Topic匹配模式

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topic类型的交换器允许在RabbitMQ中使用模糊匹配来绑定自己感兴趣的信息:

*（星号）表示一个单词
#（井号）表示零个或者多个单词

RoutingKey为“black.critical.high”的日志会投递到queue1和queue2,。
RoutingKey为“red.critical.high”的日志会只投递到queue2。
RoutingKey为“white.critical.high”的日志会投递到queue2，并且虽然queue2的两个匹配规则都符合但只会向queue2投递一份。

public class Producer {        private static final String EXCHANGE_NAME = "topic_logs";        public static void main(String[] argv) {            Connection connection = null;            Channel channel = null;            try {                ConnectionFactory factory = new ConnectionFactory();                factory.setHost("localhost");                connection = factory.newConnection();                channel = connection.createChannel();//声明一个匹配模式的交换器                channel.exchangeDeclare(EXCHANGE_NAME, "topic");                // 待发送的消息                String[] routingKeys = new String[]{"black.critical.high",                        "red.critical.high",                        "white.critical.high",                        };//发送消息                for(String severity :routingKeys){                    String message = "From "+severity+" routingKey' s message!";                    channel.basicPublish(EXCHANGE_NAME, severity, null, message.getBytes());                    System.out.println("TopicSend [x] Sent '" + severity + "':'" + message + "'");                }            } catch (Exception e) {                e.printStackTrace();            } finally {                if (connection != null) {                    try {                        connection.close();                    } catch (Exception ignore) {                    }                }            }        }}

public class Consumer01 {    private static final String EXCHANGE_NAME = "topic_logs";    public static void main(String[] argv) throws Exception {        ConnectionFactory factory = new ConnectionFactory();        factory.setHost("localhost");        Connection connection = factory.newConnection();        Channel channel = connection.createChannel();//声明一个匹配模式的交换器        channel.exchangeDeclare(EXCHANGE_NAME, "topic");        String queueName = channel.queueDeclare().getQueue();        // 路由关键字        String[] routingKeys = new String[]{"#.high", "white.critical.*"};//绑定路由关键字        for (String bindingKey : routingKeys) {            channel.queueBind(queueName, EXCHANGE_NAME, bindingKey);            System.out.println("ReceiveLogsTopic2 exchange:"+EXCHANGE_NAME+", queue:"+queueName+", BindRoutingKey:" + bindingKey);        }        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("ReceiveLogsTopic2 [x] Received '" + envelope.getRoutingKey() + "':'" + message + "'");            }        };        channel.basicConsume(queueName, true, consumer);    }}

public class Consumer02 {    private static final String EXCHANGE_NAME = "topic_logs";    public static void main(String[] argv) throws Exception {        ConnectionFactory factory = new ConnectionFactory();        factory.setHost("localhost");        Connection connection = factory.newConnection();        Channel channel = connection.createChannel();//声明一个匹配模式的交换器        channel.exchangeDeclare(EXCHANGE_NAME, "topic");        String queueName = channel.queueDeclare().getQueue();        // 路由关键字        String[] routingKeys = new String[]{"black.critical.high"};//绑定路由关键字        for (String bindingKey : routingKeys) {            channel.queueBind(queueName, EXCHANGE_NAME, bindingKey);            System.out.println("ReceiveLogsTopic1 exchange:"+EXCHANGE_NAME+", queue:"+queueName+", BindRoutingKey:" + bindingKey);        }        System.out.println("ReceiveLogsTopic1 [*] 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("ReceiveLogsTopic1 [x] Received '" + envelope.getRoutingKey() + "':'" + message + "'");            }        };        channel.basicConsume(queueName, true, consumer);    }}

参考文章:

http://blog.csdn.net/Super_RD/article/details/70850453

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