com.skysql.manager.ui.components.BackupStrategiesLayout.java Source code

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Here is the source code for com.skysql.manager.ui.components.BackupStrategiesLayout.java

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/*
 * This file is distributed as part of the MariaDB Manager.  It 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,
 * version 2.
 *
 * 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, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Copyright 2012-2014 SkySQL Corporation Ab
 */

package com.skysql.manager.ui.components;

import com.skysql.manager.ClusterComponent;
import com.skysql.manager.ManagerUI;
import com.skysql.manager.api.SystemInfo;
import com.vaadin.server.VaadinSession;
import com.vaadin.ui.NativeSelect;
import com.vaadin.ui.VerticalLayout;

/**
 * The Class BackupStrategiesLayout.
 */
@SuppressWarnings("serial")
public class BackupStrategiesLayout extends VerticalLayout {

    /**
     * The Enum Strategies.
     */
    private enum Strategies {
        None, Good, Better, Best;
    }

    private UpdaterThread updaterThread;
    private NativeSelect selectStrategy;

    /**
     * Instantiates a new backup strategies layout.
     */
    public BackupStrategiesLayout() {

        addStyleName("strategiesLayout");
        setSpacing(true);
        setMargin(true);

        /***
        HorizontalLayout strategyLayout = new HorizontalLayout();
        addComponent(strategyLayout);
        strategyLayout.setSpacing(true);
        FormLayout strategyForm = new FormLayout();
        strategyLayout.addComponent(strategyForm);
            
        selectStrategy = new NativeSelect("Current Strategy");
        strategyForm.addComponent(selectStrategy);
        selectStrategy.setImmediate(true);
        selectStrategy.setNullSelectionAllowed(false);
        for (Strategies strategy : Strategies.values()) {
           selectStrategy.addItem(strategy.name());
        }
            
        final Label strategyInfo = new Label();
        strategyLayout.addComponent(strategyInfo);
        strategyLayout.setComponentAlignment(strategyInfo, Alignment.MIDDLE_LEFT);
            
        selectStrategy.addValueChangeListener(new ValueChangeListener() {
           private static final long serialVersionUID = 0x4C656F6E6172646FL;
            
           public void valueChange(ValueChangeEvent event) {
            
        String info = null;
        switch (Strategies.valueOf((String) event.getProperty().getValue())) {
        case None:
           info = "No backups.";
           break;
        case Good:
           info = "Full once a week on Sunday.";
           //info = "Full every Sunday at 02:00; Incremental every day at 03:00.";
           break;
        case Better:
           info = "Full every workday Monday-Friday.";
           //info = "Full every Sunday and Wednesday at 02:00; Incremental every day at 03:00.";
           break;
        case Best:
           info = "Full every day.";
           //info = "Full every day at 02:00; Incremental every hour.";
           break;
        }
        strategyInfo.setValue(" - " + info);
            
           }
        });
        selectStrategy.select(Strategies.None.name());
        ***/

    }

    /**
     * Refresh.
     */
    public void refresh() {

        ManagerUI.log(this.getClass().getName() + " refresh()");
        updaterThread = new UpdaterThread(updaterThread);
        updaterThread.start();

    }

    /**
     * The Class UpdaterThread.
     */
    class UpdaterThread extends Thread {

        /** The old updater thread. */
        UpdaterThread oldUpdaterThread;

        /** The flagged. */
        volatile boolean flagged = false;

        /**
         * Instantiates a new updater thread.
         *
         * @param oldUpdaterThread the old updater thread
         */
        UpdaterThread(UpdaterThread oldUpdaterThread) {
            this.oldUpdaterThread = oldUpdaterThread;
        }

        /* (non-Javadoc)
         * @see java.lang.Thread#run()
         */
        @Override
        public void run() {
            if (oldUpdaterThread != null && oldUpdaterThread.isAlive()) {
                ManagerUI.log(this.getClass().getName() + " - Old thread is alive: " + oldUpdaterThread);
                oldUpdaterThread.flagged = true;
                oldUpdaterThread.interrupt();
                try {
                    ManagerUI.log(this.getClass().getName() + " - Before Join");
                    oldUpdaterThread.join();
                    ManagerUI.log(this.getClass().getName() + " - After Join");
                } catch (InterruptedException iex) {
                    ManagerUI.log(this.getClass().getName() + " - Interrupted Exception");
                    return;
                }

            }

            ManagerUI.log(this.getClass().getName() + " - UpdaterThread.this: " + this);
            asynchRefresh(this);
        }
    }

    /**
     * Asynch refresh.
     *
     * @param updaterThread the updater thread
     */
    private void asynchRefresh(final UpdaterThread updaterThread) {

        ManagerUI managerUI = getSession().getAttribute(ManagerUI.class);
        SystemInfo systemInfo = getSession().getAttribute(SystemInfo.class);

        String systemID = systemInfo.getCurrentID();
        if (SystemInfo.SYSTEM_ROOT.equals(systemID)) {
            ClusterComponent clusterComponent = VaadinSession.getCurrent().getAttribute(ClusterComponent.class);
            systemID = clusterComponent.getID();
        }

        managerUI.access(new Runnable() {
            @Override
            public void run() {
                // Here the UI is locked and can be updated

                ManagerUI.log(this.getClass().getName() + " access.run(): ");

            }
        });

    }

}