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/*******************************************************************************
* Copyright (c) 2004 - 2006 University Of British Columbia 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:
* University Of British Columbia - initial API and implementation
*******************************************************************************/
package org.eclipse.mylar.internal.tasks.ui;
import java.io.File;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.mylar.internal.tasks.ui.util.TaskDataExportJob;
import org.eclipse.mylar.internal.tasks.ui.wizards.TaskDataExportWizard;
import org.eclipse.mylar.tasks.ui.TasksUiPlugin;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.progress.IProgressService;
/**
* @author Rob Elves
*/
public class TaskListBackupManager implements IPropertyChangeListener {
private static final String TITLE_TASKLIST_BACKUP = "Tasklist Backup";
private static final String BACKUP_JOB_NAME = "Scheduled task data backup";
public static final String BACKUP_FAILURE_MESSAGE = "Could not backup task data. Check backup preferences.\n";
private static final long SECOND = 1000;
private static final long MINUTE = 60 * SECOND;
private static final long HOUR = 60 * MINUTE;
private static final long DAY = 24 * HOUR;
private Timer timer;
public TaskListBackupManager() {
// boolean enabled = MylarTaskListPlugin.getMylarCorePrefs().getBoolean(
// TaskListPreferenceConstants.BACKUP_AUTOMATICALLY);
// if (enabled) {
int days = TasksUiPlugin.getDefault().getPreferenceStore().getInt(TaskListPreferenceConstants.BACKUP_SCHEDULE);
if (days > 0) {
start(MINUTE);
}
}
public void start(long delay) {
timer = new Timer();
timer.schedule(new CheckBackupRequired(), delay, HOUR);
}
public void stop() {
timer.cancel();
}
public void propertyChange(PropertyChangeEvent event) {
// if (event.getProperty().equals(TaskListPreferenceConstants.BACKUP_AUTOMATICALLY)) {
// if ((Boolean) event.getNewValue() == true) {
// start(MINUTE);
// } else {
// stop();
// }
// }
}
public void backupNow(boolean synchronous) {
// String destination = MylarTaskListPlugin.getMylarCorePrefs().getString(
// TaskListPreferenceConstants.BACKUP_FOLDER);
String destination = TasksUiPlugin.getDefault().getBackupFolderPath();
File backupFolder = new File(destination);
if (!backupFolder.exists()) {
backupFolder.mkdir();
}
removeOldBackups(backupFolder);
String fileName = TaskDataExportWizard.getZipFileName();
if (!synchronous) {
ExportJob export = new ExportJob(destination, fileName);
export.schedule();
} else {
final TaskDataExportJob backupJob = new TaskDataExportJob(destination, true, fileName);
IProgressService service = PlatformUI.getWorkbench().getProgressService();
try {
service.run(true, false, backupJob);
TasksUiPlugin.getDefault().getPreferenceStore().setValue(TaskListPreferenceConstants.BACKUP_LAST,
new Date().getTime());
} catch (InterruptedException e) {
// ignore
} catch (InvocationTargetException e) {
MessageDialog.openError(null, TITLE_TASKLIST_BACKUP, BACKUP_FAILURE_MESSAGE);
}
}
}
/** public for testing purposes */
public void removeOldBackups(File folder) {
int maxBackups = TasksUiPlugin.getDefault().getPreferenceStore().getInt(TaskListPreferenceConstants.BACKUP_MAXFILES);
File[] files = folder.listFiles();
ArrayList<File> backupFiles = new ArrayList<File>();
for (File file : files) {
if (file.getName().startsWith(TaskDataExportWizard.ZIP_FILE_PREFIX)) {
backupFiles.add(file);
}
}
File[] backupFileArray = backupFiles.toArray(new File[backupFiles.size()]);
if (backupFileArray != null && backupFileArray.length > 0) {
Arrays.sort(backupFileArray, new Comparator<File>() {
public int compare(File file1, File file2) {
return new Long((file1).lastModified()).compareTo(new Long((file2).lastModified()));
}
});
int toomany = backupFileArray.length - maxBackups;
if (toomany > 0) {
for (int x = 0; x < toomany; x++) {
if(backupFileArray[x] != null) {
backupFileArray[x].delete();
}
}
}
}
}
// public File getMostRecentBackup() {
// String destination = TasksUiPlugin.getDefault().getBackupFolderPath();
//
// File backupFolder = new File(destination);
// ArrayList<File> backupFiles = new ArrayList<File>();
// if (backupFolder.exists()) {
// File[] files = backupFolder.listFiles();
// for (File file : files) {
// if (file.getName().startsWith(TaskDataExportWizard.ZIP_FILE_PREFIX)) {
// backupFiles.add(file);
// }
// }
// }
//
// File[] backupFileArray = backupFiles.toArray(new File[backupFiles.size()]);
//
// if (backupFileArray != null && backupFileArray.length > 0) {
// Arrays.sort(backupFileArray, new Comparator<File>() {
// public int compare(File file1, File file2) {
// return (new Long((file1).lastModified()).compareTo(new Long((file2).lastModified()))) * -1;
// }
//
// });
// }
// if (backupFileArray != null && backupFileArray.length > 0) {
// return backupFileArray[0];
// }
//
// return null;
// }
class CheckBackupRequired extends TimerTask {
@Override
public void run() {
if (!Platform.isRunning() || TasksUiPlugin.getDefault() == null) {
return;
} else {
long lastBackup = TasksUiPlugin.getDefault().getPreferenceStore().getLong(
TaskListPreferenceConstants.BACKUP_LAST);
int days = TasksUiPlugin.getDefault().getPreferenceStore().getInt(TaskListPreferenceConstants.BACKUP_SCHEDULE);
long waitPeriod = days * DAY;
final long now = new Date().getTime();
if ((now - lastBackup) > waitPeriod) {
PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() {
public void run() {
backupNow(false);
}
});
}
}
}
}
static class ExportJob extends Job {
final TaskDataExportJob backupJob;
public ExportJob(String destination, String filename) {
super(BACKUP_JOB_NAME);
backupJob = new TaskDataExportJob(destination, true, filename);
}
@Override
protected IStatus run(IProgressMonitor monitor) {
try {
if (Platform.isRunning()) {
backupJob.run(monitor);
TasksUiPlugin.getDefault().getPreferenceStore().setValue(TaskListPreferenceConstants.BACKUP_LAST,
new Date().getTime());
}
} catch (InvocationTargetException e) {
MessageDialog
.openError(null, BACKUP_JOB_NAME,
"Error occured during scheduled tasklist backup.\nCheck settings on Tasklist preferences page.");
} catch (InterruptedException e) {
return Status.CANCEL_STATUS;
}
return Status.OK_STATUS;
}
}
}
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