Subscriber that acts as publisher

i have a service application configured as subscriber.

In particular circumstances the application have to send a message after it have received someting from a publisher.

The best configuration for 开发者_运维知识库me is to have the application, a service, that have two classes that act like subscribers, one for message1 and the second for message2. When message1 is received, subscriber1 publish message2, and than subscriber2 received message2 and handle it.

Can someone show me how to configure the service application to do that ?

Thanks in advance.