context.ApplicationEvent;
import cn.bugstack.springframework.context.ApplicationListener;
import cn.bugstack.springframework.util.ClassUtils;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.Set;
/**
* Abstract implementation of the {@link ApplicationEventMulticaster} interface,
* providing the basic listener registration facility.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class AbstractApplicationEventMulticaster implements ApplicationEventMulticaster, BeanFactoryAware {
public final Set<ApplicationListener<ApplicationEvent>> applicationListeners = new LinkedHashSet<>();
private BeanFactory beanFactory;
@Override
public void addApplicationListener(ApplicationListener<?> listener) {
applicationListeners.add((ApplicationListener<ApplicationEvent>) listener);
}
@Override
public void removeApplicationListener(ApplicationListener<?> listener) {
applicationListeners.remove(listener);
}
@Override
public final void setBeanFactory(BeanFactory beanFactory) {
this.beanFactory = beanFactory;
}
/**
* Return a Collection of ApplicationListeners matching the given
* event type. Non-matching listeners get excluded early.
* @param event the event to be propagated. Allows for excluding
* non-matching listeners early, based on cached matching information.
* @return a Collection of ApplicationListeners
* @see cn.bugstack.springframework.context.ApplicationListener
*/
protected Collection<ApplicationListener> getApplicationListeners(ApplicationEvent event) {
LinkedList<ApplicationListener> allListeners = new LinkedList<ApplicationListener>();
for (ApplicationListener<ApplicationEvent> listener : applicationListeners) {
if (supportsEvent(listener, event)) allListeners.add(listener);
}
return allListeners;
}
/**
* 监听器是否对该事件感兴趣
*/
protected boolean supportsEvent(ApplicationListener<ApplicationEvent> applicationListener, ApplicationEvent event) {
Class<? extends ApplicationListener> listenerClass = applicationListener.getClass();
// 按照 CglibSubclassingInstantiationStrategy、SimpleInstantiationStrategy 不同的实例化类型，需要判断后获取目标 class
Class<?> targetClass = ClassUtils.isCglibProxyClass(listenerClass) ? listenerClass.getSuperclass() : listenerClass;
Type genericInterface = targetClass.getGenericInterfaces()[0];
Type actualTypeArgument = ((ParameterizedType) genericInterface).getActualTypeArguments()[0];
String className = actualTypeArgument.getTypeName();
Class<?> eventClassName;
try {
eventClassName = Class.forName(className);
} catch (ClassNotFoundException e) {
throw new BeansException("wrong event class name: " + className);
}
// 判定此 eventClassName 对象所表示的类或接口与指定的 event.getClass() 参数所表示的类或接口是否相同，或是否是其超类或超接口。
// isAssignableFrom是用来判断子类和父类的关系的，或者接口的实现类和接口的关系的，默认所有的类的终极父类都是Object。如果A.isAssignableFrom(B)结果是true，证明B可以转换成为A,也就是A可以由B转换而来。
return eventClassName.isAssignableFrom(event.getClass());
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/event/AbstractApplicationEventMulticaster.java
|
Java
|
apache-2.0
| 3,896
|
package cn.bugstack.springframework.context.event;
import cn.bugstack.springframework.context.ApplicationContext;
import cn.bugstack.springframework.context.ApplicationEvent;
/**
* Base class for events raised for an <code>ApplicationContext</code>.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ApplicationContextEvent extends ApplicationEvent {
/**
* Constructs a prototypical Event.
*
* @param source The object on which the Event initially occurred.
* @throws IllegalArgumentException if source is null.
*/
public ApplicationContextEvent(Object source) {
super(source);
}
/**
* Get the <code>ApplicationContext</code> that the event was raised for.
*/
public final ApplicationContext getApplicationContext() {
return (ApplicationContext) getSource();
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/event/ApplicationContextEvent.java
|
Java
|
apache-2.0
| 890
|
package cn.bugstack.springframework.context.event;
import cn.bugstack.springframework.context.ApplicationEvent;
import cn.bugstack.springframework.context.ApplicationListener;
/**
* Interface to be implemented by objects that can manage a number of
* {@link ApplicationListener} objects, and publish events to them.
*
* 事件广播器
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ApplicationEventMulticaster {
/**
* Add a listener to be notified of all events.
* @param listener the listener to add
*/
void addApplicationListener(ApplicationListener<?> listener);
/**
* Remove a listener from the notification list.
* @param listener the listener to remove
*/
void removeApplicationListener(ApplicationListener<?> listener);
/**
* Multicast the given application event to appropriate listeners.
* @param event the event to multicast
*/
void multicastEvent(ApplicationEvent event);
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/event/ApplicationEventMulticaster.java
|
Java
|
apache-2.0
| 1,018
|
package cn.bugstack.springframework.context.event;
/**
* Event raised when an <code>ApplicationContext</code> gets closed.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ContextClosedEvent extends ApplicationContextEvent{
/**
* Constructs a prototypical Event.
*
* @param source The object on which the Event initially occurred.
* @throws IllegalArgumentException if source is null.
*/
public ContextClosedEvent(Object source) {
super(source);
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/event/ContextClosedEvent.java
|
Java
|
apache-2.0
| 546
|
package cn.bugstack.springframework.context.event;
/**
* Event raised when an <code>ApplicationContext</code> gets initialized or refreshed.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ContextRefreshedEvent extends ApplicationContextEvent{
/**
* Constructs a prototypical Event.
*
* @param source The object on which the Event initially occurred.
* @throws IllegalArgumentException if source is null.
*/
public ContextRefreshedEvent(Object source) {
super(source);
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/event/ContextRefreshedEvent.java
|
Java
|
apache-2.0
| 569
|
package cn.bugstack.springframework.context.event;
import cn.bugstack.springframework.beans.factory.BeanFactory;
import cn.bugstack.springframework.context.ApplicationEvent;
import cn.bugstack.springframework.context.ApplicationListener;
/**
* Simple implementation of the {@link ApplicationEventMulticaster} interface.
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class SimpleApplicationEventMulticaster extends AbstractApplicationEventMulticaster {
public SimpleApplicationEventMulticaster(BeanFactory beanFactory) {
setBeanFactory(beanFactory);
}
@SuppressWarnings("unchecked")
@Override
public void multicastEvent(final ApplicationEvent event) {
for (final ApplicationListener listener : getApplicationListeners(event)) {
listener.onApplicationEvent(event);
}
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/event/SimpleApplicationEventMulticaster.java
|
Java
|
apache-2.0
| 883
|
package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.ConfigurableListableBeanFactory;
import cn.bugstack.springframework.beans.factory.config.BeanFactoryPostProcessor;
import cn.bugstack.springframework.beans.factory.config.BeanPostProcessor;
import cn.bugstack.springframework.context.ApplicationEvent;
import cn.bugstack.springframework.context.ApplicationListener;
import cn.bugstack.springframework.context.ConfigurableApplicationContext;
import cn.bugstack.springframework.context.event.ApplicationEventMulticaster;
import cn.bugstack.springframework.context.event.ContextClosedEvent;
import cn.bugstack.springframework.context.event.ContextRefreshedEvent;
import cn.bugstack.springframework.context.event.SimpleApplicationEventMulticaster;
import cn.bugstack.springframework.core.convert.ConversionService;
import cn.bugstack.springframework.core.io.DefaultResourceLoader;
import java.util.Collection;
import java.util.Map;
/**
* Abstract implementation of the {@link cn.bugstack.springframework.context.ApplicationContext}
* interface. Doesn't mandate the type of storage used for configuration; simply
* implements common context functionality. Uses the Template Method design pattern,
* requiring concrete subclasses to implement abstract methods.
* <p>
* 抽象应用上下文
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class AbstractApplicationContext extends DefaultResourceLoader implements ConfigurableApplicationContext {
public static final String APPLICATION_EVENT_MULTICASTER_BEAN_NAME = "applicationEventMulticaster";
private ApplicationEventMulticaster applicationEventMulticaster;
@Override
public void refresh() throws BeansException {
// 1. 创建 BeanFactory，并加载 BeanDefinition
refreshBeanFactory();
// 2. 获取 BeanFactory
ConfigurableListableBeanFactory beanFactory = getBeanFactory();
// 3. 添加 ApplicationContextAwareProcessor，让继承自 ApplicationContextAware 的 Bean 对象都能感知所属的 ApplicationContext
beanFactory.addBeanPostProcessor(new ApplicationContextAwareProcessor(this));
// 4. 在 Bean 实例化之前，执行 BeanFactoryPostProcessor (Invoke factory processors registered as beans in the context.)
invokeBeanFactoryPostProcessors(beanFactory);
// 5. BeanPostProcessor 需要提前于其他 Bean 对象实例化之前执行注册操作
registerBeanPostProcessors(beanFactory);
// 6. 初始化事件发布者
initApplicationEventMulticaster();
// 7. 注册事件监听器
registerListeners();
// 8. 设置类型转换器、提前实例化单例Bean对象
finishBeanFactoryInitialization(beanFactory);
// 9. 发布容器刷新完成事件
finishRefresh();
}
// 设置类型转换器、提前实例化单例Bean对象
protected void finishBeanFactoryInitialization(ConfigurableListableBeanFactory beanFactory) {
// 设置类型转换器
if (beanFactory.containsBean("conversionService")) {
Object conversionService = beanFactory.getBean("conversionService");
if (conversionService instanceof ConversionService) {
beanFactory.setConversionService((ConversionService) conversionService);
}
}
// 提前实例化单例Bean对象
beanFactory.preInstantiateSingletons();
}
protected abstract void refreshBeanFactory() throws BeansException;
protected abstract ConfigurableListableBeanFactory getBeanFactory();
private void invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory beanFactory) {
Map<String, BeanFactoryPostProcessor> beanFactoryPostProcessorMap = beanFactory.getBeansOfType(BeanFactoryPostProcessor.class);
for (BeanFactoryPostProcessor beanFactoryPostProcessor : beanFactoryPostProcessorMap.values()) {
beanFactoryPostProcessor.postProcessBeanFactory(beanFactory);
}
}
private void registerBeanPostProcessors(ConfigurableListableBeanFactory beanFactory) {
Map<String, BeanPostProcessor> beanPostProcessorMap = beanFactory.getBeansOfType(BeanPostProcessor.class);
for (BeanPostProcessor beanPostProcessor : beanPostProcessorMap.values()) {
beanFactory.addBeanPostProcessor(beanPostProcessor);
}
}
private void initApplicationEventMulticaster() {
ConfigurableListableBeanFactory beanFactory = getBeanFactory();
applicationEventMulticaster = new SimpleApplicationEventMulticaster(beanFactory);
beanFactory.registerSingleton(APPLICATION_EVENT_MULTICASTER_BEAN_NAME, applicationEventMulticaster);
}
private void registerListeners() {
Collection<ApplicationListener> applicationListeners = getBeansOfType(ApplicationListener.class).values();
for (ApplicationListener listener : applicationListeners) {
applicationEventMulticaster.addApplicationListener(listener);
}
}
private void finishRefresh() {
publishEvent(new ContextRefreshedEvent(this));
}
@Override
public void publishEvent(ApplicationEvent event) {
applicationEventMulticaster.multicastEvent(event);
}
@Override
public <T> Map<String, T> getBeansOfType(Class<T> type) throws BeansException {
return getBeanFactory().getBeansOfType(type);
}
@Override
public String[] getBeanDefinitionNames() {
return getBeanFactory().getBeanDefinitionNames();
}
@Override
public Object getBean(String name) throws BeansException {
return getBeanFactory().getBean(name);
}
@Override
public Object getBean(String name, Object... args) throws BeansException {
return getBeanFactory().getBean(name, args);
}
@Override
public <T> T getBean(String name, Class<T> requiredType) throws BeansException {
return getBeanFactory().getBean(name, requiredType);
}
@Override
public <T> T getBean(Class<T> requiredType) throws BeansException {
return getBeanFactory().getBean(requiredType);
}
@Override
public boolean containsBean(String name) {
return getBeanFactory().containsBean(name);
}
@Override
public void registerShutdownHook() {
Runtime.getRuntime().addShutdownHook(new Thread(this::close));
}
@Override
public void close() {
// 发布容器关闭事件
publishEvent(new ContextClosedEvent(this));
// 执行销毁单例bean的销毁方法
getBeanFactory().destroySingletons();
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/support/AbstractApplicationContext.java
|
Java
|
apache-2.0
| 6,785
|
package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.ConfigurableListableBeanFactory;
import cn.bugstack.springframework.beans.factory.support.DefaultListableBeanFactory;
/**
* Base class for {@link cn.bugstack.springframework.context.ApplicationContext}
* implementations which are supposed to support multiple calls to {@link #refresh()},
* creating a new internal bean factory instance every time.
* Typically (but not necessarily), such a context will be driven by
* a set of config locations to load bean definitions from.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class AbstractRefreshableApplicationContext extends AbstractApplicationContext {
private DefaultListableBeanFactory beanFactory;
@Override
protected void refreshBeanFactory() throws BeansException {
DefaultListableBeanFactory beanFactory = createBeanFactory();
loadBeanDefinitions(beanFactory);
this.beanFactory = beanFactory;
}
private DefaultListableBeanFactory createBeanFactory() {
return new DefaultListableBeanFactory();
}
protected abstract void loadBeanDefinitions(DefaultListableBeanFactory beanFactory);
@Override
protected ConfigurableListableBeanFactory getBeanFactory() {
return beanFactory;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/support/AbstractRefreshableApplicationContext.java
|
Java
|
apache-2.0
| 1,435
|
package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.factory.support.DefaultListableBeanFactory;
import cn.bugstack.springframework.beans.factory.xml.XmlBeanDefinitionReader;
/**
* Convenient base class for {@link cn.bugstack.springframework.context.ApplicationContext}
* implementations, drawing configuration from XML documents containing bean definitions
* understood by an {@link cn.bugstack.springframework.beans.factory.xml.XmlBeanDefinitionReader}.
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public abstract class AbstractXmlApplicationContext extends AbstractRefreshableApplicationContext {
@Override
protected void loadBeanDefinitions(DefaultListableBeanFactory beanFactory) {
XmlBeanDefinitionReader beanDefinitionReader = new XmlBeanDefinitionReader(beanFactory, this);
String[] configLocations = getConfigLocations();
if (null != configLocations){
beanDefinitionReader.loadBeanDefinitions(configLocations);
}
}
protected abstract String[] getConfigLocations();
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/support/AbstractXmlApplicationContext.java
|
Java
|
apache-2.0
| 1,124
|
package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.BeansException;
import cn.bugstack.springframework.beans.factory.config.BeanPostProcessor;
import cn.bugstack.springframework.context.ApplicationContext;
import cn.bugstack.springframework.context.ApplicationContextAware;
/**
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ApplicationContextAwareProcessor implements BeanPostProcessor {
private final ApplicationContext applicationContext;
public ApplicationContextAwareProcessor(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
if (bean instanceof ApplicationContextAware){
((ApplicationContextAware) bean).setApplicationContext(applicationContext);
}
return bean;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
return bean;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/support/ApplicationContextAwareProcessor.java
|
Java
|
apache-2.0
| 1,114
|
package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.BeansException;
/**
* Standalone XML application context, taking the context definition files
* from the class path, interpreting plain paths as class path resource names
* that include the package path (e.g. "mypackage/myresource.txt"). Useful for
* test harnesses as well as for application contexts embedded within JARs.
* <p>
* XML 文件应用上下文
* <p>
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ClassPathXmlApplicationContext extends AbstractXmlApplicationContext {
private String[] configLocations;
public ClassPathXmlApplicationContext() {
}
/**
* 从 XML 中加载 BeanDefinition，并刷新上下文
*
* @param configLocations
* @throws BeansException
*/
public ClassPathXmlApplicationContext(String configLocations) throws BeansException {
this(new String[]{configLocations});
}
/**
* 从 XML 中加载 BeanDefinition，并刷新上下文
* @param configLocations
* @throws BeansException
*/
public ClassPathXmlApplicationContext(String[] configLocations) throws BeansException {
this.configLocations = configLocations;
refresh();
}
@Override
protected String[] getConfigLocations() {
return configLocations;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/support/ClassPathXmlApplicationContext.java
|
Java
|
apache-2.0
| 1,414
|
package cn.bugstack.springframework.context.support;
import cn.bugstack.springframework.beans.factory.FactoryBean;
import cn.bugstack.springframework.beans.factory.InitializingBean;
import cn.bugstack.springframework.core.convert.ConversionService;
import cn.bugstack.springframework.core.convert.converter.Converter;
import cn.bugstack.springframework.core.convert.converter.ConverterFactory;
import cn.bugstack.springframework.core.convert.converter.ConverterRegistry;
import cn.bugstack.springframework.core.convert.converter.GenericConverter;
import cn.bugstack.springframework.core.convert.support.DefaultConversionService;
import cn.bugstack.springframework.core.convert.support.GenericConversionService;
import org.jetbrains.annotations.Nullable;
import java.util.Set;
/**
* A factory providing convenient access to a ConversionService configured with
* converters appropriate for most environments. Set the
* setConverters "converters" property to supplement the default converters.
*
* 提供创建 ConversionService 工厂
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public class ConversionServiceFactoryBean implements FactoryBean<ConversionService>, InitializingBean {
@Nullable
private Set<?> converters;
@Nullable
private GenericConversionService conversionService;
@Override
public ConversionService getObject() throws Exception {
return conversionService;
}
@Override
public Class<?> getObjectType() {
return conversionService.getClass();
}
@Override
public boolean isSingleton() {
return true;
}
@Override
public void afterPropertiesSet() throws Exception {
this.conversionService = new DefaultConversionService();
registerConverters(converters, conversionService);
}
private void registerConverters(Set<?> converters, ConverterRegistry registry) {
if (converters != null) {
for (Object converter : converters) {
if (converter instanceof GenericConverter) {
registry.addConverter((GenericConverter) converter);
} else if (converter instanceof Converter<?, ?>) {
registry.addConverter((Converter<?, ?>) converter);
} else if (converter instanceof ConverterFactory<?, ?>) {
registry.addConverterFactory((ConverterFactory<?, ?>) converter);
} else {
throw new IllegalArgumentException("Each converter object must implement one of the " +
"Converter, ConverterFactory, or GenericConverter interfaces");
}
}
}
}
public void setConverters(Set<?> converters) {
this.converters = converters;
}
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/context/support/ConversionServiceFactoryBean.java
|
Java
|
apache-2.0
| 2,817
|
package cn.bugstack.springframework.core.convert;
import org.jetbrains.annotations.Nullable;
/**
* A service interface for type conversion. This is the entry point into the convert system.
* Call {@link #convert(Object, Class)} to perform a thread-safe type conversion using this system.
*
* 类型转换抽象接口
*
*
*
*
*
*
* 作者：DerekYRC https://github.com/DerekYRC/mini-spring
*/
public interface ConversionService {
/** Return {@code true} if objects of {@code sourceType} can be converted to the {@code targetType}. */
boolean canConvert(@Nullable Class<?> sourceType, Class<?> targetType);
/** Convert the given {@code source} to the specified {@code targetType}. */
<T> T convert(Object source, Class<T> targetType);
}
|
2302_77879529/spring
|
small-spring-step-17/src/main/java/cn/bugstack/springframework/core/convert/ConversionService.java
|
Java
|
apache-2.0
| 768
|