Pine
4d4d38fe0f
迁自 park-desktop/backend/app：config(数据目录→serverdata/park)/storage/sim_engine/ mqtt/event_bus + 精简 routers(health/settings/config/dashboard/park/companies/display/ events) + app.py 子应用(lifespan 起 MQTT hub+tick 线程, include_router prefix=/park)。 dispatcher.py 增 ROUTE_PARK_PREFIX + _prefix_app，与 app.training(/api)、app.main 分流。 pyproject 增 paho-mqtt(MQTT 必需)。AI/知识库/语音/视觉重模块延后全量迁入。
45 lines
1.0 KiB
Python
45 lines
1.0 KiB
Python
# -*- coding: utf-8 -*-
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"""SSE 事件总线 —— 兼容旧通道（前端 MQTT 不可用时回退）
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所有 MQTT 控制指令同时推送到 SSE /api/events
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"""
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import asyncio
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import json
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class EventBus:
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def __init__(self):
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self._queues = set()
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self._loop = None
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def set_loop(self, loop):
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self._loop = loop
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def subscribe(self):
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q = asyncio.Queue(maxsize=256)
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self._queues.add(q)
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return q
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def unsubscribe(self, q):
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self._queues.discard(q)
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def emit(self, payload: dict):
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"""线程安全：从任意线程广播事件"""
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if not self._loop:
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return
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try:
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asyncio.run_coroutine_threadsafe(self._emit(payload), self._loop)
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except Exception: # noqa: BLE001
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pass
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async def _emit(self, payload):
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data = json.dumps(payload, ensure_ascii=False)
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for q in list(self._queues):
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try:
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q.put_nowait(data)
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except asyncio.QueueFull:
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pass
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bus = EventBus()
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