| /******************************************************************************* |
| * Copyright (c) 2000, 2004 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.team.internal.ccvs.core.syncinfo; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.resources.IContainer; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.team.core.TeamException; |
| import org.eclipse.team.internal.ccvs.core.util.Assert; |
| import org.eclipse.team.internal.core.subscribers.BatchingLock; |
| |
| /** |
| * Provides a per-thread nested locking mechanism. A thread can acquire a |
| * lock on a specific resource by calling acquire(). Subsequently, acquire() can be called |
| * multiple times on the resource or any of its children from within the same thread |
| * without blocking. Other threads that try |
| * and acquire the lock on those same resources will be blocked until the first |
| * thread releases all it's nested locks. |
| * <p> |
| * The locking is managed by the platform via scheduling rules. This class simply |
| * provides the nesting mechnism in order to allow the client to determine when |
| * the lock for the thread has been released. Therefore, this lock will block if |
| * another thread already locks the same resource.</p> |
| */ |
| public class ReentrantLock extends BatchingLock { |
| |
| public class CVSThreadInfo extends ThreadInfo{ |
| private Set changedFolders = new HashSet(); |
| public CVSThreadInfo(IFlushOperation operation) { |
| super(operation); |
| } |
| public void addChangedFolder(IContainer container) { |
| changedFolders.add(container); |
| } |
| public boolean isEmpty() { |
| return changedFolders.isEmpty() && super.isEmpty(); |
| } |
| public IContainer[] getChangedFolders() { |
| return (IContainer[]) changedFolders.toArray(new IContainer[changedFolders.size()]); |
| } |
| public void flush(IProgressMonitor monitor) throws TeamException { |
| try { |
| super.flush(monitor); |
| } finally { |
| // We have to clear the resources no matter what since the next attempt |
| // to flush may not have an appropriate scheduling rule |
| changedFolders.clear(); |
| } |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.internal.core.subscribers.BatchingLock#createThreadInfo(org.eclipse.team.internal.core.subscribers.BatchingLock.IFlushOperation) |
| */ |
| protected ThreadInfo createThreadInfo(IFlushOperation operation) { |
| return new CVSThreadInfo(operation); |
| } |
| |
| public void folderChanged(IContainer folder) { |
| CVSThreadInfo info = (CVSThreadInfo)getThreadInfo(); |
| Assert.isNotNull(info, "Folder changed outside of resource lock"); //$NON-NLS-1$ |
| info.addChangedFolder(folder); |
| } |
| |
| } |