celery实际应用例子

Celery例子

目录

 

 setting

'''
celery配置
'''
task_acks_late = True
worker_prefetch_multiplier = 1
# 限制最大使用内存，限制celery执行10个任务，就销毁重建
worker_max_memory_per_child = 150000
task_reject_on_worker_lost = True
broker_pool_limit = 300
timezone = "Asia/Shanghai"
broker_url = 'amqp://guest:guest@localhost:5672/{vhost}?heartbeat=0'

# 优先级参数必须加
celery_acks_late = True
celeryd_prefetch_multiplier = 1

task文件

import time
from celery import Celery
from celery1 import celery_setting
from kombu import Exchange, Queue

app = Celery('celery1.my_task')
app.config_from_object(celery_setting)
app.conf.update(
    broker_url="amqp://guest:guest@localhost:5672/{vhost}?heartbeat=0".format(vhost="test")
)

# 1） x-max-length 提供一个非负整数值来设置最大消息条数。
# 2） x-max-length-bytes 提供一个非负整数值，设置最大字节长度。如果设置了两个参数，那么两个参数都将适用；无论先达到哪个限制，都将强制执行。
# 3） x-overflow 提供字符串值来设置。可能的值是：
#     drop-head (默认值）：从队列前面丢弃或 dead-letter 消息，保存后n条消息
#     reject-publish：最近发布的消息将被丢弃，即保存前n条消息。
# 4） x-max-priority 提供一个非负整数值来设置最大优先级。

app.conf.task_queues = [
    Queue('priority_test_1', Exchange('default', type='direct'), routing_key='default', durable=False,
          queue_arguments={'x-max-priority': 10, "x-max-length": 10, "x-max-length-bytes": 1000,
                           "x-overflow": "drop-head", "durable": False}),
    Queue('priority_test_2', Exchange('default', type='direct'), routing_key='default', durable=False,
          queue_arguments={'x-max-priority': 10, "x-max-length": 10, "x-max-length-bytes": 1000,
                           "x-overflow": "drop-head"}),

]


@app.task(bind=True,
          queue='priority_test_1',  # 指定队列名
          max_retries=10,  # 最大重试
          default_retry_delay=600,  # 重试间隔时间
          autoretry_for=(TypeError, KeyError)  # 指定重试错误
          )
def priority_test_1(self, data):
    # print(self)
    print(data)


# celery worker -A celery1.my_task  -n priority_test_1 -Q  priority_test_1 -c 1  -l info  -P gevent

@app.task(bind=True,
          queue='priority_test_2',
          )
def priority_test_2(self, data):
    try:
        print(data["1"])
        time.sleep(2)
    except (TypeError, KeyError) as exc:
        raise self.retry(exc=exc, countdown=60 * 5, max_retries=5)

# celery worker -A celery1.my_task  -n priority_test_2 -Q  priority_test_2 -c 1  -l info  -P gevent

添加任务文件

from Test.celery1.my_task import priority_test_1, priority_test_2

for i in range(10):
    print(i)
    priority_test_1.s({"name": f"{j}"}).apply_async(priority=i)
    priority_test_2.s({"name": f"{j}"}).apply_async(priority=i)