Asynchronous Completion Token - Ingeniørhøjskolen i Århus

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$Course Material\Efficiently Coding Communication Protocols in C++ ...$

Problem • A client application invokes one or more services asynchronously • Each service returns its response via a completion event • The client application must demultiplex this event to the appropriate handler (as fast as possible) © Ingeniørhøjskolen i Århus Slide 4
Solution • Together with each asynchronous operation invocation: – transmit information that identifies how the initiator should process the service’s response • create an Asynchronous Completion Token (ACT) • the ACT is passed to the service, which hold it – but does not modify it • Return this information to the initiator when the operation finishes • The initiator uses the ACT to identify the completion handler © Ingeniørhøjskolen i Århus Slide 5
Page 1 and 2: Distributed Real-Time Systems (TI-D
Page 3: Context • An event-driven system
Page 7 and 8: Sequence Diagram :Initiator :Comple
Page 9 and 10: 1. Define the ACT Representation
Page 11 and 12: 6. Determine the initiator demultip
Page 13 and 14: 6.1 Async_Stream_Read_Result (ACT)
Page 15 and 16: Management Example (1) 2 Window 2 L
Page 17 and 18: Management Example (3) class Manage
Page 19 and 20: Management Example (5) int main() {
Page 21 and 22: ACT Liabilities • Memory leaks -
Page 23: Relation to other POSA2 Patterns ©

Asynchronous Completion Token - Ingeniørhøjskolen i Århus

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