How to correctly specify the listener for @Retryable annotation in Spring Retry framework to avoid global calls?

Accurate control of @Retryable annotation listener in Spring Retry framework

This article discusses how to accurately control the listener of @Retryable annotation in the Spring Retry framework, avoiding its global calls, and is triggered only when explicitly specified in the annotation.

Problem: The custom listener will still be called even if the listener is not specified in the @Retryable annotation.

Cause Analysis: This is usually because the listener is registered globally, rather than injection on demand.

Solution: Make sure that the custom listener is only called when explicitly specified in the @Retryable annotation:

1. Custom listener: Create a custom listener class inherited from RetryListenerSupport , such as MyRetryListener :

 public class MyRetryListener extends RetryListenerSupport {
    // Implement specific listening logic, such as retry times, exception handling, etc. @Override
    public<t e extends throwable> void onError(RetryContext context, RetryCallback<t e> callback, Throwable throwable) {
        // Custom error handling logic System.out.println("MyRetryListener: onError called");
    }
    // ...Other listening methods...
}</t></t>

2. Register Listener Bean: Register a custom listener as a Spring Bean:

 @Configuration
public class RetryConfig {
    @Bean
    public MyRetryListener myRetryListener() {
        return new MyRetryListener();
    }
}

3. Specify the listener in the @Retryable annotation: On the @Retryable method that needs to use a custom listener, explicitly specify the listener bean name:

 @Retryable(value = Exception.class, listeners = "myRetryListener")
public void myMethod() {
    // Method implementation, may throw Exception
}

4. Avoid global configuration: Avoid registering listeners in RetryTemplate or other global configurations. Directly specify the listener in the @Retryable annotation to achieve precise control. If more granular control is needed, consider using a custom RetryTemplate and configuring a listener there, and then specifying a custom RetryTemplate through the retryTemplate property in the @Retryable annotation.

Through the above steps, MyRetryListener will only be called when explicitly specifying listeners attribute in the @Retryable annotation, avoiding the problems caused by global calls and realizing precise control of the listener. This approach ensures the readability and maintainability of the code and avoids potential conflicts.

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