alluxio.concurrent

Class ClientRWLock

java.lang.Object

alluxio.concurrent.ClientRWLock

All Implemented Interfaces:

ReadWriteLock

@ThreadSafe
public final class ClientRWLock
extends Object
implements ReadWriteLock

Read/write lock associated with clients rather than threads. Either its read lock or write lock can be released by a thread different from the one acquiring them (but supposed to be requested by the same client).

Constructor Summary

Constructors

Constructor and Description
ClientRWLock(int maxReaders) Constructs a new ClientRWLock.

Method Summary

Modifier and Type	Method and Description
void	addReference() Increments the reference count.
int	dropReference() Decrements the reference count.
int	getReferenceCount()
Lock	readLock()
Lock	writeLock()

Methods inherited from class java.lang.Object

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

Constructor Detail

ClientRWLock

public ClientRWLock(int maxReaders)

Constructs a new ClientRWLock.

Parameters:

maxReaders - total number of permits, decides the max number of concurrent readers

Method Detail

readLock

public Lock readLock()

Specified by:

readLock in interface ReadWriteLock

writeLock

public Lock writeLock()

Specified by:

writeLock in interface ReadWriteLock

getReferenceCount

public int getReferenceCount()

Returns:

the reference count

addReference

public void addReference()

Increments the reference count.

dropReference

public int dropReference()

Decrements the reference count.

Returns:

the new reference count