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Merge pull request #11597 from hcxin:master
* pr/11597: Polish "Add Kafka sample" Add Kafka sample
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@ -119,6 +119,9 @@ The following sample applications are provided:
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| link:spring-boot-sample-junit-jupiter[spring-boot-sample-junit-jupiter]
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| Demonstrates JUnit Jupiter-based testing
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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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| link:spring-boot-sample-liquibase[spring-boot-sample-liquibase]
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| Database migrations with Liquibase
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@ -57,6 +57,7 @@
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<module>spring-boot-sample-jta-narayana</module>
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<module>spring-boot-sample-jta-jndi</module>
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<module>spring-boot-sample-junit-jupiter</module>
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<module>spring-boot-sample-kafka</module>
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<module>spring-boot-sample-liquibase</module>
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<module>spring-boot-sample-logback</module>
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<module>spring-boot-sample-oauth2-client</module>
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50
spring-boot-samples/spring-boot-sample-kafka/pom.xml
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50
spring-boot-samples/spring-boot-sample-kafka/pom.xml
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@ -0,0 +1,50 @@
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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-json</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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<!-- 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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<scope>test</scope>
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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 +1,29 @@
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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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class Consumer {
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@KafkaListener(topics = "testTopic")
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public void processMessage(SampleMessage message) {
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System.out.println("Received sample message [" + message + "]");
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}
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}
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@ -0,0 +1,35 @@
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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.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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private final KafkaTemplate<Object, SampleMessage> kafkaTemplate;
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Producer(KafkaTemplate<Object, SampleMessage> kafkaTemplate) {
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this.kafkaTemplate = kafkaTemplate;
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}
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public void send(SampleMessage message) {
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this.kafkaTemplate.send("testTopic", message);
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System.out.println("Sent sample message [" + message + "]");
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}
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}
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@ -0,0 +1,36 @@
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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.ApplicationRunner;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.boot.builder.SpringApplicationBuilder;
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import org.springframework.context.annotation.Bean;
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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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@Bean
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public ApplicationRunner runner(Producer producer) {
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return args -> producer.send(new SampleMessage(1, "A simple test message"));
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}
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}
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@ -0,0 +1,51 @@
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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 com.fasterxml.jackson.annotation.JsonCreator;
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import com.fasterxml.jackson.annotation.JsonProperty;
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public class SampleMessage {
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private final Integer id;
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private final String message;
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@JsonCreator
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public SampleMessage(@JsonProperty("id") Integer id,
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@JsonProperty("message") String message) {
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this.id = id;
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this.message = message;
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}
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public Integer getId() {
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return this.id;
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}
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public String getMessage() {
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return this.message;
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}
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@Override
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public String toString() {
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final StringBuilder sb = new StringBuilder("SampleMessage{");
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sb.append("id=").append(this.id);
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sb.append(", message='").append(this.message).append('\'');
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sb.append('}');
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return sb.toString();
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}
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}
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@ -0,0 +1,6 @@
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spring.kafka.bootstrap-servers=localhost:9092
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spring.kafka.consumer.group-id=testGroup
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spring.kafka.consumer.auto-offset-reset=earliest
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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 +1,77 @@
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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 java.util.concurrent.CountDownLatch;
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import java.util.concurrent.TimeUnit;
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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.context.TestConfiguration;
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import org.springframework.boot.test.rule.OutputCapture;
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import org.springframework.context.annotation.Bean;
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import org.springframework.kafka.test.context.EmbeddedKafka;
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import org.springframework.test.context.TestPropertySource;
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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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* @author Gary Russell
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* @author Stephane Nicoll
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*/
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@RunWith(SpringRunner.class)
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@SpringBootTest
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@TestPropertySource(properties = "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}")
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@EmbeddedKafka
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public class SampleKafkaApplicationTests {
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private static final CountDownLatch latch = new CountDownLatch(1);
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@Rule
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public OutputCapture outputCapture = new OutputCapture();
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@Test
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public void testVanillaExchange() throws Exception {
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assertThat(latch.await(10, TimeUnit.SECONDS)).isTrue();
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assertThat(this.outputCapture.toString().contains("A simple test message"))
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.isTrue();
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}
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@TestConfiguration
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public static class Config {
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@Bean
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public Consumer consumer() {
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return new Consumer() {
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@Override
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public void processMessage(SampleMessage message) {
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super.processMessage(message);
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latch.countDown();
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}
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};
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}
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}
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}
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