org.colombbus.tangara.update.UpdateCheckRunner.java Source code

Introduction

Here is the source code for org.colombbus.tangara.update.UpdateCheckRunner.java

Source

/**
 * Tangara is an educational platform to get started with programming.
 * Copyright (C) 2009-2012 Colombbus (http://www.colombbus.org)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.colombbus.tangara.update;

import java.awt.Component;
import java.io.IOException;

import javax.swing.JDialog;
import javax.swing.JOptionPane;
import javax.swing.SwingUtilities;

import org.apache.commons.lang.Validate;
import org.apache.log4j.Logger;
import org.colombbus.tangara.core.Version;

class UpdateCheckRunner implements Runnable {

    private static final Logger LOG = Logger.getLogger(UpdateCheckRunner.class);

    private String updateSite;
    private Version currentVersion;
    private SoftwareUpdateInfo updateInfo;
    private boolean showNotFoundMsg = false;

    public UpdateCheckRunner(Version currentVersion, String updateSite) {
        Validate.notNull(currentVersion, "currentVersion argument is null"); //$NON-NLS-1$
        Validate.notNull(updateSite, "updateSite argument is null"); //$NON-NLS-1$

        this.currentVersion = currentVersion;
        this.updateSite = updateSite;
    }

    public void setShowNotFoundMessage(boolean showNotFoundMsg) {
        this.showNotFoundMsg = showNotFoundMsg;
    }

    @Override
    public void run() {
        try {
            updateInfo = readSoftwareUpdateInfo();
            if (updateInfo.moreRecentThan(currentVersion)) {
                showUpdateSoftwareWindow();
            } else if (showNotFoundMsg) {
                showNoUpdateWindow();
            }
        } catch (IOException ioEx) {
            LOG.error("Fail to connect to the web", ioEx); //$NON-NLS-1$
        } catch (Throwable th) {
            LOG.error("An error occurs", th); //$NON-NLS-1$
        }

    }

    static class DisplayWindowRunner implements Runnable {

        private SoftwareUpdateInfo info;

        public DisplayWindowRunner(SoftwareUpdateInfo info) {
            this.info = info;
        }

        @Override
        public void run() {
            JDialog dialog = new SoftwareUpdateDialog(info);
            dialog.setLocationRelativeTo(null);
            dialog.setVisible(true);
        }
    }

    private void showUpdateSoftwareWindow() {
        Runnable displayer = new DisplayWindowRunner(updateInfo);
        runInEventDispatcherThread(displayer);
    }

    private static void runInEventDispatcherThread(Runnable displayer) {
        if (SwingUtilities.isEventDispatchThread()) {
            displayer.run();
        } else {
            SwingUtilities.invokeLater(displayer);
        }
    }

    static class NoUpdateFoundRunner implements Runnable {

        public NoUpdateFoundRunner() {
        }

        @Override
        public void run() {
            Component parentComponent = null;
            String message = Messages.getString("NoUpdateFound.message"); //$NON-NLS-1$
            String title = Messages.getString("NoUpdateFound.title"); //$NON-NLS-1$
            int messageType = JOptionPane.INFORMATION_MESSAGE;
            JOptionPane.showMessageDialog(parentComponent, message, title, messageType);
        }
    }

    private static void showNoUpdateWindow() {
        Runnable displayer = new NoUpdateFoundRunner();
        runInEventDispatcherThread(displayer);
    }

    private SoftwareUpdateInfo readSoftwareUpdateInfo() throws IOException {
        UpdateRequester requester = new UpdateRequester();
        requester.setUpdateSite(updateSite);
        return requester.requestSoftwareInfo();
    }

}