在Tasklet实现上添加可跳过的异常类

Question

<job id="pullPurgeProcessStoreFiles" xmlns="http://www.springframework.org/schema/batch">
    <bean id="PullFilesTasklet" class="com.example.PullFilesTasklet" />
         <step id="pullFiles" next="validation" >
            <tasklet ref="PullFilesTasklet">
                <skippable-exception-classes>
                    <include class="java.io.FileNotFoundException"/>
                </skippable-exception-classes>
            </tasklet>  
        </step>     
</job>

Getting below Error : Invalid content was found starting with element skippable-exception-classes .

On researching I found that skippable-exception-classes can be used within chunks. But I need to achieve the same with ref tasklets.

Answer 1

If you want to Skip Exception in your own Tasklet implementation, you need to write the code to do so in within your Tasklet own implementation.

Follow this original thread and please Up Vote on original thread if this solution works for you.

You can do something like

abstract class SkippableTasklet implements Tasklet {

    //Exceptions that should not cause job status to be BatchStatus.FAILED
    private List<Class<?>> skippableExceptions;

    public void setSkippableExceptions(List<Class<?>> skippableExceptions) {
        this.skippableExceptions = skippableExceptions;
    }

    private boolean isSkippable(Exception e) {
        if (skippableExceptions == null) {
            return false;
        }

        for (Class<?> c : skippableExceptions) {
            if (e.getClass().isAssignableFrom(c)) {
                return true;
            }
        }
        return true;
    }

    protected abstract void run(JobParameters jobParameters) throws Exception;

    @Override
    public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext)
            throws Exception {

        StepExecution stepExecution = chunkContext.getStepContext().getStepExecution();
        JobExecution jobExecution = stepExecution.getJobExecution();
        JobParameters jobParameters = jobExecution.getJobParameters();

        try {
            run(prj);
        } catch (Exception e) {
            if (!isSkippable(e)) {
                throw e;
            } else {
                jobExecution.addFailureException(e);
            }
        }

        return RepeatStatus.FINISHED;
    }
}

And in SpringXML configuration

<batch:tasklet>
    <bean class="com.MySkippableTasklet" scope="step" autowire="byType">
        <property name="skippableExceptions">
            <list>
                <value>org.springframework.mail.MailException</value>
            </list>
        </property>
    </bean>
</batch:tasklet>