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224e773 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | //! Shared memory state persistence
use std::collections::HashMap;
pub struct SharedMemory {
state: HashMap<String, Vec<u8>>,
}
impl SharedMemory {
pub fn new() -> Self {
SharedMemory {
state: HashMap::new(),
}
}
pub fn write(&mut self, key: &str, value: Vec<u8>) {
self.state.insert(key.to_string(), value);
}
pub fn read(&self, key: &str) -> Option<&[u8]> {
self.state.get(key).map(|v| v.as_slice())
}
pub fn clear(&mut self) {
self.state.clear();
}
}
impl Default for SharedMemory {
fn default() -> Self {
Self::new()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn shared_memory() {
let mut mem = SharedMemory::new();
mem.write("key1", vec![1, 2, 3]);
assert_eq!(mem.read("key1"), Some(&[1, 2, 3][..]));
}
}
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