Package org.opendaylight.openflowplugin.applications.frsync.util

Class SemaphoreKeeperGuavaImpl<K>

java.lang.Object

org.opendaylight.openflowplugin.applications.frsync.util.SemaphoreKeeperGuavaImpl<K>

All Implemented Interfaces:

SemaphoreKeeper<K>

public class SemaphoreKeeperGuavaImpl<K>
extends Object
implements SemaphoreKeeper<K>

Constructor Summary

Constructors

Constructor	Description
SemaphoreKeeperGuavaImpl(int permits, boolean fair)

Method Summary

Modifier and Type	Method	Description
void	releaseGuard(@Nullable Semaphore guard)	Unlock and release guard.
Semaphore	summonGuard(@NonNull K key)	Create or load semaphore for key from cache.
Semaphore	summonGuardAndAcquire(@NonNull K key)	Get guard and lock for key.

Methods inherited from class java.lang.Object

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

Constructor Detail

SemaphoreKeeperGuavaImpl

public SemaphoreKeeperGuavaImpl(int permits,
                                boolean fair)

Method Detail

summonGuard

public Semaphore summonGuard(@NonNull K key)

Description copied from interface: SemaphoreKeeper

Create or load semaphore for key from cache.

Specified by:

summonGuard in interface SemaphoreKeeper<K>

Parameters:

key - semaphore identifier

Returns:

new or existing semaphore for given key, for one key there is always only one semaphore available

summonGuardAndAcquire

public Semaphore summonGuardAndAcquire(@NonNull K key)

Description copied from interface: SemaphoreKeeper

Get guard and lock for key.

Specified by:

summonGuardAndAcquire in interface SemaphoreKeeper<K>

Parameters:

key - for which guard should be created and acquired

Returns:

semaphore guard

releaseGuard

public void releaseGuard(@Nullable Semaphore guard)

Description copied from interface: SemaphoreKeeper

Unlock and release guard.

Specified by:

releaseGuard in interface SemaphoreKeeper<K>

Parameters:

guard - semaphore guard which should be released