Test kafka listener spring boot

Test kafka listener spring boot. We ran the test cases in both apps to certify Jan 4, 2019 · Normally, you can't reference fields or properties from the bean in which the SpEL is declared. 8. Let’s demonstrate how these test utilities can be used with a Nov 11, 2020 · *****Updated code, i am unable to use bootstrapServersProperty ="spring. Sep 18, 2018 · Kafka parallelism works with consumers having different group id, in spring kafka however there will be multiple thread dealing with the execution of the @KafkaListener. Click generate and import into your IDE. example. Step 3: Assert produced data and REST API response. Simple embedded Kafka test example with spring boot. a subclass) to write to the DLQ and seek the current offset (and other unprocessed) if the DLQ write fails, and seek just the remaining records if the DLQ Apr 30, 2023 · By piotr. Docker Compose Support ( Optional ). While running this test case, I see that the Consumer is not reading the message from the topic and the "assertTrue" check fails. 7. 56. Jun 13, 2022 · Approach. In this scenario, we will create two rest endpoints, one to read reviews stored in MongoDB and one to post a review. @EnableKafka. io it automatically adds all necessary dependency entries into the maven or gradle file. I'm able to produce message to spring embedded Kafka server but instead of test listener the listener in service class is trying to consume the records and. Jun 28, 2017 · Solved this issue in spring boot 2. Mar 28, 2020 · Here is my listener code looks like. setCommitLogLevel(LogIfLevelEnabled. Spring Messaging Message Conversion. common. First, you need to set autoStartup to false and give your container a name. When only loading the consumer class, the May 8, 2023 · Conclusion. The following class and test are located in the "root" module of the application and it's working perfect. First, we need to add the application yml configuration. Jun 7, 2022 · Since you are using Spring Boot, just set the value deserializer class name as a property and Boot will automatically wire it into the container factory for your @KafkaListener. Testing a Kafka Consumer. acme. Generate Project Template. CustomDeserializer Jul 27, 2022 · I have a spring boot test to check if a kafka consumer listens for a message in specific topic. Kafka Listener started: 2. listener(record); May 7, 2018 · 2. The spring-kafka-test jar contains some useful utilities to assist with testing your applications. Create a Spring Boot application with Kafka integration. And use KafkaListener for get message. I have tried multiple ways: EmbeddedKafka annotation EmbeddedKafkaRule EmbeddedKafkaBroker etc Nov 23, 2021 · Spring KafkaTestUtils: wait until message in topic would be consumed. With the first approach, it is not necessary to use a DeadLetterPublishingRecoverer, you can use any ConsumerRecordRecoverer that you want; in fact the default recoverer simply logs the failed message. We provide a “template” as a high-level abstraction for sending messages. concurrency : 2. kafka:spring-kafka:3. Just remove yours and auto wire the default one. Jan 24, 2020 · 1 Answer. These listeners can be used, for example, to create and bind a Micrometer. commit=true. When trying to implement a Unit-test in a spring-boot application, I can't retrieve a ConsumerRecord, though a custom Serializer using an own POJO is working. Ah; so you are using @KafkaListener - the problem is you are looking at the wrong registry - you don't need to define one; the framework declares one with a bean name KafkaListenerConfigUtils. https://forms. I am trying to write an integration test to make sure that events are sent and received. 5) Jun 2, 2020 · 2 Answers. 1 of Spring Kafka, @KafkaListener methods can be configured to receive a batch of consumer records from the consumer poll operation. 4. ack-mode=manual-immediate in this properties however because it's my custom Sep 29, 2023 · 2. registry. Level. Oct 8, 2021 · I am using Spring Boot @kafkaListener in my application. @Autowired. consumer. debug("processing payload: '{}' ", payload); // business logic here. Keep in mind that @TestInstance should be used with special consideration. seekToBeginning () when you get partitions assigned in Starting with version 1. Here are my Consumer settings in main folder: spring. ms= schema. sending data = 0. Topic Partitions : 2. It provides a "template" as a high-level abstraction for sending messages. You can use the same technique (e. java, there are a couple of hints. Apr 15, 2019 · I have a spring component with @KafkaListener method: @Slf4j @Component public class ResponseHandler { private final ResponseMessageService responseMessageService; public ResponseHandler( Jan 8, 2024 · Furthermore, Kafka provides a MockProducer that implements the same Producer interface and mocks all I/O operations implemented in the KafkaProducer: @Test void givenKeyValue_whenSend_thenVerifyHistory() {. demotestcontainers. Your MessageConverter ( StringJsonMessageConverter) converts these String messages to your type MetadataFileIntegrationDTO (determined by params in @KafkaListener) So when you defined your Oct 19, 2020 · Starting with version 2. KAFKA_LISTENER_ENDPOINT_REGISTRY_BEAN_NAME. If you don't want to use a @kafkalistener, then you need to go a direction with the manual KafkaListenerContainer creation. Java. I see that all configs work, I see my 10 threads in jmx: But then I make such test: @KafkaListener(topics = {. 6 (Spring Kafka 2. springframework Feb 21, 2018 · PROBLEM. Sep 1, 2019 · I will use Maven, Spring Boot, and Spring Kafka in the main project, and I will depend on the ‘spring kafka test’ in the test project. However, @KafkaListener has special syntax to support it. concurrency=10. 5. log. timeout. See the documentation. Consuming data from Kafka consists of two main steps. url= auto. The generated project has the following dependencies in pom. , postgraduate (MCA), and having 5+ years of experience in JavaSE, JavaEE, ORM framework, Spring, Spring-boot, RESTful Web Services, Kafka, MQTT, Rabbitmq, Docker, Redis, MySQL, Maven, GIT, etc. 0. Previously, we ran command-line tools to create topics in Kafka: $ bin/kafka-topics. No need to define your own consumer factory or container factory. Lets assume I use below configuration -. Listener for handling outbound Kafka messages. Additionally, we will also learn to handle Kafka errors and retry in case of failures. Consumer application (Spring Service) will consume that message and store that review in MongoDB. auto. Kafka Listener received message: 3. spring. Spring Boot allows to exclude classes from scanning by creating custom TypeExcludeFilter. } In my test code I use KafkaProducer<String, String> producer; to send messages to specific The Spring for Apache Kafka project applies core Spring concepts to the development of Kafka-based messaging solutions. We’ll learn the configurable properties that can directly impact how many messages the Kafka Consumer reads at once. Kafka Listener Method Apr 10, 2019 · TEST CASE 1 : PASS I started my spring/java producer and run the consumer from console. Oct 15, 2020 · The first integration test. bootstrap-servers on EmbeddedKafka as it keeps trying to go to localhost:9092 and timesout Here is my config for the test file Annotation Interface KafkaListener. Sep 20, 2017 · 1. Jun 14, 2023 · The @KafkaListener and @KafkaHandler annotations are part of Spring for Apache Kafka integration. Jan 8, 2024 · Kafka Streams is a client-side library built on top of Apache Kafka. @ExtendWith (MockitoExtension. Jul 27, 2022 · class ProducerControllerTest {. Sample project to show how to implement Integration Test in Spring Boot. 5. I checked it with the kafka-console-consumer, where a new message is each and every time I run the test generated and appears on the console. This is a void type of method. I want to know that if a kafka message is sent to it's topic, the listener method was called correctly. There are no other errors. MySQL. Testing Applications. When you use a message listener container, you must provide a listener to receive data. offset. Consumer. This article will teach you how to configure concurrency for Kafka consumers with Spring Boot and Spring for Kafka. I'm trying to unit test a kafka consumer class, in Spring. The test is green when run in IDE or from command line without other tests, like mvn test -Dtest=KafkaPublisherTest. That’s because we typically want to consume data continuously. Nov 28, 2021 · I have 2 Spring Boot apps, one is Kafka publisher and the other is consumer. Let’s see how the test application can be used with a factory. You're setting the ack-mode and auto-offset-reset in the properties file, which is used by Spring Boot 's auto configuration to setup its own KafkaListenerContainerFactory. Nov 26, 2020 · Spark Programming and Azure Databricks ILT Master Class by Prashant Kumar Pandey - Fill out the google form for Course inquiry. kafka. Records can only be filtered with a batch listener if the <List<?>> form of listener is used. Kafka Listener stopped: Conclusion. In this guide you will learn how to. 3. ConsumerRecord<String, String> record = new ConsumerRecord<>("topic", 0, 123L, "key", "value"); messageConsumer. class) public class MessageConsumerTest {. This deserializer delegates to a real deserializer (key or value). Sep 16, 2023 · I'm having a hard time trying to figure it out how to make a test to pass inside a module in a Spring Boot app written in Kotlin. 2. When running my unit test I can see outputs suggesting that my producer and consumer are working correctly in the console. ms= session. 1:9092". @PostMapping(path = "/send/message/{text}") public void sendFoo(@PathVariable String text) { this. MockProducer mockProducer = new MockProducer <>( true, new StringSerializer (), new StringSerializer ()); Message Listeners. However, for historic reasons, Kafka (and Java) still refer to “SSL” and we’ll be Jun 3, 2021 · Creating Spring-Boot API. The kafka listener is triggered when using @SpringBootTest. The first test will use JUnit5 and the Java HTTP client to send a request to the /dosomething endpoint. enabled= Here is the config: Oct 23, 2019 · I would like to write an integration test for whole kafka flow. To test connectivity from the same host, we will use a non-Dockerized Kafka console producer: kafka-console-producer --bootstrap-server localhost:29092 --topic test_topic_2 >hi >there Jan 20, 2020 · So, the kafka configs works, and everything works, but I need to create one intregration test for this code, and I have no idea how. But i do not how to get the consumer for the group. Secure Sockets Layer (SSL) has actually been deprecated and replaced with Transport Layer Security (TLS) since 2015. , or in the listener itself. Mar 25, 2020 · My problem is Caused by: java. It ends quickly with a log, where not part of it is a line I've written: Starting with version 2. RECORD. In my integration test i send data to 2 topics, and they should be consumed by application by the order. 2 introduced the ErrorHandlingDeserializer. public interface ProducerListener<K,V>. springframework. This makes the library instantiate N consumers (N threads), which all call the same KafkaListener that you define, effectively making your processing code multi-threaded. In the folder with the tests, I create application. Starting with version 3. kafka </groupId> <artifactId> spring-kafka </artifactId> </dependency>. lang. It enables the processing of an unbounded stream of events in a declarative manner. " GitHub is where people build software. tạo một project spring boot từ spring starter, có cấu trúc source code như sau. KafkaProducerConfigTest Config class with all beans. They provide convenient ways to consume and handle messages from Kafka topics. When an exception occurs, it seeks the consumer so that all unprocessed records are redelivered on the next poll. I'm trying integration testing using spring-boot and spring embedded Kafka. In this tutorial, we’ll explore how the Kafka Consumer retrieves messages from the broker. We’ll be focusing on setting up a KafkaConsumer without relying on Spring Boot modules. gle/Nxk8dQUPq4o Jan 24, 2024 · Therefore, we simply need to add the module dependency: <dependency> <groupId> org. Looking at KafkaAutoConfiguration. class}). I am attempting to unit test a kafka producer that sends an Integer. When a deserializer fails to deserialize a message, Spring has no way to handle the problem because it occurs before the poll () returns. Although the Serializer and Deserializer API is quite simple and flexible from the low-level Kafka Consumer and Producer perspective, you might need more flexibility at the Spring Messaging level, when using either @KafkaListener or Spring Integration’s Apache Kafka Support . Apache Kafka, Spring Boot. All we need to do is add @EmbeddedKafka annotation with listed topics and partitions. Jul 16, 2018 · The @kafkalistener doesn't work with Kafka Streams. If your application uses the Kafka binder in spring-cloud-stream and if you want to use an embedded broker for tests, you must remove the spring-cloud-stream-test-support dependency, because it replaces the real binder with a The Spring for Apache Kafka (spring-kafka) project applies core Spring concepts to the development of Kafka-based messaging solutions. And i want to test it. See the SeekToCurrentErrorHandler. Its main goal is to provide a stateless singleton delegate for Callback s, which, in all but the most trivial cases, requires creating a separate instance Mar 11, 2024 · In this tutorial, we’ll cover the basic setup for connecting a Spring Boot client to an Apache Kafka broker using SSL authentication. BOOTSTRAP_SERVERS_CONFIG, bootstrapServers); props. Finally, we’ll explore how adjusting these settings affects the Consumer ‘s behavior. The test will then verify that the request was accepted successfully and will then check that 5 events have been published and that the events are in sequential order: @Test. private KafkaListenerEndpointRegistry kafkaListenerEndpointRegistry; @Value("${start. The containerFactory () identifies the KafkaListenerContainerFactory to use to build the Kafka listener container. We also provide support for Message-driven POJOs. After that, we’ll test our implementation using the Producer API and Testcontainers. . So, I'm not sure what is that ack var for. Spring Boot also provides auto-configuration options Mar 11, 2021 · Confluent Kafka Avro deserializer for spring boot kafka listener. By default, records are filtered one-at-a-time; starting with version 2. In this section of the tutorial, we will learn how to create Kafka Producer and Consumer in Spring Boot Kafka project. Testing Spring Boot Kafka Listener using Testcontainers. properties looks like (only listing config for one consumer here): kafka. Apache Kafka is a distributed and fault-tolerant stream processing system. It is for plain Consumer. Firstly, we have to subscribe to topics or assign topic partitions manually. With Spring Kafka and EmbeddedKafka. When i send my messages in test, it sends really rapidly, at the same time. A more advanced configuration of the Spring for Kafka library sets the concurrency setting to more than 1. 2. So, thread 1 consumed the batch of records and thread 2 Jan 6, 2020 · I am trying to build a simple spring boot Kafka Consumer to consume messages from a kafka topic, however no messages get consumed as the KafkaListener method is not getting triggered. interval. RELEASE. send(TOPIC_NAME, text); } the terminal should show the initialization of the Spring DispatcherServlet and show the message. At first - userTopic, then shoud be consumed userOrderTopic. In this article, we looked at some best practices for exception handling and data loss prevention with Spring Boot. By now it comes with JUnit 5 as well, so you are ready to go. Example with Spring Boot 2. – Gary Russell. Starting with version 2. The following listing shows these interfaces: public interface AcknowledgingMessageListener<K, V> { void onMessage(ConsumerRecord<K, V> data, Acknowledgment Nov 24, 2018 · The Spring Kafka project comes with a spring-kafka-test JAR that contains a number of useful utilities to assist you with your application unit testing. @KafkaListener(id="test",topics={"test"},groupId="group",containerFactory="batchContainerFactory") public String listenTopic33(List<ConsumerRecord<Integer Jul 19, 2019 · I am trying to create a Kafka Consumer for a topic without using the @KafkaListener annotation. These include an embedded Kafka broker, some static methods to setup consumers/producers and utility methods to fetch results. To associate your repository with the spring-kafka-test topic, visit your repo's landing page and select "manage topics. topics= bootstrap. /**. Oct 18, 2021 · Bước 2: dựng project và cấu hình. Annotation that marks a method to be the target of a Kafka message listener on the specified topics. Get the code. This article assumes that the server is started using the default configuration and that no server ports are changed. publisher and listener. template. enable-auto-commit=false spring. I need to test Kafka Consumer. Oct 17, 2021 · Written by Abid Khan. This is what the kafka. In this tutorial, we’ll cover Spring support for Kafka and the level of abstraction it provides over native Kafka Java client APIs. 8, you can override filterBatch to filter the entire batch in one call. Two implementations are provided: EmbeddedKafkaZKBroker - legacy implementation which starts an embedded Zookeeper instance. properties without the use of spring boot. id= enable. annotation. In my production code I have: @KafkaListener(topics = "myTopic") public void listen(@Payload String payload) {. Apr 30, 2019 · Use ErrorHandlingDeserializer. When I produce message form producer my console consumer is able to access the message. pom. demo-testconstainers->src->main->kotlin->com. props. So yes performance can increase if you define the listener programatically with different group id per partition Apr 9, 2022 · Step 1: Create a Kafka producer and produce data on the specified topic. You have some mix of raw Spring Kafka configuration and Spring Boot. Remember that the @Component annotation tells Spring Boot Jan 10, 2024 · Overview. He is a well-developed professional with a prolific track record of designing Spring Initializr now automatically adds the spring-kafka-test dependency in test scope to the project configuration. The Kafka Stream can be managed via StreamsBuilderFactoryBean and particular @Bean for the KStream. When Users/Applications will invoke post review API, it will produce one message on Kafka. out. topics. Spring Initializr now automatically adds the spring-kafka-test dependency in test scope to the project configuration. To create Spring Boot Kafka project, we must generate a blank Spring Boot project template using Spring Initializr with all the required dependencies. 5, you can apply an initial offset to all assigned partitions: partitionOffsets = @PartitionOffset(partition = "*", initialOffset = "0")) }) Another way is to implement an AbstractConsumerSeekAware for your @KafkaListener class and call that ConsumerSeekCallback. Some real-life examples of streaming data could be sensor data, stock market event streams, and system logs. Spring AMQP provides a similar feature set for the Advanced Message Queuing Protocol. xml. Let’s leverage this annotation to create the Aug 6, 2022 · 1 Answer. Jan 7, 2024 · Overview. key-deserializer=org. 9 Spring-boot application using among its dependencies: org. listener. Spring Boot. 2 and its Spring-Kafka dependency. apache. Acknowledgement : Manual. 4, you can now set the listenerInfo property on the listener container, or set the info attribute on the @KafkaListener annotation. That is the producer is sending a value of zero, the consumer received zero, and totaled that integer with the running total. Abid Khan is a Lead Consultant at Knoldus Inc. I saw in other answers to make sure that AUTO_OFFSET_RESET_CONFIG is set to "earliest" and that the GROUP_ID_CONFIG is unique which I did, however still the Sep 24, 2023 · Boot's auto configured factory uses the spring. value-deserializer=com. ack-mode=manual Set ack-mode to manual or manual_immediate, based on your use case. If your application uses the Kafka binder in spring-cloud-stream and if you want to use an embedded broker for tests, you must remove the spring-cloud-stream-test-support dependency, because it replaces the real binder with a Jan 8, 2024 · 2. Nov 17, 2021 · Spring doesn't "look" for any Kafka or serializer properties; it just supplies them to the Kafka clients from the properties. Spring Boot receives the request and send the message to the Topic queue in Kafka. property in which I describe the Producer. The app should ideally be started when the Kafka messages need to be processed and stopped as soon as that process is complete. We will also look at how to configure Kafka Producer and Consumer and look at diverse ways to produce and consume messages. g. Learn to create a Spring boot application and run a local Apache Kafka broker instance using Docker Compose. My KafkaConsumer. It is needed if you plan to use a local Kafka installation running on a Docker container. This module enables us to use the @KafkaListener annotation, an abstraction over Kafka’s Consumer API. Jan 30, 2019 · I have configured several Kafka consumers in Spring Boot. bootstrap-servers property set up in the test, but yours is hard coded to "127. StringDeserializer. 1. Jan 8, 2024 · Our example application will be a Spring Boot application. As per my knowledge Concurrency will create parallel thread to consume message. Jun 13, 2019 · 3. Spring Web. spring. put(ProducerConfig. It also provides an instance of EmbeddedKafkaBroker bean that we can inject and use in our test. Secondly, KafkaTemplate bean will be created using our Feb 19, 2019 · 1. First of all, it is possible to override ProducerListener bean with our own. The Spring Team provides Spring for Apache Kafka dependency to work with the development of Kafka-based messaging solutions. myTopic}") public void myKafkaMessageEvent(final String message) { When you select Spring for Apache Kafka at start. Thực hiện việc cấu hình producer và consumer ở file KafkaConfiguration. Aug 8, 2021 · 1 Answer. Aug 24, 2020 · Testing listener with @EmbeddedKafka from spring-kafka-test. consumer}") private boolean shouldStart; 6 days ago · The Spring Framework provides extensive support for integrating with messaging systems, from simplified use of the JMS API using JmsTemplate to a complete infrastructure to receive messages asynchronously. This means that Spring will manage the lifecycle of the beans, dependency injection, and so on. getContainerProperties(). See @KafkaListener on a Class . Maven. Then you need to start it manually based on a flag using @EventListener. Mock the Nov 13, 2020 · Vertically scale your Kafka consumers. Step 2: Make a REST API call to fetch the data that has been produced to Kafka previously. Jan 8, 2024 · Overview. Secondly, we poll batches of records using the poll method. TEST CASE 2 : FAILED I started my spring/java consumer and run the producer from console. Kafka. To disable Kafka listeners, exclude all classes that have methods annotated with @KafkaListener or @KafkaHandler: private static final String KAFKA_LISTENER = "org. If you want to learn more about Spring Kafka - head on over to the Spring Kafka Kafka ConsumerRecord returns null. group-id : TEST_GRP_ID. In this tutorial, we use Kafka as a messaging system to send messages between Producers and Consumers. * Construct an instance with the default recoverer which simply logs the record after. It’s a good practice to constrain your Kafka listener to utilize it efficiently. sh --create \. commit= auto. You still don't have Acknowledgment arg in your receive() method. Aug 11, 2022 · I have to write it in Mockito only. What are drawbacks of testing using embedded kafka VS testing with test containers kafka? Im familliar with testcontainers, it provides fully dunctional kafka. By Feb 27, 2024 · 1. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. INFO); return factory; } And spring boot config: spring. KEY_SERIALIZER_CLASS_CONFIG Mar 27, 2018 · 9. IllegalStateException: No Acknowledgment available as an argument, the listener container must have a MANUAL AckMode to populate the Acknowledgment however I have already set it in properties file spring. Create Producer and Consumer Application. bootstrap-servers=localhost:29092. BATCH) or after each record is processed AckMode. reset= kafka. In this tutorial, we’ll learn how to create a Kafka listener and consume messages from a topic using Kafka’s Consumer API. Is it best practice to parse the data into object(as I mapped the payload to a TEST object) and filter the data based on the value which I need to filter or Does kafka provides any other libraries which I can make use of this filtering process. Mar 12, 2024 · 1. A KafkaMessageListenerContainer is how Spring Boot connects and polls records from Kafka under the hood. 9. properties. Jul 7, 2018 · I am using Spring Boot 2. Further Reading. System. I want to do this because I am trying to dynamically create listeners based on the application. If not set, a default container factory is assumed to be available with a bean name of Jan 17, 2022 · 2. @SpringBootTest is used to run a Spring Boot-based test. Configuring Topics. However, if you have an older project you might need to add the spring-kafka-test dependency: <dependency> <groupId> org. Then, the container will add this in the KafkaListener. minkowski April 30, 2023 15. Concurrency in Spring for Kafka is closely related to the Kafka partitions and consumer groups. Sorted by: 2. java. Mar 10, 2021 · I want to write tests for spring kafka producer and consumer. The following example shows how to setup a batch listener using Spring Kafka, Spring Boot, and Maven. Test the Kafka Listener using Testcontainers and Awaitility. 3 by applying the following to application. It's best not to use enable. serialization. @KafkaListener designates a method as a listener in a KafkaMessageListenerContainer. servers= group. It also provides support for Message-driven POJOs with @KafkaListener annotations and a "listener container". Application Context will boot Kafka Broker with provided configuration just like that. 1, you can perform validation in an ErrorHandlingDeserializer instead. Class anothed with component anottation: this. Embedded Kafka Broker. To achieve this test case, I need to create separate containers for PostgreSQL, Kafka, and a container for the Spring Boot Apr 26, 2023 · I start a 2. Test case should be in Mockito. Each consumer within a consumer group can receive messages from multiple partitions. 1. Oct 25, 2023 · In this article, we have implemented unit tests for two Spring Boot Kafka applications: News Producer and News Consumer. What are limitations of embedded kafka compared to container?(Concrete examples pls) Dec 11, 2021 · Native deserializer ( StringDeserializer in your case) deserializes byte [] messages to String messages. But since then you declare your own KafkaListenerContainerFactory bean, auto configuration backs off, and your programatic configuration is used instead. To solve this problem, version 2. Now I want to reset the offset for my group. Spring commits the offsets in a more deterministic fashion, either after all the records from a poll have been processed (default - AckMode. There are currently eight supported interfaces for message listeners. 11, validation now works on payloads for @KafkaHandler methods in a class-level listener. Copy. Exactly one of its methods will be invoked, depending on whether the write has been acknowledged or not. poll () returns these String messages. You don't show a KafkaTemplate anywhere in the above configuration, so it's not clear what you are talking about. KafkaAutoConfiguration. The polling is usually done in an infinite loop. To receive messages using @KafkaListener, we need to add the latest version Spring Kafka module, if not included already. Data loss prevention is critical for consumer Kafka applications. private final List<String> receivedMessages = new ArrayList<>(); @KafkaListener(topics = "some-ultra-cool-topic") Mar 29, 2021 · I have simple spring boot kafka listener. LISTENER_INFO header to all incoming messages; it can then be used in record interceptors, filters, etc. reactionsService = reactionsService; @KafkaListener(topics = "reaction-topic", clientIdPrefix = "string", groupId = "magpie-trending") Nov 24, 2020 · @EmbeddedKafka is used to provide an in-memory Kafka instance in Spring-based tests. KafkaListener"; private static final String KAFKA Jan 8, 2024 · From the advertised listener property, we know that we have to use the localhost:29092 address to reach Kafka broker. Share Improve this answer Jun 10, 2023 · 2. I'm trying to test listener in springboot created using @KafkaListener But listener always listens on localhost:9092 instead of using this embededKafka. I found the solution. But I just don't want to load all the classes and I only supplied the listener class like this @SpringBootTest (classes= {KafkaConsumerTest. Open Spring initializr and create a Spring boot application with the following dependencies: Spring for Apache Kafka. I use spring-kafka for springboot 2. My consumer class is annotated like this: @KafkaListener(topics = "${kafka. Implement a Kafka Listener and persist data in MySQL database. For this tutorial, we’ll build a simple word-count streaming application. If there is no bean provided for ProducerListener, it will set up LoggingProducerListener by default. println(data); @KafkaListener allows a method to consume messages from Kafka topic (s). commit. ye zg wd fq lr mr uw bf ae tw