contextcache.java

一个类似于openJMS分布在ObjectWeb之下的JMS消息中间件。

/*
 * JORAM: Java(TM) Open Reliable Asynchronous Messaging
 * Copyright (C) 2001 - ScalAgent Distributed Technologies
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA.
 *
 * Initial developer(s): Sofiane Chibani
 * Contributor(s): David Feliot, Nicolas Tachker
 */
package fr.dyade.aaa.jndi2.impl;

import java.util.*;
import java.lang.ref.*;

public class ContextCache implements ContextTable {

  private Hashtable table;

  public ContextCache() {
    table = new Hashtable();
  }

  public void put(Object key, NamingContext nc) {
    SoftReference sr = new SoftReference(nc);
    table.put(key, sr);
  }

  public NamingContext get(Object key) {
    SoftReference sr = 
      (SoftReference)table.get(key);
    if (sr != null) {
      Object obj = sr.get();
      if (obj != null) {
        return (NamingContext)obj;
      }
    }
    return null;
  }

  public void remove(Object key) {
    table.remove(key);
  }
}