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From "Oliver Heger (JIRA)" <>
Subject [jira] Resolved: (LANG-560) New TimedSemaphore class
Date Sun, 03 Jan 2010 19:05:54 GMT


Oliver Heger resolved LANG-560.

    Resolution: Fixed

Committed in revision 895466.

> New TimedSemaphore class
> ------------------------
>                 Key: LANG-560
>                 URL:
>             Project: Commons Lang
>          Issue Type: New Feature
>          Components: lang.concurrent.*
>            Reporter: Oliver Heger
>             Fix For: 3.0
>         Attachments: TimedSemaphore.patch
> {{TimedSemaphore}} is a specialized Semaphore implementation that also has a timing component:
In a configurable time period a given number of permits is available. Threads call the semaphore's
{{acquire()}} method to request a permit. When no more permits are available {{acquire()}}
blocks the calling thread. At the end of the time period the permits are restored, and all
blocking threads are waked up.
> The main use case for this class is to provide a convenient means for controlling the
load produced by a process. When used correctly, {{TimedSemaphore}} ensures that only a given
number of steps (e.g. database queries, file operations, or computations) are performed in
a specific time period. This may be useful for many applications.
> More information including a usage example can be found in the Javadocs of the class.
Comments or suggestions for improvements are appreciated.

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