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django+xadmin+djcelery实现后台管理定时任务

继上一篇中间表的数据是动态的,图表展示的数据才比较准确。这里用到一个新的模块Djcelery,安装配置步骤如下:

1.安装

redis==2.10.6

celery==3.1.23

django-celery==3.1.17

flower==0.9.2

supervisor==3.3.4

flower用于监控定时任务,supervisor管理进程,可选

2.配置

settings.py中添加以下几行:

#最顶头加上
from __future__ import absolute_import

# celery settings
import djcelery
djcelery.setup_loader()
BROKER_URL = 'redis://localhost:6379'
# BROKER_URL = 'redis://:密码@主机地址:端口号/数据库号'
CELERYBEAT_SCHEDULER = 'djcelery.schedulers.DatabaseScheduler' # 定时任务
CELERY_RESULT_BACKEND = 'djcelery.backends.database:DatabaseBackend'
CELERY_RESULT_BACKEND = 'redis://localhost:6379'
CELERY_ACCEPT_CONTENT = ['application/json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERYD_MAX_TASKS_PER_CHILD = 40
CELERY_TIMEZONE = 'Asia/Shanghai'

INSTALLED_APPS = [
  'djcelery',# 添加djcelery
] 

3.注册定时任务的几个表

from __future__ import absolute_import, unicode_literals
from djcelery.models import (
  TaskState, WorkerState,
  PeriodicTask, IntervalSchedule, CrontabSchedule,
)
from xadmin.sites import site
site.register(IntervalSchedule) # 存储循环任务设置的时间
site.register(CrontabSchedule) # 存储定时任务设置的时间
site.register(PeriodicTask) # 存储任务
site.register(TaskState) # 存储任务执行状态
site.register(WorkerState) # 存储执行任务的worker  

4.主应用下添加celery.py

__init__.py修改如下:

# __init__.py
from __future__ import absolute_import
from .celery import app as celery_app


# celery.py
from __future__ import absolute_import

import os
from celery import Celery, platforms
from django.conf import settings

# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'hermes.settings')

# hermes主应用名
app = Celery('hermes')
platforms.C_FORCE_ROOT = True

app.config_from_object('django.conf:settings')
app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)

@app.task(bind=True)
def debug_task(self):
  print('Request: {0!r}'.format(self.request))  

5.添加任务 应用下添加tasks.py

from __future__ import absolute_import

from celery import task
import time

from .channels import Cache_data_to_redis

# 更新指定日期数据到sms_organizationcount
@task
def readAndWrite(begin,end):
  begin = str(begin)[:4] + '-' + str(begin)[4:6] + '-' + str(begin)[6:8]
  end = str(end)[:4] + '-' + str(end)[4:6] + '-' + str(end)[6:8]
  i = 0
  begin_time = time.time()
  read = Cache_data_to_redis().connection
  Rcursor = read.cursor()
  query = "SELECT id from sms_organizationcount WHERE alia_date_time between '"
  query += begin
  query += "' and '"
  query += end
  query += "'"
  readSql = "SELECT alia_month_time, alia_date_time, count(*) as total_nums, count(t.`status`=2 or null) as error_nums, name FROM \
       (select *, DATE_FORMAT(req_time,'%Y-%m') as alia_month_time, DATE_FORMAT(req_time,'%Y-%m-%d') as alia_date_time, \
       LEFT(body,LOCATE('】',body)) as name from sms_smslog where LOCATE('】',body) >0 \
       and LEFT(body,1)='【' and DATE_FORMAT(req_time,'%Y-%m-%d') between '"
  readSql += begin
  readSql += "' and '"
  readSql += end
  readSql += "')"
  readSql += " as t GROUP BY alia_date_time , name;"
  Rcursor.execute(readSql)
  readResult = Rcursor.fetchall()
  Rcursor.execute(query)
  query_result = Rcursor.fetchall()
  deleteSql = "delete from sms_organizationcount where alia_date_time between '%s' and '%s'" % (begin,end)
  if query_result:
    delete_record = Cache_data_to_redis().connection
    Dcursor = delete_record.cursor()
    Dcursor.execute(deleteSql)
    delete_record.commit()
    delete_record.close()
    for value in readResult:
    write = Cache_data_to_redis().connection
    Wcursor = write.cursor()
    writeSql = "INSERT into sms_organizationcount (alia_month_time, alia_date_time, total_nums, error_nums, `name`) " \
          " VALUES ('%s', '%s', '%s', '%s', '%s' )" %\
          (value['alia_month_time'], value['alia_date_time'], value['total_nums'], value['error_nums'], value['name'])
    try:
      Wcursor.execute(writeSql)
      i += 1
      write.commit()
    except:
      write.rollback()
    write.close()
  read.close()
  end_time = time.time()
  pass_time = end_time - begin_time
  return i, pass_time 

6.最终效果如下图:

7.终端启动celery命令:

# 查看注册的task
celery -A hermes inspect registered
# 启动
python manage.py celery -A django_celery_demo worker -B  # django_celery_demo为celery和setting所在文件夹名

#celery_beat起不来
# 动态的输出启动进程时的输出
supervisorctl tail programname stdout


# flower监控celery
python manage.py celery flower
ip:5555 

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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