Revise naming and docs for "jitter" and "multiplier" in AOP retry support

See gh-34529

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

@@ -104,8 +104,8 @@ public abstract class AbstractRetryInterceptor implements MethodInterceptor {
 
 		ExponentialBackOff backOff = new ExponentialBackOff();
 		backOff.setInitialInterval(spec.delay());
-		backOff.setJitter(spec.jitterDelay());
+		backOff.setJitter(spec.jitter());
-		backOff.setMultiplier(spec.delayMultiplier());
+		backOff.setMultiplier(spec.multiplier());
 		backOff.setMaxInterval(spec.maxDelay());
 		backOff.setMaxAttempts(spec.maxAttempts());
 		retryTemplate.setBackOffPolicy(backOff);
@@ -147,8 +147,8 @@ public abstract class AbstractRetryInterceptor implements MethodInterceptor {
 
 			Publisher<?> publisher = adapter.toPublisher(result);
 			Retry retry = Retry.backoff(spec.maxAttempts(), Duration.ofMillis(spec.delay()))
-					.jitter((double) spec.jitterDelay() / spec.delay())
+					.jitter((double) spec.jitter() / spec.delay())
-					.multiplier(spec.delayMultiplier())
+					.multiplier(spec.multiplier())
 					.maxBackoff(Duration.ofMillis(spec.maxDelay()))
 					.filter(spec.combinedPredicate().forMethod(method));
 			publisher = (adapter.isMultiValue() ? Flux.from(publisher).retryWhen(retry) :

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

@@ -31,8 +31,8 @@ import java.util.Collections;
  * @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 jitterDelay a jitter delay for the next retry attempt (in milliseconds)
+ * @param jitter a jitter value for the next retry attempt (in milliseconds)
- * @param delayMultiplier a multiplier for a delay 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)
  * @see AbstractRetryInterceptor#getRetrySpec
  * @see SimpleRetryInterceptor#SimpleRetryInterceptor(MethodRetrySpec)
@@ -44,8 +44,8 @@ public record MethodRetrySpec(
 		MethodRetryPredicate predicate,
 		int maxAttempts,
 		long delay,
-		long jitterDelay,
+		long jitter,
-		double delayMultiplier,
+		double multiplier,
 		long maxDelay) {
 
 	public MethodRetrySpec(MethodRetryPredicate predicate, int maxAttempts, long delay) {
@@ -53,10 +53,10 @@ public record MethodRetrySpec(
 	}
 
 	public MethodRetrySpec(MethodRetryPredicate predicate, int maxAttempts, long delay,
-			long jitterDelay, double delayMultiplier, long maxDelay) {
+			long jitter, double multiplier, long maxDelay) {
 
 		this(Collections.emptyList(), Collections.emptyList(), predicate, maxAttempts, delay,
-				jitterDelay, delayMultiplier, maxDelay);
+				jitter, multiplier, maxDelay);
 	}
 
 

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

@@ -60,8 +60,8 @@ public class RetryAnnotationInterceptor extends AbstractRetryInterceptor {
 		retrySpec = new MethodRetrySpec(
 				Arrays.asList(retryable.includes()), Arrays.asList(retryable.excludes()),
 				instantiatePredicate(retryable.predicate()), retryable.maxAttempts(),
-				retryable.delay(), retryable.jitterDelay(),
+				retryable.delay(), retryable.jitter(),
-				retryable.delayMultiplier(), retryable.maxDelay());
+				retryable.multiplier(), retryable.maxDelay());
 
 		MethodRetrySpec existing = this.retrySpecCache.putIfAbsent(cacheKey, retrySpec);
 		return (existing != null ? existing : retrySpec);

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

@@ -97,44 +97,44 @@ public @interface Retryable {
 	 * The base delay after the initial invocation in milliseconds.
 	 * If a multiplier is specified, this serves as the initial delay to multiply from.
 	 * <p>The default is 1000.
-	 * @see #jitterDelay()
+	 * @see #jitter()
-	 * @see #delayMultiplier()
+	 * @see #multiplier()
 	 * @see #maxDelay()
 	 */
 	long delay() default 1000;
 
 	/**
-	 * A jitter delay for the base retry attempt (in milliseconds), randomly
+	 * A jitter value (in milliseconds) for the base retry attempt, randomly
-	 * subtracted or added to the calculated delay, resulting in a value
+	 * subtracted or added to the calculated delay, resulting in a value between
-	 * between {@code delay - jitterDelay} and {@code delay + jitterDelay}
+	 * {@code delay - jitter} and {@code delay + jitter} but never below the base
-	 * but never below the base {@link #delay()} or above {@link #maxDelay()}.
+	 * {@link #delay()} or above {@link #maxDelay()}.
-	 * If a multiplier is specified, it applies to the jitter delay as well.
+	 * <p>If a multiplier is specified, it is applied to the jitter value as well.
 	 * <p>The default is 0 (no jitter).
 	 * @see #delay()
-	 * @see #delayMultiplier()
+	 * @see #multiplier()
 	 * @see #maxDelay()
 	 */
-	long jitterDelay() default 0;
+	long jitter() default 0;
 
 	/**
 	 * A multiplier for a delay for the next retry attempt, applied
 	 * to the previous delay (starting with {@link #delay()}) as well
-	 * as to the applicable {@link #jitterDelay()} for each attempt.
+	 * as to the applicable {@link #jitter()} for each attempt.
 	 * <p>The default is 1.0, effectively resulting in a fixed delay.
 	 * @see #delay()
-	 * @see #jitterDelay()
+	 * @see #jitter()
 	 * @see #maxDelay()
 	 */
-	double delayMultiplier() default 1.0;
+	double multiplier() default 1.0;
 
 	/**
 	 * The maximum delay for any retry attempt (in milliseconds), limiting
-	 * how far {@link #jitterDelay()} and {@link #delayMultiplier()} can
+	 * how far {@link #jitter()} and {@link #multiplier()} can increase the
-	 * increase the {@linkplain #delay() delay}.
+	 * {@linkplain #delay() delay}.
 	 * <p>The default is unlimited.
 	 * @see #delay()
-	 * @see #jitterDelay()
+	 * @see #jitter()
-	 * @see #delayMultiplier()
+	 * @see #multiplier()
 	 */
 	long maxDelay() default Integer.MAX_VALUE;
 

spring-aop/src/test/java/org/springframework/aop/retry/ReactiveRetryInterceptorTests.java

@@ -152,7 +152,7 @@ public class ReactiveRetryInterceptorTests {
 	}
 
 
-	@Retryable(delay = 10, jitterDelay = 5, delayMultiplier = 2.0, maxDelay = 40,
+	@Retryable(delay = 10, jitter = 5, multiplier = 2.0, maxDelay = 40,
 			includes = IOException.class, excludes = AccessDeniedException.class,
 			predicate = CustomPredicate.class)
 	public static class AnnotatedClassBean {

spring-aop/src/test/java/org/springframework/aop/retry/RetryInterceptorTests.java

@@ -135,7 +135,7 @@ public class RetryInterceptorTests {
 	}
 
 
-	@Retryable(delay = 10, jitterDelay = 5, delayMultiplier = 2.0, maxDelay = 40,
+	@Retryable(delay = 10, jitter = 5, multiplier = 2.0, maxDelay = 40,
 			includes = IOException.class, excludes = AccessDeniedException.class,
 			predicate = CustomPredicate.class)
 	public static class AnnotatedClassBean {