rabbitMQ学习（四）

按照routing key接收信息

发送端：

public class EmitLogDirect {

    private static final String EXCHANGE_NAME = "direct_logs";

    public static void main(String[] argv)
                  throws java.io.IOException {

        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        channel.exchangeDeclare(EXCHANGE_NAME, "direct");

        String severity = getSeverity(argv);
        String message = getMessage(argv);

        channel.basicPublish(EXCHANGE_NAME, severity, null, message.getBytes());
        System.out.println(" [x] Sent '" + severity + "':'" + message + "'");

        channel.close();
        connection.close();
    }
    //..
}

　　接收端：

import com.rabbitmq.client.*;

import java.io.IOException;

public class ReceiveLogsDirect {

  private static final String EXCHANGE_NAME = "direct_logs";

  public static void main(String[] argv) throws Exception {
    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("localhost");
    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();

    channel.exchangeDeclare(EXCHANGE_NAME, "direct");
    String queueName = channel.queueDeclare().getQueue();

    if (argv.length < 1){
      System.err.println("Usage: ReceiveLogsDirect [info] [warning] [error]");
      System.exit(1);
    }

    for(String severity : argv){
      channel.queueBind(queueName, EXCHANGE_NAME, severity);
    }
    System.out.println(" [*] Waiting for messages. To exit press CTRL+C");

    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 '" + envelope.getRoutingKey() + "':'" + message + "'");
      }
    };
    channel.basicConsume(queueName, true, consumer);
  }
}