/*******************************************************************************
* Copyright (c) 2010 Wind River Systems, Inc. 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:
* Markus Schorn - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.pdom;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.cdt.core.index.IndexerSetupParticipant;
import org.eclipse.cdt.core.model.ICProject;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.jobs.IJobChangeEvent;
import org.eclipse.core.runtime.jobs.IJobChangeListener;
import org.eclipse.core.runtime.jobs.IJobManager;
import org.eclipse.core.runtime.jobs.Job;
/**
* Postpones indexer setup until there are no running refresh jobs.
*/
public class WaitForRefreshJobs extends IndexerSetupParticipant {
private Set<ICProject> fProjects= new HashSet<ICProject>();
private Set<Job> fRefreshJobs= Collections.synchronizedSet(new HashSet<Job>());
private IJobChangeListener fJobListener= new IJobChangeListener() {
@Override
public void sleeping(IJobChangeEvent event) {}
@Override
public void scheduled(IJobChangeEvent event) {}
@Override
public void running(IJobChangeEvent event) {}
@Override
public void done(IJobChangeEvent event) {
onJobDone(event.getJob());
}
@Override
public void awake(IJobChangeEvent event) {}
@Override
public void aboutToRun(IJobChangeEvent event) {}
};
@Override
public boolean postponeIndexerSetup(ICProject project) {
// Protect set of projects
synchronized(this) {
if (isRefreshing()) {
fProjects.add(project);
return true;
}
}
return false;
}
protected void onJobDone(Job job) {
fRefreshJobs.remove(job);
if (fRefreshJobs.isEmpty()) {
checkNotifyIndexer();
}
}
private void checkNotifyIndexer() {
Set<ICProject> projects;
// Protect set of projects
synchronized(this) {
if (isRefreshing())
return;
projects= fProjects;
fProjects= new HashSet<ICProject>();
}
for (ICProject project : projects) {
notifyIndexerSetup(project);
}
}
private boolean isRefreshing() {
updateRefreshJobs(ResourcesPlugin.FAMILY_AUTO_REFRESH);
if (fRefreshJobs.size() != 0) {
return true;
}
updateRefreshJobs(ResourcesPlugin.FAMILY_MANUAL_REFRESH);
if (fRefreshJobs.size() != 0) {
return true;
}
return false;
}
private void updateRefreshJobs(Object jobFamily) {
IJobManager jobManager = Job.getJobManager();
Job[] refreshJobs = jobManager.find(jobFamily);
if (refreshJobs != null) {
for (Job j : refreshJobs) {
if (fRefreshJobs.add(j)) {
j.addJobChangeListener(fJobListener);
// In case the job has finished in the meantime
if (j.getState() == Job.NONE) {
fRefreshJobs.remove(j);
}
}
}
}
}
}