一小时彻底搞懂RabbitMQ

windows上面安装rabbitmq-server-3.7.4.exe

首先需要安装otp_win64_20.3.exe

步骤1：安装Erlang

RabbitMQ 它依赖于Erlang,需要先安装Erlang。首先确定你的window电脑是32位还是64位，以下的安装以window 64位电脑举例。

Erlang官网：http://www.erlang.org/

rabbit安装注意事项：需要安装erlang20.3以上的版本

erlang21_win64下载地址：https://download.csdn.net/download/qq_38862234/10965869

环境配置：修改系统属性path下添加erlang的路径

安装的是不能存在中文目录，对于erl配置系统环境变量的时候，计算名称也不能存在中文

这样就表示erl环境变量安装成功了

Rabbitmq安装的时候不能存在中文，Rabbitmq安装成功之后，在windows的程序窗口会看到下面的菜单选项

1、windows安装成功之后，我们要使用Rabbitmq提供的管理控制台，我们需要开启管理控制台的插件命令，我们进入到D:\Program Files\RabbitMQ Server\rabbitmq_server-3.7.4\sbin目目录下，使用命令rabbitmq-plugins.bat安装下,插件安装完成之后，需要对rabbitmq服务进行重启，浏览器输入http://localhost:15672/，登录的用户名和密码都是guest，这样登录成功之后，说明应该就安装安装

d:\Program Files\RabbitMQ Server\rabbitmq_server-3.7.\sbin>rabbitmq-plugins.bat  enable rabbitmq_management

接下来我们要创建用户admin 密码和12345，已经对应的vhost

rabbitmq支持6种消息模式

每一种模式我们都需要进行详细的讲解和分析

简单模式Hello World

使用ConnectionFactory创建连接，实质上，此连接就是一个Socket连接，设置host为localhost来连接本地的RabbitMQ Server，设置Port为5672（默认队列连接端口），设置用户名和密码，如果未设置用户名和密码将默认使用guest/guest口令（当然，此口令仅能在localhost本地使用）。

使用channel.queueDeclare()来定义队列，在RabbitMQ中，队列仅能够创建一次，如果发现已经存在此队列，将会忽略此方法。

功能：一个生产者P发送消息到队列Q,一个消费者C接收

生产者实现思路：

创建连接工厂ConnectionFactory，设置服务地址127.0.0.1，端口号5672，设置用户名、密码、virtual host，从连接工厂中获取连接connection，使用连接创建通道channel，使用通道channel创建队列queue，使用通道channel向队列中发送消息，关闭通道和连接。

channel.QueueDeclare(queue: "hello",

                     durable: true,

                     exclusive: false,

                     autoDelete: false,

                     arguments: null);

queue: 队列名称

durable：是否持久化, 队列的声明默认是存放到内存中的，如果rabbitmq重启会丢失，如果想重启之后还存在就要使队列持久化，保存到Erlang自带的Mnesia数据库中，当rabbitmq重启之后会读取该数据库

exclusive：是否排外的，有两个作用，一：当连接关闭时connection.close()该队列是否会自动删除；二：该队列是否是私有的private，如果不是排外的，可以使用两个消费者都访问同一个队列，没有任何问题，如果是排外的，会对当前队列加锁，其他通道channel是不能访问的，如果强制访问会报异常：com.rabbitmq.client.ShutdownSignalException: channel error; protocol method: #method<channel.close>(reply-code=405, reply-text=RESOURCE_LOCKED - cannot obtain exclusive access to locked queue 'queue_name' in vhost '/', class-id=50, method-id=20)一般等于true的话用于一个队列只能有一个消费者来消费的场景

autoDelete：是否自动删除，当最后一个消费者断开连接之后队列是否自动被删除，可以通过RabbitMQ Management，查看某个队列的消费者数量，当consumers = 0时队列就会自动删除

arguments：
队列中的消息什么时候会自动被删除？

Message TTL(x-message-ttl)：设置队列中的所有消息的生存周期(统一为整个队列的所有消息设置生命周期), 也可以在发布消息的时候单独为某个消息指定剩余生存时间,单位毫秒, 类似于redis中的ttl，生存时间到了，消息会被从队里中删除，注意是消息被删除，而不是队列被删除，特性Features=TTL, 单独为某条消息设置过期时间AMQP.BasicProperties.Builder properties = new AMQP.BasicProperties().builder().expiration(“6000”);
channel.basicPublish(EXCHANGE_NAME, “”, properties.build(), message.getBytes(“UTF-8”));

Auto Expire(x-expires): 当队列在指定的时间没有被访问(consume, basicGet, queueDeclare…)就会被删除,Features=Exp

Max Length(x-max-length): 限定队列的消息的最大值长度，超过指定长度将会把最早的几条删除掉，类似于mongodb中的固定集合，例如保存最新的100条消息, Feature=Lim

Max Length Bytes(x-max-length-bytes): 限定队列最大占用的空间大小，一般受限于内存、磁盘的大小, Features=Lim B

Dead letter exchange(x-dead-letter-exchange)：当队列消息长度大于最大长度、或者过期的等，将从队列中删除的消息推送到指定的交换机中去而不是丢弃掉,Features=DLX

Dead letter routing key(x-dead-letter-routing-key)：将删除的消息推送到指定交换机的指定路由键的队列中去, Feature=DLK

Maximum priority(x-max-priority)：优先级队列，声明队列时先定义最大优先级值(定义最大值一般不要太大)，在发布消息的时候指定该消息的优先级，优先级更高（数值更大的）的消息先被消费,

Lazy mode(x-queue-mode=lazy)： Lazy Queues: 先将消息保存到磁盘上，不放在内存中，当消费者开始消费的时候才加载到内存中

Master locator(x-queue-master-locator)

http://www.voidcn.com/article/p-dcbgmfmb-bpw.html

参加博客：https://www.cnblogs.com/leocook/p/mq_rabbitmq_3.html

第一种

void basicPublish(String exchange, String routingKey, boolean mandatory, BasicProperties props, byte[] body)

            throws IOException;

exchange 交换器名称
routingKey 路由键
props 有14个成员

我们来看下代码

项目的pom.xml的依赖如下

<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.</modelVersion>

  <groupId>com</groupId>

  <artifactId>com.rabbitmq.test</artifactId>

  <version>0.0.-SNAPSHOT</version>

     <dependencies>

      <dependency>

      <groupId>com.rabbitmq</groupId>

      <artifactId>amqp-client</artifactId>

      <version>5.0.</version>

</dependency>

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

</project>

生产者的代码如下

package com.rabbitmq.test1;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

public class MessageProvider {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "hello";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        //获得连接：Rabbitmq中对于的connection

        Connection connection = factory.newConnection();

        //从connection中获得对应的channel

        Channel channel = connection.createChannel();

        //

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        String message = "hello world";

        channel.basicPublish("", QUEUE_NAME, null, message.getBytes());

        System.out.println(" 生产消息：‘" + message + "‘");

    }

}

这里最关键的就是两个地方，第一个就是channel.queueDeclare(QUEUE_NAME, false, false, false, null);

queue: 队列名称

arguments：
队列中的消息什么时候会自动被删除？

Auto Expire(x-expires): 当队列在指定的时间没有被访问(consume, basicGet, queueDeclare…)就会被删除,Features=Exp

Max Length Bytes(x-max-length-bytes): 限定队列最大占用的空间大小，一般受限于内存、磁盘的大小, Features=Lim B

Dead letter routing key(x-dead-letter-routing-key)：将删除的消息推送到指定交换机的指定路由键的队列中去, Feature=DLK

第二个就是：channel.basicPublish("", QUEUE_NAME, null, message.getBytes());

因为我们使用一个默认exchange，我们使用（””）来标识的。QUEUE_NAME队列的名称

package com.rabbitmq.test1;

import java.io.IOException;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

import com.rabbitmq.client.Consumer;

import com.rabbitmq.client.DefaultConsumer;

import com.rabbitmq.client.Envelope;

import com.rabbitmq.client.AMQP.BasicProperties;

public class MessageConsumer {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "hello";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        Connection connection = factory.newConnection();

        Channel channel = connection.createChannel();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        Consumer consumer = new DefaultConsumer(channel) {

            @Override

            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)

                    throws IOException {

                String message = new String(body, "UTF-8");

                System.out.println("消费端接收消息：" + message);

            }

        };

        //true  异步接收消息

        channel.basicConsume(QUEUE_NAME, true, consumer);

    }

}

两个消费者，消费者1的代码如下

package com.rabbitmq.test2;

import java.io.IOException;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

import com.rabbitmq.client.Consumer;

import com.rabbitmq.client.DefaultConsumer;

import com.rabbitmq.client.Envelope;

import com.rabbitmq.client.AMQP.BasicProperties;

public class MessageConsumer {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "worker";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        Connection connection = factory.newConnection();

        Channel channel = connection.createChannel();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        Consumer consumer = new DefaultConsumer(channel) {

            @Override

            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)

                    throws IOException {

                //模拟业务处理需要200毫秒

                try {

                    Thread.sleep();

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                String message = new String(body, "UTF-8");

                System.out.println("消费端1接收消息：" + message);

            }

        };

        //true  异步接收消息

        channel.basicConsume(QUEUE_NAME, true, consumer);

    }

}

package com.rabbitmq.test1;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

public class MessageProvider {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "hello";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        //获得连接：Rabbitmq中对于的connection

        Connection connection = factory.newConnection();

        //从connection中获得对应的channel

        Channel channel = connection.createChannel();

        //

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        String message = "hello world";

        channel.basicPublish("", QUEUE_NAME, null, message.getBytes());

        System.out.println(" 生产消息：‘" + message + "‘");

    }

}

我们来看下web管理控制台的展示

队列中可以看到我们创建的hello，点击hello可以看到队列中的具体指标

在创建队列的时候，可以指定队列中的消息是否持久化、队列中消息的具体参数TTL、是否过期、最大长度等

在Exchange交换页面，可以看到系统在对于的虚拟机下面会给我们创建6中默认的交换机类型

我们也可以自己创建一个Exchange

在概览页面可以查看当前消息实例的具体的信息有多少connection、channel、交换机、队列、消费这等信息

connection下面可以查看当前的connection的具体信息，以及当前connection下面存在多少个channel

在channel下面可以查看当前channel的具体流量信息

RabbitMQ学习总结第三篇：工作队列Work Queue

生产者可以产生多条消息，但是每一条消息默认只能被一个消费者消费，c1和c2默认采用轮询的策略消费

我们模拟生产者产生20条消息

package com.rabbitmq.test2;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

public class MessageProvider {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "worker";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        //获得连接：Rabbitmq中对于的connection

        Connection connection = factory.newConnection();

        //从connection中获得对应的channel

        Channel channel = connection.createChannel();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //

        for(int i = ;i < ;i++){

            String message = "hello world"+i;

            channel.basicPublish("", QUEUE_NAME, null, message.getBytes());

            System.out.println(" 生产消息：‘" + message + "‘");

            Thread.sleep(i);

        }

      channel.close();

      connection.close();

    }

}

消费者2的代码如下

package com.rabbitmq.test2;

import java.io.IOException;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

import com.rabbitmq.client.Consumer;

import com.rabbitmq.client.DefaultConsumer;

import com.rabbitmq.client.Envelope;

import com.rabbitmq.client.AMQP.BasicProperties;

public class MessageConsumer2 {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "worker";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        Connection connection = factory.newConnection();

        Channel channel = connection.createChannel();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        Consumer consumer = new DefaultConsumer(channel) {

            @Override

            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)

                    throws IOException {

                //模拟业务处理需要200毫秒

                try {

                    Thread.sleep();

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                String message = new String(body, "UTF-8");

                System.out.println("消费端2接收消息：" + message);

            }

        };

        //true  异步接收消息

        channel.basicConsume(QUEUE_NAME, true, consumer);

    }

}

我们来看下日志的打印

生产者产生的20条消息，消费者1消费了10条，消费者2默认消费了10条，使用的是轮询的策略，默认情况下，RabbitMQ会把每个消息以此轮询发到各个消费者那，把消息平均的发到各个消费者那。这种分配管理的方式叫轮询，还可以测试多个worker的情形。

但是上面的这种work模式存在一定的问题，

你可能会注意到有的时候RabbitMQ不能像你预想中的那样分发消息。例如有两个worker，第奇数个消息对应的任务都很耗时，第偶数个消息对应的任务都很快就能执行完。这样的话其中有个worker就会一直都很繁忙，另外一个worker几乎不做任务。RabbitMQ不会去对这种现象做任何处理，依然均匀的去推送消息。

这是因为RabbitMQ在消息被生产者推送过来后就被推送到消费者端，它不会去查看未接收到消费者确认的消息数量。它只会把N个消息均与的分发到N个消费者那。

为了能解决这个问题，我们可以使用basicQos放来来设置消费者最多会同时接收多少个消息。这里设置为1，表示RabbitMQ同一时间发给消费者的消息不超过一条。这样就能保证消费者在处理完某个任务，并发送确认信息后，RabbitMQ才会向它推送新的消息，在此之间若是有新的消息话，将会被推送到其它消费者，若所有的消费者都在处理任务，那么就会等待。，这里我们来看下消费者代码的修改

我们来看下代码，注意修改消费者的代码

package com.rabbitmq.test2;

import java.io.IOException;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

import com.rabbitmq.client.Consumer;

import com.rabbitmq.client.DefaultConsumer;

import com.rabbitmq.client.Envelope;

import com.rabbitmq.client.AMQP.BasicProperties;

public class MessageConsumer {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "worker";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        Connection connection = factory.newConnection();

        final Channel channel = connection.createChannel();

        channel.basicQos();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        Consumer consumer = new DefaultConsumer(channel) {

            @Override

            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)

                    throws IOException {

                //模拟业务处理需要200毫秒

                try {

                    Thread.sleep();

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                String message = new String(body, "UTF-8");

                System.out.println("消费端1接收消息：" + message);

                //envelope.getDeliveryTag()获得当前需要收到ack的消息的编号

                //false表示仅仅ack当前的消费，如果内存中给还存在多条消费没有ack，是否批量回复。false表示不批量回复

                channel.basicAck(envelope.getDeliveryTag(), false);

            }

        };

        //true  异步接收消息

        channel.basicConsume(QUEUE_NAME, false, consumer);

    }

}

消费者的代码需要修改下面的三个地方

1、将消费的自动ack修改为需要人为的手动ack

channel.basicConsume(QUEUE_NAME, false, consumer);

2、增加手动ack消息的代码，ack不需要批量回复

//envelope.getDeliveryTag()获得当前需要收到ack的消息的编号
//false表示仅仅ack当前的消费，如果内存中给还存在多条消费没有ack，是否批量回复。false表示不批量回复
channel.basicAck(envelope.getDeliveryTag(), false);

3、增加代码 channel.basicQos(1);

修改之后我们来看下日志的打印

RabbitMQ学习总结第四篇：发布/订阅 Publish/Subscribe

上篇中我们实现了Work Queue的创建，在Work Queue背后，其实是rabbitMQ把每条任务消息只发给一个消费者。本篇中我们将要研究如何把一条消息推送给多个消费者，这种模式被称为publish/subscribe（发布/订阅）。

接下来我们实现发布一条消息，多个消费者都能够接受到

生产者者可以把消息发送到exchange（消息交换机）上。exchange是一个很简单的事情，它一边接收生产者的消息，另一边再把消息推送到消息队列中。Exchange必须知道在它接收到一条消息时应该怎么去处理。应该把这条消息推送到指定的消息队列中？还是把消息推送到所有的队列中？或是把消息丢掉？这些规则都可以用exchange类型来定义。

有一些可用的exchange类型：direct, topic, headers和fanout。这里我们主要看最后一个：fanout，这里我们创建一个名字为logs、类型为fanout的exchange:

channel.exchangeDeclare("logs", "fanout");

fanout类型的exchange是很简单的。就是它把它能接收到的所有消息广播到它知道的所有队列中

我们来看下代码

发送日志消息的生产者程序和之前的程序没有太多的差别。最大的区别就是我们把消息推送到一个命名的exchange上，而不是之前未命名的默认exchange。在我们发送消息时需要提供一个routingKey，但对于fanout类型的exchange可以忽略。下边是生产者的代码EmitLog.java：

package com.rabbitmq.test3;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

public class MessageProvider {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "worker";

    private static final String EXCHANGE_NAME = "public-exchange";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        //获得连接：Rabbitmq中对于的connection

        Connection connection = factory.newConnection();

        //从connection中获得对应的channel

        Channel channel = connection.createChannel();

        //channel发送消息到交换机,采用fanout类型

        channel.exchangeDeclare(EXCHANGE_NAME, "fanout");

        //channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //

        for(int i = ;i < ;i++){

            String message = "hello world"+i;

            channel.basicPublish(EXCHANGE_NAME,"", null, message.getBytes());

            System.out.println(" 生产消息：‘" + message + "‘");

            Thread.sleep(i);

        }

      channel.close();

      connection.close();

    }

}

改动点有下面的三处：

1、channel与交换机进行绑定，数据channel发送到Exchange中，交换机采用fanout类型，把消息发送到全部和改Exchange绑定的队列中

channel.exchangeDeclare(EXCHANGE_NAME, "fanout");

2、发送消息的时候，是发送给交换机，不再是发送给消息队列

channel.basicPublish(EXCHANGE_NAME,"", null, message.getBytes());

我们再来看消费者的代码

1、消费者1的队列是fanout1，需要将fanout1队列和生产者的Exchange进行绑定

2、消费者2的队列是fanout2，需要将fanout2队列和生产者的Exchange进行绑定

2、生产者发布了5条消息，消费者1和消费者2都能够收到这5条消息，我们来看下代码

package com.rabbitmq.test3;

import java.io.IOException;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

import com.rabbitmq.client.Consumer;

import com.rabbitmq.client.DefaultConsumer;

import com.rabbitmq.client.Envelope;

import com.rabbitmq.client.AMQP.BasicProperties;

public class MessageConsumer {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "fanout1";

    private static final String EXCHANGE_NAME = "public-exchange";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        Connection connection = factory.newConnection();

        final Channel channel = connection.createChannel();

        channel.basicQos();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //把队列绑定到交换机中

        channel.queueBind(QUEUE_NAME,EXCHANGE_NAME, "");

        Consumer consumer = new DefaultConsumer(channel) {

            @Override

            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)

                    throws IOException {

                //模拟业务处理需要200毫秒

                try {

                    Thread.sleep();

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                String message = new String(body, "UTF-8");

                System.out.println("消费端1接收消息：" + message);

                //envelope.getDeliveryTag()获得当前需要收到ack的消息的编号

                //false表示仅仅ack当前的消费，如果内存中给还存在多条消费没有ack，是否批量回复。false表示不批量回复

                channel.basicAck(envelope.getDeliveryTag(), false);

            }

        };

        //true  异步接收消息

        channel.basicConsume(QUEUE_NAME, false, consumer);

    }

}

package com.rabbitmq.test3;

import java.io.IOException;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

import com.rabbitmq.client.Consumer;

import com.rabbitmq.client.DefaultConsumer;

import com.rabbitmq.client.Envelope;

import com.rabbitmq.client.AMQP.BasicProperties;

public class MessageConsumer2 {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "fanout2";

    private static final String EXCHANGE_NAME = "public-exchange";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        Connection connection = factory.newConnection();

        final Channel channel = connection.createChannel();

        //设置消费者预取得消费的数量

        channel.basicQos();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //把队列绑定到交换机中

        channel.queueBind(QUEUE_NAME,EXCHANGE_NAME, "");

        Consumer consumer = new DefaultConsumer(channel) {

            @Override

            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)

                    throws IOException {

                //模拟业务处理需要200毫秒

                try {

                    Thread.sleep();

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                String message = new String(body, "UTF-8");

                System.out.println("消费端2接收消息：" + message);

                //envelope.getDeliveryTag()获得当前需要收到ack的消息的编号

                //false表示仅仅ack当前的消费，如果内存中给还存在多条消费没有ack，是否批量回复。false表示不批量回复

                channel.basicAck(envelope.getDeliveryTag(), false);

            }

        };

        //这里第二个参数要设置为false，表示取消自动ack，需要手动设置ack

        channel.basicConsume(QUEUE_NAME, false, consumer);

    }

}

我们来看下日志的打印信息如下

RabbitMQ学习总结第五篇：路由Routing

上面的publish模式中，Exchange会把全部的消息发送给与之绑定的队列中，下面我们可以采用路由的模式，Exchange只把消息发送到指定的队列中，使用direct模式

这里生产者需要做下面的修改，就是需要发送消息的时候，需要指定交换机依据那种bingkey进行发送，这里制定bingkey为error

package com.rabbitmq.test4;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

public class MessageProvider {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "worker";

    private static final String EXCHANGE_NAME = "public-exchange";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        //获得连接：Rabbitmq中对于的connection

        Connection connection = factory.newConnection();

        //从connection中获得对应的channel

        Channel channel = connection.createChannel();

        //channel发送消息到交换机,采用fanout类型

        channel.exchangeDeclare(EXCHANGE_NAME, "direct");

        //channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //

        for(int i = ;i < ;i++){

            String message = "hello world"+i;

            channel.basicPublish(EXCHANGE_NAME,"error", null, message.getBytes());

            System.out.println(" 生产消息：‘" + message + "‘");

            Thread.sleep(i);

        }

      channel.close();

      connection.close();

    }

}

生产者修改的代码如下：

1、指定交换机类型为 channel.exchangeDeclare(EXCHANGE_NAME, "direct");

2、指定交换机和队列绑定的key为error

channel.basicPublish(EXCHANGE_NAME,"error", null, message.getBytes());

消费者的代码需要修改为，当消费者队列与交换机绑定的时候，需要指定对于的bingkey

消费者1的代码为，bingkey为info， channel.queueBind(QUEUE_NAME,EXCHANGE_NAME, "info");

package com.rabbitmq.test4;

import java.io.IOException;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

import com.rabbitmq.client.Consumer;

import com.rabbitmq.client.DefaultConsumer;

import com.rabbitmq.client.Envelope;

import com.rabbitmq.client.AMQP.BasicProperties;

public class MessageConsumer {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "fanout1";

    private static final String EXCHANGE_NAME = "public-exchange";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        Connection connection = factory.newConnection();

        final Channel channel = connection.createChannel();

        channel.basicQos();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //把队列绑定到交换机中

        channel.queueBind(QUEUE_NAME,EXCHANGE_NAME, "info");

        Consumer consumer = new DefaultConsumer(channel) {

            @Override

            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)

                    throws IOException {

                //模拟业务处理需要200毫秒

                try {

                    Thread.sleep();

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                String message = new String(body, "UTF-8");

                System.out.println("消费端1接收消息：" + message);

                //envelope.getDeliveryTag()获得当前需要收到ack的消息的编号

                //false表示仅仅ack当前的消费，如果内存中给还存在多条消费没有ack，是否批量回复。false表示不批量回复

                channel.basicAck(envelope.getDeliveryTag(), false);

            }

        };

        //true  异步接收消息

        channel.basicConsume(QUEUE_NAME, false, consumer);

    }

}

消费者2的代码为，bingkey为error， channel.queueBind(QUEUE_NAME,EXCHANGE_NAME, "error");

package com.rabbitmq.test3;

import java.io.IOException;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

import com.rabbitmq.client.Consumer;

import com.rabbitmq.client.DefaultConsumer;

import com.rabbitmq.client.Envelope;

import com.rabbitmq.client.AMQP.BasicProperties;

public class MessageConsumer2 {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "fanout2";

    private static final String EXCHANGE_NAME = "public-exchange";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        Connection connection = factory.newConnection();

        final Channel channel = connection.createChannel();

        //设置消费者预取得消费的数量

        channel.basicQos();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //把队列绑定到交换机中

        channel.queueBind(QUEUE_NAME,EXCHANGE_NAME, "info");

        Consumer consumer = new DefaultConsumer(channel) {

            @Override

            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)

                    throws IOException {

                //模拟业务处理需要200毫秒

                try {

                    Thread.sleep();

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                String message = new String(body, "UTF-8");

                System.out.println("消费端2接收消息：" + message);

                //envelope.getDeliveryTag()获得当前需要收到ack的消息的编号

                //false表示仅仅ack当前的消费，如果内存中给还存在多条消费没有ack，是否批量回复。false表示不批量回复

                channel.basicAck(envelope.getDeliveryTag(), false);

            }

        };

        //这里第二个参数要设置为false，表示取消自动ack，需要手动设置ack

        channel.basicConsume(QUEUE_NAME, false, consumer);

    }

}

因为消费者2指定的bingkey和生产者中的bingkey一样，所以消费者2能够收到生产者发送的数据，消费者1收不到，消费者1没有任何日志的打印

我们来看下日志

RabbitMQ学习总结第六篇：Topic类型的exchange

上面的交换机中的direct类型中，bingkey都必须是很明确的error或者info，如果bingkey要想使用通配符的模式，能否实现了，可以使用交换机的Topic模式

这些binding可以总结为：

Q1对所有橘色的（orange）的动物感兴趣；
Q2希望能拿到所有兔子的（rabbit）信息，还有比较懒惰的（lazy.#）动物信息。

一条以” quick.orange.rabbit”为routing key的消息将会推送到Q1和Q2两个queue上，routing key为“lazy.orange.elephant”的消息同样会被推送到Q1和Q2上。但如果routing key为”quick.orange.fox”的话，消息只会被推送到Q1上；routing key为”lazy.brown.fox”的消息会被推送到Q2上，routing key为"lazy.pink.rabbit”的消息也会被推送到Q2上，但同一条消息只会被推送到Q2上一次。

如果在发送消息时所指定的exchange和routing key在消费者端没有对应的exchange和binding key与之绑定的话，那么这条消息将会被丢弃掉。例如："orange"和"quick.orange.male.rabbit"。但是routing为”lazy.orange.male.rabbit”的消息，将会被推到Q2上。

我们来看下代码

生产者的代码

package com.rabbitmq.test5;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

public class MessageProvider {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "worker";

    private static final String EXCHANGE_NAME = "topic-exchange";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        //获得连接：Rabbitmq中对于的connection

        Connection connection = factory.newConnection();

        //从connection中获得对应的channel

        Channel channel = connection.createChannel();

        //channel发送消息到交换机,采用fanout类型

        channel.exchangeDeclare(EXCHANGE_NAME, "topic");

        //channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //

        for(int i = ;i < ;i++){

            String message = "hello world"+i;

            channel.basicPublish(EXCHANGE_NAME,"lazy.1", null, message.getBytes());

            System.out.println(" 生产消息：‘" + message + "‘");

            Thread.sleep(i);

        }

      channel.close();

      connection.close();

    }

}

生产者使用topic模式，bingkey为"lazy.1"，那么消费者的bingkey为lazy.1和lazy.*都可以收到生产者发送的消息,*表示通配符全部所有的意思

我们来看消费者的全部代码为

package com.rabbitmq.test5;

import java.io.IOException;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

import com.rabbitmq.client.Consumer;

import com.rabbitmq.client.DefaultConsumer;

import com.rabbitmq.client.Envelope;

import com.rabbitmq.client.AMQP.BasicProperties;

public class MessageConsumer {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "fanout1";

    private static final String EXCHANGE_NAME = "topic-exchange";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        Connection connection = factory.newConnection();

        final Channel channel = connection.createChannel();

        channel.basicQos();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //把队列绑定到交换机中

        channel.queueBind(QUEUE_NAME,EXCHANGE_NAME, "lazy.1");

        Consumer consumer = new DefaultConsumer(channel) {

            @Override

            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)

                    throws IOException {

                //模拟业务处理需要200毫秒

                try {

                    Thread.sleep();

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                String message = new String(body, "UTF-8");

                System.out.println("消费端1接收消息：" + message);

                //envelope.getDeliveryTag()获得当前需要收到ack的消息的编号

                //false表示仅仅ack当前的消费，如果内存中给还存在多条消费没有ack，是否批量回复。false表示不批量回复

                channel.basicAck(envelope.getDeliveryTag(), false);

            }

        };

        //true  异步接收消息

        channel.basicConsume(QUEUE_NAME, false, consumer);

    }

}

package com.rabbitmq.test5;

import java.io.IOException;

import com.rabbitmq.client.Channel;

import com.rabbitmq.client.Connection;

import com.rabbitmq.client.ConnectionFactory;

import com.rabbitmq.client.Consumer;

import com.rabbitmq.client.DefaultConsumer;

import com.rabbitmq.client.Envelope;

import com.rabbitmq.client.AMQP.BasicProperties;

public class MessageConsumer2 {

    private static final String HOST = "127.0.0.1";

    private static final int PORT = ; // rabbitmq端口是5672

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "";

    private static final String QUEUE_NAME = "fanout2";

    private static final String EXCHANGE_NAME = "topic-exchange";

    public static void main(String[] args) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(HOST);

        factory.setPort(PORT);

        factory.setUsername(USERNAME);

        factory.setPassword(PASSWORD);

        factory.setVirtualHost("vhost01");

        Connection connection = factory.newConnection();

        final Channel channel = connection.createChannel();

        //设置消费者预取得消费的数量

        channel.basicQos();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        //把队列绑定到交换机中

        channel.queueBind(QUEUE_NAME,EXCHANGE_NAME, "lazy.*");

        Consumer consumer = new DefaultConsumer(channel) {

            @Override

            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)

                    throws IOException {

                //模拟业务处理需要200毫秒

                try {

                    Thread.sleep();

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                String message = new String(body, "UTF-8");

                System.out.println("消费端2接收消息：" + message);

                //envelope.getDeliveryTag()获得当前需要收到ack的消息的编号

                //false表示仅仅ack当前的消费，如果内存中给还存在多条消费没有ack，是否批量回复。false表示不批量回复

                channel.basicAck(envelope.getDeliveryTag(), false);

            }

        };

        //这里第二个参数要设置为false，表示取消自动ack，需要手动设置ack

        channel.basicConsume(QUEUE_NAME, false, consumer);

    }

}

巴特西

一小时彻底搞懂RabbitMQ

简单模式Hello World

RabbitMQ学习总结第四篇：发布/订阅 Publish/Subscribe

RabbitMQ学习总结第五篇：路由Routing

最新文章

热门文章

巴特西

一小时彻底搞懂RabbitMQ

简单模式Hello World

RabbitMQ学习总结 第四篇：发布/订阅 Publish/Subscribe

RabbitMQ学习总结 第五篇：路由Routing

最新文章

热门文章

RabbitMQ学习总结第四篇：发布/订阅 Publish/Subscribe

RabbitMQ学习总结第五篇：路由Routing