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/*
* Copyright (c) 2011, 2012, 2015, 2016 Eike Stepper (Berlin, Germany) 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:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.emf.cdo.spi.server;
import org.eclipse.emf.cdo.common.branch.CDOBranch;
import org.eclipse.emf.cdo.common.lock.IDurableLockingManager.LockArea;
import org.eclipse.emf.cdo.common.lock.IDurableLockingManager.LockAreaNotFoundException;
import org.eclipse.net4j.util.CheckUtil;
/**
* Static methods that may help with classes related to repository synchronization.
*
* @author Eike Stepper
* @since 4.1
*/
public final class SyncingUtil
{
private SyncingUtil()
{
}
public static InternalView openViewWithLockArea(InternalSession session, InternalLockManager lockManager, CDOBranch viewedBranch, String lockAreaID)
{
LockArea lockArea;
InternalView view;
try
{
lockArea = lockManager.getLockArea(lockAreaID);
// If we get here, the lockArea already exists.
view = (InternalView)lockManager.openView(session, InternalSession.TEMP_VIEW_ID, true, lockAreaID);
}
catch (LockAreaNotFoundException e)
{
// If we get here, the lockArea does not yet exist, so we open
// a view without a lockArea first, then create a lockArea with the given ID,
// and associate it with the view.
view = session.openView(InternalSession.TEMP_VIEW_ID, viewedBranch.getHead());
lockArea = lockManager.createLockArea(view, lockAreaID);
view.setDurableLockingID(lockAreaID);
}
CheckUtil.checkNull(lockAreaID, "lockAreaID");
CheckUtil.checkNull(lockArea, "lockArea");
CheckUtil.checkState(lockAreaID.equals(lockArea.getDurableLockingID()), "lockAreaID has incorrect value");
return view;
}
}
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