Publish / subscribe: subscribe model release
issued subscription model:
1, every consumer monitor its own queue.
2, the message to the producer Broker, the switch forwards the message to each queue bind this switch, each switch binding queues will receive
the message
among a plurality of switches
a message producer to a first switch , the switch sends a message to each queue. Each queue has a different consumer listening
implements a news release more consumers can receive this news
if the following queue to get rid of. So part of the red circle and mode of operation is the same. Although there is no work confront switch will have a default switch.
So Posted subscription feature work queue can be achieved. But it is more powerful than the work queue, it can implement multiple consumers at the same time to accept the same message
have a test
Case:
user notification when a user recharge or transfer successfully complete the system informs the user that there are many ways to inform the way text messaging, e-mail.
Represent the two message queues sms and email messages is
defined a new producer
to copy the original code to a new class of logic which
has a switch and two queues
in the queue when the statement, two statements queues
Switch statement
Ctrl + T to find the class that implements
this method is that the parameters of
the replacement machine has a lot of constant type
of several types
Switch queues and establish a binding
There are a lot of overloads
binding text message queue.
Send a message
5 each message is sent
the first parameter is a switch. The second parameter is set to null routing key,
