|
Define an event ADataReadyEvent with A as source and B as combined sink and listener
|
|
A defines an instance Evtcontrol of ADataReadyEvent which has a method transferdata
|
|
B instantiates an object Bcallback implementing interface ADataReadyListener with a method readytogo()
|
|
B registers this listener object as a callback with A
|
|
When A is ready to send data to B, A callbacks Bcallback.readtogo(ADataReadyEvent Evtcontrol)
|
|
B calls back Evtcontrol.transferdata(sink information)
|
|
Note that "control" mechanism uses powerful JavaBean approach (this is handshake) whereas one can use a totally different and faster approach to actually send data
|
|
Traditional (in my world) mechanisms combine control and data transfer
|
