elastic-job分布式任务

项目依赖

    sprintboot项目依赖如下
    <!--框架核心jar包-->
    <dependency>
        <groupId>com.github.kuhn-he</groupId>
        <artifactId>elastic-job-lite-spring-boot-starter</artifactId>
        <version>2.1.5</version>
    </dependency>
    
一般spring项目参见如下      
    <dependency>
      <groupId>com.dangdang</groupId>
      <artifactId>elastic-job-lite-core</artifactId>
      <version>2.1.2</version>
    </dependency>
    <dependency>
      <groupId>com.dangdang</groupId>
      <artifactId>elastic-job-lite-spring</artifactId>
      <version>2.1.2</version>
    </dependency>
    
可以参见此文 
https://blog.csdn.net/u010889990/article/details/80000012
或者
https://blog.csdn.net/xvshu/article/details/80755988 

配置文件

esjob.serverList=127.0.0.2:2181,127.0.0.3:2181,127.0.0.6:2181
esjob.namespace=esjob
esjob.userJob.shardingTotalCount=3
esjob.userJob.shardingItemParameters=0=0,1=1,2=2

Zookeeper配置中心

import com.dangdang.ddframe.job.reg.zookeeper.ZookeeperConfiguration;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

//基于ZK的esjob配置中心
@Configuration
@ConfigurationProperties("esjob")
public class ElasticJobConfig {
    
    private String serverList;
    private String namespace;
    @Bean
    public ZookeeperConfiguration zkConfig() {
        return new ZookeeperConfiguration(serverList, namespace);
    }

    @Bean(initMethod = "init")
    public ZookeeperRegistryCenter regCenter(ZookeeperConfiguration config) {
        return new ZookeeperRegistryCenter(config);
    }
}

SimpleJobConfig配置

import cn.fastcampus.scheduler.DemoSimpleJob;
import com.dangdang.ddframe.job.api.simple.SimpleJob;
import com.dangdang.ddframe.job.config.JobCoreConfiguration;
import com.dangdang.ddframe.job.config.simple.SimpleJobConfiguration;
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 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 {
    @Value("${esjob.userJob.cron}")
    private final String cron;
    @Value("${esjob.userJob.shardingTotalCount}") 
    private final int shardingTotalCount
    @Value("${esjob.userJob.shardingItemParameters}") 
    private final String shardingItemParameters

    @Resource
    private ZookeeperRegistryCenter regCenter;
    
    @Bean
    public DemoSimpleJob simpleJob(){
        return new DemoSimpleJob();
    }

    @Bean(initMethod = "init")
    public JobScheduler simpleJobScheduler(final DemoSimpleJob simpleJob, String cron,int shardingTotalCount,String shardingItemParameters){
        return new SpringJobScheduler(simpleJob, regCenter, getLiteJobConfiguration(simpleJob.getClass(), cron, shardingTotalCount, shardingItemParameters));
    }

    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();
    }
}

定时任务DemoSimpleJob

import cn.cicada.common.metrics.MetricsTimer;
import cn.cicada.common.metrics.MetricsUtil;
import cn.cicada.common.utils.StopWatch;
import com.dangdang.ddframe.job.api.ShardingContext;
import com.dangdang.ddframe.job.api.simple.SimpleJob;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.chain.impl.ContextBase;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.CollectionUtils;

import java.util.List;
import java.util.concurrent.CountDownLatch;

public class DemoSimpleJob implements SimpleJob {
    
   private final Logger log = LoggerFactory.getLogger(DemoSimpleJob.class);
   
   @Autowired
   private UserMapper userMapper;
  

    @Override
    public void execute(ShardingContext shardingContext) {
     
        int totalCount = shardingContext.getShardingTotalCount();
        
        log.info("[logFLag:{}] sharding context [Item:{}][parameter:{}]，", logFlag, shardingContext.getShardingItem(), shardingContext.getShardingParameter());
        
        //dosomething
        List<User> schoolList = userMapper.getUsersByShardingMode(totalCount, Integer.valueOf(shardingContext.getShardingParameter()));
        
        
    }

}

public interface UserMapper {
    
    @Select("select * from t_user where id % #{mode} = #{residue} and status = 0")
    List<User> getUsersByShardingMode(@Param("mode") int mode, @Param("residue") int residue);
    
}