Programming Model and Protocols for Reconfigurable Distributed ...

26 CHAPTER 2. COMPONENT MODEL
Figure 2.6. When MyNetwork triggers a MessageA on its provided Network port,
this event is forwarded by both channel 1 and channel 2 to the required Network ports
of Component1 and Component2, respectively.
Figure 2.7. When MyNetwork triggers a MessageA event on its provided Network
port, this event is forwarded only by channel 1 to the required Network port of
Component1. MessageB events triggered by MyNetwork on its Network port, are
forwarded only by channel 2 to the Network port of Component2.
Network port, this event is delivered to MyComponent where it is handled
by handler 2 . An event triggered (published) on a port is forwarded to other
components by all channels connected to the other side of the port as in Figure
2.6. As an optimization, the run-time system should not forward events
on channels that would not lead to any compatible subscribed handlers. An
event received on a port is handled by all compatible handlers subscribed
to that port as in Figure 2.9. Here, whenever MyNetwork triggers a MessageA
event on its Network port, this event is delivered to MyComponent where it
is handled sequentially by both handler 1 and handler 2 , in the same order in
which these two handlers were subscribed to the Network port.