溫馨提示×

您好，登錄后才能下訂單哦！

密碼登錄×
登錄注冊(cè)×
其他方式登錄
點(diǎn)擊 登錄注冊(cè) 即表示同意《億速云用戶服務(wù)條款》

一文解析 RabbitMQ 最常用的三大模式

發(fā)布時(shí)間：2020-08-10 19:32:44 來源：網(wǎng)絡(luò) 閱讀：163 作者：wx5d9ed7c8443c3 欄目：編程語言

Direct 模式

  • 所有發(fā)送到 Direct Exchange 的消息被轉(zhuǎn)發(fā)到 RouteKey 中指定的 Queue。

  • Direct 模式可以使用 RabbitMQ 自帶的 Exchange: default Exchange，所以不需要將 Exchange 進(jìn)行任何綁定(binding)操作。

  • 消息傳遞時(shí)，RouteKey 必須完全匹配才會(huì)被隊(duì)列接收，否則該消息會(huì)被拋棄，

一文解析 RabbitMQ 最常用的三大模式

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

public class DirectProducer {
    public static void main(String[] args) throws Exception {
        //1. 創(chuàng)建一個(gè) ConnectionFactory 并進(jìn)行設(shè)置
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        factory.setVirtualHost("/");
        factory.setUsername("guest");
        factory.setPassword("guest");

        //2. 通過連接工廠來創(chuàng)建連接
        Connection connection = factory.newConnection();

        //3. 通過 Connection 來創(chuàng)建 Channel
        Channel channel = connection.createChannel();

        //4. 聲明
        String exchangeName = "test_direct_exchange";
        String routingKey = "item.direct";

        //5. 發(fā)送
        String msg = "this is direct msg";
        channel.basicPublish(exchangeName, routingKey, null, msg.getBytes());
        System.out.println("Send message : " + msg);

        //6. 關(guān)閉連接
        channel.close();
        connection.close();
    }
}
import com.rabbitmq.client.*;
import java.io.IOException;

public class DirectConsumer {

    public static void main(String[] args) throws Exception {
        //1. 創(chuàng)建一個(gè) ConnectionFactory 并進(jìn)行設(shè)置
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        factory.setVirtualHost("/");
        factory.setUsername("guest");
        factory.setPassword("guest");
        factory.setAutomaticRecoveryEnabled(true);
        factory.setNetworkRecoveryInterval(3000);

        //2. 通過連接工廠來創(chuàng)建連接
        Connection connection = factory.newConnection();

        //3. 通過 Connection 來創(chuàng)建 Channel
        Channel channel = connection.createChannel();

        //4. 聲明
        String exchangeName = "test_direct_exchange";
        String queueName = "test_direct_queue";
        String routingKey = "item.direct";
        channel.exchangeDeclare(exchangeName, "direct", true, false, null);
        channel.queueDeclare(queueName, false, false, false, null);

        //一般不用代碼綁定，在管理界面手動(dòng)綁定
        channel.queueBind(queueName, exchangeName, routingKey);

        //5. 創(chuàng)建消費(fèi)者并接收消息
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope,
                                       AMQP.BasicProperties properties, byte[] body)
                    throws IOException {
                String message = new String(body, "UTF-8");
                System.out.println(" [x] Received '" + message + "'");
            }
        };

        //6. 設(shè)置 Channel 消費(fèi)者綁定隊(duì)列
        channel.basicConsume(queueName, true, consumer);

    }
}
 Send message : this is direct msg

 [x] Received 'this is direct msg'
Topic 模式

Topic 模式

可以使用通配符進(jìn)行模糊匹配

  • 符號(hào)'#" 匹配一個(gè)或多個(gè)詞

  • 符號(hào)"*”匹配不多不少一個(gè)詞

例如:

  • 'log.#"能夠匹配到'log.info.oa"

  • "log.*"只會(huì)匹配到"log.erro“

一文解析 RabbitMQ 最常用的三大模式

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

public class TopicProducer {

    public static void main(String[] args) throws Exception {
        //1. 創(chuàng)建一個(gè) ConnectionFactory 并進(jìn)行設(shè)置
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        factory.setVirtualHost("/");
        factory.setUsername("guest");
        factory.setPassword("guest");

        //2. 通過連接工廠來創(chuàng)建連接
        Connection connection = factory.newConnection();

        //3. 通過 Connection 來創(chuàng)建 Channel
        Channel channel = connection.createChannel();

        //4. 聲明
        String exchangeName = "test_topic_exchange";
        String routingKey1 = "item.update";
        String routingKey2 = "item.delete";
        String routingKey3 = "user.add";

        //5. 發(fā)送
        String msg = "this is topic msg";
        channel.basicPublish(exchangeName, routingKey1, null, msg.getBytes());
        channel.basicPublish(exchangeName, routingKey2, null, msg.getBytes());
        channel.basicPublish(exchangeName, routingKey3, null, msg.getBytes());
        System.out.println("Send message : " + msg);

        //6. 關(guān)閉連接
        channel.close();
        connection.close();
    }
}
import com.rabbitmq.client.*;
import java.io.IOException;

public class TopicConsumer {

    public static void main(String[] args) throws Exception {
        //1. 創(chuàng)建一個(gè) ConnectionFactory 并進(jìn)行設(shè)置
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        factory.setVirtualHost("/");
        factory.setUsername("guest");
        factory.setPassword("guest");
        factory.setAutomaticRecoveryEnabled(true);
        factory.setNetworkRecoveryInterval(3000);

        //2. 通過連接工廠來創(chuàng)建連接
        Connection connection = factory.newConnection();

        //3. 通過 Connection 來創(chuàng)建 Channel
        Channel channel = connection.createChannel();

        //4. 聲明
        String exchangeName = "test_topic_exchange";
        String queueName = "test_topic_queue";
        String routingKey = "item.#";
        channel.exchangeDeclare(exchangeName, "topic", true, false, null);
        channel.queueDeclare(queueName, false, false, false, null);

        //一般不用代碼綁定，在管理界面手動(dòng)綁定
        channel.queueBind(queueName, exchangeName, routingKey);

        //5. 創(chuàng)建消費(fèi)者并接收消息
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope,
                                       AMQP.BasicProperties properties, byte[] body)
                    throws IOException {
                String message = new String(body, "UTF-8");
                System.out.println(" [x] Received '" + message + "'");
            }
        };
        //6. 設(shè)置 Channel 消費(fèi)者綁定隊(duì)列
        channel.basicConsume(queueName, true, consumer);

    }
}
Send message : this is topc msg

[x] Received 'this is topc msg'
[x] Received 'this is topc msg'

Fanout 模式

不處理路由鍵，只需要簡(jiǎn)單的將隊(duì)列綁定到交換機(jī)上發(fā)送到交換機(jī)的消息都會(huì)被轉(zhuǎn)發(fā)到與該交換機(jī)綁定的所有隊(duì)列上。
Fanout交換機(jī)轉(zhuǎn)發(fā)消息是最快的。

一文解析 RabbitMQ 最常用的三大模式

import com.rabbitmq.client.*;
import java.io.IOException;

public class FanoutConsumer {
    public static void main(String[] args) throws Exception {
        //1. 創(chuàng)建一個(gè) ConnectionFactory 并進(jìn)行設(shè)置
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        factory.setVirtualHost("/");
        factory.setUsername("guest");
        factory.setPassword("guest");
        factory.setAutomaticRecoveryEnabled(true);
        factory.setNetworkRecoveryInterval(3000);

        //2. 通過連接工廠來創(chuàng)建連接
        Connection connection = factory.newConnection();

        //3. 通過 Connection 來創(chuàng)建 Channel
        Channel channel = connection.createChannel();

        //4. 聲明
        String exchangeName = "test_fanout_exchange";
        String queueName = "test_fanout_queue";
        String routingKey = "item.#";
        channel.exchangeDeclare(exchangeName, "fanout", true, false, null);
        channel.queueDeclare(queueName, false, false, false, null);

        //一般不用代碼綁定，在管理界面手動(dòng)綁定
        channel.queueBind(queueName, exchangeName, routingKey);

        //5. 創(chuàng)建消費(fèi)者并接收消息
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope,
                                       AMQP.BasicProperties properties, byte[] body)
                    throws IOException {
                String message = new String(body, "UTF-8");
                System.out.println(" [x] Received '" + message + "'");
            }
        };

        //6. 設(shè)置 Channel 消費(fèi)者綁定隊(duì)列
        channel.basicConsume(queueName, true, consumer);
    }
}
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
public class FanoutProducer {

    public static void main(String[] args) throws Exception {
        //1. 創(chuàng)建一個(gè) ConnectionFactory 并進(jìn)行設(shè)置
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        factory.setVirtualHost("/");
        factory.setUsername("guest");
        factory.setPassword("guest");

        //2. 通過連接工廠來創(chuàng)建連接
        Connection connection = factory.newConnection();

        //3. 通過 Connection 來創(chuàng)建 Channel
        Channel channel = connection.createChannel();

        //4. 聲明
        String exchangeName = "test_fanout_exchange";
        String routingKey1 = "item.update";
        String routingKey2 = "";
        String routingKey3 = "ookjkjjkhjhk";//任意routingkey

        //5. 發(fā)送
        String msg = "this is fanout msg";
        channel.basicPublish(exchangeName, routingKey1, null, msg.getBytes());
        channel.basicPublish(exchangeName, routingKey2, null, msg.getBytes());
        channel.basicPublish(exchangeName, routingKey3, null, msg.getBytes());
        System.out.println("Send message : " + msg);

        //6. 關(guān)閉連接
        channel.close();
        connection.close();
    }
}
Send message : this is fanout msg

[x] Received 'this is fanout msg'
[x] Received 'this is fanout msg'
[x] Received 'this is fanout msg'
向AI問一下細(xì)節(jié)

免責(zé)聲明：本站發(fā)布的內(nèi)容（圖片、視頻和文字）以原創(chuàng)、轉(zhuǎn)載和分享為主，文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng)，如果涉及侵權(quán)請(qǐng)聯(lián)系站長(zhǎng)郵箱：is@yisu.com進(jìn)行舉報(bào)，并提供相關(guān)證據(jù)，一經(jīng)查實(shí)，將立刻刪除涉嫌侵權(quán)內(nèi)容。

AI
助
手