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/*
* Copyright (c) 2004 - 2012 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:
* Victor Roldan Betancort - initial API and implementation
* Eike Stepper - maintenance
*/
package org.eclipse.emf.cdo.ui.internal.ide.actions;
import org.eclipse.emf.cdo.CDOObject;
import org.eclipse.emf.cdo.transaction.CDOTransaction;
import org.eclipse.emf.cdo.ui.internal.ide.messages.Messages;
import org.eclipse.emf.cdo.view.CDOView;
import org.eclipse.net4j.util.AdapterUtil;
import org.eclipse.net4j.util.ui.UIUtil;
import org.eclipse.net4j.util.ui.actions.LongRunningActionDelegate;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.jface.action.IAction;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import java.text.MessageFormat;
/**
* @author Victor Roldan Betancort
*/
public abstract class TransactionalBackgroundActionDelegate extends LongRunningActionDelegate implements
IObjectActionDelegate
{
private IWorkbenchPart targetPart;
private String text;
private CDOObject transactionalObject;
public TransactionalBackgroundActionDelegate(String text)
{
this.text = text;
}
public void setActivePart(IAction action, IWorkbenchPart targetPart)
{
this.targetPart = targetPart;
selectionChanged(action, getSelection());
}
public IWorkbenchPart getTargetPart()
{
return targetPart;
}
@Override
protected String getText()
{
return text;
}
protected int getCommitWorkPercent()
{
return 90;
}
@Override
protected final void preRun() throws Exception
{
Object element = UIUtil.getElement(getSelection());
CDOObject object = AdapterUtil.adapt(element, CDOObject.class);
if (object != null)
{
transactionalObject = preRun(object);
if (transactionalObject != null)
{
CDOView view = transactionalObject.cdoView();
if (!(view instanceof CDOTransaction))
{
throw new IllegalStateException(MessageFormat.format(
Messages.getString("TransactionalBackgroundAction_0"), transactionalObject)); //$NON-NLS-1$
}
// Bypass cancel()
return;
}
}
cancel();
}
/**
* Usually opens a new transaction based on the passed object and its view/session and returns a "contextualized" copy
* of this object. Clients may override to access the UI thread before the background job is started or change the
* contextualization procedure.
*
* @param object
* Usually an object in a read-only view that needs to be modified in a separate transaction.
* @return A transactional copy of the passed object, or <code>null</code> to indicate cancelation of this action.
*/
protected CDOObject preRun(CDOObject object)
{
CDOTransaction transaction = object.cdoView().getSession().openTransaction();
CDOObject transactionalObject = transaction.getObject(object);
return transactionalObject;
}
@Override
protected final void doRun(IProgressMonitor progressMonitor) throws Exception
{
CDOTransaction transaction = (CDOTransaction)transactionalObject.cdoView();
int commitWorkPercent = getCommitWorkPercent();
progressMonitor.beginTask(Messages.getString("TransactionalBackgroundAction_1"), 100); //$NON-NLS-1$
try
{
doRun(transaction, transactionalObject, new SubProgressMonitor(progressMonitor, 100 - commitWorkPercent));
transaction.commit(new SubProgressMonitor(progressMonitor, commitWorkPercent));
}
finally
{
progressMonitor.done();
transaction.close();
transactionalObject = null;
}
}
protected abstract void doRun(CDOTransaction transaction, CDOObject object, IProgressMonitor progressMonitor)
throws Exception;
}
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