cacheupdate.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 76 行

/*
 * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source 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, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.amber.query;

import com.caucho.amber.entity.Entity;

/**
 * Callback when an entity is created, destroyed or modified.
 */
abstract public class CacheUpdate {
  private CachedQuery _query;

  protected CacheUpdate(CachedQuery query)
  {
    _query = query;
  }

  /**
   * Called when an entity is added.
   */
  public void add(Entity obj)
  {
    update();
  }

  /**
   * Called when an entity is deleted.
   */
  public void delete(Object key)
  {
    update();
  }

  /**
   * Called when an entity is deleted.
   */
  public void update(Entity object)
  {
    update();
  }
  
  /**
   * Update the query.
   */
  protected void update()
  {
    _query.update();
  }
}