33 lines
1.0 KiB
Markdown
33 lines
1.0 KiB
Markdown
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---
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layout: pattern
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title: Leader/Followers
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folder: leader-followers
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permalink: /patterns/leader-followers/
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categories: Concurrency
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tags:
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- Performance
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---
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## Intent
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The Leader/Followers pattern provides a concurrency model where multiple
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threads can efficiently de-multiplex events and dispatch event handlers
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that process I/O handles shared by the threads.
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## Class diagram
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## Applicability
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Use Leader-Followers pattern when
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* multiple threads take turns sharing a set of event sources in order to detect, de-multiplex, dispatch and process service requests that occur on the event sources.
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## Real world examples
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* [ACE Thread Pool Reactor framework](https://www.dre.vanderbilt.edu/~schmidt/PDF/HPL.pdf)
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* [JAWS](http://www.dre.vanderbilt.edu/~schmidt/PDF/PDCP.pdf)
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* [Real-time CORBA](http://www.dre.vanderbilt.edu/~schmidt/PDF/RTS.pdf)
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## Credits
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* [Douglas C. Schmidt and Carlos O’Ryan - Leader/Followers](http://www.kircher-schwanninger.de/michael/publications/lf.pdf)
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