File size: 14,388 Bytes
9abace2 | 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 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 | """
Sovereign LLM Engine — Python Asyncio Daemon
Part of SOVEREIGN PYTHON LLM ENGINE
Persistent background daemon that exposes a TCP socket for IPC (port 19002).
Receives JSON task messages, routes them to registered handlers, and responds
with JSON results. Supports graceful shutdown and health-check ping.
"""
from __future__ import annotations
import asyncio
import json
import logging
import signal
import sys
from dataclasses import dataclass, field
from datetime import datetime, timezone
from pathlib import Path
from typing import Any, Callable, Coroutine, Protocol
# ==========================================
# Logging
# ==========================================
logger = logging.getLogger("sovereign.daemon")
logging.basicConfig(
level=logging.INFO,
format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
)
# ==========================================
# Data Types
# ==========================================
@dataclass
class DaemonTask:
"""Inbound task received from a client."""
task_id: str
type: str
payload: dict[str, Any]
created_at: str = field(default_factory=lambda: datetime.now(timezone.utc).isoformat())
@dataclass
class DaemonResponse:
"""Outbound response sent back to a client."""
task_id: str
result: dict[str, Any]
error: str | None = None
def to_json(self) -> str:
return json.dumps({
"task_id": self.task_id,
"result": self.result,
"error": self.error,
})
# ==========================================
# Handler Protocol
# ==========================================
class DaemonHandler(Protocol):
"""
Handler protocol for daemon tasks.
Every registered handler must implement this interface.
async handle(task) must return a plain dict result.
"""
async def handle(self, task: DaemonTask) -> dict[str, Any]:
"""Process a task and return a result dict."""
...
# ==========================================
# Built-in Handlers
# ==========================================
class EchoHandler:
"""Built-in echo handler for testing; returns payload as-is."""
async def handle(self, task: DaemonTask) -> dict[str, Any]:
return {"echo": task.payload, "task_id": task.task_id}
class StatusHandler:
"""Built-in status handler; reports daemon uptime and registered types."""
def __init__(self, daemon: "PythonDaemon") -> None:
self._daemon = daemon
async def handle(self, task: DaemonTask) -> dict[str, Any]:
return {
"status": "running",
"registered_types": list(self._daemon._handlers.keys()),
"started_at": self._daemon._started_at,
}
# ==========================================
# Client Connection
# ==========================================
class _ClientConnection:
"""
Manages a single connected client.
Reads newline-delimited JSON messages from the reader and writes
newline-delimited JSON responses back to the writer. The special
plain-text message "PING\\n" is answered with "PONG\\n" without
deserialising as JSON.
"""
def __init__(
self,
reader: asyncio.StreamReader,
writer: asyncio.StreamWriter,
dispatch: Callable[[DaemonTask], Coroutine[Any, Any, DaemonResponse]],
) -> None:
self._reader = reader
self._writer = writer
self._dispatch = dispatch
async def run(self) -> None:
peer = self._writer.get_extra_info("peername", "<unknown>")
logger.debug("Client connected: %s", peer)
try:
while True:
line = await self._reader.readline()
if not line:
break # EOF — client disconnected
raw = line.strip()
# Health-check fast path
if raw == b"PING":
self._writer.write(b"PONG\n")
await self._writer.drain()
continue
# Parse JSON task
try:
msg = json.loads(raw)
except json.JSONDecodeError as exc:
error_resp = json.dumps({
"task_id": "unknown",
"result": {},
"error": f"JSON parse error: {exc}",
})
self._writer.write((error_resp + "\n").encode())
await self._writer.drain()
continue
# Validate required fields
task_id = msg.get("task_id", "")
task_type = msg.get("type", "")
payload = msg.get("payload", {})
if not task_id or not task_type:
error_resp = json.dumps({
"task_id": task_id or "unknown",
"result": {},
"error": "Missing required fields: task_id, type",
})
self._writer.write((error_resp + "\n").encode())
await self._writer.drain()
continue
task = DaemonTask(
task_id=task_id,
type=task_type,
payload=payload if isinstance(payload, dict) else {},
)
response = await self._dispatch(task)
self._writer.write((response.to_json() + "\n").encode())
await self._writer.drain()
except asyncio.CancelledError:
pass
except ConnectionResetError:
pass
except Exception as exc:
logger.warning("Error in client connection from %s: %s", peer, exc)
finally:
try:
self._writer.close()
await self._writer.wait_closed()
except Exception:
pass
logger.debug("Client disconnected: %s", peer)
# ==========================================
# Main Daemon
# ==========================================
class PythonDaemon:
"""
Persistent asyncio daemon.
Usage:
daemon = PythonDaemon(host="127.0.0.1", port=19002)
daemon.register_handler("my_task", MyHandler())
asyncio.run(daemon.start())
The daemon listens on TCP (host, port) and processes newline-delimited
JSON task messages. Send "PING\\n" to receive "PONG\\n".
"""
DEFAULT_HOST = "127.0.0.1"
DEFAULT_PORT = 19002
def __init__(
self,
host: str = DEFAULT_HOST,
port: int = DEFAULT_PORT,
) -> None:
self._host = host
self._port = port
self._handlers: dict[str, DaemonHandler] = {}
self._server: asyncio.Server | None = None
self._stop_event: asyncio.Event | None = None
self._started_at: str | None = None
self._active_connections: set[asyncio.Task[None]] = set()
# Register built-in handlers
self.register_handler("echo", EchoHandler())
# ------------------------------------------------------------------
# Public API
# ------------------------------------------------------------------
def register_handler(self, task_type: str, handler: DaemonHandler) -> None:
"""
Register a handler for a specific task type.
Overwrites any existing handler for that type.
"""
if task_type in self._handlers:
logger.warning("Overwriting existing handler for task type '%s'", task_type)
self._handlers[task_type] = handler
logger.info("Registered handler for task type '%s'", task_type)
def unregister_handler(self, task_type: str) -> None:
"""Remove handler for a task type."""
self._handlers.pop(task_type, None)
async def start(self) -> None:
"""
Start the daemon and block until shutdown is requested.
Installs SIGTERM/SIGINT handlers for graceful shutdown.
"""
self._stop_event = asyncio.Event()
self._started_at = datetime.now(timezone.utc).isoformat()
# Register status handler (needs reference to self)
self.register_handler("status", StatusHandler(self))
# Install signal handlers (Unix only; skip on Windows)
loop = asyncio.get_running_loop()
if sys.platform != "win32":
for sig in (signal.SIGTERM, signal.SIGINT):
loop.add_signal_handler(sig, self._request_shutdown)
else:
# On Windows use a KeyboardInterrupt task wrapper instead
loop.run_until_complete # no-op reference; signal handled via exception
self._server = await asyncio.start_server(
self._handle_client,
host=self._host,
port=self._port,
)
addr = self._server.sockets[0].getsockname()
logger.info("Sovereign daemon listening on %s:%s", addr[0], addr[1])
async with self._server:
try:
await self._stop_event.wait()
except (KeyboardInterrupt, asyncio.CancelledError):
pass
await self.stop()
async def stop(self) -> None:
"""Graceful shutdown: close server and drain active connections."""
logger.info("Daemon shutting down…")
if self._server is not None:
self._server.close()
try:
await asyncio.wait_for(self._server.wait_closed(), timeout=5.0)
except asyncio.TimeoutError:
pass
# Cancel and await all active connection tasks
if self._active_connections:
for task in list(self._active_connections):
task.cancel()
await asyncio.gather(*self._active_connections, return_exceptions=True)
self._active_connections.clear()
logger.info("Daemon stopped.")
# ------------------------------------------------------------------
# Internal helpers
# ------------------------------------------------------------------
def _request_shutdown(self) -> None:
"""Signal handler callback — sets the stop event."""
logger.info("Shutdown signal received.")
if self._stop_event is not None:
self._stop_event.set()
async def _handle_client(
self,
reader: asyncio.StreamReader,
writer: asyncio.StreamWriter,
) -> None:
"""Called by asyncio.start_server for each new connection."""
conn = _ClientConnection(reader, writer, self._dispatch)
task = asyncio.current_task()
if task is not None:
self._active_connections.add(task)
try:
await conn.run()
finally:
if task is not None:
self._active_connections.discard(task)
async def _dispatch(self, task: DaemonTask) -> DaemonResponse:
"""Route a task to its registered handler."""
handler = self._handlers.get(task.type)
if handler is None:
return DaemonResponse(
task_id=task.task_id,
result={},
error=f"No handler registered for task type '{task.type}'",
)
try:
result = await handler.handle(task)
return DaemonResponse(task_id=task.task_id, result=result)
except Exception as exc:
logger.exception("Handler error for task %s (type=%s)", task.task_id, task.type)
return DaemonResponse(
task_id=task.task_id,
result={},
error=f"Handler raised {type(exc).__name__}: {exc}",
)
# ==========================================
# Convenience: send a single task from client code
# ==========================================
async def send_task(
task_id: str,
task_type: str,
payload: dict[str, Any],
host: str = PythonDaemon.DEFAULT_HOST,
port: int = PythonDaemon.DEFAULT_PORT,
timeout: float = 30.0,
) -> dict[str, Any]:
"""
Send a single task to a running daemon and return the response dict.
Raises:
asyncio.TimeoutError if the daemon does not respond within timeout seconds.
ConnectionRefusedError if the daemon is not running.
ValueError if the daemon returns an error in the response envelope.
"""
reader, writer = await asyncio.wait_for(
asyncio.open_connection(host, port), timeout=timeout
)
try:
msg = json.dumps({"task_id": task_id, "type": task_type, "payload": payload})
writer.write((msg + "\n").encode())
await writer.drain()
raw = await asyncio.wait_for(reader.readline(), timeout=timeout)
response = json.loads(raw)
if response.get("error"):
raise ValueError(f"Daemon error: {response['error']}")
return response["result"]
finally:
writer.close()
try:
await writer.wait_closed()
except Exception:
pass
async def ping_daemon(
host: str = PythonDaemon.DEFAULT_HOST,
port: int = PythonDaemon.DEFAULT_PORT,
timeout: float = 5.0,
) -> bool:
"""
Send PING to daemon. Returns True if daemon responds PONG.
"""
try:
reader, writer = await asyncio.wait_for(
asyncio.open_connection(host, port), timeout=timeout
)
writer.write(b"PING\n")
await writer.drain()
raw = await asyncio.wait_for(reader.readline(), timeout=timeout)
writer.close()
try:
await writer.wait_closed()
except Exception:
pass
return raw.strip() == b"PONG"
except Exception:
return False
# ==========================================
# Entry point (run daemon directly)
# ==========================================
if __name__ == "__main__":
daemon = PythonDaemon()
try:
asyncio.run(daemon.start())
except KeyboardInterrupt:
pass
|