网站开发费是无形资产吗,“设计网站”,徐州集团网站建设,wordpress嵌入外部网页Routing Direct
在Fanout模式中#xff0c;一条消息#xff0c;会被所有订阅的队列都消费。但是在某些场景下#xff0c;我们希望不同的消息被不同的队列消费。这时就要用到Direct类型的Exchange。
在Direct模型下#xff1a;
队列与交换机的绑定#xff0c;不能是任意…Routing Direct
在Fanout模式中一条消息会被所有订阅的队列都消费。但是在某些场景下我们希望不同的消息被不同的队列消费。这时就要用到Direct类型的Exchange。
在Direct模型下
队列与交换机的绑定不能是任意绑定了而是要指定一个RoutingKey路由key消息的发送方在向 Exchange发送消息时也必须指定消息的RoutingKey。Exchange不再把消息交给每一个绑定的队列而是根据消息的Routing Key进行判断只有队列的Routingkey与消息的Routing key完全一致才会接收到消息 P生产者向Exchange发送消息发送消息时会指定一个routing key。XExchange交换机接收生产者的消息然后把消息递交给与routing key完全匹配的队列。C1消费者其所在队列指定了需要routing key 为 error 的消息。C2消费者其所在队列指定了需要routing key 为 info、error、warning 的消息。
创建生产者
public class MyProducer {Testpublic void test() throws Exception {// 交换机String exchange logs_direct;// 创建工厂ConnectionFactory factory new ConnectionFactory();factory.setVirtualHost(/);factory.setHost(xuewei.world);factory.setUsername(xuewei);factory.setPassword(123456);factory.setPort(5672);// 创建连接和通道Connection connection factory.newConnection();Channel channel connection.createChannel();// 声明交换机channel.exchangeDeclare(exchange, direct);for (int i 0; i 3; i) {// 发布消息channel.basicPublish(exchange, DEBUG, null, (DEBUG LOG - i).getBytes());channel.basicPublish(exchange, INFO, null, (INFO LOG - i).getBytes());channel.basicPublish(exchange, WARN, null, (WARN LOG - i).getBytes());channel.basicPublish(exchange, ERROR, null, (ERROR LOG - i).getBytes());}}
}创建消费者1
public class MyConsumer1 {public static void main(String[] args) throws Exception {// 指定交换机String exchange logs_direct;// 创建工厂ConnectionFactory factory new ConnectionFactory();factory.setVirtualHost(/);factory.setHost(xuewei.world);factory.setUsername(xuewei);factory.setPassword(123456);factory.setPort(5672);// 创建连接和通道Connection connection factory.newConnection();Channel channel connection.createChannel();// 绑定交换机channel.exchangeDeclare(exchange, direct);// 创建临时队列String queue channel.queueDeclare().getQueue();// 将临时队列绑定exchangechannel.queueBind(queue, exchange, WARN);channel.queueBind(queue, exchange, ERROR);// 处理消息channel.basicConsume(queue, true, new DefaultConsumer(channel) {Overridepublic void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {System.out.println(消费者1: new String(body));// TODO 业务处理}});}
}创建消费者2
public class MyConsumer2 {public static void main(String[] args) throws Exception {// 指定交换机String exchange logs_direct;// 创建工厂ConnectionFactory factory new ConnectionFactory();factory.setVirtualHost(/);factory.setHost(xuewei.world);factory.setUsername(xuewei);factory.setPassword(123456);factory.setPort(5672);// 创建连接和通道Connection connection factory.newConnection();Channel channel connection.createChannel();// 绑定交换机channel.exchangeDeclare(exchange, direct);// 创建临时队列String queue channel.queueDeclare().getQueue();// 将临时队列绑定exchangechannel.queueBind(queue, exchange, DEBUG);channel.queueBind(queue, exchange, INFO);// 处理消息channel.basicConsume(queue, true, new DefaultConsumer(channel) {Overridepublic void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {System.out.println(消费者2: new String(body));// TODO 业务处理}});}
}
