Spring kafka test listener. We’ll be focusing on setting up a KafkaConsumer without relying on Spring Boot modules. We provide a “template” as a high-level abstraction for sending messages. The following component creates a listener endpoint on the someTopic topic: Home » org. It provides a "template" as a high-level abstraction for sending messages. Kafka Listeners are configured with the @KafkaListener annotation and are started automatically when the application launches. It also provides support for Message-driven POJOs with @KafkaListener annotations and a "listener container". Create a Custom Kafka Listener Nov 2, 2021 · The Spring for Apache Kafka project applies core Spring concepts to the development of Kafka-based messaging solutions. I want to know that if a kafka message is sent to it's topic, the listener method was called correctly. In this tutorial, we’ll cover Spring support for Kafka and its abstraction level over native Kafka Java client APIs. We are going to create a Spring Boot project with Kafka, Spring Data JPA and MySQL, where we implement a Kafka Listeners which receives an event payload and persists the event data in the database. Then we will test this Kafka Listener using the Testcontainers Kafka and MySQL modules in conjunction with Awaitility. Oct 12, 2018 · Trying to figure out if I can write unit test for @KafkaListener using spring-kafka and spring-kafka-test. listener. Master Spring Boot Kafka Testing with our detailed guide. Jan 26, 2025 · Apache Kafka is a distributed and fault-tolerant stream processing system. If no KafkaListenerContainerFactory has been defined, a default one is automatically configured with keys defined in spring. Verify that your listener processes messages correctly by capturing and asserting the outcome. To define it, let’s declare a UserEventListener class: @KafkaListener(id = Constants. Jan 8, 2024 · Learn about a couple of approaches for testing Kafka applications with Spring Boot. Contribute to kasramp/spring-kafka-test development by creating an account on GitHub. My consumer class is annotated lik When the Apache Kafka infrastructure is present, any bean can be annotated with @KafkaListener to create a listener endpoint. Jan 10, 2024 · In this tutorial, we’ll learn how to create a Kafka listener and consume messages from a topic using Kafka’s Consumer API. Make sure to match the topic name in your listener and your test producer. 3, it unconditionally sets it to false unless specifically set in the consumer factory or the container’s consumer property overrides. Edit FYI: working gitHub example I was searching the internet and couldn't find a working and simple example of an embedded Kafka test. This step-by-step guide provides practical instructions for seamless integration and testing of Kafka-based May 7, 2018 · I'm trying to unit test a kafka consumer class, in Spring. kafka » spring-kafkaSpring Kafka Support Jul 27, 2022 · welcome to a nice and easy guide on how to set up Integration Tests for Kafka using TestContainers and Embedded Kafka for Spring!. It processes incoming messages and provides a convenient way to consume Kafka data asynchronously. Spring Kafka brings the simple and typical Spring template programming model with a KafkaTemplate and Message-driven POJOs via @KafkaListener annotation. 2. What Is a Listener Container in Spring for Jul 31, 2022 · I want to test my kafka consumer, but there is in issue with @EmbddedKafka. MULTI_PARTITION_TOPIC, groupId = "test-group", containerFactory = "kafkaListenerContainerFactory", autoStartup = "false") public void processUserEvent Feb 18, 2025 · Testing Spring Boot Kafka with testcontainers Testcontainers is a widely used tool for enhancing integration tests to have a closer match to your production environment. Jul 6, 2024 · In Spring Kafka, annotating a method with @KafkaListener creates a listener that consumes messages from a specified topic. This includes mocking the Kafka listener behavior to ensure your application can handle the messages correctly without needing a live Kafka broker. It took me a lot of research to write this first integration test and I eventually ended up… Jul 23, 2025 · A Kafka Listener is a Spring Bean that listens to a Kafka topic. We also provide support for Message-driven POJOs. kafka. Learn best practices, code snippets, and common pitfalls in this beginner-friendly tutorial. Jun 14, 2023 · Learn how to use Spring @KafkaListener and @KafkaHandler annotations to consume and handle messages from Kafka topics. Use @Autowired to inject the KafkaTemplate for sending messages to the test topic. LISTENER_ID, topics = Constants. Testing Applications The spring-kafka-test jar contains some useful utilities to assist with testing your applications. My setup is: Spring boot Multiple @KafkaListener with differ Set up the test class with the @EmbeddedKafka annotation to enable an embedded Kafka broker. ENABLE_AUTO_COMMIT_CONFIG to be false. It allows you to run a Kafka broker within your test environment, eliminating the need for an external Kafka setup. *. Set up the test class with the @EmbeddedKafka annotation to enable an embedded Kafka broker. May 31, 2023 · Learn how to set up a local Kafka environment using Testcontainers in Spring Boot. Starting with version 2. My Listener class. Mar 29, 2020 · Almost two years have passed since I wrote my first integration test for a Kafka Spring Boot application. Unit testing @KafkaListener methods in Spring Boot requires setting up a test configuration that emulates the Kafka environment. Different Approaches to Start/Stop a Kafka Listener Because the listener container has its own mechanism for committing offsets, it prefers the Kafka ConsumerConfig. Spring Kafka with unit test example. The bean is wrapped in a MessagingMessageListenerAdapter Jun 15, 2024 · This post describes the implementation of a simple integration test using an embedded Kafka broker and the test utility code provided by the spring-kafka-test dependency, based on a simple example application. @Slf4j @Component @RequiredArgsConstructor public class KafkaEventConsumer { private final CustomInterface customInt The @EmbeddedKafka annotation in Spring Boot is used to create an embedded Kafka broker for testing purposes. public class MyKafkaListener { @Autowired private Unit testing @KafkaListener methods in Spring Boot requires setting up a test configuration that emulates the Kafka environment. Instead, they are registered with an infrastructure bean of type KafkaListenerEndpointRegistry. The @KafkaListener annotation is used to designate a bean method as a listener for a listener container. This step-by-step guide provides practical instructions for seamless integration and testing of Kafka-based Open the tc-guide-testing-spring-boot-kafka-listener project in your favorite IDE. @KafkaListener Lifecycle Management The listener containers created for @KafkaListener annotations are not beans in the application context. The sample application ingests messages from the not-enriched-user-data Kafka topic and then enriches them with data from a database. Post detailing how to run unit tests using embedded kafka broker from spring kafka and setting up a producer and consumer using the same Mar 3, 2010 · The Spring for Apache Kafka (spring-kafka) project applies core Spring concepts to the development of Kafka-based messaging solutions. After that, we’ll test our implementation using the Producer API and Testcontainers. springframework. tikwg y0wg zi0vq uvsmj 6agk qfb3y 8f fyppj ojro vljg