RABBITMQ direct/fanout/topic Three types of Exchange Java code comparison

Producer End

1. Creation of Channel

No matter what kind of exchange is used, creating the channel code is the same, as follows

1 New connectionfactory (); 2 factory.sethost ("localhost"); 3 Connection Connection = factory.newconnection (); 4 Channel channel = Connection.createchannel ();

2. Exchange creation

2.1 Direct

Direct uses the default Exchange, does not need to be declared, and requires a specified message to be sent to that queue

false false false null);

2.2 Fanout

Channel.exchangedeclare (Exchange_name, "fanout")

2.3 Topic as follows

Channel.exchangedeclare (exchange_name, "topic");

3. Sending of messages

3.1 Direct

null, Message.getbytes ());

3.2 fanout

null, Message.getbytes ());

3.3 topic

null, Message.getbytes ());

Cusumer End

1. Create Channel

New connectionfactory (); Factory.sethost ("localhost"== Connection.createchannel ();

2, the preparation before the message

2.1 Direct binding queue for message consumption

false false false null);

2.2 fanout, you need to first specify the exchange type Fanout

Channel.exchangedeclare (Exchange_name, "fanout"="");

2.3 topic

Channel.exchangedeclare (exchange_name, "topic"=for(String bindingkey:argv) {      Channel.queuebind (QueueName, Exchange_name, Bindingkey);}

3, the specific consumption message code is the same

Queueingconsumer consumer =NewQueueingconsumer (channel); Channel.basicconsume (Queue_name,true, consumer); while(true) {queueingconsumer.delivery Delivery=Consumer.nextdelivery (); Envelope ELP=Delivery.getenvelope (); String message=NewString (Delivery.getbody ()); System.out.println ("[x] Received '" + Message + "'"); Channel.basicack (Elp.getdeliverytag (),false); //Channel.basicnack ();?}

RABBITMQ direct/fanout/topic Three types of Exchange Java code comparison