org.spf4j.concurrent

Class LocalSemaphore

java.lang.Object

org.spf4j.concurrent.LocalSemaphore

All Implemented Interfaces:

PermitSupplier, Semaphore

public final class LocalSemaphore
extends Object
implements Semaphore

A process level semaphore implementation based on the JDK semaphore.

Author:

zoly

Constructor Summary

Constructors

Constructor and Description
LocalSemaphore(int nrPermits, boolean fair)

Method Summary

Modifier and Type	Method and Description
void	release(int nrPermits) release a number of permits.
String	toString()
boolean	tryAcquire(int nrPermits, long deadlineNanos)
boolean	tryAcquire(int nrPermits, long timeout, TimeUnit unit) try to acquire a number of permits.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.spf4j.concurrent.Semaphore

release, toSemaphore

Methods inherited from interface org.spf4j.concurrent.PermitSupplier

acquire, acquire, tryAcquire

Constructor Detail

LocalSemaphore

public LocalSemaphore(int nrPermits,
                      boolean fair)

Method Detail

tryAcquire

public boolean tryAcquire(int nrPermits,
                          long deadlineNanos)
                   throws InterruptedException

Specified by:

tryAcquire in interface PermitSupplier

Throws:

InterruptedException

tryAcquire

public boolean tryAcquire(int nrPermits,
                          long timeout,
                          TimeUnit unit)
                   throws InterruptedException

Description copied from interface: PermitSupplier

try to acquire a number of permits.

Specified by:

tryAcquire in interface PermitSupplier

Parameters:

nrPermits - number of permits to acquire.

timeout - time to wait for permits to become available.

unit - units of time.

Returns:

true if permits acquired, false if timed out.

Throws:

InterruptedException - - operation interrupted.

release

public void release(int nrPermits)

Description copied from interface: Semaphore

release a number of permits.

Specified by:

release in interface Semaphore

Parameters:

nrPermits - the number of permits to release.

toString

public String toString()

Overrides:

toString in class Object