JMS P2P（RAM角色跨账号授权场景）

收发消息流程

获取接入点

您需要在云消息队列 RabbitMQ 版控制台获取实例的接入点。在收发消息时，您需要为发布端和订阅端配置该接入点，通过接入点接入云消息队列 RabbitMQ 版实例。

1. 登录云消息队列 RabbitMQ 版控制台，然后在左侧导航栏选择实例列表。
2. 在实例列表页面的顶部菜单栏选择地域，然后在实例列表中，单击目标实例名称。
3. 在实例详情页面的接入点信息页签，将鼠标指针移动到目标类型的接入点，单击该接入点右侧的图标，复制该接入点。

   类型	说明	示例值
   公网接入点	公网环境可读写。按量付费实例默认支持，预付费实例需在购买时选择才支持。	XXX.mq-amqp.cn-hangzhou-a.aliyuncs.com
   VPC接入点	VPC环境可读写。按量付费实例和预付费实例默认都支持。	XXX.mq-amqp.cn-hangzhou-a-internal.aliyuncs.com

安装JMS依赖库

在pom.xml中添加以下依赖。

<dependency>
    <groupId>com.rabbitmq</groupId>
    <artifactId>amqp-client</artifactId>
    <version>5.5.0</version> <!-- 支持开源所有版本 -->
</dependency>
<dependency>
    <groupId>com.alibaba.mq-amqp.jms</groupId>
    <artifactId>mq-amqp-jms-client</artifactId>
    <version>1.11.2-1.0.0</version>
    <exclusions>
        <exclusion>
            <groupId>com.rabbitmq</groupId>
            <artifactId>amqp-client</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>com.alibaba.mq-amqp</groupId>
    <artifactId>mq-amqp-client</artifactId>
    <version>1.0.5</version>
</dependency>
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.4</version>
</dependency>
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-simple</artifactId>
    <version>1.7.25</version>
    <scope>compile</scope>
</dependency>

配置权限认证类（AliyunCredentialsProvider）

1. 新建一个.properties配置文件，将 AccessKeyID、AccessKeySecret和SecurityToken信息写入。参数填写说明，请参见参数列表。

   # Access Key ID.
   accessKeyId=${accessKeyId}
   # Access Key Secret.
   accessKeySecret=${accessKeySecret}
   # security temp token. (optional)
   securityToken=${securityToken}

2. 创建权限认证类AliyunCredentialsProvider.java，根据代码提示信息，设置相关参数。具体信息，请参见参数列表。

   import java.io.FileReader;
   import java.io.IOException;
   import java.util.Properties;
   
   import com.alibaba.mq.amqp.utils.UserUtils;
   import com.rabbitmq.client.impl.CredentialsProvider;
   import org.apache.commons.lang3.StringUtils;
   import java.security.InvalidKeyException;
   import java.security.NoSuchAlgorithmException;
   
   public class AliyunCredentialsProvider implements CredentialsProvider {
   
       /**
        * Access Key ID.
        */
       private static final String accessKeyId;
       /**
        * Access Key Secret.
        */
       private static final String accessKeySecret;
       /**
        * security temp token. (optional)
        */
       private static final String securityToken;
       /**
        * 实例ID，从云消息队列 RabbitMQ 版控制台获取。
        */
       private final String instanceId;
   
   
       // 阿里云账号AccessKey拥有所有API的访问权限，建议您使用RAM用户进行API访问或日常运维。
       // 强烈建议不要把AccessKey ID和AccessKey Secret保存到工程代码里，否则可能导致AccessKey泄露，威胁您账号下所有资源的安全。
       // 本示例以将AccessKey保存在配置文件中来实现身份验证为例。
       static {
           // 需要将${ConfigPath}修改为您创建的Properties文件的路径。
           String path = "${ConfigPath}";
           Properties properties = new Properties();
   
           try {
               properties.load(new FileReader(path));
           } catch (IOException e) {
               // 业务中自行处理读配置文件异常。
           }
   
           accessKeyId = properties.getProperty("accessKeyId");
           accessKeySecret = properties.getProperty("accessKeySecret");
           securityToken = properties.getProperty("securityToken");
   
       }
   
       public AliyunCredentialsProvider(final String instanceId) {
           this.instanceId = instanceId;
       }
   
       @Override
       public String getUsername() {
           if(StringUtils.isNotEmpty(securityToken)) {
               return UserUtils.getUserName(accessKeyId, instanceId, securityToken);
           } else {
               return UserUtils.getUserName(accessKeyId, instanceId);
           }
       }
   
       @Override
       public String getPassword() {
           try {
               return UserUtils.getPassord(accessKeySecret);
           } catch (InvalidKeyException e) {
               //todo
           } catch (NoSuchAlgorithmException e) {
               //todo
           }
           return null;
       }
   }

配置Object类型消息

import java.io.Serializable;

public class Person implements Serializable{
    
    private static final long serialVersionUID = -5809782578272943****;
    String name = null;
    int age = 0;
    String address =null;

    public Person(String name, int age, String address){
        this.name = name;
        this.age = age;
        this.address = address;
    }

    public String getName(){
        return name;
    }

    public int getAge(){
        return age;
    }

    public String getAddress(){
        return address;
    }
}

发送消息

创建并编译运行QueueSend.java生产消息。

import com.rabbitmq.jms.admin.RMQConnectionFactory;
import com.rabbitmq.jms.admin.RMQDestination;
import com.rabbitmq.jms.client.AmqpConnectionFactoryPostProcessor;
import javax.jms.*;
import java.io.Serializable;

public class QueueSend {

    public void sendTextMsg(Session session, String MsgContent, String name) throws JMSException {
        Destination queue = new RMQDestination(name, true, false);
        MessageProducer msgProducer = session.createProducer(queue);
        Message msg = session.createTextMessage(MsgContent);
        msgProducer.send(msg);
        System.out.println("文本类型消息已发送");
    }

    public void sendMap(Session session, MapMessage map, String name) throws JMSException {
        Destination queue = new RMQDestination(name, true, false);
        MessageProducer msgProducer = session.createProducer(queue);
        msgProducer.send(map);
        System.out.println("Map类型消息已发送");
    }

    public void sendObj(Session session, Person obj, String name) throws JMSException {
        Destination queue = new RMQDestination(name, true, false);
        MessageProducer msgProducer = session.createProducer(queue);
        ObjectMessage objMsg = session.createObjectMessage((Serializable) obj);
        MessageProducer msgPorducer = session.createProducer(queue);
        msgPorducer.send(objMsg);
        System.out.println("Object类型的消息已发送");
    }

    public static void main(String[] args) throws JMSException {
        final AliyunCredentialsProvider provider = new AliyunCredentialsProvider("${InstanceID}");
        RMQConnectionFactory connectionFactory = new RMQConnectionFactory();
        connectionFactory.setHost("xxx.xxx.aliyuncs.com");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("${VhostName}");
        connectionFactory.setAmqpConnectionFactoryPostProcessor(new AmqpConnectionFactoryPostProcessor() {
            @Override
            public void postProcess(com.rabbitmq.client.ConnectionFactory cf) {
                cf.setCredentialsProvider(provider);
                cf.setAutomaticRecoveryEnabled(true);
                cf.setNetworkRecoveryInterval(5000);
                System.out.println(cf.getPassword());
            }
        });
        Connection connection = connectionFactory.createConnection();
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        QueueSend qs = new QueueSend();
        qs.sendTextMsg(session, "发送JMS文本类型消息", "queue.msgText");
        MapMessage mapMsg = session.createMapMessage();
        mapMsg.setString("name", "李某");
        mapMsg.setBoolean("IsHero", false);
        mapMsg.setInt("age", 23);
        qs.sendMap(session, mapMsg, "queue.msgMap");
        Person person = new Person("李某", 23, "北京.大兴");
        qs.sendObj(session, person, "queue.msgObj");
        session.close();
        connection.close();
    }
}

订阅消息

创建并编译运行QueueAccept.java订阅消息。

import com.rabbitmq.jms.admin.RMQConnectionFactory;
import com.rabbitmq.jms.admin.RMQDestination;
import com.rabbitmq.jms.client.AmqpConnectionFactoryPostProcessor;
import javax.jms.*;

public class QueueAccept implements MessageListener {

    public void onMessage(Message message) {
        if (message instanceof TextMessage) {
            TextMessage text = (TextMessage) message;
            try {
                System.out.println("发送的文本消息内容为：" + text.getText());
            } catch (JMSException e) {
                e.printStackTrace();
            }
        }
        if (message instanceof MapMessage) {
            MapMessage map = (MapMessage) message;
            try {
                System.out.println("姓名：" + map.getString("name"));
                System.out.println("是否是英雄：" + map.getBoolean("IsHero"));
                System.out.println("年龄：" + map.getInt("age"));
            } catch (JMSException e) {
                e.printStackTrace();
            }
        }
        if (message instanceof ObjectMessage) {
            ObjectMessage objMsg = (ObjectMessage) message;
            try {
                Person person = (Person) objMsg.getObject();
                System.out.println("用户名：" + person.getName() + "，年龄：" + person.getAge() + "，地址：" + person.getAddress());
            } catch (JMSException e) {
                e.printStackTrace();
            }
        }
        try {
            message.acknowledge();
            System.out.println("消息手动确认");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws JMSException {
        RMQConnectionFactory connectionFactory = null;
        Connection connection = null;
        Session session = null;
        if (connectionFactory == null) {
            final AliyunCredentialsProvider provider = new AliyunCredentialsProvider("${InstanceID}");
            connectionFactory = new RMQConnectionFactory();
            connectionFactory.setHost("xxx.xxx.aliyuncs.com");
            connectionFactory.setPort(5672);
            connectionFactory.setVirtualHost("${VhostName}");
            connectionFactory.setAmqpConnectionFactoryPostProcessor(new AmqpConnectionFactoryPostProcessor() {
                @Override
                public void postProcess(com.rabbitmq.client.ConnectionFactory cf) {
                    cf.setCredentialsProvider(provider);
                    cf.setAutomaticRecoveryEnabled(true);
                    cf.setNetworkRecoveryInterval(5000);
                    System.out.println(cf.getPassword());
                }
            });
        }
        if (connection == null) {
            connection = connectionFactory.createConnection();
            connection.start();
        }
        session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
        Destination destination = new RMQDestination("queue.msgText", true, false);
        MessageConsumer consumer = session.createConsumer(destination);
        consumer.setMessageListener(new QueueAccept());
        Destination queue1 = new RMQDestination("queue.msgMap", true, false);
        MessageConsumer consumer1 = session.createConsumer(queue1);
        consumer1.setMessageListener(new QueueAccept());
        Destination queue2 = new RMQDestination("queue.msgObj", true, false);
        MessageConsumer consumer2 = session.createConsumer(queue2);
        consumer2.setMessageListener(new QueueAccept());
    }
}