eu.geclipse.ui.problems.CheckSystemTimeSolution.java Source code

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Here is the source code for eu.geclipse.ui.problems.CheckSystemTimeSolution.java

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/*****************************************************************************
 * Copyright (c) 2007, 2008 g-Eclipse Consortium 
 * 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
 *
 * Initial development of the original code was made for the
 * g-Eclipse project founded by European Union
 * project number: FP6-IST-034327  http://www.geclipse.eu/
 *
 * Contributors:
 *    Ariel Garcia - initial API and implementation
 *                 - updated to new problem reporting
 *****************************************************************************/

package eu.geclipse.ui.problems;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

import eu.geclipse.core.reporting.ISolution;
import eu.geclipse.core.reporting.ISolver;
import eu.geclipse.core.reporting.ProblemException;
import eu.geclipse.core.util.TimeChecker;
import eu.geclipse.ui.dialogs.ProblemDialog;

/**
 * {@link ISolution} for checking the system time against
 * a set of reference time servers.
 * 
 * @author agarcia
 */
public class CheckSystemTimeSolution implements ISolver {

    /* (non-Javadoc)
     * @see eu.geclipse.core.reporting.ISolver#solve()
     */
    public void solve() {
        final TimeChecker tr = new TimeChecker();
        boolean timeOK = false;
        boolean timeCheckValid = true;

        // Get the shell first
        IWorkbench workbench = PlatformUI.getWorkbench();
        IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();
        Shell shell = null;
        if (window != null) {
            shell = window.getShell();
        }

        IRunnableWithProgress runnable = new IRunnableWithProgress() {
            public void run(final IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
                try {
                    tr.checkSysTime(monitor);
                } catch (ProblemException pe) {
                    throw new InvocationTargetException(pe);
                }
            }
        };

        // Run the dialog
        try {
            new ProgressMonitorDialog(shell).run(true, true, runnable);
        } catch (InterruptedException ie) {
            // The user interrupted the operation
            timeCheckValid = false;
        } catch (InvocationTargetException ite) {
            // The system time check failed, inform the user
            Throwable cause = ite.getCause();
            if (cause instanceof ProblemException) {
                String title = Messages.getString("CheckSystemTimeSolution.failed_dialog_title"); //$NON-NLS-1$
                String msg = Messages.getString("CheckSystemTimeSolution.failed_check_system_time"); //$NON-NLS-1$
                ProblemDialog.openProblem(shell, title, msg, cause);
                timeCheckValid = false;
            }
        }

        // Don't display any more dialogs, we cannot help further...
        if (!timeCheckValid) {
            return;
        }

        // The servers have been queried
        timeOK = tr.getTimeCheckStatus();

        String title = Messages.getString("CheckSystemTimeSolution.dialog_title"); //$NON-NLS-1$
        Shell parent = shell;

        // Construct the message string
        String message;
        if (timeOK) {
            message = Messages.getString("CheckSystemTimeSolution.system_clock_ok"); //$NON-NLS-1$
            message = String.format(message, Integer.valueOf(tr.getTolerance()));
        } else {
            message = Messages.getString("CheckSystemTimeSolution.system_clock_not_ok"); //$NON-NLS-1$
            message = String.format(message, Long.valueOf(tr.getOffset()));
        }
        message += ":\n\t" + tr.getSystemDate() + "\n\n"; //$NON-NLS-1$ //$NON-NLS-2$
        message += Messages.getString("CheckSystemTimeSolution.queried_servers_report"); //$NON-NLS-1$
        message += ":\n\t" + tr.getReferenceDate(); //$NON-NLS-1$

        // Show the appropriate dialog
        if (timeOK) {
            MessageDialog.openInformation(parent, title, message);
        } else {
            MessageDialog.openError(parent, title, message);
        }
    }

}