Copyright (c) 2000, 2014 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2014 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.core.internal.resources;

import org.eclipse.core.internal.utils.Messages;
import org.eclipse.core.internal.utils.Policy;
import org.eclipse.core.resources.ISaveContext;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.*;
import org.eclipse.core.runtime.jobs.Job;

Performs periodic saving (snapshot) of the workspace.
/**
 * Performs periodic saving (snapshot) of the workspace.
 */
public class DelayedSnapshotJob extends Job {

	private static final String MSG_SNAPSHOT = Messages.resources_snapshot;
	private SaveManager saveManager;

	public DelayedSnapshotJob(SaveManager manager) {
		super(MSG_SNAPSHOT);
		this.saveManager = manager;
		setRule(ResourcesPlugin.getWorkspace().getRoot());
		setSystem(true);
	}

	/*
	 * @see Job#run()
	 */
	@Override
	public IStatus run(IProgressMonitor monitor) {
		if (monitor.isCanceled())
			return Status.CANCEL_STATUS;

		try {
			ResourcesPlugin.getWorkspace();
		} catch (IllegalStateException e) {
			// workspace is null, log it as warning only and return OK_STATUS
			Policy.log(IStatus.WARNING, null, e);
			return Status.OK_STATUS;
		}

		try {
			return saveManager.save(ISaveContext.SNAPSHOT, null, Policy.monitorFor(null));
		} catch (CoreException e) {
			return e.getStatus();
		} finally {
			saveManager.operationCount = 0;
			saveManager.snapshotRequested = false;
		}
	}
}