RabbitMQ精讲7：与SpringBoot、Spring Cloud Stream整合实战

梦里梦外; 2023-05-22 06:50 80阅读 0赞

**目录**

与SpringBoot整合实战

1. 生产端

2. 消费端

消费端核心配置：

@RabbitListener注解使用

3. 代码示例

3.1 pom文件 和消息实体

3.2 生产者

3.3 消费者

与Spring Cloud Stream整合实战

1. 架构介绍

2. 核心概念：

3. 代码示例

3.1 pom文件 和 消息实体

3.2 生产者

3.3 消费者

--------------------

# 与SpringBoot整合实战 #

## 1. 生产端 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70][] SpringBoot整合配置详解-生产端

>  *  publisher-confirms,实现一个监听器用于监听Broker端给我们返回的确认请求：RabbitTemplate.ConfirmCallback
>  *  publisher-returns,保证消息对Broker端是可达的，如果出现路由键不可达的情况，则使用监听器对不可达的消息进行后续的处理，保证消息的路由成功：RabbitTemplate.ReturnCallback
>  *  **注意一点，在发送消息的时候对template进行配置mandatory=true保证监听有效**
>  *  生产端还可以配置其他属性，比如发送重试，超时时间，次数，间隔等  
>

## 2. 消费端 ##

### **消费端核心配置：** ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 1][] SpringBoot整合配置详解-消费端

> \#\#签收模式-手工签收  
> spring.rabbitmq.listener.simple.acknowledge-mode=manual  
> \#\#设置监听限制：最大10，默认5  
> spring.rabbitmq.listener.simple.concurrency=5  
> spring.rabbitmq.listener.simple.max-concurrency=10

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 2][] SpringBoot整合配置详解-消费端

>  *  首先配置手工确认模式，用于ACK的手工处理，这样我们可以保证消息的可靠性送达，或者再消费端消费失败的时候可以做到重回队列（不建议）、根据业务记录日志等处理。
>  *  可以设置消费端的监听个数和最大个数，用于监控消费端的并发情况

### @RabbitListener注解使用 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 3][] @RabbitListener注解使用

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 4][] @RabbitListener注解使用

>  *   消费端监听@RabbitListener注解,这个对于在实际工作中非常的好用
>  *  @RabbitListener是一个组合注解，里面可以注解配置
>  *  @QueueBinding、@Queue、@Exchange直接通过这个组合注解一次性搞定消费端交换机、队列、绑定、路由、并且配置监听功能等。

## 3. 代码示例 ##

### 3.1 pom文件 和消息实体 ###

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

import java.io.Serializable;
    
    public class Order implements Serializable {
    
    	private String id;
    	private String name;
    	
    	public Order() {
    	}
    	public Order(String id, String name) {
    		super();
    		this.id = id;
    		this.name = name;
    	}
    	public String getId() {
    		return id;
    	}
    	public void setId(String id) {
    		this.id = id;
    	}
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	
    	
    }

### 3.2 生产者 ###

**application.properties**

*   **RabbitSender**

import java.util.Map;
 
 import org.springframework.amqp.rabbit.core.RabbitTemplate;
 import org.springframework.amqp.rabbit.core.RabbitTemplate.ConfirmCallback;
 import org.springframework.amqp.rabbit.core.RabbitTemplate.ReturnCallback;
 import org.springframework.amqp.rabbit.support.CorrelationData;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.messaging.Message;
 import org.springframework.messaging.MessageHeaders;
 import org.springframework.messaging.support.MessageBuilder;
 import org.springframework.stereotype.Component;
 
 import com.bfxy.springboot.entity.Order;
 
 @Component
 public class RabbitSender {
 
 	//自动注入RabbitTemplate模板类
 	@Autowired
 	private RabbitTemplate rabbitTemplate; 
 	
 	//回调函数: confirm确认
 	final ConfirmCallback confirmCallback = new RabbitTemplate.ConfirmCallback() {
 		@Override
 		public void confirm(CorrelationData correlationData, boolean ack, String cause) {
 			System.err.println("correlationData: " + correlationData);
 			System.err.println("ack: " + ack);
 			if(!ack){
 				System.err.println("异常处理....");
 			}
 		}
 	};
 	
 	//回调函数: return返回
 	final ReturnCallback returnCallback = new RabbitTemplate.ReturnCallback() {
 		@Override
 		public void returnedMessage(org.springframework.amqp.core.Message message, int replyCode, String replyText,
 				String exchange, String routingKey) {
 			System.err.println("return exchange: " + exchange + ", routingKey: " 
 				+ routingKey + ", replyCode: " + replyCode + ", replyText: " + replyText);
 		}
 	};
 	
 	//发送消息方法调用: 构建Message消息
 	public void send(Object message, Map<String, Object> properties) throws Exception {
 		MessageHeaders mhs = new MessageHeaders(properties);
 		Message msg = MessageBuilder.createMessage(message, mhs);
 		rabbitTemplate.setConfirmCallback(confirmCallback);
 		rabbitTemplate.setReturnCallback(returnCallback);
 		//id + 时间戳 全局唯一 
 		CorrelationData correlationData = new CorrelationData("1234567890");
 		rabbitTemplate.convertAndSend("exchange-1", "springboot.abc", msg, correlationData);
 	}
 	
 	//发送消息方法调用: 构建自定义对象消息
 	public void sendOrder(Order order) throws Exception {
 		rabbitTemplate.setConfirmCallback(confirmCallback);
 		rabbitTemplate.setReturnCallback(returnCallback);
 		//id + 时间戳 全局唯一 
 		CorrelationData correlationData = new CorrelationData("0987654321");
 		rabbitTemplate.convertAndSend("exchange-2", "springboot.def", order, correlationData);
 	}
 	
 }

*  测试类

import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.Map;
 
 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.bfxy.springboot.entity.Order;
 import com.bfxy.springboot.producer.RabbitSender;
 
 @RunWith(SpringRunner.class)
 @SpringBootTest
 public class ApplicationTests {
 
 	@Test
 	public void contextLoads() {
 	}
 	
 	@Autowired
 	private RabbitSender rabbitSender;
 
 	private static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
 	
 	@Test
 	public void testSender1() throws Exception {
 		 Map<String, Object> properties = new HashMap<>();
 		 properties.put("number", "12345");
 		 properties.put("send_time", simpleDateFormat.format(new Date()));
 		 rabbitSender.send("Hello RabbitMQ For Spring Boot!", properties);
 	}
 	
 	@Test
 	public void testSender2() throws Exception {
 		 Order order = new Order("001", "第一个订单");
 		 rabbitSender.sendOrder(order);
 	}
 	
 	
 	
 }

### 3.3 消费者 ###

**application.properties**

spring.rabbitmq.addresses=192.168.11.76:5672
    spring.rabbitmq.username=guest
    spring.rabbitmq.password=guest
    spring.rabbitmq.virtual-host=/
    spring.rabbitmq.connection-timeout=15000
    
    spring.rabbitmq.listener.simple.acknowledge-mode=manual
    spring.rabbitmq.listener.simple.concurrency=5
    spring.rabbitmq.listener.simple.max-concurrency=10
    
    spring.rabbitmq.listener.order.queue.name=queue-2
    spring.rabbitmq.listener.order.queue.durable=true
    spring.rabbitmq.listener.order.exchange.name=exchange-2
    spring.rabbitmq.listener.order.exchange.durable=true
    spring.rabbitmq.listener.order.exchange.type=topic
    spring.rabbitmq.listener.order.exchange.ignoreDeclarationExceptions=true
    spring.rabbitmq.listener.order.key=springboot.*

*   **RabbitReceiver **

package com.bfxy.springboot.conusmer;
 
 import java.util.Map;
 
 import org.springframework.amqp.rabbit.annotation.Exchange;
 import org.springframework.amqp.rabbit.annotation.Queue;
 import org.springframework.amqp.rabbit.annotation.QueueBinding;
 import org.springframework.amqp.rabbit.annotation.RabbitHandler;
 import org.springframework.amqp.rabbit.annotation.RabbitListener;
 import org.springframework.amqp.support.AmqpHeaders;
 import org.springframework.messaging.Message;
 import org.springframework.messaging.handler.annotation.Headers;
 import org.springframework.messaging.handler.annotation.Payload;
 import org.springframework.stereotype.Component;
 
 import com.rabbitmq.client.Channel;
 
 @Component
 public class RabbitReceiver {
 
 	
 	@RabbitListener(bindings = @QueueBinding(
 			value = @Queue(value = "queue-1", 
 			durable="true"),
 			exchange = @Exchange(value = "exchange-1", 
 			durable="true", 
 			type= "topic", 
 			ignoreDeclarationExceptions = "true"),
 			key = "springboot.*"
 			)
 	)
 	@RabbitHandler
 	public void onMessage(Message message, Channel channel) throws Exception {
 		System.err.println("--------------------------------------");
 		System.err.println("消费端Payload: " + message.getPayload());
 		Long deliveryTag = (Long)message.getHeaders().get(AmqpHeaders.DELIVERY_TAG);
 		//手工ACK
 		channel.basicAck(deliveryTag, false);
 	}
 	
 	
 	/**
 	 * 
 	 * 	spring.rabbitmq.listener.order.queue.name=queue-2
 		spring.rabbitmq.listener.order.queue.durable=true
 		spring.rabbitmq.listener.order.exchange.name=exchange-1
 		spring.rabbitmq.listener.order.exchange.durable=true
 		spring.rabbitmq.listener.order.exchange.type=topic
 		spring.rabbitmq.listener.order.exchange.ignoreDeclarationExceptions=true
 		spring.rabbitmq.listener.order.key=springboot.*
 	 * @param order
 	 * @param channel
 	 * @param headers
 	 * @throws Exception
 	 */
 	@RabbitListener(bindings = @QueueBinding(
 			value = @Queue(value = "${spring.rabbitmq.listener.order.queue.name}", 
 			durable="${spring.rabbitmq.listener.order.queue.durable}"),
 			exchange = @Exchange(value = "${spring.rabbitmq.listener.order.exchange.name}", 
 			durable="${spring.rabbitmq.listener.order.exchange.durable}", 
 			type= "${spring.rabbitmq.listener.order.exchange.type}", 
 			ignoreDeclarationExceptions = "${spring.rabbitmq.listener.order.exchange.ignoreDeclarationExceptions}"),
 			key = "${spring.rabbitmq.listener.order.key}"
 			)
 	)
 	@RabbitHandler
 	public void onOrderMessage(@Payload com.bfxy.springboot.entity.Order order, 
 			Channel channel, 
 			@Headers Map<String, Object> headers) throws Exception {
 		System.err.println("--------------------------------------");
 		System.err.println("消费端order: " + order.getId());
 		Long deliveryTag = (Long)headers.get(AmqpHeaders.DELIVERY_TAG);
 		//手工ACK
 		channel.basicAck(deliveryTag, false);
 	}
 	
 	
 }

# 与Spring Cloud Stream整合实战 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 5][] 与Spring Cloud Stream整合

> Spring Cloud，这个全家桶框架在整个中小型互联网公司异常的火爆，那么相对应的Spring Cloud Stream 就渐渐的被大家所重视起来，这一节课主要来介绍Spring Cloud Stream如何与RabbitMQ进行集成。

## 1. 架构介绍 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 6][]

>  
> 
>  *  Destination Binder:包含自己的应用Application
>  *  左边是RabbitMQ、右边是Kafka。表示消息的生产与发送，可以是不同的消息中间件。这是Spring Cloud Stream 最上层的一个抽象。非常好的地方。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 7][]

>  *  两个比较重要的地方：inputs(输入)消息接收端、outputs(输出)消息发送端
>  *  一个 Spring Cloud Stream 应用以消息中间件为核心，应用通过Spring Cloud Stream注入的输入/输出通道 channels 与外部进行通信。channels 通过特定的Binder实现与外部消息中间件进行通信。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 8][]

>  *  黄色：表示RabbitMQ
>  *  绿色：插件，消息的输入输出都套了一层插件，插件可以用于各种各样不同的消息，也可以用于消息中间件的替换。

## 2. 核心概念： ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 9][]

>  *  Barista \[bəˈri:stə\] 接口：Barista接口是定义来作为后面类的参数，**这一接口定义来通道类型和通道名称**，
>     
>      *  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。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 10][]

> 通道接口如何定义：
> 
>  *  @Output：输出注解，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

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 11][]

> 使用Spring Cloud Stream 非常简单，只需要使用好这3个注解即可，在实现高性能消息的生产和消费的场景非常合适，但是使用**SpringCloudStream框架有一个非常大的问题,就是不能实现可靠性的投递，也就是没法保证消息的100%可靠性，会存在少量消息丢失的问题。**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZseTkxMDkwNQ_size_16_color_FFFFFF_t_70 12][]

>  *  目前SpringCloudStream整合了RabbitMQ与Kafka，我们都知道Kafka是无法进行消息可靠性投递的，**这个原因是因为SpringCloudStream框架为了和Kafka兼顾所以在实际工作中使用它的目的就是针对高性能的消息通信的！**这点就是在当前版本SpringCloudStream的定位。
>  *  因此在实际的工作中，可以采用SpringCloudStream，如果需要保证可靠性投递，也可以单独采用RabbitMQ，也是可以的。

## 3. 代码示例 ##

### 3.1 pom文件 和 消息实体 ###

<dependencies>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>	
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter</artifactId>
 		</dependency>
 		<dependency>
 		 <groupId>org.springframework.boot</groupId>
 		 <artifactId>spring-boot-autoconfigure</artifactId>
 		</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>
 		 <version>1.3.4.RELEASE</version>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-actuator</artifactId>
 		</dependency>
 	</dependencies>

###  3.2 生产者 ###

*    **application.properties**

server.port=8001
    server.servlet.context-path=/producer
    
    spring.application.name=producer
    spring.cloud.stream.bindings.output_channel.destination=exchange-3
    spring.cloud.stream.bindings.output_channel.group=queue-3
    spring.cloud.stream.bindings.output_channel.binder=rabbit_cluster
    
    spring.cloud.stream.binders.rabbit_cluster.type=rabbit
    spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.addresses=192.168.11.76:5672
    spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.username=guest
    spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.password=guest
    spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.virtual-host=/

*  **Barista接口**

package com.bfxy.rabbitmq.stream;
 
 import org.springframework.cloud.stream.annotation.Output;
 import org.springframework.messaging.MessageChannel;
 
 /**
 * 中文类名： 
 * 概要说明： 
 * 这里的Barista接口是定义来作为后面类的参数，这一接口定义来通道类型和通道名称。
 * 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。
 */
 public interface Barista {
 	 
 //String INPUT_CHANNEL = "input_channel"; 
 String OUTPUT_CHANNEL = "output_channel"; 
 
 //注解@Input声明了它是一个输入类型的通道，名字是Barista.INPUT_CHANNEL，也就是position3的input_channel。这一名字与上述配置app2的配置文件中position1应该一致，表明注入了一个名字叫做input_channel的通道，它的类型是input，订阅的主题是position2处声明的mydest这个主题 
 // @Input(Barista.INPUT_CHANNEL) 
 // SubscribableChannel loginput(); 
 //注解@Output声明了它是一个输出类型的通道，名字是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，类型是output，发布的主题名为mydest。 
 @Output(Barista.OUTPUT_CHANNEL)
 MessageChannel logoutput(); 
 
 //	String INPUT_BASE = "queue-1"; 
 //	String OUTPUT_BASE = "queue-1"; 
 //	@Input(Barista.INPUT_BASE) 
 //	SubscribableChannel input1(); 
 //	MessageChannel output1(); 
 
 }

*  ** RabbitmqSender **

package com.bfxy.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.out.println("发送数据：" + message + ",sendStatus: " + sendStatus);
 }catch (Exception e){ 
 	System.err.println("-------------error-------------");
 	e.printStackTrace();
 throw new RuntimeException(e.getMessage());
 
 } 
 return null;
 } 
 
 }

*  测试类

package com.bfxy.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.bfxy.rabbitmq.stream.RabbitmqSender;
 
 @RunWith(SpringRunner.class)
 @SpringBootTest
 public class ApplicationTests {
 
 	@Autowired
 	private RabbitmqSender rabbitmqSender;
 	
 	
 	@Test
 	public void sendMessageTest1() {
 for(int i = 0; i < 1; i ++){
 	 try {
 		 Map<String, Object> properties = new HashMap<String, Object>();
 		 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.out.println("--------error-------");
 e.printStackTrace(); 
 }
 }
 //TimeUnit.SECONDS.sleep(Integer.MAX_VALUE);
 	}
 	
 }

### 3.3 消费者 ###

*  **application.properties**

server.port=8002
    server.context-path=/consumer
    
    spring.application.name=consumer
    spring.cloud.stream.bindings.input_channel.destination=exchange-3
    spring.cloud.stream.bindings.input_channel.group=queue-3
    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
    spring.cloud.stream.rabbit.bindings.input_channel.consumer.recovery-interval=3000
    spring.cloud.stream.rabbit.bindings.input_channel.consumer.durable-subscription=true
    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=192.168.11.76:5672
    spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.username=guest
    spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.password=guest
    spring.cloud.stream.binders.rabbit_cluster.environment.spring.rabbitmq.virtual-host=/

*      Barista接口

package com.bfxy.rabbitmq.stream;
 
 import org.springframework.cloud.stream.annotation.Input;
 import org.springframework.messaging.SubscribableChannel;
 
 /**
 * 中文类名： 
 * 概要说明： 
 * 这里的Barista接口是定义来作为后面类的参数，这一接口定义来通道类型和通道名称。
 * 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。
 * @author ashen（Alienware）
 * @since 2016年7月22日
 */
 
 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Barista.INPUT_CHANNEL，也就是position3的input_channel。这一名字与上述配置app2的配置文件中position1应该一致，表明注入了一个名字叫做input_channel的通道，它的类型是input，订阅的主题是position2处声明的mydest这个主题 
 @Input(Barista.INPUT_CHANNEL) 
 SubscribableChannel loginput(); 
 
 
 }

*      RabbitmqReceiver
 *      package com.bfxy.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.Service;
        
        import com.rabbitmq.client.Channel;
        
        
        @EnableBinding(Barista.class)
        @Service
        public class RabbitmqReceiver {  
        
            @StreamListener(Barista.INPUT_CHANNEL)  
            public void receiver(Message message) throws Exception {  
        		Channel channel = (com.rabbitmq.client.Channel) message.getHeaders().get(AmqpHeaders.CHANNEL);
        		Long deliveryTag = (Long) message.getHeaders().get(AmqpHeaders.DELIVERY_TAG);
            	System.out.println("Input Stream 1 接受数据：" + message);
            	System.out.println("消费完毕------------");
            	channel.basicAck(deliveryTag, false);
            }  
        }

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