(转)RabbitMQ学习之Headers交换类型(java)
http://blog.csdn.net/zhu_tianwei/article/details/40923131
Headers类型的exchange使用的比较少,它也是忽略routingKey的一种路由方式。是使用Headers来匹配的。Headers是一个键值对,可以定义成Hashtable。发送者在发送的时候定义一些键值对,接收者也可以再绑定时候传入一些键值对,两者匹配的话,则对应的队列就可以收到消息。匹配有两种方式all和any。这两种方式是在接收端必须要用键值"x-mactch"来定义。all代表定义的多个键值对都要满足,而any则代码只要满足一个就可以了。fanout,direct,topic exchange的routingKey都需要要字符串形式的,而headers exchange则没有这个要求,因为键值对的值可以是任何类型。
1.生产者Producer.Java
- package cn.slimsmart.rabbitmq.demo.headers;
- import java.util.Date;
- import java.util.Hashtable;
- import java.util.Map;
- import org.springframework.amqp.core.ExchangeTypes;
- import com.rabbitmq.client.AMQP;
- import com.rabbitmq.client.AMQP.BasicProperties;
- import com.rabbitmq.client.AMQP.BasicProperties.Builder;
- import com.rabbitmq.client.Channel;
- import com.rabbitmq.client.Connection;
- import com.rabbitmq.client.ConnectionFactory;
- public class Producer {
- private final static String EXCHANGE_NAME = "header-exchange";
- @SuppressWarnings("deprecation")
- public static void main(String[] args) throws Exception {
- // 创建连接和频道
- ConnectionFactory factory = new ConnectionFactory();
- factory.setHost("192.168.36.102");
- // 指定用户 密码
- factory.setUsername("admin");
- factory.setPassword("admin");
- // 指定端口
- factory.setPort(AMQP.PROTOCOL.PORT);
- Connection connection = factory.newConnection();
- Channel channel = connection.createChannel();
- //声明转发器和类型headers
- channel.exchangeDeclare(EXCHANGE_NAME, ExchangeTypes.HEADERS,false,true,null);
- String message = new Date().toLocaleString() + " : log something";
- Map<String,Object> headers = new Hashtable<String, Object>();
- headers.put("aaa", "01234");
- Builder properties = new BasicProperties.Builder();
- properties.headers(headers);
- // 指定消息发送到的转发器,绑定键值对headers键值对
- channel.basicPublish(EXCHANGE_NAME, "",properties.build(),message.getBytes());
- System.out.println("Sent message :'" + message + "'");
- channel.close();
- connection.close();
- }
- }
2.消费者Consumer.java
- package cn.slimsmart.rabbitmq.demo.headers;
- import java.util.Hashtable;
- import java.util.Map;
- import org.springframework.amqp.core.ExchangeTypes;
- import com.rabbitmq.client.AMQP;
- import com.rabbitmq.client.Channel;
- import com.rabbitmq.client.Connection;
- import com.rabbitmq.client.ConnectionFactory;
- import com.rabbitmq.client.QueueingConsumer;
- public class Consumer {
- private final static String EXCHANGE_NAME = "header-exchange";
- private final static String QUEUE_NAME = "header-queue";
- public static void main(String[] args) throws Exception {
- // 创建连接和频道
- ConnectionFactory factory = new ConnectionFactory();
- factory.setHost("192.168.36.102");
- // 指定用户 密码
- factory.setUsername("admin");
- factory.setPassword("admin");
- // 指定端口
- factory.setPort(AMQP.PROTOCOL.PORT);
- Connection connection = factory.newConnection();
- Channel channel = connection.createChannel();
- //声明转发器和类型headers
- channel.exchangeDeclare(EXCHANGE_NAME, ExchangeTypes.HEADERS,false,true,null);
- channel.queueDeclare(QUEUE_NAME,false, false, true,null);
- Map<String, Object> headers = new Hashtable<String, Object>();
- headers.put("x-match", "any");//all any
- headers.put("aaa", "01234");
- headers.put("bbb", "56789");
- // 为转发器指定队列,设置binding 绑定header键值对
- channel.queueBind(QUEUE_NAME, EXCHANGE_NAME,"", headers);
- QueueingConsumer consumer = new QueueingConsumer(channel);
- // 指定接收者,第二个参数为自动应答,无需手动应答
- channel.basicConsume(QUEUE_NAME, true, consumer);
- while (true) {
- QueueingConsumer.Delivery delivery = consumer.nextDelivery();
- String message = new String(delivery.getBody());
- System.out.println(message);
- }
- }
- }