RabbitMQ 第七课 springCloud Stream 整合
spring cloud stream整体架构核心概念图：
图一：消息的发送端和接收端可以是不同的中间件
图二：
图三：在消息的发送之前和消息的接收端套了一层管道
- @Output:输出注释，用于定义发送消息接口
- @Input:输入注解，用于定义消息的消费者接口
- @StreamListener:用于定义监听方法的注解
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springcloudstream框架有一个非常大的问题就是不能实现可靠性消息投递，会存在少量消息丢失的问题
这个原因是springcloudstream框架为了和kafka兼顾所以在实际工作中使用它的目的是针对高性能的消息通信的
这点就是当前版本的springcloudstream的定位
Barista接口是定义作为后面类的参数，这一接口来定义通道类型和通道名称（该名称可以自定义）
通道名称是作为配置用，通道类型则决定了app会使用这一通道进行发送消息还是从中接收消息
引入pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.dwz</groupId> <artifactId>rabbitmq-springcloudstream-producer</artifactId> <version>0.0.1-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <java.version>1.8</java.version> </properties> <dependencies> <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>2.1.6.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client --> <dependency> <groupId>com.rabbitmq</groupId> <artifactId>amqp-client</artifactId> <version>5.7.3</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-amqp</artifactId> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.10.0</version> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.10.0</version> </dependency> <!--spring boot热部署插件--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-stream-rabbit --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-stream-rabbit</artifactId> <version>2.1.4.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-actuator --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> <version>2.1.6.RELEASE</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
生产者代码
配置application.properties
server.port=8001 server.servlet.context-path=/producer spring.application.name=producer spring.cloud.stream.bindings.output_channel.destination=exchange-4 spring.cloud.stream.bindings.output_channel.group=queue-4 spring.cloud.stream.bindings.output_channel.binder=rabbit_cluster #表明使用的环境是rabbit spring.cloud.stream.binders.rabbit_cluster.type=rabbit spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.addresses=127.0.0.1:5672 spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.username=root_dwz spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.password=123456 spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.virtual-host=/vhost_dwz
Barista接口
package com.dwz.rabbitmq.stream; import org.springframework.cloud.stream.annotation.Output; import org.springframework.messaging.MessageChannel; public interface Barista { String OUTPUT_CHANNEL = "output_channel"; //注解@Output表明了它是一个输出类型的通道类，名字output_channel。这一名字与app1中通道名一致，表明注入了 //一个名字为output_channel的通道 @Output(Barista.OUTPUT_CHANNEL) MessageChannel logoutput(); }
发送消息的方法
package com.dwz.rabbitmq.stream; import java.util.Map; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.cloud.stream.annotation.EnableBinding; import org.springframework.messaging.Message; import org.springframework.messaging.MessageHeaders; import org.springframework.messaging.support.MessageBuilder; import org.springframework.stereotype.Service; @EnableBinding(Barista.class) @Service public class RabbitmqSender { @Autowired private Barista barista; //发送消息 public String sendMessage(Object message, Map<String, Object> properties) throws Exception { try { MessageHeaders mhs = new MessageHeaders(properties); Message msg = MessageBuilder.createMessage(message, mhs); boolean sendStatus = barista.logoutput().send(msg); System.err.println("-------------------sending---------------------"); System.err.println("发送数据：" + message + ",sendStatus:" + sendStatus); return null; } catch (Exception e) { System.err.println("---------------------error--------------------------"); e.printStackTrace(); throw new RuntimeException(e.getMessage()); } } }
测试代码
package com.dwz.rabbitmq; import java.util.Date; import java.util.HashMap; import java.util.Map; import org.apache.http.client.utils.DateUtils; 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.test.context.junit4.SpringRunner; import com.dwz.rabbitmq.stream.RabbitmqSender; @RunWith(SpringRunner.class) @SpringBootTest public class Testdd { @Autowired private RabbitmqSender rabbitmqSender; @Test public void sendMessageTest1() { for(int i = 0; i < 5; i++) { try { Map<String, Object> properties = new HashMap<>(); properties.put("SERIAL_NUMBER", "12345"); properties.put("BANK_NUMBER", "abc"); properties.put("PLAT_SEND_TIME", DateUtils.formatDate(new Date(), "yyyy-MM-dd HH:mm:ss:SSS")); rabbitmqSender.sendMessage("Hello, I am amqp sender num:" + i, properties); } catch (Exception e) { System.err.println("------------------error-------------------"); e.printStackTrace(); } } } }
消费端代码
配置application.properties
server.port=8002 server.servlet.context-path=/consumer spring.application.name=consumer spring.cloud.stream.bindings.input_channel.destination=exchange-4 spring.cloud.stream.bindings.input_channel.group=queue-4 spring.cloud.stream.bindings.input_channel.binder=rabbit_cluster spring.cloud.stream.bindings.input_channel.consumer.concurrency=1 spring.cloud.stream.rabbit.bindings.input_channel.consumer.requeue-rejected=false spring.cloud.stream.rabbit.bindings.input_channel.consumer.acknowledge-mode=manual #设置断开重连 spring.cloud.stream.rabbit.bindings.input_channel.consumer.recovery-interval=3000 #启用持久化订阅 spring.cloud.stream.rabbit.bindings.input_channel.consumer.durable-subscription=true #设置最大监听数 spring.cloud.stream.rabbit.bindings.input_channel.consumer.max-concurrency=5 spring.cloud.stream.binders.rabbit_cluster.type=rabbit spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.addresses=127.0.0.1:5672 spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.username=root_dwz spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.password=123456 spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.virtual-host=/vhost_dwz
Barista接口
package com.dwz.rabbitmq.stream; import org.springframework.cloud.stream.annotation.Input; import org.springframework.messaging.SubscribableChannel; public interface Barista { String INPUT_CHANNEL = "input_channel"; //注解@Input声明了它是一个输入类型的通道，名字是input_channel @Input(Barista.INPUT_CHANNEL) SubscribableChannel loginput(); }
接收消息的方法
package com.dwz.rabbitmq.stream; import org.springframework.amqp.support.AmqpHeaders; import org.springframework.cloud.stream.annotation.EnableBinding; import org.springframework.cloud.stream.annotation.StreamListener; import org.springframework.messaging.Message; import org.springframework.stereotype.Component; import com.rabbitmq.client.Channel; @EnableBinding(Barista.class) @Component public class RabbitmqReceiver { @StreamListener(Barista.INPUT_CHANNEL) public void receiver(Message message) throws Exception { Channel channel = (Channel)message.getHeaders().get(AmqpHeaders.CHANNEL); Long deliveryTag = (Long)message.getHeaders().get(AmqpHeaders.DELIVERY_TAG); System.err.println("Input Stream 1 接受数据：" + message); System.err.println("消费完毕---------------"); channel.basicAck(deliveryTag, false); } }
