RabbitMQ 最常用的三大模式實例解析
更新時間：2019年12月10日 09:34:16 作者：海向
這篇文章主要介紹了RabbitMQ 最常用的三大模式實例解析,文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值,需要的朋友可以參考下
這篇文章主要介紹了RabbitMQ 最常用的三大模式實例解析,文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值,需要的朋友可以參考下
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 進行任何綁定(binding)操作。
- 消息傳遞時，RouteKey 必須完全匹配才會被隊列接收，否則該消息會被拋棄，
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 ConnectionFactory 并進行設(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 ConnectionFactory 并進行設(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，在管理界面手動綁定
channel.queueBind(queueName, exchangeName, routingKey);
//5. 創(chuàng)建消費者并接收消息
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 消費者綁定隊列
channel.basicConsume(queueName, true, consumer);
}
}
Send message : this is direct msg [x] Received 'this is direct msg'
Topic 模式
可以使用通配符進行模糊匹配
- 符號'#" 匹配一個或多個詞
- 符號"*”匹配不多不少一個詞
例如
- 'log.#"能夠匹配到'log.info.oa"
- "log.*"只會匹配到"log.erro“
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 ConnectionFactory 并進行設(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 ConnectionFactory 并進行設(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，在管理界面手動綁定
channel.queueBind(queueName, exchangeName, routingKey);
//5. 創(chuàng)建消費者并接收消息
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 消費者綁定隊列
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，只需要簡單的將隊列綁定到交換機上發(fā)送到交換機的消息都會被轉(zhuǎn)發(fā)到與該交換機綁定的所有隊列上。
Fanout交換機轉(zhuǎn)發(fā)消息是最快的。
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 ConnectionFactory 并進行設(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，在管理界面手動綁定
channel.queueBind(queueName, exchangeName, routingKey);
//5. 創(chuàng)建消費者并接收消息
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 消費者綁定隊列
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 ConnectionFactory 并進行設(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'
以上就是本文的全部內(nèi)容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。
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