| 1 |
Define an event ADataReadyEvent with A as source and B as combined sink and listener
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| 2 |
A defines an instance Evtcontrol of ADataReadyEvent which has a method transferdata
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| 3 |
B instantiates an object Bcallback implementing interface ADataReadyListener with a method readytogo()
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| 4 |
B registers this listener object as a callback with A
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| 5 |
When A is ready to send data to B, A callbacks Bcallback.readtogo(ADataReadyEvent Evtcontrol)
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| 6 |
B calls back Evtcontrol.transferdata(sink information)
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| 7 |
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
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| 8 |
Traditional (in my world) mechanisms combine control and data transfer
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