总体思路,要确认一个定时任务需要一个cron表达式+jobDetail;
现在要让实现定时任务的协调,则就让zookeeper,简单说就是需要3要素,zk对象+cron+jobDetail;
1、maven引入依赖
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bus-kafka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-stream-kafka</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
</dependency>
<dependency>
<groupId>com.dangdang</groupId>
<artifactId>elastic-job-lite-core</artifactId>
</dependency>
<dependency>
<groupId>com.dangdang</groupId>
<artifactId>elastic-job-lite-spring</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-access</artifactId>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-recipes</artifactId>
</dependency>
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
application.properties如下:
server.port=8766 spring.application.name=scheduler-service #log logging.config = classpath:logback.xml regCenter.serverList = localhost:2181 regCenter.namespace = elastic-job-lite-springboot stockJob.cron = 0/5 * * * * ? stockJob.shardingTotalCount = 2 stockJob.shardingItemParameters = 0=Chengdu0,1=Chengdu1
其中
stockJob.cron为定时任务的cron表达式;
stockJob.shardingTotalCount为任务的分数量(即同时同时开几个定时任务);
stockJob.shardingItemParameters为任务分片携带的参数;
要素1-zookeeper
创建一个bean,用来配置zk
@Configuration @ConditionalOnExpression("'${regCenter.serverList}'.length() > 0") public class JobRegistryCenterConfig { @Bean(initMethod = "init") public ZookeeperRegistryCenter regCenter(@Value("${regCenter.serverList}") final String serverList, @Value("${regCenter.namespace}") final String namespace) { return new ZookeeperRegistryCenter(new ZookeeperConfiguration(serverList, namespace)); } }
创建一个任务,jobdetail
public class StockSimpleJob implements SimpleJob{ @Autowired private StockMapper stockMapper; @Autowired private StockFlowMapper stockFlowMapper; @Override public void execute(ShardingContext shardingContext) { System.out.println(String.format("------Thread ID: %s, 任务总片数: %s, " + "当前分片项: %s.当前参数: %s,"+ "当前任务名称: %s.当前任务参数: %s" , Thread.currentThread().getId(), shardingContext.getShardingTotalCount(), shardingContext.getShardingItem(), shardingContext.getShardingParameter(), shardingContext.getJobName(), shardingContext.getJobParameter() )); } }
再创建一个类,把3要素连接起来
@Configuration public class StockJobConfig { @Autowired private JobRegistryCenterConfig jobRegistryCenterConfig; @Autowired private ZookeeperRegistryCenter regCenter; @Bean public SimpleJob stockJob(){ return new StockSimpleJob(); } @Bean(initMethod = "init") public JobScheduler simpleJobScheduler(final SimpleJob simpleJob, @Value("${stockJob.cron}") final String cron, @Value("${stockJob.shardingTotalCount}") final int shardingTotalCount, @Value("${stockJob.shardingItemParameters}") final String shardingItemParameters) { return new SpringJobScheduler(simpleJob, regCenter, getLiteJobConfiguration(simpleJob.getClass(), cron, shardingTotalCount, shardingItemParameters)); } /** *@Description 任务配置类 */ private LiteJobConfiguration getLiteJobConfiguration(final Class<? extends 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(); } }
boot任务启动后的效果(需要先启动zk,这里我填了分片数为2)