【RabbitMQ】01 简单模式

 参考自腾讯云的实验课堂，减少部署时间的折腾

1、创建Erlang.Repo库

curl -s https://packagecloud.io/install/repositories/rabbitmq/erlang/script.rpm.sh | sudo bash

2、安装Erlang

yum install -y erlang

3、创建RabbitMQ-Server.Repo库

curl -s https://packagecloud.io/install/repositories/rabbitmq/rabbitmq-server/script.rpm.sh | sudo bash

4、安装RabbitMQ-Server

yum install -y rabbitmq-server 

5、开机自启动设置（可选）

chkconfig rabbitmq-server on

6、服务启动

service rabbitmq-server start

7、开启访问页面

rabbitmq-plugins enable rabbitmq_management

8、添加登录账号

rabbitmqctl add_user test 123456

9、账号权限设置

rabbitmqctl set_user_tags test administrator
rabbitmqctl set_permissions -p "/" test ".*" ".*" ".*"

10、访问后台信息：

http://192.168.2.121:15672/
test 
123456

11、服务停止

service rabbitmq-server stop

访问不了，关闭防火墙处理：

systemctl stop firewalld.service            #停止firewall
systemctl disable firewalld.service        #禁止firewall开机启动

参考腾讯云实验室，很多东西在这里搞安装教程贼方便

https://cloud.tencent.com/developer/labs/gallery

防止依赖缺失，还是加上这段命令：

yum install -y build-essential 
unixODBC 
unixODBC-devel 
kernel-devel 
m4 
tk 
tc 
xz 
gcc 
gcc-c++ 
glibc-devel 
make 
ncurses-devel 
openssl 
openssl-devel 
xmlto 
perl 
wget 
gtk2-devel 
binutils-devel 

 草，一年前写了，算了算了，留着吧

https://www.cnblogs.com/mindzone/p/13660810.html

创建消费者和生产者两个服务：

消费者编写了简答模式，pom只放了RabbitMQ的客户端

（这里写错位置了，要放到生产者里面）

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <parent>
        <artifactId>RabbitMQ</artifactId>
        <groupId>cn.dzz</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>ConsumerService</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.rabbitmq</groupId>
            <artifactId>amqp-client</artifactId>
            <version>5.6.0</version>
        </dependency>
    </dependencies>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

</project>

消息队列简单模式代码：

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

import java.nio.charset.StandardCharsets;

public class RabbitMqTest {

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

        ConnectionFactory connectionFactory = new ConnectionFactory();

        connectionFactory.setHost("192.168.2.121");
        connectionFactory.setPort(ConnectionFactory.DEFAULT_AMQP_PORT); // 5672
        connectionFactory.setVirtualHost("/dzz"); // 虚拟主机？ 默认值 /
        connectionFactory.setUsername("guest"); // guest
        connectionFactory.setPassword("guest"); // guest

        Connection connection = connectionFactory.newConnection();
        Channel channel = connection.createChannel();

        /**
         *  public com.rabbitmq.client.AMQP.Queue.DeclareOk queueDeclare(String queue, boolean durable, boolean exclusive, boolean autoDelete, Map<String, Object> arguments) throws IOException {
         *      com.rabbitmq.client.AMQP.Queue.DeclareOk ok = this.delegate.queueDeclare(queue, durable, exclusive, autoDelete, arguments);
         *      this.recordQueue(ok, queue, durable, exclusive, autoDelete, arguments);
         *      return ok;
         *  }
         *  String queue 队列名称？
         *  boolean durable 是否持久化？ 写入Erlang的库中，否则只存活在内存中，RabbitMQ服务重启，队列销毁
         *  boolean exclusive 是否独占？ 只允许一个消费者服务监听这个队列？ Connection对象关闭 是否删除队列
         *  boolean autoDelete 是否自动删除？ 没有消费者服务监听时自动删除
         *  Map<String, Object> arguments 参数信息， 自行设置
         *
         *  如果没有队列叫这个 hello_rabbitmq RabbitMQ会自动创建这个队列、
         */
        channel.queueDeclare("hello_rabbitmq", true, false, false, null);

        /**
         *  public void basicPublish(String exchange, String routingKey, BasicProperties props, byte[] body) throws IOException {
         *      this.delegate.basicPublish(exchange, routingKey, props, body);
         *  }
         *  String exchange 交换机名称，简单模式 使用默认交换机 ""
         *  String routingKey 路由名称 (由于使用的时默认交换机，路由名称和上面的队列名称一致)
         *  BasicProperties props 配置信息
         *  byte[] body 发送的消息数据
         */
        String body = "hello, rabbitMq !!!!";
        channel.basicPublish("", "hello_rabbitmq", null, body.getBytes(StandardCharsets.UTF_8));

        // 资源释放
        channel.close();
        connection.close();
    }
}

注意没开始之前，队列标签页没有任何信息：

 

执行代码之后：

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "main" com.rabbitmq.client.AuthenticationFailureException: ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile.
    at com.rabbitmq.client.impl.AMQConnection.start(AMQConnection.java:364)
    at com.rabbitmq.client.impl.recovery.RecoveryAwareAMQConnectionFactory.newConnection(RecoveryAwareAMQConnectionFactory.java:64)
    at com.rabbitmq.client.impl.recovery.AutorecoveringConnection.init(AutorecoveringConnection.java:156)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1106)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1063)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1021)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1182)
    at RabbitMqTest.main(RabbitMqTest.java:19)

Process finished with exit code 1

访问拒绝，是因为之前已经设置了RabbitMQ的账号信息

可以先用默认账号进行登录：

它提示这个账号仅限本机访问，由于安装在Linux上面，所以是非本机访问 

使用 test 123456 再次再次执行：

"C:Program Files (x86)Javajdk1.8.0_291injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2021.2.1libidea_rt.jar=59622:C:Program FilesJetBrainsIntelliJ IDEA 2021.2.1in" -Dfile.encoding=UTF-8 -classpath "C:Program Files (x86)Javajdk1.8.0_291jrelibcharsets.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibdeploy.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextaccess-bridge-32.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextcldrdata.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextdnsns.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextjaccess.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextjfxrt.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextlocaledata.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibext
ashorn.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunec.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunjce_provider.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunmscapi.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunpkcs11.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextzipfs.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjavaws.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjce.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjfr.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjfxswt.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjsse.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibmanagement-agent.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibplugin.jar;C:Program Files (x86)Javajdk1.8.0_291jrelib
esources.jar;C:Program Files (x86)Javajdk1.8.0_291jrelib
t.jar;C:UsersAdministratorIdeaProjectsRabbitMQConsumerService	arget	est-classes;C:UsersAdministrator.m2
epositorycom
abbitmqamqp-client5.6.0amqp-client-5.6.0.jar;C:UsersAdministrator.m2
epositoryorgslf4jslf4j-api1.7.25slf4j-api-1.7.25.jar" RabbitMqTest
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "main" java.io.IOException
    at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:129)
    at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:125)
    at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:147)
    at com.rabbitmq.client.impl.AMQConnection.start(AMQConnection.java:403)
    at com.rabbitmq.client.impl.recovery.RecoveryAwareAMQConnectionFactory.newConnection(RecoveryAwareAMQConnectionFactory.java:64)
    at com.rabbitmq.client.impl.recovery.AutorecoveringConnection.init(AutorecoveringConnection.java:156)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1106)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1063)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1021)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1182)
    at RabbitMqTest.main(RabbitMqTest.java:19)
Caused by: com.rabbitmq.client.ShutdownSignalException: connection error; protocol method: #method<connection.close>(reply-code=530, reply-text=NOT_ALLOWED - vhost /dzz not found, class-id=10, method-id=40)
    at com.rabbitmq.utility.ValueOrException.getValue(ValueOrException.java:66)
    at com.rabbitmq.utility.BlockingValueOrException.uninterruptibleGetValue(BlockingValueOrException.java:36)
    at com.rabbitmq.client.impl.AMQChannel$BlockingRpcContinuation.getReply(AMQChannel.java:502)
    at com.rabbitmq.client.impl.AMQChannel.privateRpc(AMQChannel.java:293)
    at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:141)
    ... 8 more

Process finished with exit code 1

虚拟主机未找到 得，还不是自动创建的，需要去面板上配置：

 

添加虚拟主机

 没有异常了，应该是发送成功了

"C:Program Files (x86)Javajdk1.8.0_291injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2021.2.1libidea_rt.jar=60801:C:Program FilesJetBrainsIntelliJ IDEA 2021.2.1in" -Dfile.encoding=UTF-8 -classpath "C:Program Files (x86)Javajdk1.8.0_291jrelibcharsets.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibdeploy.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextaccess-bridge-32.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextcldrdata.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextdnsns.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextjaccess.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextjfxrt.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextlocaledata.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibext
ashorn.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunec.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunjce_provider.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunmscapi.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunpkcs11.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextzipfs.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjavaws.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjce.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjfr.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjfxswt.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjsse.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibmanagement-agent.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibplugin.jar;C:Program Files (x86)Javajdk1.8.0_291jrelib
esources.jar;C:Program Files (x86)Javajdk1.8.0_291jrelib
t.jar;C:UsersAdministratorIdeaProjectsRabbitMQConsumerService	arget	est-classes;C:UsersAdministrator.m2
epositorycom
abbitmqamqp-client5.6.0amqp-client-5.6.0.jar;C:UsersAdministrator.m2
epositoryorgslf4jslf4j-api1.7.25slf4j-api-1.7.25.jar" RabbitMqTest
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

Process finished with exit code 0

查看队列面板上面就会多出一条记录：

 但是连接记录和频道记录都没有，原因是我们把资源释放掉了

现在把代码释放资源的部分注释掉，程序将不会停止

面板上面就会显示连接信息和频道信息

 

 

创建消费者，接收消息：

import com.rabbitmq.client.*;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

public class RabbitMqTest {

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

        ConnectionFactory connectionFactory = new ConnectionFactory();

        connectionFactory.setHost("192.168.2.121");
        connectionFactory.setPort(ConnectionFactory.DEFAULT_AMQP_PORT); // 5672
        connectionFactory.setVirtualHost("/dzz"); // 虚拟主机？ 默认值 /
        connectionFactory.setUsername("test"); // guest
        connectionFactory.setPassword("123456"); // guest

        Connection connection = connectionFactory.newConnection();
        Channel channel = connection.createChannel();

        /**
         *  public com.rabbitmq.client.AMQP.Queue.DeclareOk queueDeclare(String queue, boolean durable, boolean exclusive, boolean autoDelete, Map<String, Object> arguments) throws IOException {
         *      com.rabbitmq.client.AMQP.Queue.DeclareOk ok = this.delegate.queueDeclare(queue, durable, exclusive, autoDelete, arguments);
         *      this.recordQueue(ok, queue, durable, exclusive, autoDelete, arguments);
         *      return ok;
         *  }
         *  String queue 队列名称？
         *  boolean durable 是否持久化？ 写入Erlang的库中，否则只存活在内存中，RabbitMQ服务重启，队列销毁
         *  boolean exclusive 是否独占？ 只允许一个消费者服务监听这个队列？ Connection对象关闭 是否删除队列
         *  boolean autoDelete 是否自动删除？ 没有消费者服务监听时自动删除
         *  Map<String, Object> arguments 参数信息， 自行设置
         *
         *  如果没有队列叫这个 hello_rabbitmq RabbitMQ会自动创建这个队列、
         *
         *  对于消费者来说，队列声明不是必要的
         */
        channel.queueDeclare("hello_rabbitmq", true, false, false, null);

        /**
         *  消息接受
         *  public String basicConsume(String queue, boolean autoAck, Consumer callback) throws IOException {
         *      return this.basicConsume(queue, autoAck, "", callback);
         *  }
         *  String queue 队列名称
         *  boolean autoAck 是否自动确认
         *  Consumer callback 回调方法
         *
         *
         */
        Consumer consumer = new DefaultConsumer(channel) {
            /**
             * 消息收到的回调方法（自动执行）
             * @param consumerTag 标识
             * @param envelope RabbitMQ服务信息
             * @param properties 配置信息
             * @param body 收到的数据
             * @throws IOException
             */
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("consumerTag " + consumerTag);

                String exchange = envelope.getExchange();
                long deliveryTag = envelope.getDeliveryTag();
                String routingKey = envelope.getRoutingKey();

                System.out.println("exchange " + exchange);
                System.out.println("deliveryTag " + deliveryTag);
                System.out.println("routingKey " + routingKey);
                System.out.println("properties " + properties);

                System.out.println("body(message) " + new String(body, StandardCharsets.UTF_8));
                System.out.println("- - - - - over - - - - -");
            }
        };

        channel.basicConsume("hello_rabbitmq", true, consumer);


        // 资源释放 消费者需要一直监听发送过来的消息，不能关闭资源
        // channel.close();
        // connection.close();
    }
}

执行后输出打印：

从生产者发送的三条消息全部收到

"C:Program Files (x86)Javajdk1.8.0_291injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2021.2.1libidea_rt.jar=62981:C:Program FilesJetBrainsIntelliJ IDEA 2021.2.1in" -Dfile.encoding=UTF-8 -classpath "C:Program Files (x86)Javajdk1.8.0_291jrelibcharsets.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibdeploy.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextaccess-bridge-32.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextcldrdata.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextdnsns.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextjaccess.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextjfxrt.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextlocaledata.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibext
ashorn.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunec.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunjce_provider.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunmscapi.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextsunpkcs11.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibextzipfs.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjavaws.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjce.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjfr.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjfxswt.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibjsse.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibmanagement-agent.jar;C:Program Files (x86)Javajdk1.8.0_291jrelibplugin.jar;C:Program Files (x86)Javajdk1.8.0_291jrelib
esources.jar;C:Program Files (x86)Javajdk1.8.0_291jrelib
t.jar;C:UsersAdministratorIdeaProjectsRabbitMQConsumerService	arget	est-classes;C:UsersAdministrator.m2
epositorycom
abbitmqamqp-client5.6.0amqp-client-5.6.0.jar;C:UsersAdministrator.m2
epositoryorgslf4jslf4j-api1.7.25slf4j-api-1.7.25.jar" RabbitMqTest
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
consumerTag amq.ctag-DEOhj99q55lb2BDUqetVaQ
exchange 
deliveryTag 1
routingKey hello_rabbitmq
properties #contentHeader<basic>(content-type=null, content-encoding=null, headers=null, delivery-mode=null, priority=null, correlation-id=null, reply-to=null, expiration=null, message-id=null, timestamp=null, type=null, user-id=null, app-id=null, cluster-id=null)
body(message) hello, rabbitMq !!!!
- - - - - over - - - - -
consumerTag amq.ctag-DEOhj99q55lb2BDUqetVaQ
exchange 
deliveryTag 2
routingKey hello_rabbitmq
properties #contentHeader<basic>(content-type=null, content-encoding=null, headers=null, delivery-mode=null, priority=null, correlation-id=null, reply-to=null, expiration=null, message-id=null, timestamp=null, type=null, user-id=null, app-id=null, cluster-id=null)
body(message) hello, rabbitMq !!!!
- - - - - over - - - - -
consumerTag amq.ctag-DEOhj99q55lb2BDUqetVaQ
exchange 
deliveryTag 3
routingKey hello_rabbitmq
properties #contentHeader<basic>(content-type=null, content-encoding=null, headers=null, delivery-mode=null, priority=null, correlation-id=null, reply-to=null, expiration=null, message-id=null, timestamp=null, type=null, user-id=null, app-id=null, cluster-id=null)
body(message) hello, rabbitMq !!!!
- - - - - over - - - - -

可以看到连接和频道消费者和生产者的区别了

 

 

 消息存储是一个先进先出的方式，RabbitMQ像是一个缓存器，能把生产者发送的信息保存起来，等待消费者接收