Retrying Operations using Spring's RetryTemplate

 

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");

  }

});