Stopping a Job in the beforeStep in Spring Batch

问题

I want to be able to stop a job when a timing threshold is met. There are 2 approaches I was thinking about. First was to stop the job in the afterStep. However, I do not want it to have a Stopped status if it is at the completion of the last step. Therefore, I am going with stopping it in the beforeStep.

I tried experimenting with

public void beforeStep(StepExecution stepExecution) {
    stepExecution.setStatus(BatchStatus.STOPPED);
    return;
}

and

public void beforeStep(StepExecution stepExecution) {
    stepExecution.setExitStatus(ExitStatus.STOPPED);
    return;
}

Neither of these worked. Any suggestions?

回答1:

The problem with the above code is that stops the currently running step, not the entire job.

Perhaps if you add and adjust the following code in the job-current-step configuration will terminate the job when the ExitStatus of the step is STOPPED and when runned again the job will start from the next step.
(Taken from here)

<step id="step1" parent="s1">
    <stop on="STOPPED" restart="step2"/>
</step>

This might also help solve the confusion between ExitStatus/BatchStatus.

About the timing threshold... As I understand so far you plan to measure time of the current step only (beforestep - afterstep), no matter how long previous steps were running. To calculate and the previous steps try adding a timestamp in JobParameters and check when that threshold is passed.

回答2:

In my case a needed to stop job from afterStep. So I returned ExitStatus.Unknown and catch from job like that:

step().on("UNKNOWN").end()

So the job finish without error and I can restart the entire job when i want, whitout "restartable" option.

Hope this can help you.

回答3:

i suggest looking at CompletionPolicies especially the TimeoutTerminationPolicy

回答4:

You can set a timer (or something similar) and when receive time-limit notitication stop the job as described in Stopping a job.
If you want the job is completed normally even if a time-alarm were broadcasted during last step, you can do check (using JobOperator) to query job progress.

来源：https://stackoverflow.com/questions/22122059/stopping-a-job-in-the-beforestep-in-spring-batch

标签

java

Spring

spring-batch