Expose RetryException#getRetryCount() and accept maxAttempts(0)

Closes gh-35351
Closes gh-35362

spring-context/src/test/java/org/springframework/resilience/ReactiveRetryInterceptorTests.java

@@ -189,6 +189,26 @@ class ReactiveRetryInterceptorTests {
 		assertThat(target.counter.get()).isEqualTo(2);
 	}
 
+	@Test
+	void adaptReactiveResultWithZeroAttempts() {
+		// Test minimal retry configuration: maxAttempts=1, delay=0, jitter=0, multiplier=1.0, maxDelay=0
+		MinimalRetryBean target = new MinimalRetryBean();
+		ProxyFactory pf = new ProxyFactory();
+		pf.setTarget(target);
+		pf.addAdvice(new SimpleRetryInterceptor(
+				new MethodRetrySpec((m, t) -> true, 0, Duration.ZERO, Duration.ZERO, 1.0, Duration.ZERO)));
+		MinimalRetryBean proxy = (MinimalRetryBean) pf.getProxy();
+
+		// Should execute only 1 time, because maxAttempts=0 means initial call only
+		assertThatIllegalStateException()
+				.isThrownBy(() -> proxy.retryOperation().block())
+				.satisfies(isRetryExhaustedException())
+				.havingCause()
+				.isInstanceOf(IOException.class)
+				.withMessage("1");
+		assertThat(target.counter.get()).isEqualTo(1);
+	}
+
 	@Test
 	void adaptReactiveResultWithZeroDelayAndJitter() {
 		// Test case where delay=0 and jitter>0

spring-context/src/test/java/org/springframework/resilience/RetryInterceptorTests.java

@@ -194,6 +194,31 @@ class RetryInterceptorTests {
 		assertThat(target.counter).isEqualTo(6);
 	}
 
+	@Test
+	void withPostProcessorForClassWithZeroAttempts() {
+		Properties props = new Properties();
+		props.setProperty("delay", "10");
+		props.setProperty("jitter", "5");
+		props.setProperty("multiplier", "2.0");
+		props.setProperty("maxDelay", "40");
+		props.setProperty("limitedAttempts", "0");
+
+		GenericApplicationContext ctx = new GenericApplicationContext();
+		ctx.getEnvironment().getPropertySources().addFirst(new PropertiesPropertySource("props", props));
+		ctx.registerBeanDefinition("bean", new RootBeanDefinition(AnnotatedClassBeanWithStrings.class));
+		ctx.registerBeanDefinition("bpp", new RootBeanDefinition(RetryAnnotationBeanPostProcessor.class));
+		ctx.refresh();
+		AnnotatedClassBeanWithStrings proxy = ctx.getBean(AnnotatedClassBeanWithStrings.class);
+		AnnotatedClassBeanWithStrings target = (AnnotatedClassBeanWithStrings) AopProxyUtils.getSingletonTarget(proxy);
+
+		assertThatIOException().isThrownBy(proxy::retryOperation).withMessage("3");
+		assertThat(target.counter).isEqualTo(3);
+		assertThatIOException().isThrownBy(proxy::otherOperation);
+		assertThat(target.counter).isEqualTo(4);
+		assertThatIOException().isThrownBy(proxy::overrideOperation);
+		assertThat(target.counter).isEqualTo(5);
+	}
+
 	@Test
 	void withEnableAnnotation() throws Exception {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();