| 1 | import json |
| 2 | from typing import Dict |
| 3 | |
| 4 | import redis |
| 5 | |
| 6 | from app.controllers.manager.base_manager import TaskManager |
| 7 | from app.models.schema import VideoParams |
| 8 | from app.services import task as tm |
| 9 | |
| 10 | FUNC_MAP = { |
| 11 | "start": tm.start, |
| 12 | # 'start_test': tm.start_test |
| 13 | } |
| 14 | |
| 15 | |
| 16 | class RedisTaskManager(TaskManager): |
| 17 | def __init__( |
| 18 | self, |
| 19 | max_concurrent_tasks: int, |
| 20 | redis_url: str, |
| 21 | max_queued_tasks: int = 100, |
| 22 | ): |
| 23 | self.redis_client = redis.Redis.from_url(redis_url) |
| 24 | super().__init__(max_concurrent_tasks, max_queued_tasks=max_queued_tasks) |
| 25 | |
| 26 | def create_queue(self): |
| 27 | return "task_queue" |
| 28 | |
| 29 | def enqueue(self, task: Dict): |
| 30 | task_with_serializable_params = task.copy() |
| 31 | |
| 32 | if "params" in task["kwargs"] and isinstance( |
| 33 | task["kwargs"]["params"], VideoParams |
| 34 | ): |
| 35 | task_with_serializable_params["kwargs"]["params"] = task["kwargs"][ |
| 36 | "params" |
| 37 | ].dict() |
| 38 | |
| 39 | # 将函数对象转换为其名称 |
| 40 | task_with_serializable_params["func"] = task["func"].__name__ |
| 41 | self.redis_client.rpush(self.queue, json.dumps(task_with_serializable_params)) |
| 42 | |
| 43 | def dequeue(self): |
| 44 | task_json = self.redis_client.lpop(self.queue) |
| 45 | if task_json: |
| 46 | task_info = json.loads(task_json) |
| 47 | # 将函数名称转换回函数对象 |
| 48 | task_info["func"] = FUNC_MAP[task_info["func"]] |
| 49 | |
| 50 | if "params" in task_info["kwargs"] and isinstance( |
| 51 | task_info["kwargs"]["params"], dict |
| 52 | ): |
| 53 | task_info["kwargs"]["params"] = VideoParams( |
| 54 | **task_info["kwargs"]["params"] |
| 55 | ) |
| 56 | |
| 57 | return task_info |
| 58 | return None |
| 59 | |
| 60 | def is_queue_empty(self): |
| 61 | return self.redis_client.llen(self.queue) == 0 |
| 62 | |
| 63 | def queue_size(self): |
| 64 | return self.redis_client.llen(self.queue) |
| 65 |