org.gcube.data.spd.obisplugin.pool
Class ObjectPool<T>

java.lang.Object
  org.gcube.data.spd.obisplugin.pool.ObjectPool<T>

Direct Known Subclasses:

JDBCConnectionPool, PluginSessionPool

public abstract class ObjectPool<T>
extends Object

Author:

"Federico De Faveri defaveri@isti.cnr.it" Adapted from http://sourcemaking.com/design_patterns/object_pool/java

Field Summary

protected boolean	closed
protected long	expirationTime
protected Hashtable<T,Long>	locked
protected static org.gcube.common.core.utils.logging.GCUBELog	logger
protected String	name
protected Hashtable<T,Long>	unlocked

Constructor Summary

ObjectPool(String name, long expirationTime)

Method Summary

void	checkIn(T t)
T	checkOut()
protected abstract T	create()
protected abstract void	expire(T o)
void	expireAllLocked()
void	expireAllUnlocked()
void	shutdown(boolean force)
String	toString()
protected abstract boolean	validate(T o)

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static org.gcube.common.core.utils.logging.GCUBELog logger

expirationTime

protected long expirationTime

locked

protected Hashtable<T,Long> locked

unlocked

protected Hashtable<T,Long> unlocked

closed

protected boolean closed

name

protected String name

Constructor Detail

ObjectPool

public ObjectPool(String name,
                  long expirationTime)

Method Detail

create

protected abstract T create()

validate

protected abstract boolean validate(T o)

expire

protected abstract void expire(T o)

checkOut

public T checkOut()

checkIn

public void checkIn(T t)

shutdown

public void shutdown(boolean force)

expireAllUnlocked

public void expireAllUnlocked()

expireAllLocked

public void expireAllLocked()

toString

public String toString()

Overrides:

toString in class Object