Update the celery configuration and tasks (#458)

* Update the celery configuration and tasks

* fix message notifications

backend/app/task/celery_task/base.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from celery import Task
+from sqlalchemy.exc import SQLAlchemyError
+
+from backend.app.task.conf import task_settings
+from backend.common.socketio.actions import task_notification
+
+
+class TaskBase(Task):
+    """任务基类"""
+
+    autoretry_for = (SQLAlchemyError,)
+    max_retries = task_settings.CELERY_TASK_MAX_RETRIES
+
+    async def before_start(self, task_id, args, kwargs):
+        await task_notification(msg=f'任务 {task_id} 开始执行')
+
+    async def on_success(self, retval, task_id, args, kwargs):
+        await task_notification(msg=f'任务 {task_id} 执行成功')
+
+    async def on_failure(self, exc, task_id, args, kwargs, einfo):
+        await task_notification(msg=f'任务 {task_id} 执行失败')