Spring批处理并行接缝上下文，没有活动的应用程序上下文

Question

我试图并行处理Spring批处理作业中的一些步骤。作业的XML配置如下：

<batch:job id= "job" job-repository = "jobRepository">
  <batch:split id="split" task-executor="taskExecutor">
    <batch:flow>
      <batch:step id = "step1">
        <batch:tasklet transaction-manager = "txManager" >
          <batch:chunk reader            = "reader1"
                       processor         = "processor1"
                       writer            = "writer1"
                       commit-interval   = "1" />
        </batch:tasklet>
      </batch:step>
    </batch:flow>
    <batch:flow>
       <batch:step id = "step2">
         <batch:tasklet transaction-manager = "txManager">
           <batch:chunk reader            = "reader2"
                        processor         = "processor2"
                        writer            = "writer2"
                        commit-interval   = "1" />
        </batch:tasklet>
      </batch:step>
    </batch:flow>
  </batch:split>
</batch:job>

Answer 1

在步骤执行之前启动上下文：

    <batch:step id="step1">
        <batch:tasklet>
            <batch:chunk ...>
            </batch:chunk>
        </batch:tasklet>
        <batch:listeners>
            <batch:listener ref="stepExecutionListener"/>
        </batch:listeners>
    </batch:step>

StepExecutionListener：

public abstract class MyStepExecutionListener implements StepExecutionListener {

    @Override
    public void beforeStep(StepExecution stepExecution) {
        Lifecycle.beginCall();
    }

    /**
     * Default no-op implementation.
     * @return ExitStatus of step.
     */
    @Override
    public ExitStatus afterStep(StepExecution stepExecution) {
        return stepExecution.getExitStatus();
    }
}