RetryInterceptorBuilder – Spring Retry

Spring Retry is a powerful framework for adding retry logic to your Spring applications. The RetryInterceptorBuilder is a part of Spring Retry that allows you to create custom retry logic for methods in your application. Below is an example of how to use RetryInterceptorBuilder with customization:

First, make sure you have the necessary Spring Retry dependencies in your project. You can add them to your Maven pom.xml like this:

<dependency>
    <groupId>org.springframework.retry</groupId>
    <artifactId>spring-retry</artifactId>
    <version>1.3.1</version> <!-- Use the appropriate version for your project -->
</dependency>

Now, let’s create a custom retry logic using RetryInterceptorBuilder:

import org.springframework.retry.RetryCallback;
import org.springframework.retry.RetryContext;
import org.springframework.retry.RetryPolicy;
import org.springframework.retry.annotation.AnnotationAwareRetryOperationsInterceptor;
import org.springframework.retry.backoff.FixedBackOffPolicy;
import org.springframework.retry.policy.SimpleRetryPolicy;
import org.springframework.retry.support.RetryTemplate;

public class CustomRetryInterceptor extends AnnotationAwareRetryOperationsInterceptor {

    public CustomRetryInterceptor() {
        RetryTemplate retryTemplate = new RetryTemplate();

        // Customize the retry policy
        RetryPolicy retryPolicy = new SimpleRetryPolicy(3); // Retry up to 3 times
        retryTemplate.setRetryPolicy(retryPolicy);

        // Customize the backoff policy
        FixedBackOffPolicy backOffPolicy = new FixedBackOffPolicy();
        backOffPolicy.setBackOffPeriod(1000); // Wait 1 second between retries
        retryTemplate.setBackOffPolicy(backOffPolicy);

        setRetryOperations(retryTemplate);
    }

    @Override
    protected <T> T doExecute(RetryCallback<T, RuntimeException> retryCallback, RetryContext retryContext) throws Exception {
        return super.doExecute(retryCallback, retryContext);
    }
}

In the code above:

We create a CustomRetryInterceptor class that extends AnnotationAwareRetryOperationsInterceptor, which is a Spring Retry interceptor suitable for method-level retry logic.
In the constructor of CustomRetryInterceptor, we create a RetryTemplate and customize the retry policy and backoff policy. In this example, we use a simple retry policy that retries up to 3 times and a fixed backoff policy that waits 1 second between retries. You can customize these policies according to your needs.
We set the configured RetryTemplate as the retry operations for this interceptor.
The doExecute method is overridden to provide custom logic if needed. In this example, it simply delegates to the superclass method.

Now, you can use this custom retry interceptor in your Spring beans. Here’s an example of how to use it with a service method:

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class MyService {

    @Autowired
    private CustomRetryInterceptor customRetryInterceptor;

    @Retryable(value = { MyCustomException.class }, interceptor = "customRetryInterceptor")
    public void myMethod() throws MyCustomException {
        // Your business logic here
    }
}

In the code above, we annotate the myMethod with @Retryable and specify the custom retry interceptor (customRetryInterceptor) to be used for this method. The method will be retried according to the retry logic defined in the CustomRetryInterceptor. Adjust the exception type (MyCustomException) and other parameters as needed for your specific use case.

Remember to configure Spring Retry and make sure that Spring is scanning for components correctly to pick up your custom interceptor and annotated methods.

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