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org.scopemvc.util
Class BasicObjectPool  

java.lang.Object
  org.scopemvc.util.BasicObjectPool

All Implemented Interfaces:

ObjectPool

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public class BasicObjectPool

extends java.lang.Object

implements ObjectPool

Pools objects given a factory and optional maximum pool size.

Version:

$Revision: 1.3 $

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Field Summary
private  PoolableObjectFactory	factory           The factory used to create pooled objects
private  java.util.LinkedList	freeList           Queue of free instances
private  java.lang.Object	lock           Used for synchronisation
private static org.apache.commons.logging.Log	LOG
private  int	maxSize           The maximum number of objects to pool

 

Constructor Summary

BasicObjectPool(PoolableObjectFactory inFactory)           Construct a basic object pool with the specified factory and a maximum pool size of Integer.MAX_VALUE.

BasicObjectPool(PoolableObjectFactory inFactory, int inMaxSize)           Construct a basic object pool with the specified factory and maximum pool size.

 

Method Summary
java.lang.Object	borrowObject()           Obtains an instance of the pooled class.
java.lang.Object	borrowObjectIfExists()           Obtains an instance of the pooled class.
void	returnObject(java.lang.Object object)           Returns an instance to the pool.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

LOG

private static final org.apache.commons.logging.Log LOG

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lock

private final java.lang.Object lock

Used for synchronisation

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freeList

private final java.util.LinkedList freeList

Queue of free instances

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factory

private final PoolableObjectFactory factory

The factory used to create pooled objects

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maxSize

private final int maxSize

The maximum number of objects to pool

Constructor Detail

BasicObjectPool

public BasicObjectPool(PoolableObjectFactory inFactory)

Construct a basic object pool with the specified factory and a maximum pool size of Integer.MAX_VALUE.

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BasicObjectPool

public BasicObjectPool(PoolableObjectFactory inFactory,
                       int inMaxSize)

Construct a basic object pool with the specified factory and maximum pool size.

Method Detail

borrowObject

public java.lang.Object borrowObject()

Obtains an instance of the pooled class. Blocks if no free instances.

Specified by:

borrowObject in interface ObjectPool

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borrowObjectIfExists

public java.lang.Object borrowObjectIfExists()

Obtains an instance of the pooled class. Returns null if no free instances.

Specified by:

borrowObjectIfExists in interface ObjectPool

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returnObject

public void returnObject(java.lang.Object object)

Returns an instance to the pool.

Specified by:

returnObject in interface ObjectPool

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