spring cloud stream kafka

pom.xml

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.4.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
		<spring-cloud.version>Dalston.SR1</spring-cloud.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-stream-binder-kafka</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>${spring-cloud.version}</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

yml文件

spring:
  cloud:
    stream:
      defaultBinder: kafka
      bindings:
        issueInPutMessage:
          destination: devops-cca
          content-type: application/json
          group: default
        issueOutPutMessage:
          destination: devops-cca
          content-type: application/json
          producer:
            partitionKeyExpression: payload.id
            partitionCount: 2
      kafka:
        binder:
          brokers: 10.40.64.53
          zkNodes: 10.40.64.53
          autoAddPartitions: true
server:
  port: 9050

SenderApplication.java

@SpringBootApplication
public class SenderApplication {
	public static void main(String[] args) {
		SpringApplication.run(SenderApplication.class, args);
	}
}

  MainController.java

@RestController
@EnableBinding({IssueInputMessage.class, IssueOutputMessage.class})
public class MainController {

    @Autowired
    IssueOutputMessage issueOutputMessage;

    @Value("${spring.cloud.stream.bindings.issueOutPutMessage.producer.partitionCount}")
    private String partitionCount;

    private void sendMore() {
        for (int _index = 0; _index < 10; _index++) {
            int index = Integer.parseInt(String.valueOf(Math.round(Math.random() * Math.pow(10, partitionCount.length())) / Integer.parseInt(partitionCount)));
            IssueMessage chatMessage = new IssueMessage();
            chatMessage.setMessage(String.format("message %s", _index));
            chatMessage.setId(index);
            issueOutputMessage.issueOutPutMessage().send(MessageBuilder.withPayload(chatMessage).build());
        }
    }

    private void sendOnlyOne() {
        int index = Integer.parseInt(String.valueOf(Math.round(Math.random() * Math.pow(10, partitionCount.length())) / Integer.parseInt(partitionCount)));
        IssueMessage chatMessage = new IssueMessage();
        chatMessage.setMessage(String.format("message %s", Math.round(Math.random() * 10)));
        chatMessage.setId(index);
        issueOutputMessage.issueOutPutMessage().send(MessageBuilder.withPayload(chatMessage).build());
    }

    @RequestMapping("/")
    public String index() {
        sendOnlyOne();
        return "ok";
    }


    @StreamListener(IssueInputMessage.ISSUE_INPUT_MESSAGE)
    public void analyzingCancel(Message<IssueMessage> message) {
        IssueMessage chatMessage = message.getPayload();
        System.out.println(chatMessage.getMessage());
    }

}

 

public interface IssueInputMessage {

    String ISSUE_INPUT_MESSAGE = "issueInPutMessage";

    @Input
    SubscribableChannel issueInPutMessage();

}

 

public class IssueMessage<T> {

    private int id;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    private T message;

    public T getMessage() {
        return message;
    }

    public void setMessage(T message) {
        this.message = message;
    }
}

 

public interface IssueOutputMessage {

    @Output
    MessageChannel issueOutPutMessage();

}