服务器故障后 Spring Batch 恢复

我正在使用 Spring Batch 来解析文件，并且有以下场景：

我正在做一份工作。这项工作必须解析给定的文件。由于意外原因（比如断电），服务器出现故障，我必须重新启动机器。现在，重新启动服务器后，我想从断电前停止的位置恢复作业。这意味着如果系统从 10.000 行读取 1.300 行，现在必须从 1.301 行开始读取。

如何使用 Spring Batch 实现这个场景？

关于配置：我使用 spring-integration 来轮询目录下的新文件。当文件到达时，spring 集成会创建 spring 批处理作业。此外，spring-batch 使用 FlatFileItemReader 来解析文件。

这是 JVM 崩溃后重新启动作业的完整解决方案。

1. 通过设置 restarable="true" 使作业可重新启动

作业 id="作业名称" xmlns="http://www.springframework.org/schema/batch" 可重新启动=“真”

2.重新启动作业的代码

import java.util.Date;
import java.util.List;
import org.apache.commons.collections.CollectionUtils;
import org.springframework.batch.core.BatchStatus;
import org.springframework.batch.core.ExitStatus;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobInstance;
import org.springframework.batch.core.explore.JobExplorer;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.batch.core.launch.JobOperator;
import org.springframework.batch.core.repository.JobRepository;
import org.springframework.beans.factory.annotation.Autowired;

public class ResartJob {

    @Autowired
    private JobExplorer jobExplorer;
    @Autowired
    JobRepository jobRepository;
    @Autowired
    private JobLauncher jobLauncher;
    @Autowired 
    JobOperator jobOperator;

    public void restart(){
        try {
            List<JobInstance> jobInstances = jobExplorer.getJobInstances("jobName",0,1);// this will get one latest job from the database
            if(CollectionUtils.isNotEmpty(jobInstances)){
               JobInstance jobInstance =  jobInstances.get(0);
               List<JobExecution> jobExecutions = jobExplorer.getJobExecutions(jobInstance);
               if(CollectionUtils.isNotEmpty(jobExecutions)){
                   for(JobExecution execution: jobExecutions){
                       // If the job status is STARTED then update the status to FAILED and restart the job using JobOperator.java
                       if(execution.getStatus().equals(BatchStatus.STARTED)){ 
                           execution.setEndTime(new Date());
                           execution.setStatus(BatchStatus.FAILED);                               
                           execution.setExitStatus(ExitStatus.FAILED);                               
                           jobRepository.update(execution);
                           jobOperator.restart(execution.getId());
                       }
                   }
               }
            }
        } catch (Exception e1) {
            e1.printStackTrace();
        }
    }
}

3.

<bean id="jobRepository" class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean" p:dataSource-ref="dataSource" p:transactionManager-ref="transactionManager" p:lobHandler-ref="oracleLobHandler"/>

<bean id="oracleLobHandler" class="org.springframework.jdbc.support.lob.DefaultLobHandler"/>


<bean id="jobExplorer" class="org.springframework.batch.core.explore.support.JobExplorerFactoryBean" p:dataSource-ref="dataSource" />

<bean id="jobRegistry" class="org.springframework.batch.core.configuration.support.MapJobRegistry" />

<bean id="jobLauncher" class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
        <property name="jobRepository" ref="jobRepository" />
        <property name="taskExecutor" ref="jobLauncherTaskExecutor" /> 
</bean> <task:executor id="jobLauncherTaskExecutor" pool-size="6" rejection-policy="ABORT" />

<bean id="jobOperator" class="org.springframework.batch.core.launch.support.SimpleJobOperator" p:jobLauncher-ref="jobLauncher" p:jobExplorer-re`enter code here`f="jobExplorer" p:jobRepository-ref="jobRepository" p:jobRegistry-ref="jobRegistry"/>