| /******************************************************************************* |
| * Copyright (c) 2005, 2007 Cognos Incorporated, IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Cognos Incorporated - initial API and implementation |
| * IBM Corporation - bug fixes and enhancements |
| *******************************************************************************/ |
| package org.eclipse.equinox.http.servlet.internal; |
| |
| public abstract class Registration { |
| |
| protected int referenceCount; |
| |
| public synchronized void addReference() { |
| ++referenceCount; |
| } |
| |
| public synchronized void removeReference() { |
| --referenceCount; |
| if (referenceCount == 0) { |
| notifyAll(); |
| } |
| } |
| |
| public synchronized void destroy() { |
| boolean interrupted = false; |
| try { |
| while (referenceCount != 0) { |
| try { |
| wait(); |
| } catch (InterruptedException e) { |
| // wait until the servlet is inactive but save the interrupted status |
| interrupted = true; |
| } |
| } |
| } finally { |
| if (interrupted) |
| Thread.currentThread().interrupt(); //restore the interrupted state |
| } |
| } |
| } |