Figure 48 : Subscribe/Notify-pattern for two clients.Publish/Subscribe
The Publish/Subscribe-pattern (see Figure 49 and Figure 50 ) allows a loose
coupling between communication partners. There are services offering
information and advertise those offers on a broker component. When clients
declare their interest in certain information on the broker the component will
make sure the information flow between service and client will be established.
Figure 49 Publish/Subscribe-pattern