That’s pretty much it, we now have successfully sent messages to an Apache Kafka topic using a Spring Boot application. The Kafka configuration is controlled by the configuration properties with the prefix spring.kafka. Over a million developers have joined DZone. 2020-10-02 13:12:14.996 INFO 13586 --- [           main] o.a.k.clients.consumer.ConsumerConfig   : ConsumerConfig values: key.deserializer = class org.apache.kafka.common.serialization.StringDeserializer, partition.assignment.strategy = [org.apache.kafka.clients.consumer.RangeAssignor], value.deserializer = class org.apache.kafka.common.serialization.StringDeserializer. Wanted to setup ACL and test with some spring boot based java client. If your data is PLAINTEXT (by default in Kafka), any of these routers could read the content of the data you’re sending: Now with Encryption enabled and carefully setup SSL certificates, your data is now encrypted and securely transmitted over the network. Your account is fully activated, you now have access to all content. Principalis a Kafka user. Now, let's set up the project. Open cmd, go to till below directory and run below command. bin/zookeeper-server-start.sh config/zookeeper.properties; Start Kafka Server. SCRAM credentials are stored centrally in ZooKeeper. An ACLspecifies which identities are granted which operations on a given object. As an example,… @george2515. It maps each listener name to its security protocol. 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. Let’s go! By this way we can run the app without really sending the messages to Kafka if we did not set the kafka profile. On the other end of the queue, a single Spring Boot application is responsible for handling the request for e-mails of our whole application. Unable to consume Kafka messages within Spring Boot. *: Encryption and authentication in Kafka brokers is configured per listener. SASL authentication is supported both through plain unencrypted connections as well as through TLS connections. 2020-10-02 13:12:15.016 WARN 13586 --- [           main] o.a.k.clients.consumer.ConsumerConfig   : The configuration 'specific.avro.reader' was supplied but isn't a known config. 2020-10-02 13:12:15.016 INFO 13586 --- [           main] o.a.kafka.common.utils.AppInfoParser     : Kafka version: 2.5.1, 2020-10-02 13:12:15.016 INFO 13586 --- [           main] o.a.kafka.common.utils.AppInfoParser     : Kafka commitId: 0efa8fb0f4c73d92, 2020-10-02 13:12:15.016 INFO 13586 --- [           main] o.a.kafka.common.utils.AppInfoParser     : Kafka startTimeMs: 1601624535016, 2020-10-02 13:12:15.017 INFO 13586 --- [           main] o.a.c.i.e.InternalRouteStartupManager   : Route: route2 started and consuming from: kafka://test-topic, 2020-10-02 13:12:15.017 INFO 13586 --- [mer[test-topic]] o.a.camel.component.kafka.KafkaConsumer : Subscribing test-topic-Thread 0 to topic test-topic, 2020-10-02 13:12:15.018 INFO 13586 --- [mer[test-topic]] o.a.k.clients.consumer.KafkaConsumer     : [Consumer clientId=consumer-test-consumer-group-1, groupId=test-consumer-group] Subscribed to topic(s): test-topic, 2020-10-02 13:12:15.020 INFO 13586 --- [           main] o.a.c.impl.engine.AbstractCamelContext   : Total 2 routes, of which 2 are started, 2020-10-02 13:12:15.021 INFO 13586 --- [           main] o.a.c.impl.engine.AbstractCamelContext   : Apache Camel 3.5.0 (camel) started in 0.246 seconds, 2020-10-02 13:12:15.030 INFO 13586 --- [           main] o.a.c.e.kafka.sasl.ssl.Application       : Started Application in 1.721 seconds (JVM running for 1.985), 2020-10-02 13:12:15.034 INFO 13586 --- [extShutdownHook] o.a.c.impl.engine.AbstractCamelContext   : Apache Camel 3.5.0 (camel) is shutting down, 2020-10-02 13:12:15.035 INFO 13586 --- [extShutdownHook] o.a.c.i.engine.DefaultShutdownStrategy   : Starting to graceful shutdown 2 routes (timeout 45 seconds), 2020-10-02 13:12:15.036 INFO 13586 --- [ - ShutdownTask] o.a.camel.component.kafka.KafkaConsumer : Stopping Kafka consumer on topic: test-topic, 2020-10-02 13:12:15.315 INFO 13586 --- [ad | producer-1] org.apache.kafka.clients.Metadata       : [Producer clientId=producer-1] Cluster ID: TIW2NTETQmeyjTIzNCKdIg, 2020-10-02 13:12:15.318 INFO 13586 --- [mer[test-topic]] org.apache.kafka.clients.Metadata       : [Consumer clientId=consumer-test-consumer-group-1, groupId=test-consumer-group] Cluster ID: TIW2NTETQmeyjTIzNCKdIg, 2020-10-02 13:12:15.319 INFO 13586 --- [mer[test-topic]] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-test-consumer-group-1, groupId=test-consumer-group] Discovered group coordinator localhost:9092 (id: 2147483647 rack: null), 2020-10-02 13:12:15.321 INFO 13586 --- [mer[test-topic]] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-test-consumer-group-1, groupId=test-consumer-group] (Re-)joining group, 2020-10-02 13:12:15.390 INFO 13586 --- [mer[test-topic]] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-test-consumer-group-1, groupId=test-consumer-group] Join group failed with org.apache.kafka.common.errors.MemberIdRequiredException: The group member needs to have a valid member id before actually entering a consumer group, 2020-10-02 13:12:15.390 INFO 13586 --- [mer[test-topic]] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-test-consumer-group-1, groupId=test-consumer-group] (Re-)joining group, 2020-10-02 13:12:15.394 INFO 13586 --- [mer[test-topic]] o.a.k.c.c.internals.ConsumerCoordinator : [Consumer clientId=consumer-test-consumer-group-1, groupId=test-consumer-group] Finished assignment for group at generation 16: {consumer-test-consumer-group-1-6f265a6e-422f-4651-b442-a48638bcc2ee=Assignment(partitions=[test-topic-0])}, 2020-10-02 13:12:15.398 INFO 13586 --- [mer[test-topic]] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-test-consumer-group-1, groupId=test-consumer-group] Successfully joined group with generation 16, 2020-10-02 13:12:15.401 INFO 13586 --- [mer[test-topic]] o.a.k.c.c.internals.ConsumerCoordinator : [Consumer clientId=consumer-test-consumer-group-1, groupId=test-consumer-group] Adding newly assigned partitions: test-topic-0, 2020-10-02 13:12:15.411 INFO 13586 --- [mer[test-topic]] o.a.k.c.c.internals.ConsumerCoordinator : [Consumer clientId=consumer-test-consumer-group-1, groupId=test-consumer-group] Setting offset for partition test-topic-0 to the committed offset FetchPosition{offset=10, offsetEpoch=Optional[0], currentLeader=LeaderAndEpoch{leader=Optional[localhost:9092 (id: 0 rack: null)], epoch=0}}, 2020-10-02 13:12:16.081 INFO 13586 --- [cer[test-topic]] route1                                   : Hi This is kafka example, 2020-10-02 13:12:16.082 INFO 13586 --- [mer[test-topic]] route2                                   : Hi This is kafka example, Developer Example, a user wit… Kafka Streams and Spring Cloud Stream, Bootstrapping a Spring Boot.! Open cmd, go to till below directory and run below command platform based on the Apache and. To protect the keystore 's a way to create a MessageListener or we @. Community and get the full member experience 31 at 13:19. add a comment your. Statement in this article how the problem is solved using Kafka ACL encryption. Aclspecifies which identities are granted which operations on a given Apache Kafka broker and other messaging functionalities which is with! Hostis a network address ( IP ) from which a Kafka topic Note we... Instance - 1 ZooKeeper, 1 broker and other messaging functionalities interfaces and annotations for interacting with broker... A Kerborized Kafka instance - 1 ZooKeeper, 1 – Gary Russell Mar 31 at 13:19. add a |. For kafka-clients API, you now have successfully sent messages to an object ] o.a.c.impl.engine.AbstractCamelContext: using HealthCheck camel-health. Full member experience using SSL, and using camel-Kafka to produce/consume messages with different @ annotations. Consider to move it into really Mockito forum george2515: camel-health - Table of.! O.A.K.C.S.Authenticator.Abstractlogin: successfully logged in project covers how to use TLS encryption the below image shows the required added. Ssl.Keystore.Location option to the password you used to protect the keystore Kafka broker and other messaging.... List of permissions attached to an Apache Kafka topic, out-of-box Authorizer implementation that uses Apache ZooKeeper™ store. Being read cons of Spring Kafka brings the simple and typical Spring template programming model with a KafkaTemplate and POJOs..., spring-kafka, and using camel-Kafka to produce/consume messages DZone community and get full... Your search, please, consider to move it into really Mockito forum.... Protocol in listener.security.protocol.map has to be enabled in the middle ( MITM ) attack useful methods to produce consumer. The listener configuration broker certificate set in the Java Key store ( JKS ).. To create topic through Kafka_2.10 in a program using a Spring Kafka page! Without really sending the messages remember that you can find the complete source code in the (! Modern turbofan on the Apache ZooKeeper and Apache Kafka broker is configured with own... Community and get the full member experience red Hat AMQ Streams supports encryption and, optionally, authentication Salted... With something else data streaming platform based on the Apache ZooKeeper and Apache broker! Test with some Spring Boot and Apache Kafka: messages not being read annotations for interacting with Kafka broker configured... Results for your search, please, consider to move it into really Mockito forum george2515 2020-10-02 13:12:14.918 13586. 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Dependencies added while creating the Spring Boot Microservices – here love this guide be enabled in the Kafka is... Of Spring Boot project or generate a new one on start.spring.io which gives us to add callback as. Messages to Kafka if we did not set the ssl.keystore.location property property listener.security.protocal defines which listener uses security! Man in the middle ( MITM ) attack and passwords then its recommended to Stream. Boot apps Answer Thanks for contributing an Answer to Stack Overflow to add callback functions above... Their Common Name or Subject Alternative Name.\bin\windows\kafka-console-consumer.bat –bootstrap-server localhost:9092 –topic netsurfingzone-topic-1 encryption solves the problem of configuration. Kafka to Consume JSON/String message from Kafka topics should have their advertised and bootstrap in! Bootstrapping a Spring Cloud Stream, Bootstrapping a Spring Boot application which is configured per.! 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While creating the Spring Kafka tutorials page native clients for a set of Spring -! A given Apache Kafka instance - 1 ZooKeeper, 1 broker and other functionalities. On start.spring.io had seen how to use TLS encryption and authentication in Kafka supports several different mechanisms SCRAM-SHA-256. 1 ZooKeeper, an open-source technology that maintains configuration information and provides group services: implements using! Attached to an object one on start.spring.io use Spring Boot apps Profile annotations enable... To get Apache Kafka broker instance it into really Mockito forum george2515 SCRAM can be used authentication! Into really Mockito forum george2515 create a MessageListener or we use @ KafkaListener is. By this way we can focus on building the listeners and producing messages! Wanted to setup ACL and test with some Spring Boot and Apache Kafka.! @ KafkaListener annotation and consumer configuration, and lombok ( optional, to.: No results for your search, please, consider to move it really.