178 lines
7.9 KiB
Python
178 lines
7.9 KiB
Python
"""Business entry point backed by native Pipecat Jobs."""
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import asyncio
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from collections import defaultdict
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from copy import deepcopy
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from uuid import uuid4
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from loguru import logger
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from services.background_tasks.native import NativeTaskRuntime
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from services.background_tasks.opencode import OpenCodeExecutor
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from services.background_tasks.records import TaskRecord, TaskRepository, TERMINAL
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class TaskService:
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def __init__(self, repository=None, executor_factory=OpenCodeExecutor):
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self.repository = repository or TaskRepository()
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self.executor_factory = executor_factory
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self.runtime = None
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self._listeners = defaultdict(set)
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self._jobs = {}
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self._submit_lock = asyncio.Lock()
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self._closing = False
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async def start(self):
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self._closing = False
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self.runtime = NativeTaskRuntime(self._execute, self._cancel_remote, self._on_update, self._on_result)
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await self.runtime.start()
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for record in await self.repository.list(active=True):
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if record.remote_handle:
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await self._dispatch(record)
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else:
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await self.repository.patch(record.id, status="unknown", summary="服务曾中断，未自动重新提交；请核查远端后再创建任务")
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async def close(self):
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self._closing = True
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if self.runtime:
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await self.runtime.close()
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self.runtime = None
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self._listeners.clear()
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async def submit(self, *, assistant_id, conversation_id, tool, instruction, invocation_id):
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if not self.runtime:
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raise ValueError("后台任务服务尚未启动")
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text = instruction.strip()
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if not text or len(text) > 12000:
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raise ValueError("任务指令必须为 1-12000 个字符")
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if tool.type != "task":
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raise ValueError("请选择后台任务工具")
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async with self._submit_lock:
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record = await self.repository.create(TaskRecord(
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id="task_" + uuid4().hex,
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assistant_id=assistant_id, conversation_id=conversation_id,
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tool_id=tool.id, instruction=text,
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origin_key=f"{conversation_id}:{invocation_id}"[:256],
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connection=deepcopy(tool.definition["config"]), secrets=deepcopy(tool.secrets),
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))
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if not record.job_id and record.status == "queued":
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await self._dispatch(record)
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return record.public()
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async def _dispatch(self, record):
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job_id = await self.runtime.submit(record.id, record.connection.get("timeout_seconds", 600))
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self._jobs[job_id] = record.id
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await self.repository.patch(record.id, job_id=job_id)
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async def get(self, task_id, assistant_id=None):
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record = await self.repository.get(task_id)
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if not record or (assistant_id and record.assistant_id != assistant_id):
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raise ValueError("任务不存在或不属于当前助手")
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return record
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def subscribe(self, conversation_id, listener):
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self._listeners[conversation_id].add(listener)
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def detach():
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self._listeners[conversation_id].discard(listener)
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if not self._listeners[conversation_id]:
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self._listeners.pop(conversation_id, None)
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return detach
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async def _save(self, task_id, **changes):
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record = await self.repository.patch(task_id, **changes)
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for listener in tuple(self._listeners.get(record.conversation_id, ())):
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try:
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await listener(record.public())
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except Exception:
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logger.warning("任务通知未送达，结果仍可查询: {}", task_id)
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return record
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async def _execute(self, message, worker):
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task_id = message.payload["task_id"]
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self._jobs[message.job_id] = task_id
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record = await self.get(task_id)
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executor = self.executor_factory(record.connection, record.secrets)
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resume = bool(record.remote_handle)
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try:
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if not resume:
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handle = await executor.prepare()
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record = await self.repository.patch(task_id, remote_handle=handle)
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async def emit(event):
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await self.repository.patch(task_id, **event)
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await worker.send_job_update(message.job_id, {"task_id": task_id})
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# Reconnect only observations; never repeat a mutating prompt.
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for attempt in range(5):
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try:
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result = await executor.run(record.remote_handle, record.instruction, emit, resume=resume)
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await self.repository.patch(task_id, **result, input_request={})
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return {"task_id": task_id}
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except asyncio.CancelledError:
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raise
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except Exception:
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resume = True
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await emit({"summary": "远端连接中断，正在核查任务状态"})
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if attempt == 4:
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raise
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await asyncio.sleep(min(2 ** attempt, 10))
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except asyncio.CancelledError:
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raise
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except Exception:
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await self.repository.patch(task_id, status="unknown", summary="无法确认远端执行状态，请检查远端服务；不会自动重复提交")
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return {"task_id": task_id}
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async def _on_update(self, message):
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task_id = (message.update or {}).get("task_id")
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if task_id:
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record = await self.get(task_id)
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await self._save(task_id, summary=record.summary)
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async def _on_result(self, message):
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if self._closing:
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return
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task_id = self._jobs.pop(message.job_id, None)
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if not task_id:
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return
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record = await self.get(task_id)
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if record.status not in TERMINAL and str(message.status) in {"error", "failed"}:
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await self._save(task_id, status="unknown", summary="任务运行中断，请核查远端状态")
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else:
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await self._save(task_id, summary=record.summary)
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async def cancel(self, task_id, assistant_id=None):
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record = await self.get(task_id, assistant_id)
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if record.status in TERMINAL:
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return record.public()
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await self._save(task_id, status="cancel_requested", summary="正在请求远端停止")
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accepted = bool(self.runtime and record.job_id and await self.runtime.cancel(record.job_id))
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if not accepted:
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await self._stop_record(record)
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return (await self.get(task_id)).public()
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async def _cancel_remote(self, message):
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task_id = self._jobs.get(message.job_id)
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if not task_id or self._closing:
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return
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await self._stop_record(await self.get(task_id))
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async def _stop_record(self, record):
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if record.status in TERMINAL:
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return
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if not record.remote_handle:
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await self._save(record.id, status="unknown", summary="尚无远端句柄，无法确认是否已停止")
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return
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try:
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stopped = await self.executor_factory(record.connection, record.secrets).cancel(record.remote_handle)
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except Exception:
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stopped = False
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await self._save(record.id, status="cancelled" if stopped else "cancel_requested", summary="远端已停止" if stopped else "停止尚未确认，请检查远端服务")
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async def send_input(self, task_id, value, assistant_id=None):
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record = await self.get(task_id, assistant_id)
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if record.status != "waiting_input" or not record.input_request:
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raise ValueError("任务当前没有待处理的确认或问题")
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await self.executor_factory(record.connection, record.secrets).send_input(record.input_request, value)
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await self._save(task_id, status="running", summary="已发送回复，等待远端继续", input_request={})
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return (await self.get(task_id)).public()
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task_service = TaskService()
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