Scheduler pattern

In computer programming, the scheduler pattern is a software design pattern. It is a concurrency pattern used to explicitly control when threads may execute single-threaded code.

The scheduler pattern uses an object that explicitly sequences waiting threads. It provides a mechanism to implement a scheduling policy. It is independent of any specific scheduling policy; the policy is encapsulated in its own class, and is reusable.

The scheduler patter adds significant overhead beyond that required to call a synchronized method.

The read/write lock pattern is usually implemented using the scheduler patter to ensure fairness in scheduling.

The scheduler patter is not quite the same as the scheduled-task pattern).

See also