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README
Apache-2.0

DelayQ

License

介绍

基于 Redis & 数据库 的延时队列中间件,采用 Java 开发,支持延时调用 RESTful 服务。

参考 有赞延迟队列设计 中的部分设计进行的设计和实现。

首页

软件架构

  • Job Pool用来存放所有Job的元信息。
  • Delay Bucket是十组以时间为维度的有序队列,以Job Id判定存入指定Bucket,用来存放所有需要延时的Job Id。
  • Timer负责实时扫描各个Bucket,并将delay时间大于等于当前时间的Job放入到对应的Ready Queue。
  • Ready Queue按照任务的类型(Topic)执行相关操作,完成后将任务状态回写进Job Pool。

架构

环境依赖

  • Java 1.8+
  • Redis
  • 数据库(使用PostgreSQL开发,理论上兼容Oracle、Mysql、MariaDB)

使用说明

部署项目
  • 创建表
-- PostgreSQL
CREATE TABLE tb_delayq_job (
	id int8 NOT NULL,
	topic varchar(50) NULL,
	delay int4 NULL,
	ttr int4 NULL,
	body varchar(1000) NULL,
	status varchar(10) NULL,
	execution_time int8 NULL,
	create_time int8 NULL,
	CONSTRAINT pk_tb_delayq_job_id PRIMARY KEY (id)
);

-- Oracle
CREATE TABLE tb_delayq_job (
	id NUMBER(18) NOT NULL,
	topic VARCHAR2(50) NULL,
	delay NUMBER(8) NULL,
	ttr NUMBER(8) NULL,
	body VARCHAR2(1000) NULL,
	status VARCHAR2(10) NULL,
	execution_time NUMBER(20) NULL,
	create_time NUMBER(20) NULL,
	CONSTRAINT pk_tb_delayq_job_id PRIMARY KEY (id)
);
创建任务
  • 发起Post请求
URL:
http://172.16.6.202:16996/delay-q/add?topic=任务类型&delay=等待时间&ttr=超时时间

Post Param

参数名 名称 必填 参考 备注
topic 任务类型 HttpPostTask 目前只支持发起Post请求
delay 等待时间 60 单位(s)
ttr 超时时间 10 单位(s)

Post Body

参数名 名称 必填 参考 备注
url 远端服务URL
headers 头文件
body PostBody
passrule 任务通过规则 "code": "1" 通过识别远端服务返回值 来确认任务是否成功
{
    "url": "http://172.16.6.202:16996/delay-q/add?topic=PrintTask&delay=10&ttr=10",
    "headers": {
        "Content-Type": "application/json"
    },
    "body": "",
    "passrule": {
        "code": "1"
    }
}

PostTask

参与贡献

  1. Fork 本仓库
  2. 新建 feature_xxx 分支
  3. 提交代码
  4. 新建 Pull Request

未来计划

  • 完善多实例部署时 多Timeer同时扫描造成的资源消耗
  • 增加更多请求方式
  • 完善界面功能
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简介

基于 Redis & 数据库 的延时队列 展开 收起
Java
Apache-2.0
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