source: josm/trunk/src/org/openstreetmap/josm/gui/layer/AutosaveTask.java@ 16436

Last change on this file since 16436 was 16436, checked in by simon04, 4 years ago

see #19251 - Java 8: use Stream
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File size: 19.6 KB
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1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.gui.layer;
3
4import static org.openstreetmap.josm.tools.I18n.marktr;
5import static org.openstreetmap.josm.tools.I18n.tr;
6import static org.openstreetmap.josm.tools.Utils.getSystemProperty;
7
8import java.io.BufferedReader;
9import java.io.File;
10import java.io.FileFilter;
11import java.io.IOException;
12import java.lang.management.ManagementFactory;
13import java.nio.charset.StandardCharsets;
14import java.nio.file.Files;
15import java.nio.file.Path;
16import java.util.ArrayList;
17import java.util.Collections;
18import java.util.Date;
19import java.util.Deque;
20import java.util.HashSet;
21import java.util.Iterator;
22import java.util.LinkedList;
23import java.util.List;
24import java.util.Locale;
25import java.util.Set;
26import java.util.Timer;
27import java.util.TimerTask;
28import java.util.concurrent.ExecutionException;
29import java.util.concurrent.Future;
30import java.util.concurrent.TimeUnit;
31import java.util.regex.Pattern;
32
33import org.openstreetmap.josm.actions.OpenFileAction.OpenFileTask;
34import org.openstreetmap.josm.data.osm.DataSet;
35import org.openstreetmap.josm.data.osm.NoteData;
36import org.openstreetmap.josm.data.osm.NoteData.NoteDataUpdateListener;
37import org.openstreetmap.josm.data.osm.event.AbstractDatasetChangedEvent;
38import org.openstreetmap.josm.data.osm.event.DataSetListenerAdapter;
39import org.openstreetmap.josm.data.osm.event.DataSetListenerAdapter.Listener;
40import org.openstreetmap.josm.data.preferences.BooleanProperty;
41import org.openstreetmap.josm.data.preferences.IntegerProperty;
42import org.openstreetmap.josm.gui.MainApplication;
43import org.openstreetmap.josm.gui.Notification;
44import org.openstreetmap.josm.gui.io.importexport.NoteExporter;
45import org.openstreetmap.josm.gui.io.importexport.NoteImporter;
46import org.openstreetmap.josm.gui.io.importexport.OsmExporter;
47import org.openstreetmap.josm.gui.io.importexport.OsmImporter;
48import org.openstreetmap.josm.gui.layer.LayerManager.LayerAddEvent;
49import org.openstreetmap.josm.gui.layer.LayerManager.LayerChangeListener;
50import org.openstreetmap.josm.gui.layer.LayerManager.LayerOrderChangeEvent;
51import org.openstreetmap.josm.gui.layer.LayerManager.LayerRemoveEvent;
52import org.openstreetmap.josm.gui.util.GuiHelper;
53import org.openstreetmap.josm.spi.preferences.Config;
54import org.openstreetmap.josm.tools.Logging;
55import org.openstreetmap.josm.tools.Utils;
56
57/**
58 * Saves data and note layers periodically so they can be recovered in case of a crash.
59 *
60 * There are 2 directories
61 * - autosave dir: copies of the currently open data layers are saved here every
62 * PROP_INTERVAL seconds. When a data layer is closed normally, the corresponding
63 * files are removed. If this dir is non-empty on start, JOSM assumes
64 * that it crashed last time.
65 * - deleted layers dir: "secondary archive" - when autosaved layers are restored
66 * they are copied to this directory. We cannot keep them in the autosave folder,
67 * but just deleting it would be dangerous: Maybe a feature inside the file
68 * caused JOSM to crash. If the data is valuable, the user can still try to
69 * open with another versions of JOSM or fix the problem manually.
70 *
71 * The deleted layers dir keeps at most PROP_DELETED_LAYERS files.
72 *
73 * @since 3378 (creation)
74 * @since 10386 (new LayerChangeListener interface)
75 */
76public class AutosaveTask extends TimerTask implements LayerChangeListener, Listener, NoteDataUpdateListener {
77
78 private static final char[] ILLEGAL_CHARACTERS = {'/', '\n', '\r', '\t', '\0', '\f', '`', '?', '*', '\\', '<', '>', '|', '\"', ':'};
79 private static final String AUTOSAVE_DIR = "autosave";
80 private static final String DELETED_LAYERS_DIR = "autosave/deleted_layers";
81
82 /**
83 * If autosave is enabled
84 */
85 public static final BooleanProperty PROP_AUTOSAVE_ENABLED = new BooleanProperty("autosave.enabled", true);
86 /**
87 * The number of files to store per layer
88 */
89 public static final IntegerProperty PROP_FILES_PER_LAYER = new IntegerProperty("autosave.filesPerLayer", 1);
90 /**
91 * How many deleted layers should be stored
92 */
93 public static final IntegerProperty PROP_DELETED_LAYERS = new IntegerProperty("autosave.deletedLayersBackupCount", 5);
94 /**
95 * The autosave interval, in seconds
96 */
97 public static final IntegerProperty PROP_INTERVAL = new IntegerProperty("autosave.interval", (int) TimeUnit.MINUTES.toSeconds(5));
98 /**
99 * The maximum number of autosave files to store
100 */
101 public static final IntegerProperty PROP_INDEX_LIMIT = new IntegerProperty("autosave.index-limit", 1000);
102 /**
103 * Defines if a notification should be displayed after each autosave
104 */
105 public static final BooleanProperty PROP_NOTIFICATION = new BooleanProperty("autosave.notification", false);
106
107 protected static final class AutosaveLayerInfo<T extends AbstractModifiableLayer> {
108 private final T layer;
109 private String layerName;
110 private String layerFileName;
111 private final Deque<File> backupFiles = new LinkedList<>();
112
113 AutosaveLayerInfo(T layer) {
114 this.layer = layer;
115 }
116 }
117
118 private final DataSetListenerAdapter datasetAdapter = new DataSetListenerAdapter(this);
119 private final Set<DataSet> changedDatasets = new HashSet<>();
120 private final Set<NoteData> changedNoteData = new HashSet<>();
121 private final List<AutosaveLayerInfo<?>> layersInfo = new ArrayList<>();
122 private final Object layersLock = new Object();
123 private final Deque<File> deletedLayers = new LinkedList<>();
124
125 private final File autosaveDir = new File(Config.getDirs().getUserDataDirectory(true), AUTOSAVE_DIR);
126 private final File deletedLayersDir = new File(Config.getDirs().getUserDataDirectory(true), DELETED_LAYERS_DIR);
127
128 /**
129 * Replies the autosave directory.
130 * @return the autosave directory
131 * @since 10299
132 */
133 public final Path getAutosaveDir() {
134 return autosaveDir.toPath();
135 }
136
137 /**
138 * Starts the autosave background task.
139 */
140 public void schedule() {
141 if (PROP_INTERVAL.get() > 0) {
142
143 if (!autosaveDir.exists() && !autosaveDir.mkdirs()) {
144 Logging.warn(tr("Unable to create directory {0}, autosave will be disabled", autosaveDir.getAbsolutePath()));
145 return;
146 }
147 if (!deletedLayersDir.exists() && !deletedLayersDir.mkdirs()) {
148 Logging.warn(tr("Unable to create directory {0}, autosave will be disabled", deletedLayersDir.getAbsolutePath()));
149 return;
150 }
151
152 File[] files = deletedLayersDir.listFiles();
153 if (files != null) {
154 for (File f: files) {
155 deletedLayers.add(f); // FIXME: sort by mtime
156 }
157 }
158
159 new Timer(true).schedule(this, TimeUnit.SECONDS.toMillis(1), TimeUnit.SECONDS.toMillis(PROP_INTERVAL.get()));
160 MainApplication.getLayerManager().addAndFireLayerChangeListener(this);
161 }
162 }
163
164 private static String getFileName(String layerName, int index) {
165 String result = layerName;
166 for (char illegalCharacter : ILLEGAL_CHARACTERS) {
167 result = result.replaceAll(Pattern.quote(String.valueOf(illegalCharacter)),
168 '&' + String.valueOf((int) illegalCharacter) + ';');
169 }
170 if (index != 0) {
171 result = result + '_' + index;
172 }
173 return result;
174 }
175
176 private void setLayerFileName(AutosaveLayerInfo<?> layer) {
177 int index = 0;
178 while (true) {
179 String filename = getFileName(layer.layer.getName(), index);
180 boolean foundTheSame = layersInfo.stream().anyMatch(info -> info != layer && filename.equals(info.layerFileName));
181 if (!foundTheSame) {
182 layer.layerFileName = filename;
183 return;
184 }
185
186 index++;
187 }
188 }
189
190 protected File getNewLayerFile(AutosaveLayerInfo<?> layer, Date now, int startIndex) {
191 int index = startIndex;
192 while (true) {
193 String filename = String.format(Locale.ENGLISH, "%1$s_%2$tY%2$tm%2$td_%2$tH%2$tM%2$tS%2$tL%3$s",
194 layer.layerFileName, now, index == 0 ? "" : ('_' + Integer.toString(index)));
195 File result = new File(autosaveDir, filename + '.' +
196 (layer.layer instanceof NoteLayer ?
197 Config.getPref().get("autosave.notes.extension", "osn") :
198 Config.getPref().get("autosave.extension", "osm")));
199 try {
200 if (index > PROP_INDEX_LIMIT.get())
201 throw new IOException("index limit exceeded");
202 if (result.createNewFile()) {
203 createNewPidFile(autosaveDir, filename);
204 return result;
205 } else {
206 Logging.warn(tr("Unable to create file {0}, other filename will be used", result.getAbsolutePath()));
207 }
208 } catch (IOException e) {
209 Logging.log(Logging.LEVEL_ERROR, tr("IOError while creating file, autosave will be skipped: {0}", e.getMessage()), e);
210 return null;
211 }
212 index++;
213 }
214 }
215
216 private static void createNewPidFile(File autosaveDir, String filename) {
217 File pidFile = new File(autosaveDir, filename+".pid");
218 try {
219 final String content = ManagementFactory.getRuntimeMXBean().getName();
220 Files.write(pidFile.toPath(), Collections.singleton(content), StandardCharsets.UTF_8);
221 } catch (IOException | SecurityException t) {
222 Logging.error(t);
223 }
224 }
225
226 private void savelayer(AutosaveLayerInfo<?> info) {
227 if (!info.layer.getName().equals(info.layerName)) {
228 setLayerFileName(info);
229 info.layerName = info.layer.getName();
230 }
231 try {
232 if (info.layer instanceof OsmDataLayer) {
233 OsmDataLayer dataLayer = (OsmDataLayer) info.layer;
234 if (changedDatasets.remove(dataLayer.data)) {
235 File file = getNewLayerFile(info, new Date(), 0);
236 if (file != null) {
237 info.backupFiles.add(file);
238 new OsmExporter().exportData(file, info.layer, true /* no backup with appended ~ */);
239 }
240 }
241 } else if (info.layer instanceof NoteLayer) {
242 NoteLayer noteLayer = (NoteLayer) info.layer;
243 if (changedNoteData.remove(noteLayer.getNoteData())) {
244 File file = getNewLayerFile(info, new Date(), 0);
245 if (file != null) {
246 info.backupFiles.add(file);
247 new NoteExporter().exportData(file, info.layer);
248 }
249 }
250 }
251 } catch (IOException e) {
252 Logging.error(e);
253 }
254 while (info.backupFiles.size() > PROP_FILES_PER_LAYER.get()) {
255 File oldFile = info.backupFiles.remove();
256 if (Utils.deleteFile(oldFile, marktr("Unable to delete old backup file {0}"))) {
257 Utils.deleteFile(getPidFile(oldFile), marktr("Unable to delete old backup file {0}"));
258 }
259 }
260 }
261
262 @Override
263 public void run() {
264 synchronized (layersLock) {
265 try {
266 for (AutosaveLayerInfo<?> info: layersInfo) {
267 savelayer(info);
268 }
269 changedDatasets.clear();
270 changedNoteData.clear();
271 if (PROP_NOTIFICATION.get() && !layersInfo.isEmpty()) {
272 GuiHelper.runInEDT(this::displayNotification);
273 }
274 } catch (RuntimeException t) { // NOPMD
275 // Don't let exception stop time thread
276 Logging.error("Autosave failed:");
277 Logging.error(t);
278 }
279 }
280 }
281
282 protected void displayNotification() {
283 new Notification(tr("Your work has been saved automatically."))
284 .setDuration(Notification.TIME_SHORT)
285 .show();
286 }
287
288 @Override
289 public void layerOrderChanged(LayerOrderChangeEvent e) {
290 // Do nothing
291 }
292
293 private void registerNewlayer(OsmDataLayer layer) {
294 synchronized (layersLock) {
295 layer.getDataSet().addDataSetListener(datasetAdapter);
296 layersInfo.add(new AutosaveLayerInfo<>(layer));
297 }
298 }
299
300 private void registerNewlayer(NoteLayer layer) {
301 synchronized (layersLock) {
302 layer.getNoteData().addNoteDataUpdateListener(this);
303 layersInfo.add(new AutosaveLayerInfo<>(layer));
304 }
305 }
306
307 @Override
308 public void layerAdded(LayerAddEvent e) {
309 if (e.getAddedLayer() instanceof OsmDataLayer) {
310 registerNewlayer((OsmDataLayer) e.getAddedLayer());
311 } else if (e.getAddedLayer() instanceof NoteLayer) {
312 registerNewlayer((NoteLayer) e.getAddedLayer());
313 }
314 }
315
316 @Override
317 public void layerRemoving(LayerRemoveEvent e) {
318 if (e.getRemovedLayer() instanceof OsmDataLayer) {
319 synchronized (layersLock) {
320 OsmDataLayer osmLayer = (OsmDataLayer) e.getRemovedLayer();
321 osmLayer.getDataSet().removeDataSetListener(datasetAdapter);
322 cleanupLayer(osmLayer);
323 }
324 } else if (e.getRemovedLayer() instanceof NoteLayer) {
325 synchronized (layersLock) {
326 NoteLayer noteLayer = (NoteLayer) e.getRemovedLayer();
327 noteLayer.getNoteData().removeNoteDataUpdateListener(this);
328 cleanupLayer(noteLayer);
329 }
330 }
331 }
332
333 private void cleanupLayer(AbstractModifiableLayer removedLayer) {
334 Iterator<AutosaveLayerInfo<?>> it = layersInfo.iterator();
335 while (it.hasNext()) {
336 AutosaveLayerInfo<?> info = it.next();
337 if (info.layer == removedLayer) {
338
339 savelayer(info);
340 File lastFile = info.backupFiles.pollLast();
341 if (lastFile != null) {
342 moveToDeletedLayersFolder(lastFile);
343 }
344 for (File file: info.backupFiles) {
345 if (Utils.deleteFile(file)) {
346 Utils.deleteFile(getPidFile(file));
347 }
348 }
349
350 it.remove();
351 }
352 }
353 }
354
355 @Override
356 public void processDatasetEvent(AbstractDatasetChangedEvent event) {
357 changedDatasets.add(event.getDataset());
358 }
359
360 @Override
361 public void noteDataUpdated(NoteData data) {
362 changedNoteData.add(data);
363 }
364
365 @Override
366 public void selectedNoteChanged(NoteData noteData) {
367 // Do nothing
368 }
369
370 protected File getPidFile(File osmFile) {
371 return new File(autosaveDir, osmFile.getName().replaceFirst("[.][^.]+$", ".pid"));
372 }
373
374 /**
375 * Replies the list of .osm files still present in autosave dir, that are not currently managed by another instance of JOSM.
376 * These files are hence unsaved layers from an old instance of JOSM that crashed and may be recovered by this instance.
377 * @return The list of .osm files still present in autosave dir, that are not currently managed by another instance of JOSM
378 */
379 public List<File> getUnsavedLayersFiles() {
380 List<File> result = new ArrayList<>();
381 try {
382 File[] files = autosaveDir.listFiles((FileFilter)
383 pathname -> OsmImporter.FILE_FILTER.accept(pathname) || NoteImporter.FILE_FILTER.accept(pathname));
384 if (files == null)
385 return result;
386 for (File file: files) {
387 if (file.isFile()) {
388 boolean skipFile = false;
389 File pidFile = getPidFile(file);
390 if (pidFile.exists()) {
391 try (BufferedReader reader = Files.newBufferedReader(pidFile.toPath(), StandardCharsets.UTF_8)) {
392 String jvmId = reader.readLine();
393 if (jvmId != null) {
394 String pid = jvmId.split("@")[0];
395 skipFile = jvmPerfDataFileExists(pid);
396 }
397 } catch (IOException | SecurityException t) {
398 Logging.error(t);
399 }
400 }
401 if (!skipFile) {
402 result.add(file);
403 }
404 }
405 }
406 } catch (SecurityException e) {
407 Logging.log(Logging.LEVEL_ERROR, "Unable to list unsaved layers files", e);
408 }
409 return result;
410 }
411
412 private static boolean jvmPerfDataFileExists(final String jvmId) {
413 File jvmDir = new File(getSystemProperty("java.io.tmpdir") + File.separator + "hsperfdata_" + getSystemProperty("user.name"));
414 if (jvmDir.exists() && jvmDir.canRead()) {
415 File[] files = jvmDir.listFiles((FileFilter) file -> file.getName().equals(jvmId) && file.isFile());
416 return files != null && files.length == 1;
417 }
418 return false;
419 }
420
421 /**
422 * Recover the unsaved layers and open them asynchronously.
423 * @return A future that can be used to wait for the completion of this task.
424 */
425 public Future<?> recoverUnsavedLayers() {
426 List<File> files = getUnsavedLayersFiles();
427 final OpenFileTask openFileTsk = new OpenFileTask(files, null, tr("Restoring files"));
428 final Future<?> openFilesFuture = MainApplication.worker.submit(openFileTsk);
429 return MainApplication.worker.submit(() -> {
430 try {
431 // Wait for opened tasks to be generated.
432 openFilesFuture.get();
433 for (File f: openFileTsk.getSuccessfullyOpenedFiles()) {
434 moveToDeletedLayersFolder(f);
435 }
436 } catch (InterruptedException | ExecutionException e) {
437 Logging.error(e);
438 }
439 });
440 }
441
442 /**
443 * Move file to the deleted layers directory.
444 * If moving does not work, it will try to delete the file directly.
445 * Afterwards, if the number of deleted layers gets larger than PROP_DELETED_LAYERS,
446 * some files in the deleted layers directory will be removed.
447 *
448 * @param f the file, usually from the autosave dir
449 */
450 private void moveToDeletedLayersFolder(File f) {
451 File backupFile = new File(deletedLayersDir, f.getName());
452 File pidFile = getPidFile(f);
453
454 if (backupFile.exists()) {
455 deletedLayers.remove(backupFile);
456 Utils.deleteFile(backupFile, marktr("Unable to delete old backup file {0}"));
457 }
458 if (f.renameTo(backupFile)) {
459 deletedLayers.add(backupFile);
460 Utils.deleteFile(pidFile);
461 } else {
462 Logging.warn(String.format("Could not move autosaved file %s to %s folder", f.getName(), deletedLayersDir.getName()));
463 // we cannot move to deleted folder, so just try to delete it directly
464 if (Utils.deleteFile(f, marktr("Unable to delete backup file {0}"))) {
465 Utils.deleteFile(pidFile, marktr("Unable to delete PID file {0}"));
466 }
467 }
468 while (deletedLayers.size() > PROP_DELETED_LAYERS.get()) {
469 File next = deletedLayers.remove();
470 if (next == null) {
471 break;
472 }
473 Utils.deleteFile(next, marktr("Unable to delete archived backup file {0}"));
474 }
475 }
476
477 /**
478 * Mark all unsaved layers as deleted. They are still preserved in the deleted layers folder.
479 */
480 public void discardUnsavedLayers() {
481 for (File f: getUnsavedLayersFiles()) {
482 moveToDeletedLayersFolder(f);
483 }
484 }
485}
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