Active object: Difference between revisions
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{{About|a multi-threading technique|the [[lockstep protocol]] variant|Active objects}} |
{{About|a multi-threading technique|the [[lockstep protocol]] variant|Active objects}} |
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The '''active object''' [[design pattern]] decouples method execution from method invocation that reside in their own [[thread (computing)|thread]] of control.<ref>{{cite book |
The '''active object''' [[design pattern]] decouples method execution from method invocation for objects that each reside in their own [[thread (computing)|thread]] of control.<ref>{{cite book |
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| author = [[Douglas C. Schmidt]] |
| author = [[Douglas C. Schmidt]] |
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| coauthors = Michael Stal, Hans Rohnert, and Frank Buschmann |
| coauthors = Michael Stal, Hans Rohnert, and Frank Buschmann |
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Revision as of 15:33, 19 September 2012
The active object design pattern decouples method execution from method invocation for objects that each reside in their own thread of control.[1] The goal is to introduce concurrency, by using asynchronous method invocation and a scheduler for handling requests.[2]
The pattern consists of six elements:[3]
- A proxy, which provides an interface towards clients with publicly accessible methods.
- An interface which defines the method request on an active object.
- A list of pending requests from clients.
- A scheduler, which decides which request to execute next.
- The implementation of the active object method.
- A callback or variable for the client to receive the result.
See also
References
- ^ Douglas C. Schmidt (2000). Pattern-Oriented Software Architecture, Volume 2: Patterns for Concurrent and Networked Objects. John Wiley & Sons. ISBN 0-471-60695-2.
{{cite book}}: Unknown parameter|coauthors=ignored (|author=suggested) (help) - ^ Bass, L., Clements, P., Kazman, R. Software Architecture in Practice. Addison Wesley, 2003
- ^ Lavender, R. Greg. "Active Object" (PDF). Retrieved 2007-02-02.
{{cite web}}: Unknown parameter|coauthors=ignored (|author=suggested) (help)
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