com.alipay.sofa.jraft.util.concurrent

类 AdjustableSemaphore

java.lang.Object

com.alipay.sofa.jraft.util.concurrent.AdjustableSemaphore

所有已实现的接口:

Serializable

public final class AdjustableSemaphore
extends Object
implements Serializable

An implementation of adjustable semaphore. Written by Marshall Pierce and released to the public domain See: http://blog.teamlazerbeez.com/2009/04/20/javas-semaphore-resizing/

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
AdjustableSemaphore()
AdjustableSemaphore(int maxPermits)

方法概要

限定符和类型	方法和说明
void	acquire() Acquires a permit from this semaphore, blocking until one is available, or the thread is interrupted.
int	availablePermits() Returns the current number of permits available in this semaphore.
int	getMaxPermits()
boolean	isAvailable() Returns if the permits is available of the semaphore.
void	release() Releases a permit, returning it to the semaphore.
void	setMaxPermits(int newMaxPermits) Adjusts the maximum number of available permits.
boolean	tryAcquire() Acquires a permit from this semaphore, only if one is available at the time of invocation.

从类继承的方法 java.lang.Object

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

构造器详细资料

AdjustableSemaphore

public AdjustableSemaphore()

AdjustableSemaphore

public AdjustableSemaphore(int maxPermits)

方法详细资料

getMaxPermits

public int getMaxPermits()

setMaxPermits

public void setMaxPermits(int newMaxPermits)

Adjusts the maximum number of available permits.

参数:

newMaxPermits - max number of permits

release

public void release()

Releases a permit, returning it to the semaphore.

acquire

public void acquire()
             throws InterruptedException

Acquires a permit from this semaphore, blocking until one is available, or the thread is interrupted.

抛出:

InterruptedException - if the current thread is interrupted

tryAcquire

public boolean tryAcquire()

Acquires a permit from this semaphore, only if one is available at the time of invocation.

返回:

true if a permit was acquired and false otherwise

availablePermits

public int availablePermits()

Returns the current number of permits available in this semaphore.

返回:

the number of permits available in this semaphore

isAvailable

public boolean isAvailable()

Returns if the permits is available of the semaphore.

返回:

true if current number of permits > 0