java-design-patterns

History

Anurag Agarwal 390795154f Resolves checkstyle issues for semaphore servant serverless service-layer service-locator (#1079 )

* Reduces checkstyle errors in semaphore

* Reduces checkstyle errors in servant

* Reduces checkstyle errors in serverless

* Reduces checkstyle errors in service-layer

* Reduces checkstyle errors in service-locator

2019-11-11 22:27:43 +02:00

etc

#190 Remove urm plugin

2017-11-28 20:55:52 +02:00

src

Resolves checkstyle issues for semaphore servant serverless service-layer service-locator (#1079 )

2019-11-11 22:27:43 +02:00

pom.xml

Update license headers

2019-10-12 20:05:54 +03:00

README.md

#190 Remove pumlids from readmes

2017-11-28 21:28:53 +02:00

README.md

layout, title, folder, permalink, categories, tags

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Also known as

Counting Semaphore

Intent

Create a lock which mediates access to a pool of resources. Only a limited number of threads, specified at the creation of the semaphore, can access the resources at any given time. A semaphore which only allows one concurrent access to a resource is called a binary semaphore.

Applicability

Use a Semaphore when

you have a pool of resources to allocate to different threads
concurrent access to a resource could lead to a race condition

Credits

[Semaphore(programming)] (http://en.wikipedia.org/wiki/Semaphore_(programming))
[Semaphores] (http://tutorials.jenkov.com/java-concurrency/semaphores.html)