RabbitMQ之Topics(萬用字元模式)
阿新 • • 發佈:2018-11-12
說明:此模式實在路由key模式的基礎上,使用了萬用字元來管理消費者接收訊息。生產者P傳送訊息到交換機X,type=topic,交換機根據繫結佇列的routing key的值進行萬用字元匹配;
符號#:匹配一個或者多個詞lazy.# 可以匹配lazy.irs或者lazy.irs.cor
符號*:只能匹配一個詞lazy.* 可以匹配lazy.irs或者lazy.cor
“ * ”的使用
生產者:
package com.toov5.topic; import java.io.IOException; import java.util.concurrent.TimeoutException;import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.toov5.utils.MQConnectionUtils; //生產者 交換機型別 producerFanout型別 public class TopicProducer { //交換機名稱 private static final String EXCHANGE_NAME = "my_topic"; public static void main(String[] args) throws IOException, TimeoutException {//建立MQ連線 Connection connection = MQConnectionUtils.newConnection(); //建立通道 Channel channel = connection.createChannel(); //生產者繫結交換機 channel.exchangeDeclare(EXCHANGE_NAME, "topic"); //交換機名稱 交換機型別 String routingKey="log.email"; //訊息只會給郵件型別的//建立對應的訊息 String msString = "my_Routing_destination_msg"+routingKey; //通過頻道 傳送訊息 System.out.println("生產者投遞訊息:"+msString); channel.basicPublish(EXCHANGE_NAME, routingKey, null, msString.getBytes()); //關閉通道 和 連線 channel.close(); connection.close(); } }
消費者:
package com.toov5.topic; import java.io.IOException; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.rabbitmq.client.DefaultConsumer; import com.rabbitmq.client.Envelope; import com.rabbitmq.client.AMQP.BasicProperties; import com.toov5.utils.MQConnectionUtils; //郵件消費者 public class ConsumerSMSTopic { private static final String SMS_QUEUE ="sms_queue_topic"; //交換機名稱 private static final String EXCHANGE_NAME = "my_topic"; public static void main(String[] args) throws IOException, TimeoutException { System.out.println("簡訊消費者啟動"); //建立MQ連線 Connection connection = MQConnectionUtils.newConnection(); //建立通道 Channel channel = connection.createChannel(); //消費者宣告佇列 channel.queueDeclare(SMS_QUEUE, false, false, false, null); //消費者佇列繫結 路由 channel.queueBind(SMS_QUEUE, EXCHANGE_NAME, "log.*"); //消費者監聽訊息 DefaultConsumer defaultConsumer = new DefaultConsumer(channel) { //重寫監聽方法 @Override public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body) throws IOException { String msg = new String(body,"UTF-8"); System.out.println("簡訊消費者獲取生產者訊息"+msg); } }; channel.basicConsume(SMS_QUEUE,true, defaultConsumer); //繫結佇列 事件監聽 } }
package com.toov5.topic; import java.io.IOException; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.rabbitmq.client.DefaultConsumer; import com.rabbitmq.client.Envelope; import com.rabbitmq.client.AMQP.BasicProperties; import com.toov5.utils.MQConnectionUtils; //郵件消費者 public class ConsumerEmailTopic { private static final String EMAIL_QUEUE ="email_queue_topic"; //交換機名稱 private static final String EXCHANGE_NAME = "my_topic"; public static void main(String[] args) throws IOException, TimeoutException { System.out.println("郵件消費者啟動"); //建立MQ連線 Connection connection = MQConnectionUtils.newConnection(); //建立通道 Channel channel = connection.createChannel(); //消費者宣告佇列 channel.queueDeclare(EMAIL_QUEUE, false, false, false, null); //消費者佇列繫結 路由 channel.queueBind(EMAIL_QUEUE, EXCHANGE_NAME, "log.email"); //消費者監聽訊息 DefaultConsumer defaultConsumer = new DefaultConsumer(channel) { //重寫監聽方法 @Override public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body) throws IOException { String msg = new String(body,"UTF-8"); System.out.println("郵件消費者獲取生產者訊息"+msg); } }; channel.basicConsume(EMAIL_QUEUE,true, defaultConsumer); //繫結佇列 事件監聽 } }
可以看到兩個消費者都可以接收到
換成 “#”
生產者:
package com.toov5.topic; import java.io.IOException; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.toov5.utils.MQConnectionUtils; //生產者 交換機型別 producerFanout型別 public class TopicProducer { //交換機名稱 private static final String EXCHANGE_NAME = "my_topic"; public static void main(String[] args) throws IOException, TimeoutException { //建立MQ連線 Connection connection = MQConnectionUtils.newConnection(); //建立通道 Channel channel = connection.createChannel(); //生產者繫結交換機 channel.exchangeDeclare(EXCHANGE_NAME, "topic"); //交換機名稱 交換機型別 String routingKey="log.email.sms"; //訊息只會給郵件型別的 //建立對應的訊息 String msString = "my_Routing_destination_msg"+routingKey; //通過頻道 傳送訊息 System.out.println("生產者投遞訊息:"+msString); channel.basicPublish(EXCHANGE_NAME, routingKey, null, msString.getBytes()); //關閉通道 和 連線 channel.close(); connection.close(); } }
消費者:
package com.toov5.topic; import java.io.IOException; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.rabbitmq.client.DefaultConsumer; import com.rabbitmq.client.Envelope; import com.rabbitmq.client.AMQP.BasicProperties; import com.toov5.utils.MQConnectionUtils; //郵件消費者 public class ConsumerSMSTopic { private static final String SMS_QUEUE ="sms_queue_topic"; //交換機名稱 private static final String EXCHANGE_NAME = "my_topic"; public static void main(String[] args) throws IOException, TimeoutException { System.out.println("簡訊消費者啟動"); //建立MQ連線 Connection connection = MQConnectionUtils.newConnection(); //建立通道 Channel channel = connection.createChannel(); //消費者宣告佇列 channel.queueDeclare(SMS_QUEUE, false, false, false, null); //消費者佇列繫結 路由 channel.queueBind(SMS_QUEUE, EXCHANGE_NAME, "log.#"); //消費者監聽訊息 DefaultConsumer defaultConsumer = new DefaultConsumer(channel) { //重寫監聽方法 @Override public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body) throws IOException { String msg = new String(body,"UTF-8"); System.out.println("簡訊消費者獲取生產者訊息"+msg); } }; channel.basicConsume(SMS_QUEUE,true, defaultConsumer); //繫結佇列 事件監聽 } }
package com.toov5.topic; import java.io.IOException; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.rabbitmq.client.DefaultConsumer; import com.rabbitmq.client.Envelope; import com.rabbitmq.client.AMQP.BasicProperties; import com.toov5.utils.MQConnectionUtils; //郵件消費者 public class ConsumerEmailTopic { private static final String EMAIL_QUEUE ="email_queue_topic"; //交換機名稱 private static final String EXCHANGE_NAME = "my_topic"; public static void main(String[] args) throws IOException, TimeoutException { System.out.println("郵件消費者啟動"); //建立MQ連線 Connection connection = MQConnectionUtils.newConnection(); //建立通道 Channel channel = connection.createChannel(); //消費者宣告佇列 channel.queueDeclare(EMAIL_QUEUE, false, false, false, null); //消費者佇列繫結 路由 channel.queueBind(EMAIL_QUEUE, EXCHANGE_NAME, "log.email"); //消費者監聽訊息 DefaultConsumer defaultConsumer = new DefaultConsumer(channel) { //重寫監聽方法 @Override public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body) throws IOException { String msg = new String(body,"UTF-8"); System.out.println("郵件消費者獲取生產者訊息"+msg); } }; channel.basicConsume(EMAIL_QUEUE,true, defaultConsumer); //繫結佇列 事件監聽 } }
總結 “*” 匹配一個詞 “#”匹配多個詞