diff --git a/spring-boot-samples/README.adoc b/spring-boot-samples/README.adoc index ab6b03a734..c2d27ec1ad 100644 --- a/spring-boot-samples/README.adoc +++ b/spring-boot-samples/README.adoc @@ -119,6 +119,9 @@ The following sample applications are provided: | link:spring-boot-sample-junit-jupiter[spring-boot-sample-junit-jupiter] | Demonstrates JUnit Jupiter-based testing +| link:spring-boot-sample-kafka[spring-boot-sample-kafka] +| consumer and producer using Apache Kafka + | link:spring-boot-sample-liquibase[spring-boot-sample-liquibase] | Database migrations with Liquibase diff --git a/spring-boot-samples/pom.xml b/spring-boot-samples/pom.xml index 51f5dbed35..e3a90ee1cc 100644 --- a/spring-boot-samples/pom.xml +++ b/spring-boot-samples/pom.xml @@ -57,6 +57,7 @@ spring-boot-sample-jta-narayana spring-boot-sample-jta-jndi spring-boot-sample-junit-jupiter + spring-boot-sample-kafka spring-boot-sample-liquibase spring-boot-sample-logback spring-boot-sample-oauth2-client diff --git a/spring-boot-samples/spring-boot-sample-kafka/pom.xml b/spring-boot-samples/spring-boot-sample-kafka/pom.xml new file mode 100644 index 0000000000..e0d3ca2717 --- /dev/null +++ b/spring-boot-samples/spring-boot-sample-kafka/pom.xml @@ -0,0 +1,50 @@ + + + 4.0.0 + + + spring-boot-samples + org.springframework.boot + ${revision} + + spring-boot-sample-kafka + Spring Boot Kafka Sample + Spring Boot Kafka Sample + + + ${basedir}/../.. + + + + + + org.springframework.boot + spring-boot-starter-json + + + org.springframework.kafka + spring-kafka + + + + org.springframework.boot + spring-boot-starter-test + test + + + org.springframework.kafka + spring-kafka-test + test + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + diff --git a/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/Consumer.java b/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/Consumer.java new file mode 100644 index 0000000000..a18227b40a --- /dev/null +++ b/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/Consumer.java @@ -0,0 +1,29 @@ +/* + * Copyright 2012-2018 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package sample.kafka; + +import org.springframework.kafka.annotation.KafkaListener; +import org.springframework.stereotype.Component; + +@Component +class Consumer { + + @KafkaListener(topics = "testTopic") + public void processMessage(SampleMessage message) { + System.out.println("Received sample message [" + message + "]"); + } + +} \ No newline at end of file diff --git a/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/Producer.java b/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/Producer.java new file mode 100644 index 0000000000..3297bb4780 --- /dev/null +++ b/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/Producer.java @@ -0,0 +1,35 @@ +/* + * Copyright 2012-2018 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package sample.kafka; + +import org.springframework.kafka.core.KafkaTemplate; +import org.springframework.stereotype.Component; + +@Component +public class Producer { + + private final KafkaTemplate kafkaTemplate; + + Producer(KafkaTemplate kafkaTemplate) { + this.kafkaTemplate = kafkaTemplate; + } + + public void send(SampleMessage message) { + this.kafkaTemplate.send("testTopic", message); + System.out.println("Sent sample message [" + message + "]"); + } + +} \ No newline at end of file diff --git a/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/SampleKafkaApplication.java b/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/SampleKafkaApplication.java new file mode 100644 index 0000000000..00e677b1f6 --- /dev/null +++ b/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/SampleKafkaApplication.java @@ -0,0 +1,36 @@ +/* + * Copyright 2012-2018 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package sample.kafka; + +import org.springframework.boot.ApplicationRunner; +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.builder.SpringApplicationBuilder; +import org.springframework.context.annotation.Bean; + +@SpringBootApplication +public class SampleKafkaApplication { + + public static void main(String[] args) { + SpringApplication.run(SampleKafkaApplication.class, args); + } + + @Bean + public ApplicationRunner runner(Producer producer) { + return args -> producer.send(new SampleMessage(1, "A simple test message")); + } + +} diff --git a/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/SampleMessage.java b/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/SampleMessage.java new file mode 100644 index 0000000000..d11cd9a4f9 --- /dev/null +++ b/spring-boot-samples/spring-boot-sample-kafka/src/main/java/sample/kafka/SampleMessage.java @@ -0,0 +1,51 @@ +/* + * Copyright 2012-2018 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package sample.kafka; + +import com.fasterxml.jackson.annotation.JsonCreator; +import com.fasterxml.jackson.annotation.JsonProperty; + +public class SampleMessage { + + private final Integer id; + + private final String message; + + @JsonCreator + public SampleMessage(@JsonProperty("id") Integer id, + @JsonProperty("message") String message) { + this.id = id; + this.message = message; + } + + public Integer getId() { + return this.id; + } + + public String getMessage() { + return this.message; + } + + @Override + public String toString() { + final StringBuilder sb = new StringBuilder("SampleMessage{"); + sb.append("id=").append(this.id); + sb.append(", message='").append(this.message).append('\''); + sb.append('}'); + return sb.toString(); + } + +} diff --git a/spring-boot-samples/spring-boot-sample-kafka/src/main/resources/application.properties b/spring-boot-samples/spring-boot-sample-kafka/src/main/resources/application.properties new file mode 100644 index 0000000000..97dbed42b9 --- /dev/null +++ b/spring-boot-samples/spring-boot-sample-kafka/src/main/resources/application.properties @@ -0,0 +1,6 @@ +spring.kafka.bootstrap-servers=localhost:9092 +spring.kafka.consumer.group-id=testGroup +spring.kafka.consumer.auto-offset-reset=earliest +spring.kafka.consumer.value-deserializer=org.springframework.kafka.support.serializer.JsonDeserializer +spring.kafka.producer.value-serializer=org.springframework.kafka.support.serializer.JsonSerializer +spring.kafka.consumer.properties.spring.json.trusted.packages=sample.kafka \ No newline at end of file diff --git a/spring-boot-samples/spring-boot-sample-kafka/src/test/java/sample/kafka/SampleKafkaApplicationTests.java b/spring-boot-samples/spring-boot-sample-kafka/src/test/java/sample/kafka/SampleKafkaApplicationTests.java new file mode 100644 index 0000000000..c6364d6d7d --- /dev/null +++ b/spring-boot-samples/spring-boot-sample-kafka/src/test/java/sample/kafka/SampleKafkaApplicationTests.java @@ -0,0 +1,77 @@ +/* + * Copyright 2012-2018 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package sample.kafka; + +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.TimeUnit; + +import org.junit.Rule; +import org.junit.Test; +import org.junit.runner.RunWith; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.test.context.SpringBootTest; +import org.springframework.boot.test.context.TestConfiguration; +import org.springframework.boot.test.rule.OutputCapture; +import org.springframework.context.annotation.Bean; +import org.springframework.kafka.test.context.EmbeddedKafka; +import org.springframework.test.context.TestPropertySource; +import org.springframework.test.context.junit4.SpringRunner; + +import static org.assertj.core.api.Assertions.assertThat; + +/** + * Integration tests for demo application. + * + * @author hcxin + * @author Gary Russell + * @author Stephane Nicoll + */ +@RunWith(SpringRunner.class) +@SpringBootTest +@TestPropertySource(properties = "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}") +@EmbeddedKafka +public class SampleKafkaApplicationTests { + + private static final CountDownLatch latch = new CountDownLatch(1); + + @Rule + public OutputCapture outputCapture = new OutputCapture(); + + @Test + public void testVanillaExchange() throws Exception { + assertThat(latch.await(10, TimeUnit.SECONDS)).isTrue(); + assertThat(this.outputCapture.toString().contains("A simple test message")) + .isTrue(); + } + + @TestConfiguration + public static class Config { + + @Bean + public Consumer consumer() { + return new Consumer() { + @Override + public void processMessage(SampleMessage message) { + super.processMessage(message); + latch.countDown(); + } + }; + } + + } + +}