Retrying Operations using Spring's RetryTemplate

Back in 2009, I blogged about Retrying Operations in Java in which I covered three different approaches to retrying operations on failure. Here is another alternative:

If your application is using Spring then it is easier to use the Spring Framework's RetryTemplate.

The example below shows how you can use a RetryTemplate to lookup a remote object. If the remote call fails, it will be retried five times with exponential backoff.

// import the necessary classes
import org.springframework.batch.retry.RetryCallback;
import org.springframework.batch.retry.RetryContext;
import org.springframework.batch.retry.backoff.ExponentialBackOffPolicy;
import org.springframework.batch.retry.policy.SimpleRetryPolicy;
import org.springframework.batch.retry.support.RetryTemplate;
...

// create the retry template
final RetryTemplate template = new RetryTemplate();
template.setRetryPolicy(new SimpleRetryPolicy(5));
final ExponentialBackOffPolicy backOffPolicy = new ExponentialBackOffPolicy();
backOffPolicy.setInitialInterval(1000L);
template.setBackOffPolicy(backOffPolicy);

// execute the operation using the retry template
template.execute(new RetryCallback<Remote>() {
  @Override
  public Remote doWithRetry(final RetryContext context) throws Exception {
    return (Remote) Naming.lookup("rmi://somehost:2106/MyApp");
  }
});

Related Posts:
Retrying Operations in Java