Spring Batch：如何确定作业是否重新启动 [英] Spring Batch: How to find out if job is restarted

问题描述

有没有可能找到，如果在Spring Batch中重新启动作业？

Is there any possibility to find out, If a job is restarted in Spring Batch?

我们确实提供了一些没有从spring-batch重启支持的Tasklet，并且如果重新启动了作业，则必须实现我们自己的程序。

We do provide some Tasklets without restart-support from spring-batch and has to implement our own proceeding, if job is restarted.

在JobRepository，JobOperator，JobExplorer等中找不到任何可能。

Can't find any possibility in JobRepository, JobOperator, JobExplorer, etc.

推荐答案

使用必需属性定义JobExplorer bean

Define a JobExplorer bean with required properties

<bean id="jobExplorer"
class="org.springframework.batch.core.explore.support.JobExplorerFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="lobHandler" ref="lobHandler"/>
</bean>

用你的jobName查询

Query it with your jobName

List<JobInstance> jobInstances= jobExplorer.getJobInstances(jobName);

for (JobInstance jobInstance : jobInstances) {
    List<JobExecution> jobExecutions = jobExplorer.getJobExecutions(jobInstance);
    for (JobExecution jobExecution : jobExecutions) {
        if (jobExecution.getExitStatus().equals(ExitStatus.COMPLETED)) {
        //You found a completed job, possible candidate for a restart
        //You may check if the job is restarted comparing jobParameters
        JobParameters jobParameters = jobInstance.getParameters();
        //Check your running job if it has the same jobParameters 
        }
     }
}

没有编译这个，但我希望它能给出一个想法

Did not compile this but I hope it gives an idea

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