layout	title	folder	permalink	categories	tags
pattern	Leader/Followers	leader-followers	/patterns/leader-followers/	Concurrency	Performance

Intent

The Leader/Followers pattern provides a concurrency model where multiple threads can efficiently de-multiplex events and dispatch event handlers that process I/O handles shared by the threads.

Class diagram

Applicability

Use Leader-Followers pattern when

• 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.

Real world examples

• ACE Thread Pool Reactor framework
• JAWS
• Real-time CORBA

Credits

• Douglas C. Schmidt and Carlos O’Ryan - Leader/Followers