Half-Sync/Half-Async: An Architectural Pattern for Efficient and Well-Structured Concurrent I/O

By: D.C. Schmidt, C.D. Cranor

Summary: Integrates synchronous and asynchronous I/O models in concurrent programming.

Url: http://www.cs.wustl.edu/~schmidt/patterns-ace.html

Pattern: Half-Sync/Half-Async

Integrates synchronous and asynchronous I/O models in concurrent programming.

• The synchronous layer uses Active Object
• The asynchronous layer may use Reactor to demultiplex events from multiple sources.
• The queuing layer acts as a Facade [Gamma+95] that simplifies the interface to the asynchronous layer.
• The queuing layer acts as a Mediator [Gamma+95] that coordinates the exchange of data between the asynchronous and synchronous layers.