Polish backoff and retry support

This revises commit 15dd320b95.

See gh-34529
See gh-35110

spring-aop/src/main/java/org/springframework/aop/retry/MethodRetrySpec.java

@@ -31,10 +31,10 @@ import java.util.Collections;
  * @param excludes non-applicable exception types to avoid a retry for
  * @param predicate a predicate for filtering exceptions from applicable methods
  * @param maxAttempts the maximum number of retry attempts
- * @param delay the base delay after the initial invocation (in milliseconds)
- * @param jitter a jitter value for the next retry attempt (in milliseconds)
+ * @param delay the base delay after the initial invocation
+ * @param jitter a jitter value for the next retry attempt
  * @param multiplier a multiplier for a delay for the next retry attempt
- * @param maxDelay the maximum delay for any retry attempt (in milliseconds)
+ * @param maxDelay the maximum delay for any retry attempt
  * @see AbstractRetryInterceptor#getRetrySpec
  * @see SimpleRetryInterceptor#SimpleRetryInterceptor(MethodRetrySpec)
  * @see org.springframework.aop.retry.annotation.Retryable

spring-aop/src/main/java/org/springframework/aop/retry/annotation/Retryable.java

@@ -43,6 +43,7 @@ import org.springframework.core.annotation.AliasFor;
  * @since 7.0
  * @see RetryAnnotationBeanPostProcessor
  * @see RetryAnnotationInterceptor
+ * @see org.springframework.core.retry.RetryPolicy
  * @see org.springframework.core.retry.RetryTemplate
  * @see reactor.core.publisher.Mono#retryWhen
  * @see reactor.core.publisher.Flux#retryWhen
@@ -95,8 +96,8 @@ public @interface Retryable {
 	long maxAttempts() default 3;
 
 	/**
-	 * The base delay after the initial invocation in milliseconds. If a multiplier
-	 * is specified, this serves as the initial delay to multiply from.
+	 * The base delay after the initial invocation. If a multiplier is specified,
+	 * this serves as the initial delay to multiply from.
 	 * <p>The time unit is milliseconds by default but can be overridden via
 	 * {@link #timeUnit}.
 	 * <p>The default is 1000.
@@ -147,7 +148,7 @@ public @interface Retryable {
 	/**
 	 * The {@link TimeUnit} to use for {@link #delay}, {@link #jitter},
 	 * and {@link #maxDelay}.
-	 * <p>Defaults to {@link TimeUnit#MILLISECONDS}.
+	 * <p>The default is {@link TimeUnit#MILLISECONDS}.
 	 */
 	TimeUnit timeUnit() default TimeUnit.MILLISECONDS;
 

spring-core/src/main/java/org/springframework/util/backoff/ExponentialBackOff.java

@@ -90,7 +90,7 @@ public class ExponentialBackOff implements BackOff {
 	 * The default maximum attempts: unlimited.
 	 * @since 6.1
 	 */
-	public static final int DEFAULT_MAX_ATTEMPTS = Integer.MAX_VALUE;
+	public static final long DEFAULT_MAX_ATTEMPTS = Long.MAX_VALUE;
 
 
 	private long initialInterval = DEFAULT_INITIAL_INTERVAL;