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/*******************************************************************************
* Copyright (c) 2008-2010 Sonatype, Inc.
* 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:
* Sonatype, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.m2e.core.internal.index;
import java.util.ArrayList;
import java.util.Stack;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.m2e.core.core.IMavenConstants;
import org.eclipse.m2e.core.internal.Messages;
import org.eclipse.m2e.core.jobs.IBackgroundProcessingQueue;
class IndexUpdaterJob extends Job implements IBackgroundProcessingQueue {
public static class IndexUpdaterRule implements ISchedulingRule {
public boolean contains(ISchedulingRule rule) {
return rule == this;
}
public boolean isConflicting(ISchedulingRule rule) {
return rule == this;
}
}
public interface IndexCommand {
abstract void run(IProgressMonitor monitor) throws CoreException;
}
private final Stack<IndexUpdaterJob.IndexCommand> updateQueue = new Stack<IndexUpdaterJob.IndexCommand>();
public IndexUpdaterJob(NexusIndexManager indexManager) {
super(Messages.IndexUpdaterJob_title);
setRule(new IndexUpdaterRule());
}
public void addCommand(IndexUpdaterJob.IndexCommand indexCommand) {
updateQueue.add(indexCommand);
}
public IStatus run(IProgressMonitor monitor) {
monitor.beginTask(getName(), IProgressMonitor.UNKNOWN);
ArrayList<IStatus> problems = new ArrayList<IStatus>();
while(!updateQueue.isEmpty()) {
if (monitor.isCanceled()) {
throw new OperationCanceledException();
}
IndexUpdaterJob.IndexCommand command = updateQueue.pop();
try {
command.run(monitor);
} catch(CoreException ex) {
problems.add(ex.getStatus());
}
}
monitor.done();
return problems.isEmpty()? Status.OK_STATUS: new MultiStatus(IMavenConstants.PLUGIN_ID, -1, problems.toArray(new IStatus[problems.size()]), null, null);
}
public boolean isEmpty() {
return updateQueue.isEmpty();
}
}
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