com.carolinarollergirls.scoreboard.xml.AutoSaveScoreBoard.java Source code

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Here is the source code for com.carolinarollergirls.scoreboard.xml.AutoSaveScoreBoard.java

Source

package com.carolinarollergirls.scoreboard.xml;
/**
 * Copyright (C) 2008-2012 Mr Temper <MrTemper@CarolinaRollergirls.com>
 *
 * This file is part of the Carolina Rollergirls (CRG) ScoreBoard.
 * The CRG ScoreBoard is licensed under either the GNU General Public
 * License version 3 (or later), or the Apache License 2.0, at your option.
 * See the file COPYING for details.
 */

import java.io.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;

import org.jdom.*;
import org.jdom.output.*;

import org.apache.commons.io.*;

import com.carolinarollergirls.scoreboard.*;

public class AutoSaveScoreBoard implements Runnable {
    public AutoSaveScoreBoard(XmlScoreBoard xsB) {
        xmlScoreBoard = xsB;
    }

    public synchronized void start() {
        try {
            FileUtils.forceMkdir(new File(ScoreBoardManager.getDefaultPath(), DIRECTORY_NAME));
        } catch (IOException ioE) {
            ScoreBoardManager.printMessage(
                    "WARNING: Unable to create auto-save directory '" + DIRECTORY_NAME + "' : " + ioE.getMessage());
            return;
        }
        Runnable r = new Runnable() {
            public void run() {
                backupAutoSavedFiles();
                ScoreBoardManager.printMessage("Starting auto-save");
                running = executor.scheduleWithFixedDelay(AutoSaveScoreBoard.this, 0, SAVE_DELAY, TimeUnit.SECONDS);
            }
        };
        running = executor.schedule(r, SAVE_DELAY, TimeUnit.SECONDS);
    }

    public synchronized void stop() {
        try {
            running.cancel(false);
            running = null;
        } catch (NullPointerException npE) {
        }
    }

    public void run() {
        FileOutputStream fos = null;
        try {
            int n = AUTOSAVE_FILES;
            getFile(n).delete();
            while (n > 0) {
                File to = getFile(n);
                File from = getFile(--n);
                if (from.exists())
                    FileUtils.moveFile(from, to);
            }
            fos = FileUtils.openOutputStream(getFile(0));
            xmlOutputter.output(editor.filterNoSavePI(xmlScoreBoard.getDocument()), fos);
        } catch (Exception e) {
            ScoreBoardManager.printMessage("WARNING: Unable to auto-save scoreboard : " + e.getMessage());
        } finally {
            if (null != fos)
                try {
                    fos.close();
                } catch (IOException ioE) {
                }
        }
    }

    public static File getFile(int n) {
        return getFile(new File(ScoreBoardManager.getDefaultPath(), DIRECTORY_NAME), n);
    }

    public static File getFile(String dir, int n) {
        return getFile(new File(dir), n);
    }

    public static File getFile(File dir, int n) {
        if (n == 0)
            return new File(dir, (FILE_NAME + "-0-now.xml"));
        else
            return new File(dir, (FILE_NAME + "-" + (n * SAVE_DELAY) + "-secs-ago.xml"));
    }

    protected void backupAutoSavedFiles() {
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
        File mainBackupDir = new File(new File(ScoreBoardManager.getDefaultPath(), DIRECTORY_NAME), "backup");
        File backupDir = new File(mainBackupDir, dateFormat.format(new Date()));
        if (backupDir.exists()) {
            ScoreBoardManager.printMessage("Could not back up auto-save files, backup directory already exists");
        } else {
            int n = 0;
            do {
                File from = getFile(n);
                if (from.exists()) {
                    try {
                        FileUtils.copyFileToDirectory(from, backupDir, true);
                        ScoreBoardManager.printMessage(
                                "Copied auto-save file " + from.getName() + " to " + backupDir.getPath());
                    } catch (Exception e) {
                        ScoreBoardManager.printMessage(
                                "Could not back up auto-save file '" + from.getName() + "' : " + e.getMessage());
                    }
                }
            } while (n++ < AUTOSAVE_FILES);
        }
    }

    protected XmlScoreBoard xmlScoreBoard;
    protected ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
    protected ScheduledFuture running = null;
    protected XmlDocumentEditor editor = new XmlDocumentEditor();
    protected XMLOutputter xmlOutputter = XmlDocumentEditor.getPrettyXmlOutputter();

    public static final String DIRECTORY_NAME = "config/autosave";
    public static final String FILE_NAME = "scoreboard";
    public static final int AUTOSAVE_FILES = 6;
    public static final long SAVE_DELAY = 10; /* 10 secs */
}