java/w11/RetryUtils.java

package w11;

public class RetryUtils {


    private static final long BASE_DELAY_MS = 500;

    @FunctionalInterface
    public interface RetryTask<T> {
        T run() throws Exception;
    }


    public static <T> T retry(int maxRetries, RetryTask<T> task) throws Exception {
        int attempt = 0;
        while (true) {
            try {
                return task.run();
            } catch (Exception e) {
                if (attempt >= maxRetries) {
                    throw e; 
                }

                long delay = BASE_DELAY_MS * (1L << attempt);
                Thread.sleep(delay);
                attempt++;
            }
        }
    }
}