diff --git a/spring-kafka/src/main/java/org/springframework/kafka/annotation/KafkaListenerAnnotationBeanPostProcessor.java b/spring-kafka/src/main/java/org/springframework/kafka/annotation/KafkaListenerAnnotationBeanPostProcessor.java index 1edcc0104a..cf26bed6ae 100644 --- a/spring-kafka/src/main/java/org/springframework/kafka/annotation/KafkaListenerAnnotationBeanPostProcessor.java +++ b/spring-kafka/src/main/java/org/springframework/kafka/annotation/KafkaListenerAnnotationBeanPostProcessor.java @@ -411,6 +411,11 @@ public Object postProcessAfterInitialization(final Object bean, final String bea Set methodsWithHandler = MethodIntrospector.selectMethods(targetClass, (ReflectionUtils.MethodFilter) method -> AnnotationUtils.findAnnotation(method, KafkaHandler.class) != null); + + if (methodsWithHandler.isEmpty()) { + throw new IllegalStateException("No Kafka listener methods in bean: " + bean); + } + List multiMethods = new ArrayList<>(methodsWithHandler); processMultiMethodListeners(classLevelListeners, multiMethods, targetClass, bean, beanName); } diff --git a/spring-kafka/src/test/java/org/springframework/kafka/annotation/KafkaListenerAnnotationBeanPostProcessorTests.java b/spring-kafka/src/test/java/org/springframework/kafka/annotation/KafkaListenerAnnotationBeanPostProcessorTests.java new file mode 100644 index 0000000000..af2a9e08ed --- /dev/null +++ b/spring-kafka/src/test/java/org/springframework/kafka/annotation/KafkaListenerAnnotationBeanPostProcessorTests.java @@ -0,0 +1,64 @@ +/* + * Copyright 2025 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * https://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.springframework.kafka.annotation; + +import org.junit.jupiter.api.Test; + +import org.springframework.beans.factory.BeanCreationException; +import org.springframework.context.annotation.AnnotationConfigApplicationContext; +import org.springframework.context.annotation.Configuration; +import org.springframework.stereotype.Component; + +import static org.assertj.core.api.Assertions.assertThatExceptionOfType; + +/** + * @author Sanghyeok An + * + * @since 4.0.0 + */ + +class KafkaListenerAnnotationBeanPostProcessorTests { + + @Test + void ctx_should_be_fail_to_register_bean_when_no_listener_methods_exist() { + + AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(); + ctx.register(TestConfig.class); + + assertThatExceptionOfType(BeanCreationException.class) + .isThrownBy(ctx::refresh) + .withRootCauseInstanceOf(IllegalStateException.class) + .withMessageContaining("No Kafka listener methods in bean:") + .withMessageContaining("NoHandlerMethodListener"); + + } + + @EnableKafka + @Configuration + static class TestConfig { + + @Component + @KafkaListener + static class NoHandlerMethodListener { + + public void listen(String message) { + } + } + + } + +}