Spring Retry With An Example

Spring Retry is a module in the broader Spring ecosystem that provides support for retrying failed operations. It’s particularly useful in scenarios where transient failures may occur, and you want to gracefully handle those failures by retrying the operation.

Here’s a step-by-step guide on how to use Spring Retry in a Spring Boot project:

Step 1: Add Spring Retry Dependency

Include the Spring Retry dependency in your project. If you’re using Maven, add the following to your pom.xml:

<dependency>
    <groupId>org.springframework.retry</groupId>
    <artifactId>spring-retry</artifactId>
</dependency>

If you’re using Gradle, add the following to your build.gradle:

implementation 'org.springframework.retry:spring-retry'

Step 2: Enable Retry in Your Spring Boot Application

In your main application class or a configuration class, add the @EnableRetry annotation:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.retry.annotation.EnableRetry;

@SpringBootApplication
@EnableRetry
public class YourApplication {
    public static void main(String[] args) {
        SpringApplication.run(YourApplication.class, args);
    }
}

Step 3: Apply Retry Logic to Methods

Now, you can use the @Retryable annotation on methods where you want to apply retry logic. Specify the exception types for which retries should be attempted and the maximum number of retries:

import org.springframework.retry.annotation.Retryable;

public class YourService {
    @Retryable(value = YourRetryableException.class, maxAttempts = 3)
    public void yourMethod() {
        // Your business logic
    }
}

In this example, yourMethod will be retried up to 3 times if a YourRetryableException occurs.

Step 4: Configure Retry Backoff (Optional)

You can customize the backoff policy between retries using the @Backoff annotation. This allows you to specify properties like delay and maxDelay:

import org.springframework.retry.annotation.Retryable;
import org.springframework.retry.annotation.Backoff;

public class YourService {
    @Retryable(value = YourRetryableException.class, maxAttempts = 3, backoff = @Backoff(delay = 1000))
    public void yourMethod() {
        // Your business logic
    }
}

In this example, there is a delay of 1000 milliseconds (1 second) between each retry.

Step 5: Handle Recoverable Exceptions (Optional)

You can use the @Recover annotation to specify a fallback method that will be called if retries are exhausted:

import org.springframework.retry.annotation.Recover;

public class YourService {
    @Retryable(value = YourRetryableException.class, maxAttempts = 3, backoff = @Backoff(delay = 1000))
    public void yourMethod() {
        // Your business logic
    }
    @Recover
    public void recover(YourRetryableException ex) {
        // Fallback logic
    }
}

The recover method will be called if all retry attempts fail.

That’s it! You’ve integrated Spring Retry into your Spring Boot application. Customize the retry settings based on your specific requirements.

Note: Replace YourRetryableException with the actual exception type for which you want to enable retries. Adjust the retry settings according to your use case.