RabbitMQ工作模式——Topics模式

1.Topics通配符模式

*是一个单词，#是0到多个单词

Topics模式生产者代码

public class Producer_Topic {
	public static void main(String[] args) throws IOException, TimeoutException {
		//1.创建连接工厂
		ConnectionFactory factory = new ConnectionFactory();
		//2.设置参数
		factory.setHost("172.16.98.133"); ip 默认值 localhost
		factory.setPort(5672);//端口 默认值5672
		factory.setVirtualHost("/itcast");//虚拟机 默认值
		factory.setUsername("heima");//用户名 默认guest
		factory.setPassword("heima");//密码 默认值 guest
		//3.创建连接 Connection
		Connection connection = factory.newConnection();
		//4.创建Channel
		Channel channel = connection.creatChannel();
		/*
		exchange(String exchange,String type,boolean durable,boolean autoDelete,boolean internal,Map 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的队列
			TOPIC("topic")，：通配符方式
			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。一般为false
		6.arguments：参数，一般设为null
		*/
		//5.创建交换机
		String exchangeName = "test_topic";
		channel.exchangeDeclare(exchangeName,BuiltinExchangeType.TOPIC,true,false,false,null);
		//6.创建队列
		String queue1Name = "test_topic_queue1";
		String queue2Name = "test_topic_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设置为空字符串
		*/
		//routingKey 系统的名称.日志的级别。
		//需求：所有error级别的日志存数据库，所有order系统的日志存入数据库
		channel.queueBind(queue1Name,exchangeName,"#.error");
		channel.queueBind(queue1Name,exchangeName,"order.*");
		channel.queueBind(queue2Name,exchangeName,"*.*");
		//8.发送消息
		String body = "日志信息，张三调用了findAll方法...日志级别：info...";
		channel.basicPublish(exchangeName,"order.info",null,body.getBytes());
		//9.释放资源
		channel.close();
		connection.close();
	}
}
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Topic1模式消费者代码

public class Consumer_Topic1 {
	public static void main(String[] args) throws IOException, TimeoutException {
		//1.创建连接工厂
		ConnectionFactory factory = new ConnectionFactory();
		//2.设置参数
		factory.setHost("172.16.98.133"); ip 默认值 localhost
		factory.setPort(5672);//端口 默认值5672
		factory.setVirtualHost("/itcast");//虚拟机 默认值
		factory.setUsername("heima");//用户名 默认guest
		factory.setPassword("heima");//密码 默认值 guest
		//3.创建连接 Connection
		Connection connection = factory.newConnection();
		//4.创建Channel
		Channel channel = connection.creatChannel();
		
		String queue1Name = "test_topic_queue1";
		String queue2Name = "test_topic_queue2";
		
		/*
			basicConsume(String queue,boolean autoAck,Consumer callback)
			参数：
			1.queue：队列名称
			2.autoAck：是否自动确认
			3.callback：回调对象
		*/
		//接收消息
		Consumer consumer = new DefaultConsumer(channel){
			/*
				回调方法，当收到消息后会自动执行该方法
				1.consumerTag：标识
				2.envelope：获取一些信息，交换机，路由key...
				3.properties：配置信息
				4.body：数据
			*/
			@Override
			public void handleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body){
				System.out.println("consumerTag" + consumerTag);
				System.out.println("Exchange" + envelope.getExchange());
				System.out.println("RoutingKey" + envelope.getRoutingKey());
				System.out.println("properties" + properties);
				System.out.println("body" + new String(body));
				System.out.println("将日志信息存入数据库......");
			}
		};
		channel.basicConsume("queue1Name",true,consumer);

		//消费者不能关闭资源
	}
}

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Topic2模式消费者代码

public class Consumer_Topic2 {
	public static void main(String[] args) throws IOException, TimeoutException {
		//1.创建连接工厂
		ConnectionFactory factory = new ConnectionFactory();
		//2.设置参数
		factory.setHost("172.16.98.133"); ip 默认值 localhost
		factory.setPort(5672);//端口 默认值5672
		factory.setVirtualHost("/itcast");//虚拟机 默认值
		factory.setUsername("heima");//用户名 默认guest
		factory.setPassword("heima");//密码 默认值 guest
		//3.创建连接 Connection
		Connection connection = factory.newConnection();
		//4.创建Channel
		Channel channel = connection.creatChannel();
		
		String queue1Name = "test_topic_queue1";
		String queue2Name = "test_topic_queue2";
		
		/*
			basicConsume(String queue,boolean autoAck,Consumer callback)
			参数：
			1.queue：队列名称
			2.autoAck：是否自动确认
			3.callback：回调对象
		*/
		//接收消息
		Consumer consumer = new DefaultConsumer(channel){
			/*
				回调方法，当收到消息后会自动执行该方法
				1.consumerTag：标识
				2.envelope：获取一些信息，交换机，路由key...
				3.properties：配置信息
				4.body：数据
			*/
			@Override
			public void handleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body){
				System.out.println("consumerTag" + consumerTag);
				System.out.println("Exchange" + envelope.getExchange());
				System.out.println("RoutingKey" + envelope.getRoutingKey());
				System.out.println("properties" + properties);
				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);

		//消费者不能关闭资源
	}
}

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