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Add Kafka sample
See gh-11597
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@ -230,3 +230,6 @@ The following sample applications are provided:
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| link:spring-boot-sample-xml[spring-boot-sample-xml]
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| Example show how Spring Boot can be mixed with traditional XML configuration (we
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generally recommend using Java `@Configuration` whenever possible
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| link:spring-boot-sample-kafka[spring-boot-sample-kafka]
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| consumer and producer using Apache Kafka
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@ -97,6 +97,7 @@
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<module>spring-boot-sample-websocket-undertow</module>
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<module>spring-boot-sample-webservices</module>
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<module>spring-boot-sample-xml</module>
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<module>spring-boot-sample-kafka</module>
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</modules>
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<!-- No dependencies - otherwise the samples won't work if you change the
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parent -->
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53
spring-boot-samples/spring-boot-sample-kafka/pom.xml
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53
spring-boot-samples/spring-boot-sample-kafka/pom.xml
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@ -0,0 +1,53 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<!-- Your own application should inherit from spring-boot-starter-parent -->
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<artifactId>spring-boot-samples</artifactId>
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<groupId>org.springframework.boot</groupId>
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<version>${revision}</version>
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</parent>
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<artifactId>spring-boot-sample-kafka</artifactId>
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<name>Spring Boot Kafka Sample</name>
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<description>Spring Boot Kafka Sample</description>
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<properties>
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<main.basedir>${basedir}/../..</main.basedir>
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</properties>
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<dependencies>
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<!-- Compile -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.kafka</groupId>
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<artifactId>spring-kafka</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-json</artifactId>
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</dependency>
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<!-- Test -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.kafka</groupId>
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<artifactId>spring-kafka-test</artifactId>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>
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@ -0,0 +1,28 @@
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/*
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* Copyright 2012-2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.kafka;
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import org.springframework.kafka.annotation.KafkaListener;
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import org.springframework.stereotype.Component;
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@Component
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public class Consumer {
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@KafkaListener(topics = "myTopic")
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public void processMessage(SampleMessage message) {
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System.out.println("consumer has received message : [" + message + "]");
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}
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}
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@ -0,0 +1,32 @@
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/*
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* Copyright 2012-2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.kafka;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.kafka.core.KafkaTemplate;
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import org.springframework.stereotype.Component;
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@Component
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public class Producer {
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@Autowired
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private KafkaTemplate kafkaTemplate;
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public void send(SampleMessage message) {
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kafkaTemplate.send("myTopic", message);
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System.out.println("producer has sent message.");
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}
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}
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@ -0,0 +1,27 @@
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/*
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* Copyright 2012-2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.kafka;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class SampleKafkaApplication {
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public static void main(String[] args) {
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SpringApplication.run(SampleKafkaApplication.class, args);
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}
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}
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@ -0,0 +1,53 @@
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/*
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* Copyright 2012-2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.kafka;
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public class SampleMessage {
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private Integer id;
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private String message;
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public Integer getId() {
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return id;
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}
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public void setId(Integer id) {
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this.id = id;
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}
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public String getMessage() {
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return message;
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}
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public void setMessage(String message) {
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this.message = message;
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}
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public SampleMessage() {
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}
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public SampleMessage(Integer id, String message) {
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this.id = id;
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this.message = message;
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}
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@Override
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public String toString() {
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return "SampleMessage{" +
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"id=" + id +
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", message='" + message + '\'' +
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'}';
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}
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}
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@ -0,0 +1,5 @@
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spring.kafka.bootstrap-servers=localhost:9092
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spring.kafka.consumer.group-id=myGroup
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spring.kafka.consumer.value-deserializer=org.springframework.kafka.support.serializer.JsonDeserializer
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spring.kafka.Producer.value-serializer=org.springframework.kafka.support.serializer.JsonSerializer
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spring.kafka.consumer.properties.spring.json.trusted.packages=sample.kafka
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@ -0,0 +1,61 @@
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/*
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* Copyright 2012-2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.kafka;
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import org.junit.Rule;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.boot.test.rule.OutputCapture;
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import org.springframework.kafka.test.rule.KafkaEmbedded;
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import org.springframework.test.context.junit4.SpringRunner;
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import static org.assertj.core.api.Assertions.assertThat;
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/**
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* Integration tests for demo application.
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*
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* @author hcxin
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*/
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@RunWith(SpringRunner.class)
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@SpringBootTest
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public class SampleKafkaApplicationTests {
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@Rule
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public OutputCapture outputCapture = new OutputCapture();
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@Autowired
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private Producer producer;
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@Test
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public void sendSimpleMessage() throws Exception {
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initKafkaEmbedded();
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SampleMessage message = new SampleMessage(1, "Test message");
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producer.send(message);
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Thread.sleep(1000L);
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assertThat(this.outputCapture.toString().contains("Test message")).isTrue();
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}
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public void initKafkaEmbedded() throws Exception {
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KafkaEmbedded embeddedKafka = new KafkaEmbedded(1, true);
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embeddedKafka.setKafkaPorts(9092);
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embeddedKafka.afterPropertiesSet();
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//Need 10s, waiting for the Kafka server start.
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Thread.sleep(10000L);
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}
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}
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