How can detect last retry?

[donghoon-khan]

I am using Spring-retry-1.3.4, i want to detect the event before the last retry and insert logic. Is there a way? I think I can use RetryListener, but I can't.

TestService.java

    @Retryable(
            value = {Exception.class},
            maxAttempts = 2
    )
    public void test1() {
    }

    @Retryable(
            value = {Exception.class},
            maxAttempts = 3
    )
    public void test2() {
    }

    @Retryable(
            value = {Exception.class},
            maxAttempts = 4
    )
    public void test3() {
    }

MyRetryListener.java

public class MyListener implements RetryListener {
...
    public <T, E extends Throwable> void onError(
            final RetryContext context,
            final RetryCallback<T, E> callback,
            final Throwable throwable
    ) {
        if (getMaxAttemps() == context.getRetryCount()) {
            logic();
        }
    }
    
    private int getMaxAttemps() {
        ???
    }
}

[garyrussell]

Don't use issues to ask questions - ask on Stack Overflow or use the Discussions tab for Q&A.

The context only has access to the count; it has no knowledge of the retry policy.

[artembilan]

Not all RetryPolicy impls are based on the count, but you indeed can inject the same MaxAttemptsRetryPolicy into your listener to make an analysis you are looking for based on its getMaxAttempts().

[artembilan]

Also, there is a special ExhaustedRetryException thrown in case a RetryPolicy cannot retry any more:

			rethrow(context, "Retry exhausted after last attempt with no recovery path",
					this.throwLastExceptionOnExhausted || !doRecover);
...
protected <E extends Throwable> void rethrow(RetryContext context, String message, boolean wrap) throws E {
		if (wrap) {
			@SuppressWarnings("unchecked")
			E rethrow = (E) context.getLastThrowable();
			throw rethrow;
		}
		else {
			throw new ExhaustedRetryException(message, context.getLastThrowable());
		}
	}