Retry Whole Batch Job for n times - spring

Question

Is it possible to retry a particular job for say n times?
public void run() {
String[] springConfig = { "spring/batch/jobs/job-read-files.xml" };
ApplicationContext context = new ClassPathXmlApplicationContext(springConfig);
JobLauncher jobLauncher = (JobLauncher) context.getBean("jobLauncher");
Job job = (Job) context.getBean("partitionJob");
JobParameters jobParameters = new JobParameters();
for (int i = 0; i < 2; i++) {
try {
JobExecution execution = jobLauncher.run(job,jobParameters);
System.out.println("Exit Status : " + execution.getAllFailureExceptions());
} catch (Exception e) {
e.printStackTrace();
}
}
System.out.println("Done");
}
I tried this, but since spring batch stores some status for job completion,it doesn't work in the second and third time.
Update: It worked when i tried this
public void run() {
for (int i = 0; i <= 2; i++) {
String[] springConfig = { "spring/batch/jobs/job-read-files.xml" };
ApplicationContext context = new ClassPathXmlApplicationContext(springConfig);
JobLauncher jobLauncher = (JobLauncher) context.getBean("jobLauncher");
Job job = (Job) context.getBean("partitionJob");
JobParameters jobParameters = new JobParameters();
try {
JobExecution execution = jobLauncher.run(job,jobParameters);
System.out.println("Exit Status : " + execution.getAllFailureExceptions());
} catch (Exception e) {
e.printStackTrace();
}
}
System.out.println("Done");
}
Is there a better solution than this?
Here is my job config
<!-- partitioner job -->
<job id="partitionJob" restartable="true" xmlns="http://www.springframework.org/schema/batch">
<!-- master step, 2 threads (grid-size) -->
<step id="masterStep" next="finalstep">
<partition step="slave" partitioner="rangePartitioner">
<handler grid-size="2" task-executor="taskExecutor" />
</partition>
</step>
<step id="finalstep">
<tasklet>
<chunk reader="dummyReader" writer="spWriter" commit-interval="1" />
</tasklet>
</step>
</job>
<batch:step id="slave">
<tasklet>
<chunk reader="pagingItemReader" writer="dummyWriter"
commit-interval="2" retry-limit="3">
<batch:retryable-exception-classes>
<batch:include class="java.lang.Exception" />
</batch:retryable-exception-classes>
</chunk>
</tasklet>
</batch:step>

Answer 1

Spring has nice retry mechanism, where you can define RetryTemplate, and you call some part of code N times, and you can define RetryCallback and RecoveryCallback which is nice.
Spring batch actually uses it internally for retry mechanism on step. You can checkout spring retry documentation and regarding retry on step level this is nice blog post which explains skip and retry mechanism in spring batch.