/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil -*-
 *
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is the Grendel mail/news client.
 *
 * The Initial Developer of the Original Code is Netscape Communications
 * Corporation.  Portions created by Netscape are
 * Copyright (C) 1997 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

package calypso.util;

public interface MemoryPressure {
  /**
   * This method is called by the garbage collector just before a
   * garbage collection is about to begin.
   */
  void preGC(long aCurrentHeapSpace, long aMaximumHeapSpace);

  /**
   * This method is called by the garbage collector just after a
   * collection has finished.
   */
  void postGC(long aCurrentHeapSpace, long aMaximumHeapSpace);

  /**
   * This method is called by the garbage collector when the
   * heap is essentially full and can no longer grow. When this
   * occurs <B>all</B> caches of objects should be flushed.
   */
  void panic();
}