| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.core.internal.runtime; |
| |
| import java.io.*; |
| import java.nio.channels.FileLock; |
| |
| //TODO Given the callers, it should be removed |
| public class PlatformMetaAreaLock { |
| private FileLock fileLock; |
| private FileOutputStream fileStream; |
| private File lockFile; |
| |
| public PlatformMetaAreaLock(File lockFile) { |
| this.lockFile = lockFile; |
| } |
| |
| public boolean acquire() throws IOException { |
| fileStream = new FileOutputStream(lockFile, true); |
| fileLock = fileStream.getChannel().tryLock(); |
| return fileLock != null; |
| } |
| |
| public void release() { |
| if (fileLock != null) { |
| try { |
| fileLock.release(); |
| } catch (IOException e) { |
| //don't complain, we're making a best effort to clean up |
| } |
| fileLock = null; |
| } |
| if (fileStream != null) { |
| try { |
| fileStream.close(); |
| } catch (IOException e) { |
| //don't complain, we're making a best effort to clean up |
| } |
| fileStream = null; |
| } |
| } |
| } |