User: fleury
Date: 00/08/16 13:55:45
Added: src/main/org/jboss/util FastKey.java
Log:
FastKey implementation
Revision Changes Path
1.1 jboss/src/main/org/jboss/util/FastKey.java
Index: FastKey.java
===================================================================
/*
* jBoss, the OpenSource EJB server
*
* Distributable under GPL license.
* See terms of license at gnu.org.
*/
package org.jboss.util;
/**
* FastKey
*
* FastKey is a hack to enable fool proof and fast operation of caches for Entity
* In the case of complex PK if a developer misses hash and equals the maps won't
* properly work in jboss. Here we provide an wrapper to the DB Key and the hash
* is over-written so that we never miss a hit in cache and have constant speed.
*
* @see org.jboss.ejb.plugins.NoPassivationInstanceCache.java
* @author <a href="[EMAIL PROTECTED]">Marc Fleury</a>
* @version $Revision: 1.1 $
*/
public class FastKey
{
// Constants -----------------------------------------------------
// Attributes ----------------------------------------------------
// The fastKey that identifies the association between EJBObject and context
public Long fastKey;
// The id that the instance holding this fastKey is supposed to represent (DB)
public Object id;
// Static --------------------------------------------------------
// The seed for the fastKey id
// MF FIXME: I suspect this is weak, if somebody ask for these all the time
(heavy server)
// then a server restart will recieve requests from previous servers and miss
these...
// Think more about it.
private static long id = System.currentTimeMillis();
// Constructors --------------------------------------------------
// Public --------------------------------------------------------
public FastKey(Object id) {
fastKey = getNextFaskKey();
this.id = id;
}
// Z implementation ----------------------------------------------
// Package protected ---------------------------------------------
// Protected -----------------------------------------------------
protected Long nextFastKey()
{
//increment the timeStamp
return new Long(id++);
}
// Private -------------------------------------------------------
// HashCode and Equals over write --------------------------------
public int hashCode() {
// the fastKey is always assigned
return fastKey.intValue();
}
public boolean equals(Object object) {
if (object instanceof FastKey) {
return fastKey.equals(((FastKey) object).fastKey);
}
return false;
}
// Inner classes -------------------------------------------------
}
