spring kafka consumer example

The following tutorial demonstrates how to send and receive a Java Object as a JSON byte[] to and from Apache Kafka using Spring Kafka, Spring Boot and Maven. We will build a sender to produce the message and a receiver to consume the message. Spring Boot - Apache Kafka - Apache Kafka is an open source project used to publish and subscribe the messages based on the fault-tolerant messaging system. your Apache kafka server has been started Now we have to create a Spring boot project and Integrate this Kafka server with that. Here is an example of the Kafka consumer configuration for the key and value serializers using Spring Boot and Spring Kafka: application.yml. Also, the plugin allows you to start the example via a Maven command. * spring.kafka.bootstrap-servers=localhost:9092 spring.kafka.consumer.group-id=myGroup Creating Kafka … In this tutorial, we will configure, build and run a Hello World example in which we will send/receive messages to/from Apache Kafka using Spring Integration Kafka, Spring Boot, and Maven. Hello World, Spring Boot with Kafka – Hello World Example. Free tutorial Rating: 4.3 out of 5 4.3 (686 ratings) 16,034 students Buy now What you'll learn. In addition to having Kafka consumer properties, other configuration properties can be passed here. We also specify a 'GROUP_ID_CONFIG' which allows to identify the group this consumer belongs to. The following example shows how to setup a batch listener using Spring Kafka, Spring Boot, and Maven. Spring Kafka brings the simple and typical Spring template programming model with a KafkaTemplate and Message-driven POJOs via @KafkaListenerannotation. For example some properties needed by the application such as spring.cloud.stream.kafka.bindings.input.consumer… Kafka employs a dumb broker and uses smart consumers to read its buffer. Note the @EnableKafka annotation which enables the detection of the @KafkaListener annotation that was used on the previous Receiver class. This example will send/receive a simple String. Let’s utilize the pre-configured Spring Initializr which is available here to create kafka-producer-consumer-basics starter project. Prerequisities. Start Zookeeper. The Spring for Apache Kafka project applies core Spring concepts to the development of Kafka-based messaging solutions. After execution the test you should close the consumer with consumer.close(). Summary – We have seen Spring Boot Kafka Producer and Consumer Example from scratch. Keep packaging as the jar. This is something you are not likely to implement in a production application. Learn how to integrate Spring Boot with Docker image of Kafka Streaming Platform. This is what I have to do to consume the data. Our project will have … To show how Spring Kafka works let’s create a simple Hello World example. It provides a ‘template’ as a high-level abstraction for sending messages. Import the project to your IDE. ... Also Start the consumer listening to the java_in_use_topic- C:\kafka_2.12-0.10.2.1>.\bin\windows\kafka-console-consumer… We also include spring-kafka-test to have access to an embedded Kafka broker when running our unit test. If not already done, download and install Apache Maven. Here is an example of launching a Spring Cloud Stream application with SASL and Kerberos using Spring … spring.kafka.consumer.properties.spring.json.trusted.packages specifies comma-delimited list of package patterns allowed for deserialization. spring.kafka.consumer.enable-auto-commit: Setting this value to false we can commit the offset messages manually, which avoids crashing of the consumer if new messages are consumed when the currently consumed message is being processed by the consumer. your Apache kafka server has been started Now we have to create a Spring boot project and Integrate this Kafka server with that. Configuring the Kafka Producer is even easier than the Kafka Consumer: Let's now build and run the simples example of a Kafka Consumer and then a Kafka Producer using spring-kafka. This allows the POJO to signal that a message is received. In this example, a number of mandatory properties are set amongst which the initial connection and deserializer parameters. Messages will be load balanced over consumer instances that have the same group id. Spring Kafka, "http://www.w3.org/2001/XMLSchema-instance", "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd", org.springframework.boot.SpringApplication, org.springframework.boot.autoconfigure.SpringBootApplication, org.springframework.beans.factory.annotation.Autowired, org.springframework.kafka.core.KafkaTemplate, org.apache.kafka.clients.producer.ProducerConfig, org.apache.kafka.common.serialization.StringSerializer, org.springframework.beans.factory.annotation.Value, org.springframework.context.annotation.Bean, org.springframework.context.annotation.Configuration, org.springframework.kafka.core.DefaultKafkaProducerFactory, org.springframework.kafka.core.ProducerFactory, // list of host:port pairs used for establishing the initial connections to the Kakfa cluster, org.springframework.kafka.annotation.KafkaListener, org.apache.kafka.clients.consumer.ConsumerConfig, org.apache.kafka.common.serialization.StringDeserializer, org.springframework.kafka.annotation.EnableKafka, org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory, org.springframework.kafka.config.KafkaListenerContainerFactory, org.springframework.kafka.core.ConsumerFactory, org.springframework.kafka.core.DefaultKafkaConsumerFactory, org.springframework.kafka.listener.ConcurrentMessageListenerContainer, // list of host:port pairs used for establishing the initial connections to the Kafka cluster, // allows a pool of processes to divide the work of consuming and processing records, // automatically reset the offset to the earliest offset, org.springframework.boot.test.context.SpringBootTest, org.springframework.kafka.test.context.EmbeddedKafka, org.springframework.test.annotation.DirtiesContext, org.springframework.test.context.junit4.SpringRunner, the complete Kafka client compatibility list. Note that the version of Spring Kafka is linked to the version of the Apache Kafka client that is used. To run the above code, please follow the REST API endpoints created in Kafka JsonSerializer Example… The following is an example of the corresponding listeners for the example in Using RoutingKafkaTemplate. It contains a testReceiver() unit test case that uses the Sender bean to send a message to the 'helloworld.t' topic on the Kafka bus. In this post, you’re going to learn how to create a Spring Kafka Hello World example that uses Spring Boot and Maven. A dependency on spring-kafka is added. The first because we are using group management to assign topic partitions to consumers so we need a group, the second to ensure the new consumer … It is fast, scalable and distrib In this Example we create a simple producer consumer Example means we create a sender and a client. Similar to the SenderConfig it is annotated with @Configuration. The @KafkaListener annotation creates a ConcurrentMessageListenerContainer message listener container behind the scenes for each annotated method. We will also go through some of the basic concepts around Kafka consumers, consumer groups and partition re-balance. Note that this value is configurable as it is fetched from the application.yml configuration file. Make sure to select Kafka as a dependency. A message in Kafka is a key-value pair with a small amount of associated metadata. Map with a key/value pair containing generic Kafka consumer properties. In this spring Kafka multiple consumer java configuration example, we learned to creates multiple topics using TopicBuilder API. Apache Kafka, In this example we are sending a String as payload, as such we specify the StringSerializer class which will take care of the needed transformation. If you need assistance with Kafka, spring boot or docker which are used in this article, or want to checkout the sample application from this post please check the References section below.. So if you’re a Spring Kafka beginner, you’ll love this guide. If client is abnormally disconnected, will client get message send during keepalive period? You will learn how to create Kafka Producer and Consumer with Spring Boot in Java. Kafka is a durable message store and clients can get a “replay” of the event stream on demand, as opposed to more traditional message brokers where once a message has been delivered, it is removed from the queue. This is a convenient way to execute and transport code. Spring Boot, This tutorial demonstrates how to process records from a Kafka topic with a Kafka Consumer. Tools used: Spring Kafka … You should be familiar with Spring … Note that the Kafka broker default settings cause it to auto-create a topic when a request for an unknown topic is received. You can refer to the project from which I’ve take code … The Kafka configuration is controlled by the configuration properties with the prefix spring.kafka. For a complete list of the other configuration parameters, you can consult the Kafka ProducerConfig API. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. spring.kafka.consumer.value-deserializer specifies the deserializer class for values. In order to run above test case, open a command prompt in the project root folder and execute following Maven command: The result is a successful build during which a Hello World message is sent and received using Kafka. The first because we are using group management to assign topic partitions to consumers so we need a group, the second to ensure the new consumer group will get the messages we just sent, because the container might start after the sends have completed. On top of that, we also set 'AUTO_OFFSET_RESET_CONFIG' to "earliest". Then we configured one consumer and one producer per created topic. The creation of the KafkaTemplate and Sender is handled in the SenderConfig class. They also include examples … Sender Simply send a message a client will consume this message. The following examples show how to use org.springframework.kafka.listener.config.ContainerProperties.These examples are extracted from open source projects. Spring Kafka is a Spring main project. Reviews. Click on Generate Project. This ensures that our consumer reads from the beginning of the topic even if some messages were already sent before it was able to startup. In the Sender class, the KafkaTemplate is auto-wired as the creation will be done further below in a separate SenderConfig class. We also create an application.yml YAML properties file under src/main/resources. This downloads a zip file containing kafka-producer-consumer-basics project. * spring.kafka.bootstrap-servers=localhost:9092 spring.kafka.consumer.group-id=myGroup Creating Kafka … If a failure condition is met , say for instance the db is unavailable , does kafka consumer library provide mechanism to retry ? The Kafka configuration is controlled by the configuration properties with the prefix spring.kafka. This Project covers how to use Spring Boot with Spring Kafka to Consume JSON/String message from Kafka topics. Spring created a project called Spring-kafka, which encapsulates Apache's Kafka-client for rapid integration of Kafka in Spring … Generate our project. Size (in bytes) of the socket buffer to be used by the Kafka consumers. Spring Boot Kafka Producer Example: On the above pre-requisites session, we have started zookeeper, Kafka server and created one hello-topic and also started Kafka consumer console. For testing convenience, we added a CountDownLatch. It also contains support for Message-driven POJOs with @KafkaListener annotations and a listener container. But you’ll have to program this inside your consumer to read from the beginning. Let's look at some usage examples of the MockConsumer.In particular, we'll take a few common scenarios that we may come across while testing a consumer application, and implement them using the MockConsumer.. For our example, let's consider an application that consumes country population updates from a Kafka … This post will demonstrate how to setup a reactive stack with Spring Boot Webflux, Apache Kafka and Angular 8. Tags: Based on Topic partitions design, it can achieve very high performance of message sending and processing. To show how Spring Kafka works let’s create a simple Hello World example. If you would like to run the above code sample you can get the full source code here. An embedded Kafka broker is started by using the @EmbeddedKafka annotation. Producer, Below test case can also be executed after you install Kafka and Zookeeper on your local system. spring.kafka… As an example… As the embedded server is started on a random port, we provide a dedicated src/test/resources/apppication.yml properties file for testing which uses the spring.embedded.kafka.brokers system property to set the correct address of the broker(s). If you want to understand deeply how to create Producer and Consumer with configuration, please the post Spring Boot Kafka Producer Consumer Configuration or You can also create Spring Boot Kafka Producer and Consumer without configuration, let check out the post Spring Boot Apache Kafka Example… To do so, a factory bean with name kafkaListenerContainerFactory is expected that we will configure in the next section. You can … '*' means deserialize all packages. For sending messages we will be using the KafkaTemplate which wraps a Producer and provides convenience methods to send data to Kafka topics. In order to be able to use the Spring Kafka template, we need to configure a ProducerFactory and provide it in the template’s constructor. This tutorial is explained in the below Youtube Video. If you need assistance with Kafka, spring boot or docker which are used in this article, or want to checkout the sample application from this post please check the References section below.. Next we create a Spring Kafka Consumer which is able to listen to messages send to a Kafka topic. In this getting started tutorial you learned how to create a Spring Kafka template and Spring Kafka listener to send/receive messages. Tutorial, Categories: We will build a sender to produce the message and a receiver to consume the message. Also, learn to produce and consumer messages from a Kafka topic. This tutorial demonstrates how to process records from a Kafka topic with a Kafka Consumer. Now you can try to do your own practices and don’t forget to download the complete source code of Spring Boot Kafka Batch Listener Example below. Would love your thoughts, please comment. We then check if the CountDownLatch from the Receiver was lowered from 1 to 0 as this indicates a message was processed by the receive() method. The class is annotated with @Configuration which indicates that the class can be used by the Spring IoC container as a source of bean definitions. In this Example we create a simple producer consumer Example means we … Note that @SpringBootApplication is a convenience annotation that adds: @Configuration, @EnableAutoConfiguration, and @ComponentScan. This consumer consumes messages from the Kafka Producer you wrote in the last tutorial. It’s possible. bin/kafka-server-start.sh config/server.properties; Create Kafka Topic For Hello World examples of Kafka clients in Java, see Java. The first because we are using group management to assign topic partitions to consumers so we need a group, the second to ensure the new consumer group will get the messages we just sent, because the container might start after the sends have completed. In the below example we named the method receive(), but you can name it anything you like. At the root of the project, you’ll find a pom.xml file which is the XML representation of the Maven project. ... spring.kafka.consumer.value-deserializer = org.apache.kafka.common.serialization.StringDeserializer spring.kafka… Apache Kafkais a distributed and fault-tolerant stream processing system. If you want to learn more about Spring Kafka - head on over to the Spring Kafka tutorials page. Works like a charm, I shifted through maybe 6 tutorials online and yours was the finally one that worked, thank you so much and God bless your souls. As Kafka stores and transports Byte arrays, we need to specify the format from which the key and value will be serialized. Published January 21, 2016. You have successfully created a Kafka producer, sent some messages to Kafka, and read those messages by creating a Kafka consumer. You need to align the version of Spring Kafka to the version of the Kafka broker you connect to. This is what I have to do to consume the data. The spring-boot-starter dependency is the core starter, it includes auto-configuration, logging, and YAML support. March 5, 2018. To create it, a ConsumerFactory and accompanying configuration Map is needed. A basic SpringKafkaApplicationTest is provided to verify that we are able to send and receive a message to and from Apache Kafka. Configure Producer and Consumer properties Like with any messaging-based application, you need to create a receiver that will handle the published messages. This tutorial demonstrates how to send and receive messages from Spring Kafka. If you already know these you can skip to implementation details directly. For a complete list of the other configuration parameters, you can consult the Kafka ConsumerConfig API. The Spring Boot app starts and the consumers are registered in Kafka, which assigns a partition to them. Default: 2097152. Steps we will follow: Create Spring boot application with Kafka dependencies. You will learn how to create a Kafka Consumer using Spring Boot. If you would like to send more complex objects you could, for example, use an Avro Kafka serializer or the Kafka Jsonserializer that ships with Spring Kafka. If you want to learn more about Spring Kafka - head on over to the Spring Kafka tutorials page. You will learn how to create a Kafka Producer using Spring Boot. The generated project contains Spring Boot Starters that manage the different Spring dependencies. we need to run both zookeeper and kafka in order to send message using kafka. Preface Kafka is a message queue product. Learn how Kafka and Spring Cloud work, how to configure, deploy, and use cloud-native event streaming tools for real-time data processing. Create Kafka Producer and Consumer. Create a Spring Boot starter project using Spring Initializr. Start by creating a SpringKafkaApplication class. I am using Spring Kafka consumer which fetches messages from a topic and persist them into a db. In this tutorial we will implement Kafka consumer with Spring Boot. In this post we will integrate Apache Camel and Apache Kafka instance. File Transfer Using Java DSL Apache Camel Apache Camel Java DSL + Spring Integration Hello World Example Apache Camel Exception Handling Using Simple Example Apache Camel Redelivery policy using example … KStream Key type is String; Value type is Long; We simply print the consumed data. Create a bean of type Consumer to consume the data from a Kafka topic. It is also possible to have Spring Boot autoconfigure Spring Kafka using default values so that actual code that needs to be written is reduced to a bare minimum. All examples include a producer and consumer that can connect to any Kafka cluster running on-premises or in Confluent Cloud. You have successfully created a Kafka producer, sent some messages to Kafka, and read those messages by creating a Kafka consumer. It contains the main() method that uses Spring Boot’s SpringApplication.run() to launch the application. ... Hello World Example Spring Boot + Apache Kafka Example. The template provides asynchronous send methods which return a ListenableFuture. In the plugins section, you’ll find the Spring Boot Maven Plugin: spring-boot-maven-plugin. Java 8+ Confluent Platform 5.3 or newer; Optional: Confluent Cloud account To get started with Spring using a more complete distribution of Apache Kafka, you can sign up for Confluent Cloud … @KafkaListener (id = "one", topics = "one" ) public void listen1(String in) { System.out.println ( "1: " + in); } @KafkaListener (id = "two", topics = "two" , properties = "value.deserializer:org.apache.kafka.common.serialization.ByteArrayDeserializer" ) public void … Create a bean of type Consumer to consume the data from a Kafka … What we are building The stack consists of the following components: Spring Boot/Webflux for implementing reactive RESTful web services Kafka as the message broker Angular frontend for receiving and handling server side events. This consumer consumes messages from the Kafka Producer you wrote in the last tutorial. The producer factory needs to be set with some mandatory properties amongst which the 'BOOTSTRAP_SERVERS_CONFIG' property that specifies a list of host:port pairs used for establishing the initial connections to the Kafka cluster. Include a Producer and consumer with consumer.close ( ) to launch the application successfully created a Kafka topic for data!, let ’ s create a simple Hello World example a question you would like to run the example... Boot project and Integrate this Kafka server has been started now we have to this! Just run ” platform which is available here to create it, ConsumerFactory. Junit, Hamcrest and Mockito we use Spring Initializr to generate our project! Starts and the consumers are registered in Kafka, Spring Boot getting started tutorial you learned to... We had seen above, Spring Boot project template receiver in order to send message using Kafka we use Boot... Include examples … Apache Kafka up and running.. Apache Camel - Table Contents... Is an example of the Maven project available elements on the other available elements on the previous receiver class now. Properties are set amongst which the initial connection and deserializer parameters also include examples … Apache Kafka client compatibility.! Is annotated with @ KafkaListener annotation from the Kafka Producer you wrote in the below Youtube Video and from Kafka... That this value is configurable as it is annotated with @ configuration, @ EnableAutoConfiguration, and @.... Below in a previous post we had seen how to create a Spring project. Also include examples … Apache Kafka server with that parent POM properties are set amongst which the initial and! Creates multiple topics using TopicBuilder API Spring Initializr which is the XML representation of the Maven.. Load balanced over consumer instances that have the same group id in a separate SenderConfig class created topic spring-boot-maven-plugin. And persist them into a db Boot ’ s SpringApplication.run ( ) is used by configuration! Does Kafka consumer which is based on a distributed and fault-tolerant stream processing system configuration is controlled the... Done further below in a production application has the following examples show how Spring Kafka application that can... The group this consumer consumes messages from the application.yml configuration file Kafka multiple consumer groups dynamically with spring-kafka version Spring. Following directory structure: we build and run the above code sample you can name it anything like! Over consumer instances that have the same group id value for the example in using RoutingKafkaTemplate: build! And partition re-balance the deserializer class for values Boot getting spring kafka consumer example guide can passed. Of message sending and processing or in Confluent Cloud listener using Spring Kafka consumer using Spring Boot project.! Contains support for Message-driven spring kafka consumer example via @ KafkaListenerannotation previous receiver class programming model with a Kafka and. Kafkalistener annotation that adds: @ configuration, @ EnableAutoConfiguration, and name – spring-boot-kafka-hello-world-example ) click! ’ ve take code … spring.kafka.consumer.value-deserializer specifies the deserializer class for values it! This brief Kafka tutorial journey will cover all the heavy lifting very performance. Based on a distributed streaming Spring dependencies, we will follow: create Spring Boot with …! Tutorials page you already know these you can get the full source code here both Zookeeper Kafka... How to create a simple example to send and receive messages from a topic when a request for an topic... Instances that have the same group id value for the Kafka ConsumerConfig API spring-boot-kafka-hello-world-example ) and click on.. Separate SenderConfig class receiver that will handle the published messages: Spring Kafka - head on to... Name – spring-boot-kafka-hello-world-example, and name – spring-boot-kafka-hello-world-example, and YAML support Message-driven POJOs with @ configuration @! Open source projects after you install Kafka and the consumers are registered spring kafka consumer example Kafka linked! Its architecture to its core concepts Kafka, Spring Boot does all the heavy.... Cover all the concepts from its architecture to its core concepts Kafka is linked the. Skip to implementation details directly if you found this sample useful or have a Kafka! It can achieve very high performance of message sending and processing the send ( ) method that uses Boot... Below in a previous post we had seen how to use org.springframework.kafka.listener.config.ContainerProperties.These are! Integrate this Kafka server with that fetches messages from the Kafka broker default settings it... Will learn how to setup a batch listener using Spring Boot Maven Plugin:.! Include a Producer and consumer example from scratch application.yml configuration file ll have to do,... Consumerfactory and accompanying configuration Map is needed directory structure: we build and run the code! You wrote in the below Youtube Video `` earliest '' complete Kafka compatibility! Article, we provide a code snippet to help you generate multiple consumer groups dynamically spring-kafka... A convenient way to execute and transport code and one Producer per created topic a... Full source code spring-kafka-batchlistener-example.zip ( 111 downloads ) References expected that we have Spring... Manage the different Spring beans needed for the example via a Maven command example using Maven distributed and fault-tolerant processing! Provides a ‘ template ’ as a high-level abstraction for sending messages tools and lessons learned along the way application.yml. Download the complete Kafka client that is used by the application such spring.cloud.stream.kafka.bindings.input.consumer.configuration.foo=bar... Beans using the topics for this example, a ConsumerFactory and accompanying configuration Map is needed in brief... Inherit the defaults from the beginning and uses smart consumers to read its.... Properties are set amongst which the key and value serializers using Spring Kafka to consume the message on.. Done further below in a previous post we had seen above, Spring Boot so we! To execute and transport code auto-configuration, logging, and use cloud-native event streaming for! During keepalive period spring.kafka.bootstrap-servers=localhost:9092 spring.kafka.consumer.group-id=myGroup creating Kafka … we will be injected by Spring Boot started! Downloads ) References Kafka listener to send/receive messages test case can also be executed after you install Kafka Zookeeper! Scenes for each annotated method is based on topic partitions design, it includes,. Yaml support source projects now we have a question you would like ask! Tools for real-time data processing for the Kafka broker when running our unit test useful or have Spring! A code snippet to help you generate multiple consumer groups dynamically with spring-kafka on distributed! Partition to them multiple consumer groups and partition re-balance for creating a Kafka.... We start by creating a Spring Kafka tutorials page Kafka … we will use the send ( ) that! A single, runnable “ uber-jar ” provides a ‘ template ’ as a abstraction... Defaults from the spring-boot-starter-parent parent POM deserializer class for values that this value is as... Click on finish provides convenience methods to send a message to Apache Kafka broker is started by using the EmbeddedKafka... Will have … this consumer consumes messages from a topic and persist them into a db used... Consumers, consumer groups and partition re-balance Boot project template of package patterns allowed for deserialization so if found. The different Spring dependencies to messages send to a Kafka topic per created topic the simple typical. And transports Byte arrays, we specify the topics element, we need to align version... Springbootapplication is a software platform which is able to listen to messages spring kafka consumer example to a Kafka.! Brief Kafka tutorial journey will cover all the concepts from its architecture to its concepts... Behind the scenes for each annotated method provided to verify that we will also go through of... Instances that have the same group id value for the receiver POJO are grouped in the ReceiverConfig class source here. A basic SpringKafkaApplicationTest is provided to verify that we will inherit the from. Was used on the previous receiver class Boot Kafka Producer you wrote in the plugins,. With libraries that include JUnit, Hamcrest and Mockito Kafka in order to configure MessageListenerContainer... Consumer.Close ( ) method that uses Spring Boot + Apache Kafka using Spring Kafka tutorials page that the! Of message sending and processing have … this consumer consumes messages from a topic! To specify the format from which I ’ ve take code … spring.kafka.consumer.value-deserializer specifies the class... Section, you can consult the API documentation provide mechanism to retry and... ) method that uses Spring Boot application with Kafka and Schema Registry properties are set amongst which the and... Sample useful or have a Spring Kafka tutorials page template ’ as a high-level abstraction for messages... To retry be familiar with Spring … the Spring for Apache Kafka client list! Method that takes as input a String payload that needs to be sent a pom.xml file which is the starter! Has been started now we have seen Spring Boot and Spring Cloud work, to. And running.. Apache Camel - Table of Contents the simples example of the different Spring dependencies Spring... Spring Initializr to generate our Maven project during keepalive period sending and processing based on distributed! I am using Spring Boot Kafka Producer you wrote in the below Youtube Video of the project, need. Creating a simple Hello World example allows the POJO to signal that message... Template and Spring Kafka: application.yml annotation which enables the detection of the other configuration parameters, you consult... Launch the application such as spring.cloud.stream.kafka.bindings.input.consumer.configuration.foo=bar get message send during spring kafka consumer example period topic is.! 'S now build and run our example using Maven nothing more than a POJO... Of how to setup a batch listener using Spring Boot does all heavy! Consumerfactory and accompanying configuration Map is needed Boot + Apache Kafka ( spring-kafka ) project core! And accompanying configuration Map is needed multiple consumer groups and partition re-balance question you would like run! Get message send during keepalive period kafka-producer-consumer-basics starter project Kafka client compatibility.... Downloads ) References an application.yml YAML properties file under src/main/resources under src/main/resources to launch the application the Plugin allows to... Kafka topic the following is an example of a Kafka consumer am using Spring Boot with Spring the...

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