md5cache.java

iiitAccessServer是一个用Java编写的基于规则的企业鉴别系统。它作为一个服务器工作

/*******************************************************************************
 * Copyright (C) 2002 ingenieurbuero fuer innovative informationstechnik (iiit)
 * Dipl.-Ing. Joerg Beckmann, Dortmund, Germany
 *
 * version $Id: Md5Cache.java,v 1.4 2003/04/13 20:16:42 joerg Exp $
 ******************************************************************************/

package de.iiit.access.server.util;

import java.util.*;

/** Global cache for MD5 sums
 * @version $Revision: 1.4 $ $Date: 2003/04/13 20:16:42 $
 */
public class Md5Cache
{
    /** CVS Version Tag */
    private static final String vcid = "$Id: Md5Cache.java,v 1.4 2003/04/13 20:16:42 joerg Exp $";
    
    private static final Hashtable cache = new Hashtable();
    
    /** Creates a new instance of Md5Cache */
    private Md5Cache()
    {
    }
    
    /** Puts a new value into the cache
     * @param key the string the MD5 sum is needed for.
     * @param md5sum the MD5 sum corresponding to the key
     */    
    public static void put(String key, String md5sum)
    {
        synchronized(cache)
        {
            cache.put(key, md5sum);
        }
    }
    
    /** Retrieves a previously stored MD5 sum
     * @param key the string the MD5 sum is needed for.
     * @return the MD5 sum corresponding to the key or null if there is none cached.
     */    
    public static String get(String key)
    {
        synchronized(cache)
        {
            return (String) cache.get(key);
        }
    }
    
}

/**
 * $Log: Md5Cache.java,v $
 * Revision 1.4  2003/04/13 20:16:42  joerg
 * Package structure modified
 *
 * Revision 1.3  2003/01/31 20:10:45  joerg
 * Zugriff auf den Cache erfolgt jetzt synchronized.
 *
 * Revision 1.2  2003/01/29 20:37:07  joerg
 * JavaDoc-Kommentare eingefuegt.
 *
 * Revision 1.1  2003/01/29 20:31:09  joerg
 * Neue Klasse zum Cachen von MD5-Summen
 *
 */