RABBITMQ Five Message Queuing Learning (vi)-wildcard mode (route type: Topic)

RABBITMQ Five Message Queuing Learning (vi) – Wildcard mode (route type: Topic)

tags (space delimited): RabbitMQ

As the upgrade of a schema described in the previous article, if you need to listen to all the messages for a switch, you can bind them in the form of Message Queuing. Queue structure Diagram

Pattern matching through string wildcard for Message Queuing that needs to be distributed
Message path:

Realize:
1. Producers

Private final static String Exchange_name = "Test_exchange_topic";

    public static void Main (string[] argv) throws Exception {
        //Get to Connection and MQ channel
        Connection Connection = connectionutil.g Etconnection ();
        Channel channel = Connection.createchannel ();

        DECLARE EXCHANGE
        channel.exchangedeclare (exchange_name, "topic");

        Message content,
        String message = "Delete Product ID = +";
        Channel.basicpublish (Exchange_name, "Item.delete", NULL, Message.getbytes ());
        System.out.println ("[X] Sent '" + Message + "'");

        Channel.close ();
        Connection.close ();
    }

2. Consumer 1

 Private final static String queue_name = "Test_queue_topic_1";

    Private final static String Exchange_name = "Test_exchange_topic"; public static void Main (string[] argv) throws Exception {//Get to Connection and MQ channel Connection Connection = Connecti
        Onutil.getconnection ();

        Channel channel = Connection.createchannel ();

        Declaration Queue Channel.queuedeclare (Queue_name, False, False, false, NULL);
        Bind queue to switch Channel.queuebind (queue_name, Exchange_name, "item.update");

        Channel.queuebind (queue_name, Exchange_name, "Item.delete");

        At the same time the server will only send a message to the consumer Channel.basicqos (1);
        Define the queue's consumer queueingconsumer consumer = new Queueingconsumer (channel);

        Listen queue, manually return complete Channel.basicconsume (Queue_name, false, consumer);
            Gets the message while (true) {Queueingconsumer.delivery Delivery = Consumer.nextdelivery ();
         String message = new String (Delivery.getbody ());   System.out.println ("[X] Received '" + Message + "'");

            Thread.Sleep (10);
        Channel.basicack (Delivery.getenvelope (). Getdeliverytag (), false); }
    }

3, Consumer 2

 Private final static String queue_name = "test_queue_topic_2";

    Private final static String Exchange_name = "Test_exchange_topic"; public static void Main (string[] argv) throws Exception {//Get to Connection and MQ channel Connection Connection = Connecti
        Onutil.getconnection ();

        Channel channel = Connection.createchannel ();

        Declaration Queue Channel.queuedeclare (Queue_name, False, False, false, NULL);

        Bind queue to switch Channel.queuebind (queue_name, Exchange_name, "item.#");

        At the same time the server will only send a message to the consumer Channel.basicqos (1);
        Define the queue's consumer queueingconsumer consumer = new Queueingconsumer (channel);

        Listen queue, manually return complete Channel.basicconsume (Queue_name, false, consumer);
            Gets the message while (true) {Queueingconsumer.delivery Delivery = Consumer.nextdelivery ();
            String message = new String (Delivery.getbody ());
            System.out.println ("[X] Received '" + Message + "'"); ThreAd.sleep (10);
        Channel.basicack (Delivery.getenvelope (). Getdeliverytag (), false); }
    }

4. Test results
In consumer 1, it is clear what routing Key the queue needs to bind to the router

Bind queue to switch
        channel.queuebind (queue_name, Exchange_name, "item.update");
        Channel.queuebind (queue_name, Exchange_name, "Item.delete");

Consumer 2, because to receive all messages under item, the binding is:

Bind queue to switch
        channel.queuebind (queue_name, Exchange_name, "item.#");

All Consumers 2 can receive all messages, consumers 1 can only accept update\delete two kinds of messages