Publish/Subscribe发布与订阅模式
- 需要设置类型为fanout的交换机,并且交换机和队列进行绑定,当发送消息到交换机后,交换机会将消息发送到绑定的队列
- 广播交换机-生产者代码
public class Producer {
public static void main(String[] args) throws Exception {
Connection connection = ConnectionUtil.getConnection();
Channel channel = connection.createChannel();
/*
exchangeDeclare(String exchange, BuiltinExchangeType type, boolean durable, boolean autoDelete, boolean internal, Map<String, Object> arguments)
参数:
1. exchange:交换机名称
2. type:交换机类型
DIRECT("direct"),:定向
FANOUT("fanout"),:扇形(广播),发送消息到每一个与之绑定队列。
TOPIC("topic"),通配符的方式
HEADERS("headers");参数匹配
3. durable:是否持久化
4. autoDelete:自动删除
5. internal:内部使用。 一般false
6. arguments:参数
*/
String exchangeName = "test_fanout";
//5. 创建交换机
channel.exchangeDeclare(exchangeName, BuiltinExchangeType.FANOUT,true,false,false,null);
//6. 创建队列
String queue1Name = "test_fanout_queue1";
String queue2Name = "test_fanout_queue2";
channel.queueDeclare(queue1Name,true,false,false,null);
channel.queueDeclare(queue2Name,true,false,false,null);
//7. 绑定队列和交换机
/*
queueBind(String queue, String exchange, String routingKey)
参数:
1. queue:队列名称
2. exchange:交换机名称
3. routingKey:路由键,绑定规则
如果交换机的类型为fanout ,routingKey设置为""
*/
channel.queueBind(queue1Name,exchangeName,"");
channel.queueBind(queue2Name,exchangeName,"");
String body = "日志信息:张三调用了findAll方法...日志级别:info...";
//8. 发送消息
channel.basicPublish(exchangeName,"",null,body.getBytes());
//9. 释放资源
channel.close();
connection.close();
}
}
public class Consumer1 {
public static void main(String[] args) throws Exception {
Connection connection = ConnectionUtil.getConnection();
Channel channel = connection.createChannel();
String queue1Name = "test_fanout_queue1";
Consumer consumer = new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
System.out.println("body:"+new String(body));
System.out.println("将日志信息打印到控制台.....");
}
};
channel.basicConsume(queue1Name,true,consumer);
}
}
public class Consumer2 {
public static void main(String[] args) throws Exception {
Connection connection = ConnectionUtil.getConnection();
Channel channel = connection.createChannel();
String queue2Name = "test_fanout_queue2";
Consumer consumer = new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
System.out.println("body:"+new String(body));
System.out.println("将日志信息打印到控制台.....");
}
};
channel.basicConsume(queue2Name,true,consumer);
}
}