com.bea.util
Class ObjectPool

java.lang.Object
  |
  +--com.bea.util.ObjectPool

public abstract class ObjectPool

extends java.lang.Object

A very, very simple object pool base class that assumes clients will check objects back in.

Author:

Copyright © 2000, 2001 BEA Systems, Inc. All Rights Reserved.

Constructor Summary

ObjectPool()

Method Summary

void	checkIn(java.lang.Object obj) A method for checking objects back into the pool...bad clients don't check objects back in, so bad clients get bad performance.
java.lang.Object	checkOut()
protected abstract java.lang.Object	create()
protected abstract void	expire(java.lang.Object obj) A method the pool invokes before the object is discarded from the pool.
protected abstract boolean	validate(java.lang.Object obj)

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectPool

public ObjectPool()

Method Detail

create

protected abstract java.lang.Object create()
                                    throws java.lang.Exception

Returns:

an instance of a pooled object.

Throws:

java.lang.Exception - if an error occurs that prevents the pooled object from being created.

validate

protected abstract boolean validate(java.lang.Object obj)

Returns:

true if the pooled object is still valid, i.e. can be reused

expire

protected abstract void expire(java.lang.Object obj)

A method the pool invokes before the object is discarded from the pool.

checkOut

public final java.lang.Object checkOut()
                                throws java.lang.Exception

Returns:

an object from the pool.

Throws:

java.lang.Exception - if an error occurs retrieving the object

checkIn

public final void checkIn(java.lang.Object obj)

A method for checking objects back into the pool...bad clients don't check objects back in, so bad clients get bad performance.