How to Configure a RetryTemplate in Spring Batch with Java Configuration

I am trying to set up a RetryTemplate in Spring Batch, I just cannot find an example on how to add the RetryTemplate into the StepBuilderFactory. I've found this example to set it up in a SpringBoot Application, https://dzone.com/articles/how-to-use-spring-retry-template but no luck on Spring Batch.

The reason I am trying to use RetryTemplate is to set-up a Exponential BackOffPolicy (Spring Batch how to configure retry period for failed jobs).

I imagine to wire the RetryTemplate would be as simple as setting the RetryTemplate Bean, something like it (modified code from @Mahmoud Ben Hassine answer Spring Batch how to configure retry period for failed jobs):

@Bean
public RetryTemplate testExponentialBackoff() throws Exception {
        // configure backoff policy
        ExponentialBackOffPolicy exponentialBackOffPolicy = new ExponentialBackOffPolicy();
        exponentialBackOffPolicy.setInitialInterval(1000);
        exponentialBackOffPolicy.setMultiplier(2.0);
        exponentialBackOffPolicy.setMaxInterval(10000);

        // configure retry policy
        SimpleRetryPolicy simpleRetryPolicy = new SimpleRetryPolicy();
        simpleRetryPolicy.setMaxAttempts(5);

        // configure retry template
        RetryTemplate retryTemplate = new RetryTemplate();
        retryTemplate.setBackOffPolicy(exponentialBackOffPolicy);
        retryTemplate.setRetryPolicy(simpleRetryPolicy);
        return retryTemplate;
    }

I am not finding a way to wire it to the StepBuilderFactory . I would imagine it would be something similar to the "standard" retry:

  .faultTolerant()
  .retryLimit(3)
  .retry(ConnectTimeoutException.class)

Does anybody have an example/template on how to set it up using Java Configuration?

Any help/example is appreciated. Thx, Markus.

If your goal is to set a custom backoff policy, there is no need to provide an entire RetryTemplate for that, you can do it with the FaultTolerantStepBuilder#backOffPolicy method, something like:

// configure backoff policy
ExponentialBackOffPolicy exponentialBackOffPolicy = new ExponentialBackOffPolicy();
// customize exponentialBackOffPolicy as needed

Step step = stepBuilderFactory.get("step")
        .chunk(5)
        // configure reader/writer etc
        .faultTolerant()
        .backOffPolicy(exponentialBackOffPolicy)
        // set other properties
        .build();

Now if you really want to provide a custom RetryOperations object, you need to extend the FaultTolerantStepBuilder and override the createRetryOperations method.