Package org.apache.hadoop.hbase.util

Class IdReadWriteLockWithObjectPool<T>

java.lang.Object

org.apache.hadoop.hbase.util.IdReadWriteLock<T>

org.apache.hadoop.hbase.util.IdReadWriteLockWithObjectPool<T>

@Private
public class IdReadWriteLockWithObjectPool<T>
extends IdReadWriteLock<T>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	IdReadWriteLockWithObjectPool.ReferenceType

Field Summary

Fields

Modifier and Type	Field	Description
private final ObjectPool<T,ReentrantReadWriteLock>	lockPool	The pool to get entry from, entries are mapped by Reference and will be automatically garbage-collected by JVM
private static final int	NB_CONCURRENT_LOCKS
private final IdReadWriteLockWithObjectPool.ReferenceType	refType

Constructor Summary

Constructors

Constructor	Description
IdReadWriteLockWithObjectPool()
IdReadWriteLockWithObjectPool(IdReadWriteLockWithObjectPool.ReferenceType referenceType)	Constructor of IdReadWriteLockWithObjectPool

Method Summary

Modifier and Type	Method	Description
private void	gc()
ReentrantReadWriteLock	getLock(T id)	Get the ReentrantReadWriteLock corresponding to the given id
IdReadWriteLockWithObjectPool.ReferenceType	getReferenceType()
(package private) int	purgeAndGetEntryPoolSize()	For testing

Methods inherited from class org.apache.hadoop.hbase.util.IdReadWriteLock

waitForWaiters

Methods inherited from class java.lang.Object

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

Field Details

NB_CONCURRENT_LOCKS

private static final int NB_CONCURRENT_LOCKS

See Also:

• Constant Field Values

lockPool

private final ObjectPool<T,ReentrantReadWriteLock> lockPool

The pool to get entry from, entries are mapped by Reference and will be automatically garbage-collected by JVM

refType

private final IdReadWriteLockWithObjectPool.ReferenceType refType

Constructor Details

IdReadWriteLockWithObjectPool

public IdReadWriteLockWithObjectPool()

IdReadWriteLockWithObjectPool

public IdReadWriteLockWithObjectPool(IdReadWriteLockWithObjectPool.ReferenceType referenceType)

Constructor of IdReadWriteLockWithObjectPool

Parameters:

referenceType - type of the reference used in lock pool, IdReadWriteLockWithObjectPool.ReferenceType.WEAK by default. Use IdReadWriteLockWithObjectPool.ReferenceType.SOFT if the key set is limited and the locks will be reused with a high frequency

Method Details

getLock

public ReentrantReadWriteLock getLock(T id)

Get the ReentrantReadWriteLock corresponding to the given id

Specified by:

getLock in class IdReadWriteLock<T>

Parameters:

id - an arbitrary number to identify the lock

purgeAndGetEntryPoolSize

int purgeAndGetEntryPoolSize()

For testing

gc

private void gc()

getReferenceType

public IdReadWriteLockWithObjectPool.ReferenceType getReferenceType()