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Elastic-job-lite整合spring-boot与监控平台搭建

本篇文章会对Elastic-job与spring-·boot进行整合，同时搭建任务监控平台通过elastic-job-console以便对任务进行管理，至于涉及到的 分片sharding 及配置项等核心概念可以参考官网文档，本文主要是快速搭建工程，让定时任务先跑起来，文末附源码地址。

二、Elastic-job相关

Elastic-job官网中文 elasticjob.io/index_zh.ht…

github地址 github.com/elasticjob/…

三、搭建定时任务工程

通过Spring Initializr创建boot工程，只需添加web依赖即可，然后添加elastic-job-lite-core核心包

<dependency>
	<groupId>com.dangdang</groupId>
	<artifactId>elastic-job-lite-core</artifactId>
	<version>2.1.5</version>
</dependency>
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与spring整合添加elastic-job-lite-spring包

<dependency>
	<groupId>com.dangdang</groupId>
	<artifactId>elastic-job-lite-spring</artifactId>
	<version>2.1.5</version>
</dependency>
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编写定时任务类MyElasticJob，实现SimpleJob接口

package com.morning.morningshiro.jobs;

import com.dangdang.ddframe.job.api.ShardingContext;
import com.dangdang.ddframe.job.api.simple.SimpleJob;
import com.morning.morningshiro.dao.entity.UserEntity;

import javax.annotation.Resource;
import java.util.List;

public class MyElasticJob implements SimpleJob {

    @Override
    public void execute(ShardingContext context) {
        // 根据分片项执行任务
        System.out.println(context.toString());
        switch (context.getShardingItem()) {
            case 0:
                break;
            case 1:
                // do something by sharding item 1
                break;
            case 2:
                // do something by sharding item 2
                break;
            // case n: ...
        }
    }
}
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任务监听类 JobListener

package com.morning.morningshiro.jobs;

import com.dangdang.ddframe.job.executor.ShardingContexts;
import com.dangdang.ddframe.job.lite.api.listener.ElasticJobListener;

public class JobListener implements ElasticJobListener {
    @Override
    public void beforeJobExecuted(ShardingContexts shardingContexts) {
        System.out.println(shardingContexts.toString());
    }

    @Override
    public void afterJobExecuted(ShardingContexts shardingContexts) {
        System.out.println(shardingContexts.toString());
    }
}
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编写spring-elastic-job.xml文件,放到 resources 文件下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:reg="http://www.dangdang.com/schema/ddframe/reg"
       xmlns:job="http://www.dangdang.com/schema/ddframe/job"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans.xsd
                        http://www.dangdang.com/schema/ddframe/reg
                        http://www.dangdang.com/schema/ddframe/reg/reg.xsd
                        http://www.dangdang.com/schema/ddframe/job
                        http://www.dangdang.com/schema/ddframe/job/job.xsd
                        ">
    <!--配置作业注册中心 -->
    <!--namespace为注册到zk的名称-->
    <reg:zookeeper id="regCenter" server-lists="127.0.0.1:2181" namespace="dd-job" base-sleep-time-milliseconds="1000"
                   max-sleep-time-milliseconds="3000" max-retries="3"/>

    <bean id="myElasticJob" class="com.morning.morningshiro.jobs.MyElasticJob"/>

    <!-- 配置作业-->
    <!--overwrite 修改后覆盖原有定时任务-->
    <!--id 任务ID-->
    <job:simple id="job1" job-ref="myElasticJob" overwrite="true" registry-center-ref="regCenter"
                cron="0/30 * * * * ?" sharding-total-count="4" sharding-item-parameters="0=USER,1=TWO" description="test">
        <job:listener class="com.morning.morningshiro.jobs.JobListener"/>
    </job:simple>
</beans>
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启动类引入xml配置文件

@SpringBootApplication
@ImportResource(locations = {"classpath:spring-elastic-job.xml"})
public class MorningShiroApplication {

	public static void main(String[] args) {
		SpringApplication.run(MorningShiroApplication.class, args);
	}

}
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