springcloud stream消费者和生产者以及消费组配置

2021-02-04 17:36:00
admin
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摘要:springcloud stream消费者和生产者以及消费组配置

springcloud stream的配置

1、首先是pom文件的配置


<modelVersion>4.0.0</modelVersion>

	<groupId>com.didispace</groupId>
	<artifactId>stream-exception-handler-2</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.5.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>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version>1.18.2</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-stream-rabbit</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
	</dependencies>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.SR1</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>
2、application.yml配置


server:
  port: 8080
spring:
  application:
    name: stream-exception-handler-2
  cloud:
    stream:
      bindings:
        example-topic-input:
          consumer:
            max-attempts: 1 #重试次数,1是从1开始的
          destination: test-topic
          group: stream-exception-handler #消费组
        example-topic-output:
          destination: test-topic
  rabbitmq:
    host: localhost
    password: guest
    port: 5672
    username: guest

3、生产者和消费者代码


import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.cloud.stream.annotation.Input;
import org.springframework.cloud.stream.annotation.Output;
import org.springframework.cloud.stream.annotation.StreamListener;
import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.integration.support.MessageBuilder;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.SubscribableChannel;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;


@EnableBinding(TestApplication.TestTopic.class)
@SpringBootApplication
public class TestApplication {

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

    @RestController
    static class TestController {

        @Autowired
        private TestTopic testTopic;

        /**
         * 消息生产接口
         *
         * @param message
         * @return
         */
        @GetMapping("/sendMessage")
        public String messageWithMQ(@RequestParam String message) {
            testTopic.output().send(MessageBuilder.withPayload(message).build());
            return "ok";
        }

    }

    /**
     * 消息消费逻辑
     */
    @Slf4j
    @Component
    static class TestListener {

        @StreamListener(TestTopic.INPUT)
        public void receive(String payload) {
            log.info("Received payload : " + payload);
            //throw new RuntimeException("Message consumer failed!");
        }

        /**
         * 消息消费失败的降级处理逻辑)
         *
         * @param message
         */
        @ServiceActivator(inputChannel = "test-topic.stream-exception-handler.errors")
        public void error(Message<?> message) {
            log.info("Message consumer failed, call fallback!");
        }

    }

    interface TestTopic {

        String OUTPUT = "example-topic-output";
        String INPUT = "example-topic-input";

        @Output(OUTPUT)
        MessageChannel output();

        @Input(INPUT)
        SubscribableChannel input();

    }

}
备注:当有自定义业务处理逻辑的时候,重试次数有三次,自定义处理逻辑是最后执行的,只执行一次


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