mix-basic / Delayer
Licence: apache-2.0
🌶️ 基于 Redis 的延迟队列中间件,采用 Golang 开发,支持 PHP、Golang 等多种语言客户端
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Delayer
基于 Redis 的延迟消息队列中间件,采用 Golang 开发,支持 PHP、Golang 等多种语言客户端。
参考 有赞延迟队列设计 中的部分设计,优化后实现。
应用场景
- 订单超过30分钟未支付,自动关闭订单。
- 订单完成后, 如果用户一直未评价, 5天后自动好评。
- 会员到期前3天,短信通知续费。
- 其他针对某个任务,延迟执行功能的需求。
实现原理
- 客户端:push 任务时,任务数据存入 hash 中,jobID 存入 zset 中,pop 时从指定的 list 中取准备好的数据。
- 服务器端:定时使用连接池并行将 zset 中到期的 jobID 放入对应的 list 中,供客户端 pop 取出。
核心特征
- 使用 Golang 开发,高性能。
- 高可用:服务器端操作是原子的,并且做了优雅停止,不会丢失数据,在redis断线时会自动重连。
- 可通过配置文件控制执行性能参数。
- 提供多种语言的 SDK,使用简单快捷。
如何使用
delayer
分为:
- 服务器端:负责定时扫描到期的任务,并放入队列,需在服务器上常驻执行。
- 客户端:在代码中使用,以类库的形式,提供
push
、pop
、bPop
、remove
方法操作任务。
服务器端
在 https://github.com/mix-basic/delayer/releases 中下载对应平台的程序。
支持 windows、linux、mac 三种平台
然后修改配置文件 delayer.conf
:
[delayer]
pid = /var/run/delayer.pid ; 需单例执行时配置, 多实例执行时留空, Win不支持单例
timer_interval = 1000 ; 计算间隔时间, 单位毫秒
access_log = logs/access.log ; 存取日志
error_log = logs/error.log ; 错误日志
[redis]
host = 127.0.0.1 ; 连接地址
port = 6379 ; 连接端口
database = 0 ; 数据库编号
password = ; 密码, 无需密码留空
max_idle = 2 ; 最大空闲连接数
max_active = 20 ; 最大激活连接数
idle_timeout = 3600 ; 空闲连接超时时间, 单位秒
conn_max_lifetime = 3600 ; 连接最大生存时间, 单位秒
查看帮助:
[[email protected] bin]# ./delayer -h
Usage: delayer [options]
Options:
-d/--daemon run in the background
-c/--configuration FILENAME -- configuration file path (searches if not given)
-h/--help -- print this usage message and exit
-v/--version -- print version number and exit
启动:
[[email protected] bin]# ./delayer
____ __
/ __ \___ / /___ ___ _____ _____
/ / / / _ \/ / __ `/ / / / _ \/ ___/
/ /_/ / __/ / /_/ / /_/ / __/ /
/_____/\___/_/\__,_/\__, /\___/_/
/____/
Service: delayer
Version: 1.0.1
[info] 2018/10/21 11:24:24 Service started successfully, PID: 31023
客户端
我们提供了以下几种语言:
根据对应项目的说明使用
- PHP:https://github.com/mix-basic/delayer-client-php
- Golang:https://github.com/mix-basic/delayer-client-golang
- Java:待定
- Python:待定
License
Apache License Version 2.0, http://www.apache.org/licenses/
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