支持fastapi服务
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puke
puke
9
api/tasks/__init__.py
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9
api/tasks/__init__.py
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"""
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Task management for async operations
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"""
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from api.tasks.models import Task, TaskStatus, TaskType
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from api.tasks.manager import task_manager
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__all__ = ["Task", "TaskStatus", "TaskType", "task_manager"]
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254
api/tasks/manager.py
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254
api/tasks/manager.py
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"""
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Task Manager
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In-memory task management for video generation jobs.
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"""
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import asyncio
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import uuid
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from datetime import datetime, timedelta
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from typing import Dict, List, Optional, Callable
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from loguru import logger
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from api.tasks.models import Task, TaskStatus, TaskType, TaskProgress
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from api.config import api_config
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class TaskManager:
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"""
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Task manager for handling async video generation tasks
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Features:
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- In-memory storage (can be replaced with Redis later)
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- Task lifecycle management
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- Progress tracking
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- Auto cleanup of old tasks
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"""
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def __init__(self):
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self._tasks: Dict[str, Task] = {}
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self._task_futures: Dict[str, asyncio.Task] = {}
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self._cleanup_task: Optional[asyncio.Task] = None
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self._running = False
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async def start(self):
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"""Start task manager and cleanup scheduler"""
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if self._running:
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logger.warning("Task manager already running")
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return
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self._running = True
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self._cleanup_task = asyncio.create_task(self._cleanup_loop())
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logger.info("✅ Task manager started")
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async def stop(self):
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"""Stop task manager and cancel all tasks"""
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self._running = False
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# Cancel cleanup task
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if self._cleanup_task:
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self._cleanup_task.cancel()
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try:
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await self._cleanup_task
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except asyncio.CancelledError:
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pass
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# Cancel all running tasks
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for task_id, future in self._task_futures.items():
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if not future.done():
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future.cancel()
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logger.info(f"Cancelled task: {task_id}")
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self._tasks.clear()
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self._task_futures.clear()
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logger.info("✅ Task manager stopped")
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def create_task(
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self,
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task_type: TaskType,
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request_params: Optional[dict] = None
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) -> Task:
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"""
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Create a new task
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Args:
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task_type: Type of task
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request_params: Original request parameters
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Returns:
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Created task
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"""
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task_id = str(uuid.uuid4())
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task = Task(
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task_id=task_id,
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task_type=task_type,
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status=TaskStatus.PENDING,
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request_params=request_params,
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)
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self._tasks[task_id] = task
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logger.info(f"Created task {task_id} ({task_type})")
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return task
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async def execute_task(
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self,
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task_id: str,
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coro_func: Callable,
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*args,
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**kwargs
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):
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"""
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Execute task asynchronously
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Args:
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task_id: Task ID
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coro_func: Async function to execute
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*args: Positional arguments
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**kwargs: Keyword arguments
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"""
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task = self._tasks.get(task_id)
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if not task:
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logger.error(f"Task {task_id} not found")
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return
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# Create async task
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async def _execute():
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try:
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task.status = TaskStatus.RUNNING
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task.started_at = datetime.now()
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logger.info(f"Task {task_id} started")
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# Execute the actual work
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result = await coro_func(*args, **kwargs)
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# Update task with result
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task.status = TaskStatus.COMPLETED
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task.result = result
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task.completed_at = datetime.now()
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logger.info(f"Task {task_id} completed")
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except Exception as e:
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task.status = TaskStatus.FAILED
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task.error = str(e)
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task.completed_at = datetime.now()
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logger.error(f"Task {task_id} failed: {e}")
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# Start execution
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future = asyncio.create_task(_execute())
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self._task_futures[task_id] = future
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def get_task(self, task_id: str) -> Optional[Task]:
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"""Get task by ID"""
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return self._tasks.get(task_id)
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def list_tasks(
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self,
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status: Optional[TaskStatus] = None,
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limit: int = 100
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) -> List[Task]:
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"""
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List tasks with optional filtering
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Args:
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status: Filter by status
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limit: Maximum number of tasks to return
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Returns:
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List of tasks
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"""
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tasks = list(self._tasks.values())
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if status:
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tasks = [t for t in tasks if t.status == status]
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# Sort by created_at descending
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tasks.sort(key=lambda t: t.created_at, reverse=True)
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return tasks[:limit]
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def update_progress(
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self,
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task_id: str,
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current: int,
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total: int,
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message: str = ""
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):
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"""
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Update task progress
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Args:
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task_id: Task ID
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current: Current progress
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total: Total steps
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message: Progress message
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"""
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task = self._tasks.get(task_id)
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if not task:
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return
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percentage = (current / total * 100) if total > 0 else 0
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task.progress = TaskProgress(
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current=current,
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total=total,
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percentage=percentage,
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message=message
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)
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def cancel_task(self, task_id: str) -> bool:
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"""
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Cancel a running task
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Args:
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task_id: Task ID
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Returns:
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True if cancelled, False otherwise
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"""
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task = self._tasks.get(task_id)
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if not task:
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return False
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# Cancel future if running
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future = self._task_futures.get(task_id)
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if future and not future.done():
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future.cancel()
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# Update task status
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task.status = TaskStatus.CANCELLED
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task.completed_at = datetime.now()
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logger.info(f"Cancelled task {task_id}")
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return True
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async def _cleanup_loop(self):
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"""Periodically clean up old completed tasks"""
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while self._running:
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try:
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await asyncio.sleep(api_config.task_cleanup_interval)
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self._cleanup_old_tasks()
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except asyncio.CancelledError:
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break
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except Exception as e:
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logger.error(f"Error in cleanup loop: {e}")
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def _cleanup_old_tasks(self):
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"""Remove old completed/failed tasks"""
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cutoff_time = datetime.now() - timedelta(seconds=api_config.task_retention_time)
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tasks_to_remove = []
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for task_id, task in self._tasks.items():
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if task.status in [TaskStatus.COMPLETED, TaskStatus.FAILED, TaskStatus.CANCELLED]:
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if task.completed_at and task.completed_at < cutoff_time:
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tasks_to_remove.append(task_id)
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for task_id in tasks_to_remove:
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del self._tasks[task_id]
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if task_id in self._task_futures:
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del self._task_futures[task_id]
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if tasks_to_remove:
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logger.info(f"Cleaned up {len(tasks_to_remove)} old tasks")
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# Global task manager instance
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task_manager = TaskManager()
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58
api/tasks/models.py
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58
api/tasks/models.py
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@@ -0,0 +1,58 @@
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"""
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Task data models
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"""
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from datetime import datetime
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from enum import Enum
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from typing import Any, Optional
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from pydantic import BaseModel, Field
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class TaskStatus(str, Enum):
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"""Task status"""
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PENDING = "pending"
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RUNNING = "running"
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COMPLETED = "completed"
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FAILED = "failed"
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CANCELLED = "cancelled"
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class TaskType(str, Enum):
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"""Task type"""
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VIDEO_GENERATION = "video_generation"
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class TaskProgress(BaseModel):
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"""Task progress information"""
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current: int = 0
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total: int = 0
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percentage: float = 0.0
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message: str = ""
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class Task(BaseModel):
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"""Task model"""
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task_id: str
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task_type: TaskType
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status: TaskStatus = TaskStatus.PENDING
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# Progress tracking
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progress: Optional[TaskProgress] = None
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# Result
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result: Optional[Any] = None
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error: Optional[str] = None
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# Metadata
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created_at: datetime = Field(default_factory=datetime.now)
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started_at: Optional[datetime] = None
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completed_at: Optional[datetime] = None
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# Request parameters (for reference)
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request_params: Optional[dict] = None
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class Config:
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json_encoders = {
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datetime: lambda v: v.isoformat()
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}
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