mirror of
https://github.com/bancika/diy-layout-creator
synced 2026-11-10 17:22:09 +10:00
Auto-save plugin now works by periodically creating project backups in
user\.diylc\autoSave directory and maintains file history, keeping the last X versions of the file. Maximum size for all backups is configurable and pre-set to 64MB
This commit is contained in:
Branislav Stojkovic
@@ -21,86 +21,48 @@
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*/
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package org.diylc.swing.plugins.autosave;
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import java.io.File;
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import java.util.Date;
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import java.util.EnumSet;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import javax.swing.SwingUtilities;
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import org.diylc.appframework.miscutils.ConfigurationManager;
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import org.diylc.appframework.miscutils.Utils;
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import org.diylc.common.EventType;
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import org.diylc.common.IPlugIn;
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import org.diylc.common.IPlugInPort;
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import org.diylc.core.IView;
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import org.diylc.presenter.Presenter;
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import org.diylc.swing.gui.DummyView;
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import java.io.File;
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import java.text.DateFormat;
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import java.text.SimpleDateFormat;
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import java.util.Arrays;
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import java.util.Comparator;
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import java.util.Date;
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import java.util.EnumSet;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import org.apache.log4j.Logger;
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import org.diylc.appframework.miscutils.Utils;
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import org.diylc.common.EventType;
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import org.diylc.common.IPlugIn;
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import org.diylc.common.IPlugInPort;
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import org.diylc.core.IView;
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public class AutoSavePlugin implements IPlugIn {
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private static final String AUTO_SAVE_FILE_NAME = Utils.getUserDataDirectory("diylc") + "autoSave.diy";
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private static final String AUTO_SAVE_PATH = Utils.getUserDataDirectory("diylc") + "autoSave";
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private static final Logger LOG = Logger.getLogger(AutoSavePlugin.class);
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protected static final long autoSaveFrequency = 60 * 1000;
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protected static final long autoSaveFrequencyMs = 60 * 1000;
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protected static final int maxTotalSizeMb = 64;
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private ExecutorService executor;
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private IPlugInPort plugInPort;
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private IView view;
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private long lastSave = 0;
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public AutoSavePlugin(IView view) {
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this.view = view;
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executor = Executors.newSingleThreadExecutor();
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}
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@Override
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public void connect(IPlugInPort plugInPort) {
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this.plugInPort = plugInPort;
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SwingUtilities.invokeLater(new Runnable() {
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@Override
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public void run() {
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boolean wasAbnormal = ConfigurationManager.getInstance().readBoolean(IPlugInPort.ABNORMAL_EXIT_KEY, false);
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Date lastHeartbeat = (Date) ConfigurationManager.getInstance().readObject(IPlugInPort.HEARTBEAT, new Date());
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long msSinceHeartbeat = new Date().getTime() - lastHeartbeat.getTime();
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File autoSaved = new File(AUTO_SAVE_FILE_NAME);
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if (autoSaved.exists())
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// try to figure out if another instance is running. Only pull auto-saved file if there's no recent heartbeat
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if (wasAbnormal && msSinceHeartbeat > autoSaveFrequency) {
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IPlugInPort testPresenter = new Presenter(new DummyView());
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testPresenter.loadProjectFromFile(AUTO_SAVE_FILE_NAME);
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// Only prompt if there is something saved in the
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// auto-saved file.
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if (!testPresenter.getCurrentProject().getComponents().isEmpty()) {
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int decision =
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view.showConfirmDialog(
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"It appears that application was not closed normally in the previous session. Do you want to open the last auto-saved file?",
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"Auto-Save", IView.YES_NO_OPTION, IView.QUESTION_MESSAGE);
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if (decision == IView.YES_OPTION) {
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AutoSavePlugin.this.plugInPort.loadProjectFromFile(AUTO_SAVE_FILE_NAME);
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}
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}
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} else
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autoSaved.delete();
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// Set abnormal flag to true, GUI side of the app must flip to
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// false when app closes regularly.
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ConfigurationManager.getInstance().writeValue(IPlugInPort.ABNORMAL_EXIT_KEY, true);
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}
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});
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// write heartbeat periodically
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new Thread(new Runnable() {
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@Override
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public void run() {
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try {
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Thread.sleep(autoSaveFrequency);
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} catch (InterruptedException e) {
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}
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ConfigurationManager.getInstance().writeValue(IPlugInPort.HEARTBEAT, new Date());
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}
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}).start();
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this.plugInPort = plugInPort;
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// create the directory if needed
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File dir = new File(AUTO_SAVE_PATH);
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if (!dir.exists())
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dir.mkdirs();
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}
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@Override
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@@ -111,18 +73,67 @@ public class AutoSavePlugin implements IPlugIn {
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@Override
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public void processMessage(EventType eventType, Object... params) {
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if (eventType == EventType.PROJECT_MODIFIED) {
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if (System.currentTimeMillis() - lastSave > autoSaveFrequency) {
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if (System.currentTimeMillis() - lastSave > autoSaveFrequencyMs) {
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executor.execute(new Runnable() {
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@Override
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public void run() {
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Thread.currentThread().setPriority(Thread.MIN_PRIORITY);
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lastSave = System.currentTimeMillis();
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plugInPort.saveProjectToFile(AUTO_SAVE_FILE_NAME, true);
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lastSave = System.currentTimeMillis();
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String fileName = generateBackupFileName(plugInPort.getCurrentFileName());
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LOG.info("Creating backup file: " + fileName);
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plugInPort.saveProjectToFile(fileName, true);
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cleanupExtra();
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}
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});
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}
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}
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}
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private String generateBackupFileName(String baseFileName) {
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if (baseFileName == null)
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baseFileName = "Untitled";
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File file = new File(baseFileName);
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String name = file.getName();
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// remove extension
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if (name.toLowerCase().endsWith(".diy"))
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name = name.substring(name.length() - 4);
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// append date and time
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Date date = new Date();
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DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd-HHmmss");
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file = new File(AUTO_SAVE_PATH + File.separator + name + "." + dateFormat.format(date) + ".diy");
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// make sure that it doesn't already exist
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int i = 2;
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while (file.exists()) {
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file = new File(AUTO_SAVE_PATH + File.separator + name + "." + dateFormat.format(date) + "-" + i + ".diy");
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i++;
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}
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return file.getAbsolutePath();
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}
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private void cleanupExtra() {
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File[] files = new File(AUTO_SAVE_PATH).listFiles();
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// sort files by date
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Arrays.sort(files, new Comparator<File>() {
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@Override
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public int compare(File o1, File o2) {
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return new Long(o1.lastModified()).compareTo(o2.lastModified());
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}
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});
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long totalSize = 0;
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long maxTotalSize = maxTotalSizeMb * 1024 * 1024;
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for (File f : files)
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totalSize += f.length();
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int i = 0;
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while (i < files.length && totalSize > maxTotalSize) {
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totalSize -= files[i].length();
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LOG.info("Deleteting old backup file: " + files[i].getName());
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files[i].delete();
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i++;
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}
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}
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}
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