如何在SpringBoot中使用ElaticJob定时器?相信很多没有经验的人对此束手无策,为此本文总结了问题出现的原因和解决方法,通过这篇文章希望你能解决这个问题。

成都创新互联公司专注于鄂尔多斯网站建设服务及定制,我们拥有丰富的企业做网站经验。 热诚为您提供鄂尔多斯营销型网站建设,鄂尔多斯网站制作、鄂尔多斯网页设计、鄂尔多斯网站官网定制、微信小程序定制开发服务,打造鄂尔多斯网络公司原创品牌,更为您提供鄂尔多斯网站排名全网营销落地服务。
POM文件配置
4.0.0 com.example demojob 0.0.1-SNAPSHOT jar demojob Demo project for Spring Boot org.springframework.boot spring-boot-starter-parent 2.0.2.RELEASE UTF-8 UTF-8 1.8 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test elastic-job-common-core com.dangdang 2.1.5 elastic-job-lite-core com.dangdang 2.1.5 elastic-job-lite-spring com.dangdang 2.1.5 elastic-job-cloud-executor com.dangdang 2.1.5 org.mariadb.jdbc mariadb-java-client 1.5.4 com.alibaba druid-spring-boot-starter 1.1.9 com.baomidou mybatisplus-spring-boot-starter 1.0.5 com.baomidou mybatis-plus 2.1.9 org.springframework.boot spring-boot-maven-plugin
yaml文件配置(也可以用application.properties一样的)
# 配置配置数据源 spring: datasource: type: com.alibaba.druid.pool.DruidDataSource driver-class-name: org.mariadb.jdbc.Driver name: elastic-job-event url: jdbc:mariadb://127.0.0.1:3306/elasticjob username: root password: 123456 druid: validationQuery: SELECT 1 initialSize: 10 minIdle: 10 maxActive: 200 minEvictableIdleTimeMillis: 180000 testOnBorrow: false testWhileIdle: true removeAbandoned: true removeAbandonedTimeout: 1800 logAbandoned: true poolPreparedStatements: true maxOpenPreparedStatements: 100 # 配置Zookeeper regCenter: serverList: localhost:2181 namespace: hulk_order_task # 配置定时器规则 simpleJob: cron: 0/5 * * * * ? shardingTotalCount: 1 shardingItemParameters: 0=1
开始写代码
RegistryCenterConfig
package com.example.demojob.config;
import com.dangdang.ddframe.job.reg.zookeeper.ZookeeperConfiguration;
import com.dangdang.ddframe.job.reg.zookeeper.ZookeeperRegistryCenter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* 注册中心配置
* 用于注册和协调作业分布式行为的组件,目前仅支持Zookeeper。
* @author shudalei
*/
@Configuration
@ConditionalOnExpression("'${regCenter.serverList}'.length() > 0")
public class RegistryCenterConfig {
@Bean(initMethod = "init")
public ZookeeperRegistryCenter regCenter(@Value("${regCenter.serverList}") final String serverList,
@Value("${regCenter.namespace}") final String namespace) {
return new ZookeeperRegistryCenter(new ZookeeperConfiguration(serverList, namespace));
}
}JobEventConfig
package com.example.demojob.config;
import com.dangdang.ddframe.job.event.JobEventConfiguration;
import com.dangdang.ddframe.job.event.rdb.JobEventRdbConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.annotation.Resource;
import javax.sql.DataSource;
/**
* 如果想把作业运行的内容写到DB中,我们需要用到另一个构造器,
* 同时定义自己的JobEventConfiguration,
* 目前来说实现这个接口的只有一个类JobEventRdbConfiguration,
* 通过这个可以将作业运行的痕迹进行持久化到DB的操作。
* @author shudalei
*/
@Configuration
public class JobEventConfig {
@Resource
private DataSource dataSource;
@Bean
public JobEventConfiguration jobEventConfiguration() {
return new JobEventRdbConfiguration(dataSource);
}
}SimpleJobConfig
package com.example.demojob.config;
import com.dangdang.ddframe.job.config.JobCoreConfiguration;
import com.dangdang.ddframe.job.config.simple.SimpleJobConfiguration;
import com.dangdang.ddframe.job.event.JobEventConfiguration;
import com.dangdang.ddframe.job.lite.api.JobScheduler;
import com.dangdang.ddframe.job.lite.config.LiteJobConfiguration;
import com.dangdang.ddframe.job.lite.spring.api.SpringJobScheduler;
import com.dangdang.ddframe.job.reg.zookeeper.ZookeeperRegistryCenter;
import com.example.demojob.job.TestSimpleJob;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.annotation.Resource;
@Configuration
public class SimpleJobConfig {
/**
* 注册中心
*/
@Resource
private ZookeeperRegistryCenter regCenter;
/**
* job事件配置
*/
@Resource
private JobEventConfiguration jobEventConfiguration;
/**
* 微信access token获取任务对象
*
*/
@Resource
private TestSimpleJob simpleJob;
/**
*
* @param cron 定时任务cron配置
* @param shardingTotalCount 任务分片数
* @param shardingItemParameters 任务分片参数
* @return JobScheduler 任务调度器
*/
@Bean(initMethod = "init")
public JobScheduler simpleJobScheduler(@Value("${simpleJob.cron}") final String cron,
@Value("${simpleJob.shardingTotalCount}") final int shardingTotalCount,
@Value("${simpleJob.shardingItemParameters}") final String shardingItemParameters) {
return new SpringJobScheduler(simpleJob, regCenter,
getLiteJobConfiguration(simpleJob.getClass(), cron, shardingTotalCount, shardingItemParameters),
jobEventConfiguration);
}
/**
*
* @param jobClass 任务调度类
* @param cron 定时任务cron配置
* @param shardingTotalCount 任务分片数
* @param shardingItemParameters 任务分片参数
* @return LiteJobConfiguration 任务配置
*/
private LiteJobConfiguration getLiteJobConfiguration(final Class extends com.dangdang.ddframe.job.api.simple.SimpleJob> jobClass, final String cron,
final int shardingTotalCount, final String shardingItemParameters) {
return LiteJobConfiguration
.newBuilder(
new SimpleJobConfiguration(JobCoreConfiguration.newBuilder(jobClass.getName(), cron, shardingTotalCount)
.shardingItemParameters(shardingItemParameters).build(), jobClass.getCanonicalName()))
.overwrite(true).build();
}
}TestSimpleJob,定时器任务本身
package com.example.demojob.job;
import com.dangdang.ddframe.job.api.ShardingContext;
import com.dangdang.ddframe.job.api.simple.SimpleJob;
import org.springframework.stereotype.Component;
@Component
public class TestSimpleJob implements SimpleJob {
private int count;
//任务就是每5秒执行一次控制台输出1,2,3……
@Override
public void execute(ShardingContext shardingContext) {
count++;
System.out.println("task " + count);
}
}最后在Docker下安装 Zookeeper
安装脚本compose文件如下
version: '2' services: zookeeper01: image: zookeeper restart: always hostname: zookeeper01 ports: - 2181:2181 environment: ZOO_MY_ID: 1 ZOO_SERVERS: server.1=0.0.0.0:2888:3888 server.2=zookeeper02:2888:3888 server.3=zookeeper03:2888:3888 zookeeper02: image: zookeeper restart: always hostname: zookeeper02 ports: - 2182:2181 environment: ZOO_MY_ID: 2 ZOO_SERVERS: server.1=zookeeper01:2888:3888 server.2=0.0.0.0:2888:3888 server.3=zookeeper03:2888:3888 zookeeper03: image: zookeeper restart: always hostname: zookeeper03 ports: - 2183:2181 environment: ZOO_MY_ID: 3 ZOO_SERVERS: server.1=zookeeper01:2888:3888 server.2=zookeeper02:2888:3888 server.3=0.0.0.0:2888:3888
springboot一种全新的编程规范,其设计目的是用来简化新Spring应用的初始搭建以及开发过程,SpringBoot也是一个服务于框架的框架,服务范围是简化配置文件。
看完上述内容,你们掌握如何在SpringBoot中使用ElaticJob定时器的方法了吗?如果还想学到更多技能或想了解更多相关内容,欢迎关注创新互联行业资讯频道,感谢各位的阅读!