先说这个Sharding item parameters ‘1‘ format error, should be int=xx,int=xx异常吧,这是在做动态添加调度任务的时候出现的,网上找了一会没有搜到任何信息,最后发现,是添加任务这个方法里有一个漏洞。
这个源码出自:
1 private ShardingItem parse(final String shardingItemParameter, final String originalShardingItemParameters) { 2 String[] pair = shardingItemParameter.trim().split(KEY_VALUE_DELIMITER); 3 if (2 != pair.length) { 4 throw new JobConfigurationException("Sharding item parameters ‘%s‘ format error, should be int=xx,int=xx", originalShardingItemParameters); 5 } 6 try { 7 return new ShardingItem(Integer.parseInt(pair[0].trim()), pair[1].trim()); 8 } catch (final NumberFormatException ex) { 9 throw new JobConfigurationException("Sharding item parameters key ‘%s‘ is not an integer.", pair[0]); 10 } 11 }
修改前代码(报这个异常的代码):
1 public void addJobScheduler(final Class<? extends SimpleJob> jobClass, 2 final String cron, 3 final int shardingTotalCount, 4 final String shardingItemParameters) { 5 JobCoreConfiguration coreConfig = JobCoreConfiguration.newBuilder(jobClass.getName(), cron, shardingTotalCount).shardingItemParameters(shardingItemParameters).build(); 6 SimpleJobConfiguration simpleJobConfig = new SimpleJobConfiguration(coreConfig, jobClass.getCanonicalName()); 7 JobScheduler jobScheduler = new JobScheduler(regCenter, LiteJobConfiguration.newBuilder(simpleJobConfig).build()); 8 jobScheduler.init(); 9 }
是不是发现不管你怎么设置,都给你报这个,你明明传的就不是1这个参数,还是给你报这个,问题出在build()那里,需要overwrite。修改后:
1 public void addJobScheduler(final Class<? extends SimpleJob> jobClass, 2 final String cron, 3 final int shardingTotalCount, 4 final String shardingItemParameters) { 5 JobCoreConfiguration coreConfig = JobCoreConfiguration.newBuilder(jobClass.getName(), cron, shardingTotalCount).shardingItemParameters(shardingItemParameters).build(); 6 SimpleJobConfiguration simpleJobConfig = new SimpleJobConfiguration(coreConfig, jobClass.getCanonicalName()); 7 JobScheduler jobScheduler = new JobScheduler(regCenter, LiteJobConfiguration.newBuilder(simpleJobConfig).overwrite(true).build()); 8 jobScheduler.init(); 9 }
红色代码为修改后加的代码。
先说说这个dangdang的elastic-job,它是一个分布式任务调度插件。今天我遇到的问题就是,有部分任务,在多节点环境中,不需要每个节点执行,比如只需要一个节点(确切地说就是作业分片总数=1)上运行的任务,这时候elastic-job就是个不错的选择,它可以很灵活的配置作业分片总数等。它的官方文档,链接指向配置说明:http://elasticjob.io/docs/elastic-job-lite/02-guide/config-manual/
那么spring boot中如何集成进它。需要的一个前提条件是zookeeper服务,这个一般项目里都会用到,你只需要连就好了,如果dev或者你们还没用上,可以找个教程安装一下。链接指向在 CentOS7 上安装 Zookeeper服务 。
然后.propertis配置文件(yml类同):
regCenter.serverList=10.0.30.140:2181 regCenter.namespace=elastic-job simpleJob.cron=0/5 * * * * ? # 作业分片总数,设为1只在一个节点执行 simpleJob.shardingTotalCount=1 simpleJob.shardingItemParameters=0=A,1=B,2=C
当然,pom中需要引入elastic-job:
<dependency> <artifactId>elastic-job-common-core</artifactId> <groupId>com.dangdang</groupId> <version>${elastic-job.version}</version> </dependency> <dependency> <artifactId>elastic-job-lite-core</artifactId> <groupId>com.dangdang</groupId> <version>${elastic-job.version}</version> </dependency> <dependency> <artifactId>elastic-job-lite-spring</artifactId> <groupId>com.dangdang</groupId> <version>${elastic-job.version}</version> </dependency> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-test</artifactId> <version>${curator.version}</version> </dependency>
本示例代码用到的版本是:
<elastic-job.version>2.1.5</elastic-job.version> <curator.version>2.10.0</curator.version>
连接zookeeper注册中心:
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; /** * @author binhy *@date 2019-1-22 */ @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)); } }
然后做一个任务信息持久化:
import javax.annotation.Resource; import javax.sql.DataSource; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import com.dangdang.ddframe.job.event.JobEventConfiguration; import com.dangdang.ddframe.job.event.rdb.JobEventRdbConfiguration; /** * @author binhy *@date 2019-1-22 */ @Configuration public class JobEventConfig { @Resource private DataSource dataSource; @Bean public JobEventConfiguration jobEventConfiguration() { return new JobEventRdbConfiguration(dataSource); } }
当你最后运行后会发现你的库里多了两张表job_execution_log和job_status_trace_log他们会详细的记录你的任务执行信息,包括执行ip,开始结束时间等,还是非常不错的。
然后需要一个任务管理类,初始化一些任务,我这里把动态添加任务的方法也写在了这里。因为这种形式需要你一个任务写一个配置和类去实现。动态添加会省很多事。
import com.goopal.exdata.dangdang.DemoJob; import javax.annotation.Resource; import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.ApplicationArguments; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; 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.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; /** * @author binhy * @date 2019-1-22 */ @Configuration public class SimpleJobConfig { @Resource private ZookeeperRegistryCenter regCenter; @Resource private JobEventConfiguration jobEventConfiguration; @Bean public SimpleJob simpleJob() { return new DemoJob(); } @Bean(initMethod = "init") public JobScheduler simpleJobScheduler(final SimpleJob simpleJob, @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); } 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(); } /** * 动态添加 * @param jobClass * @param cron * @param shardingTotalCount * @param shardingItemParameters */ public void addJobScheduler(final Class<? extends SimpleJob> jobClass, final String cron, final int shardingTotalCount, final String shardingItemParameters) { JobCoreConfiguration coreConfig = JobCoreConfiguration.newBuilder(jobClass.getName(), cron, shardingTotalCount).shardingItemParameters(shardingItemParameters).build(); SimpleJobConfiguration simpleJobConfig = new SimpleJobConfiguration(coreConfig, jobClass.getCanonicalName()); JobScheduler jobScheduler = new JobScheduler(regCenter, LiteJobConfiguration.newBuilder(simpleJobConfig).overwrite(true).build()); jobScheduler.init(); } }
到这里,你在配置文件中配置的定时任务就已经可以在多节点环境中,仅在1个节点执行了。需要添加更多的不同cron的任务,只需要在代码业务逻辑处调用即可。如:
@Autowired private SimpleJobConfig simpleJobConfig; @Override public void run(ApplicationArguments args) throws Exception { simpleJobConfig.addJobScheduler(AnalysisData.class,"0/3 * * * * ?",3,"0=A,1=B,2=C");//0=A,1=B,2=C }
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elastic-job集成到springboot教程,和它的一个异常处理办法:Sharding item parameters '1' format error, should be int=xx,int=xx
原文地址:https://www.cnblogs.com/MyOceansWeb/p/10306702.html