Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server.am; |
| 18 | |
| 19 | import android.graphics.Bitmap; |
| 20 | import android.graphics.BitmapFactory; |
| 21 | import android.os.Debug; |
| 22 | import android.os.SystemClock; |
| 23 | import android.util.ArraySet; |
| 24 | import android.util.AtomicFile; |
| 25 | import android.util.Slog; |
| 26 | import android.util.Xml; |
| 27 | import com.android.internal.util.FastXmlSerializer; |
| 28 | import com.android.internal.util.XmlUtils; |
| 29 | import org.xmlpull.v1.XmlPullParser; |
| 30 | import org.xmlpull.v1.XmlPullParserException; |
| 31 | import org.xmlpull.v1.XmlSerializer; |
| 32 | |
| 33 | import java.io.BufferedReader; |
| 34 | import java.io.File; |
| 35 | import java.io.FileOutputStream; |
| 36 | import java.io.FileReader; |
| 37 | import java.io.IOException; |
| 38 | import java.io.StringWriter; |
| 39 | import java.util.ArrayList; |
| 40 | import java.util.Arrays; |
| 41 | import java.util.Comparator; |
| 42 | |
| 43 | public class TaskPersister { |
| 44 | static final String TAG = "TaskPersister"; |
| 45 | static final boolean DEBUG = false; |
| 46 | |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 47 | /** When not flushing don't write out files faster than this */ |
| 48 | private static final long INTER_WRITE_DELAY_MS = 500; |
| 49 | |
| 50 | /** When not flushing delay this long before writing the first file out. This gives the next |
| 51 | * task being launched a chance to load its resources without this occupying IO bandwidth. */ |
| 52 | private static final long PRE_TASK_DELAY_MS = 3000; |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 53 | |
| 54 | private static final String RECENTS_FILENAME = "_task"; |
| 55 | private static final String TASKS_DIRNAME = "recent_tasks"; |
| 56 | private static final String TASK_EXTENSION = ".xml"; |
| 57 | private static final String IMAGES_DIRNAME = "recent_images"; |
Craig Mautner | c0ffce5 | 2014-07-01 12:38:52 -0700 | [diff] [blame] | 58 | static final String IMAGE_EXTENSION = ".png"; |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 59 | |
| 60 | private static final String TAG_TASK = "task"; |
| 61 | |
Craig Mautner | c0ffce5 | 2014-07-01 12:38:52 -0700 | [diff] [blame] | 62 | static File sImagesDir; |
| 63 | static File sTasksDir; |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 64 | |
| 65 | private final ActivityManagerService mService; |
| 66 | private final ActivityStackSupervisor mStackSupervisor; |
| 67 | |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 68 | /** Value determines write delay mode as follows: |
| 69 | * < 0 We are Flushing. No delays between writes until the image queue is drained and all |
| 70 | * tasks needing persisting are written to disk. There is no delay between writes. |
| 71 | * == 0 We are Idle. Next writes will be delayed by #PRE_TASK_DELAY_MS. |
| 72 | * > 0 We are Actively writing. Next write will be at this time. Subsequent writes will be |
| 73 | * delayed by #INTER_WRITE_DELAY_MS. */ |
| 74 | private long mNextWriteTime = 0; |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 75 | |
| 76 | private final LazyTaskWriterThread mLazyTaskWriterThread; |
| 77 | |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 78 | private static class WriteQueueItem {} |
| 79 | private static class TaskWriteQueueItem extends WriteQueueItem { |
| 80 | final TaskRecord mTask; |
| 81 | TaskWriteQueueItem(TaskRecord task) { |
| 82 | mTask = task; |
| 83 | } |
| 84 | } |
| 85 | private static class ImageWriteQueueItem extends WriteQueueItem { |
| 86 | final String mFilename; |
| 87 | Bitmap mImage; |
| 88 | ImageWriteQueueItem(String filename, Bitmap image) { |
| 89 | mFilename = filename; |
| 90 | mImage = image; |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | ArrayList<WriteQueueItem> mWriteQueue = new ArrayList<WriteQueueItem>(); |
| 95 | |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 96 | TaskPersister(File systemDir, ActivityStackSupervisor stackSupervisor) { |
| 97 | sTasksDir = new File(systemDir, TASKS_DIRNAME); |
| 98 | if (!sTasksDir.exists()) { |
Craig Mautner | 43e52ed | 2014-06-16 17:18:52 -0700 | [diff] [blame] | 99 | if (DEBUG) Slog.d(TAG, "Creating tasks directory " + sTasksDir); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 100 | if (!sTasksDir.mkdir()) { |
| 101 | Slog.e(TAG, "Failure creating tasks directory " + sTasksDir); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | sImagesDir = new File(systemDir, IMAGES_DIRNAME); |
| 106 | if (!sImagesDir.exists()) { |
Craig Mautner | 43e52ed | 2014-06-16 17:18:52 -0700 | [diff] [blame] | 107 | if (DEBUG) Slog.d(TAG, "Creating images directory " + sTasksDir); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 108 | if (!sImagesDir.mkdir()) { |
| 109 | Slog.e(TAG, "Failure creating images directory " + sImagesDir); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | mStackSupervisor = stackSupervisor; |
| 114 | mService = stackSupervisor.mService; |
| 115 | |
| 116 | mLazyTaskWriterThread = new LazyTaskWriterThread("LazyTaskWriterThread"); |
| 117 | } |
| 118 | |
| 119 | void startPersisting() { |
| 120 | mLazyTaskWriterThread.start(); |
| 121 | } |
| 122 | |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 123 | void wakeup(TaskRecord task, boolean flush) { |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 124 | synchronized (this) { |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 125 | if (task != null) { |
| 126 | int queueNdx; |
| 127 | for (queueNdx = mWriteQueue.size() - 1; queueNdx >= 0; --queueNdx) { |
| 128 | final WriteQueueItem item = mWriteQueue.get(queueNdx); |
| 129 | if (item instanceof TaskWriteQueueItem && |
| 130 | ((TaskWriteQueueItem) item).mTask == task) { |
| 131 | break; |
| 132 | } |
| 133 | } |
| 134 | if (queueNdx < 0) { |
| 135 | mWriteQueue.add(new TaskWriteQueueItem(task)); |
| 136 | } |
| 137 | } else { |
| 138 | // Dummy. |
| 139 | mWriteQueue.add(new WriteQueueItem()); |
| 140 | } |
| 141 | if (flush) { |
| 142 | mNextWriteTime = -1; |
| 143 | } else if (mNextWriteTime == 0) { |
| 144 | mNextWriteTime = SystemClock.uptimeMillis() + PRE_TASK_DELAY_MS; |
| 145 | } |
| 146 | if (DEBUG) Slog.d(TAG, "wakeup: task=" + task + " flush=" + flush + " mNextWriteTime=" |
| 147 | + mNextWriteTime + " Callers=" + Debug.getCallers(4)); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 148 | notifyAll(); |
| 149 | } |
| 150 | } |
| 151 | |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 152 | void saveImage(Bitmap image, String filename) { |
| 153 | synchronized (this) { |
| 154 | int queueNdx; |
| 155 | for (queueNdx = mWriteQueue.size() - 1; queueNdx >= 0; --queueNdx) { |
| 156 | final WriteQueueItem item = mWriteQueue.get(queueNdx); |
| 157 | if (item instanceof ImageWriteQueueItem) { |
| 158 | ImageWriteQueueItem imageWriteQueueItem = (ImageWriteQueueItem) item; |
| 159 | if (imageWriteQueueItem.mFilename.equals(filename)) { |
| 160 | // replace the Bitmap with the new one. |
| 161 | imageWriteQueueItem.mImage = image; |
| 162 | break; |
| 163 | } |
| 164 | } |
| 165 | } |
| 166 | if (queueNdx < 0) { |
| 167 | mWriteQueue.add(new ImageWriteQueueItem(filename, image)); |
| 168 | } |
| 169 | if (mNextWriteTime == 0) { |
| 170 | mNextWriteTime = SystemClock.uptimeMillis() + PRE_TASK_DELAY_MS; |
| 171 | } |
| 172 | if (DEBUG) Slog.d(TAG, "saveImage: filename=" + filename + " now=" + |
| 173 | SystemClock.uptimeMillis() + " mNextWriteTime=" + |
| 174 | mNextWriteTime + " Callers=" + Debug.getCallers(4)); |
| 175 | notifyAll(); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | Bitmap getThumbnail(String filename) { |
| 180 | synchronized (this) { |
| 181 | for (int queueNdx = mWriteQueue.size() - 1; queueNdx >= 0; --queueNdx) { |
| 182 | final WriteQueueItem item = mWriteQueue.get(queueNdx); |
| 183 | if (item instanceof ImageWriteQueueItem) { |
| 184 | ImageWriteQueueItem imageWriteQueueItem = (ImageWriteQueueItem) item; |
| 185 | if (imageWriteQueueItem.mFilename.equals(filename)) { |
| 186 | return imageWriteQueueItem.mImage; |
| 187 | } |
| 188 | } |
| 189 | } |
| 190 | return null; |
| 191 | } |
| 192 | } |
| 193 | |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 194 | private StringWriter saveToXml(TaskRecord task) throws IOException, XmlPullParserException { |
| 195 | if (DEBUG) Slog.d(TAG, "saveToXml: task=" + task); |
| 196 | final XmlSerializer xmlSerializer = new FastXmlSerializer(); |
| 197 | StringWriter stringWriter = new StringWriter(); |
| 198 | xmlSerializer.setOutput(stringWriter); |
| 199 | |
| 200 | if (DEBUG) xmlSerializer.setFeature( |
| 201 | "http://xmlpull.org/v1/doc/features.html#indent-output", true); |
| 202 | |
| 203 | // save task |
| 204 | xmlSerializer.startDocument(null, true); |
| 205 | |
| 206 | xmlSerializer.startTag(null, TAG_TASK); |
| 207 | task.saveToXml(xmlSerializer); |
| 208 | xmlSerializer.endTag(null, TAG_TASK); |
| 209 | |
| 210 | xmlSerializer.endDocument(); |
| 211 | xmlSerializer.flush(); |
| 212 | |
| 213 | return stringWriter; |
| 214 | } |
| 215 | |
Craig Mautner | 77b0426 | 2014-06-27 15:22:12 -0700 | [diff] [blame] | 216 | private String fileToString(File file) { |
| 217 | final String newline = System.lineSeparator(); |
| 218 | try { |
| 219 | BufferedReader reader = new BufferedReader(new FileReader(file)); |
| 220 | StringBuffer sb = new StringBuffer((int) file.length() * 2); |
| 221 | String line; |
| 222 | while ((line = reader.readLine()) != null) { |
| 223 | sb.append(line + newline); |
| 224 | } |
| 225 | reader.close(); |
| 226 | return sb.toString(); |
| 227 | } catch (IOException ioe) { |
| 228 | Slog.e(TAG, "Couldn't read file " + file.getName()); |
| 229 | return null; |
| 230 | } |
| 231 | } |
| 232 | |
Craig Mautner | a228ae9 | 2014-07-09 05:44:55 -0700 | [diff] [blame] | 233 | private TaskRecord taskIdToTask(int taskId, ArrayList<TaskRecord> tasks) { |
| 234 | if (taskId < 0) { |
| 235 | return null; |
| 236 | } |
| 237 | for (int taskNdx = tasks.size() - 1; taskNdx >= 0; --taskNdx) { |
| 238 | final TaskRecord task = tasks.get(taskNdx); |
| 239 | if (task.taskId == taskId) { |
| 240 | return task; |
| 241 | } |
| 242 | } |
| 243 | Slog.e(TAG, "Restore affiliation error looking for taskId=" + taskId); |
| 244 | return null; |
| 245 | } |
| 246 | |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 247 | ArrayList<TaskRecord> restoreTasksLocked() { |
| 248 | final ArrayList<TaskRecord> tasks = new ArrayList<TaskRecord>(); |
| 249 | ArraySet<Integer> recoveredTaskIds = new ArraySet<Integer>(); |
| 250 | |
| 251 | File[] recentFiles = sTasksDir.listFiles(); |
| 252 | if (recentFiles == null) { |
| 253 | Slog.e(TAG, "Unable to list files from " + sTasksDir); |
| 254 | return tasks; |
| 255 | } |
| 256 | |
| 257 | for (int taskNdx = 0; taskNdx < recentFiles.length; ++taskNdx) { |
| 258 | File taskFile = recentFiles[taskNdx]; |
| 259 | if (DEBUG) Slog.d(TAG, "restoreTasksLocked: taskFile=" + taskFile.getName()); |
| 260 | BufferedReader reader = null; |
Craig Mautner | e0129b3 | 2014-05-25 16:41:09 -0700 | [diff] [blame] | 261 | boolean deleteFile = false; |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 262 | try { |
| 263 | reader = new BufferedReader(new FileReader(taskFile)); |
| 264 | final XmlPullParser in = Xml.newPullParser(); |
| 265 | in.setInput(reader); |
| 266 | |
| 267 | int event; |
| 268 | while (((event = in.next()) != XmlPullParser.END_DOCUMENT) && |
| 269 | event != XmlPullParser.END_TAG) { |
| 270 | final String name = in.getName(); |
| 271 | if (event == XmlPullParser.START_TAG) { |
| 272 | if (DEBUG) Slog.d(TAG, "restoreTasksLocked: START_TAG name=" + name); |
| 273 | if (TAG_TASK.equals(name)) { |
| 274 | final TaskRecord task = |
| 275 | TaskRecord.restoreFromXml(in, mStackSupervisor); |
Dianne Hackborn | 852975d | 2014-08-22 17:42:43 -0700 | [diff] [blame] | 276 | if (DEBUG) Slog.d(TAG, "restoreTasksLocked: restored task=" + |
Craig Mautner | 77b0426 | 2014-06-27 15:22:12 -0700 | [diff] [blame] | 277 | task); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 278 | if (task != null) { |
Craig Mautner | 43e52ed | 2014-06-16 17:18:52 -0700 | [diff] [blame] | 279 | task.isPersistable = true; |
Dianne Hackborn | 852975d | 2014-08-22 17:42:43 -0700 | [diff] [blame] | 280 | // XXX Don't add to write queue... there is no reason to write |
| 281 | // out the stuff we just read, if we don't write it we will |
| 282 | // read the same thing again. |
| 283 | //mWriteQueue.add(new TaskWriteQueueItem(task)); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 284 | tasks.add(task); |
| 285 | final int taskId = task.taskId; |
| 286 | recoveredTaskIds.add(taskId); |
| 287 | mStackSupervisor.setNextTaskId(taskId); |
Craig Mautner | 77b0426 | 2014-06-27 15:22:12 -0700 | [diff] [blame] | 288 | } else { |
| 289 | Slog.e(TAG, "Unable to restore taskFile=" + taskFile + ": " + |
| 290 | fileToString(taskFile)); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 291 | } |
| 292 | } else { |
Craig Mautner | 43e52ed | 2014-06-16 17:18:52 -0700 | [diff] [blame] | 293 | Slog.wtf(TAG, "restoreTasksLocked Unknown xml event=" + event + |
| 294 | " name=" + name); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 295 | } |
| 296 | } |
| 297 | XmlUtils.skipCurrentTag(in); |
| 298 | } |
Craig Mautner | e0129b3 | 2014-05-25 16:41:09 -0700 | [diff] [blame] | 299 | } catch (Exception e) { |
Craig Mautner | a228ae9 | 2014-07-09 05:44:55 -0700 | [diff] [blame] | 300 | Slog.wtf(TAG, "Unable to parse " + taskFile + ". Error ", e); |
Craig Mautner | 77b0426 | 2014-06-27 15:22:12 -0700 | [diff] [blame] | 301 | Slog.e(TAG, "Failing file: " + fileToString(taskFile)); |
Craig Mautner | e0129b3 | 2014-05-25 16:41:09 -0700 | [diff] [blame] | 302 | deleteFile = true; |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 303 | } finally { |
| 304 | if (reader != null) { |
| 305 | try { |
| 306 | reader.close(); |
| 307 | } catch (IOException e) { |
| 308 | } |
| 309 | } |
Craig Mautner | e0129b3 | 2014-05-25 16:41:09 -0700 | [diff] [blame] | 310 | if (!DEBUG && deleteFile) { |
Craig Mautner | 77b0426 | 2014-06-27 15:22:12 -0700 | [diff] [blame] | 311 | if (true || DEBUG) Slog.d(TAG, "Deleting file=" + taskFile.getName()); |
Craig Mautner | e0129b3 | 2014-05-25 16:41:09 -0700 | [diff] [blame] | 312 | taskFile.delete(); |
| 313 | } |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 314 | } |
| 315 | } |
| 316 | |
| 317 | if (!DEBUG) { |
| 318 | removeObsoleteFiles(recoveredTaskIds); |
| 319 | } |
| 320 | |
Craig Mautner | a228ae9 | 2014-07-09 05:44:55 -0700 | [diff] [blame] | 321 | // Fixup task affiliation from taskIds |
| 322 | for (int taskNdx = tasks.size() - 1; taskNdx >= 0; --taskNdx) { |
| 323 | final TaskRecord task = tasks.get(taskNdx); |
| 324 | task.setPrevAffiliate(taskIdToTask(task.mPrevAffiliateTaskId, tasks)); |
| 325 | task.setNextAffiliate(taskIdToTask(task.mNextAffiliateTaskId, tasks)); |
| 326 | } |
| 327 | |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 328 | TaskRecord[] tasksArray = new TaskRecord[tasks.size()]; |
| 329 | tasks.toArray(tasksArray); |
| 330 | Arrays.sort(tasksArray, new Comparator<TaskRecord>() { |
| 331 | @Override |
| 332 | public int compare(TaskRecord lhs, TaskRecord rhs) { |
Craig Mautner | 43e52ed | 2014-06-16 17:18:52 -0700 | [diff] [blame] | 333 | final long diff = rhs.mLastTimeMoved - lhs.mLastTimeMoved; |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 334 | if (diff < 0) { |
| 335 | return -1; |
| 336 | } else if (diff > 0) { |
| 337 | return +1; |
| 338 | } else { |
| 339 | return 0; |
| 340 | } |
| 341 | } |
| 342 | }); |
| 343 | |
| 344 | return new ArrayList<TaskRecord>(Arrays.asList(tasksArray)); |
| 345 | } |
| 346 | |
Craig Mautner | e0129b3 | 2014-05-25 16:41:09 -0700 | [diff] [blame] | 347 | private static void removeObsoleteFiles(ArraySet<Integer> persistentTaskIds, File[] files) { |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 348 | if (DEBUG) Slog.d(TAG, "removeObsoleteFile: persistentTaskIds=" + persistentTaskIds + |
| 349 | " files=" + files); |
Craig Mautner | a5badf0 | 2014-09-11 12:47:03 -0700 | [diff] [blame^] | 350 | if (files == null) { |
| 351 | Slog.e(TAG, "File error accessing recents directory (too many files open?)."); |
| 352 | return; |
| 353 | } |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 354 | for (int fileNdx = 0; fileNdx < files.length; ++fileNdx) { |
| 355 | File file = files[fileNdx]; |
| 356 | String filename = file.getName(); |
Craig Mautner | ffcfcaa | 2014-06-05 09:54:38 -0700 | [diff] [blame] | 357 | final int taskIdEnd = filename.indexOf('_'); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 358 | if (taskIdEnd > 0) { |
| 359 | final int taskId; |
| 360 | try { |
| 361 | taskId = Integer.valueOf(filename.substring(0, taskIdEnd)); |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 362 | if (DEBUG) Slog.d(TAG, "removeObsoleteFile: Found taskId=" + taskId); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 363 | } catch (Exception e) { |
Craig Mautner | 43e52ed | 2014-06-16 17:18:52 -0700 | [diff] [blame] | 364 | Slog.wtf(TAG, "removeObsoleteFile: Can't parse file=" + file.getName()); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 365 | file.delete(); |
| 366 | continue; |
| 367 | } |
| 368 | if (!persistentTaskIds.contains(taskId)) { |
Craig Mautner | 77b0426 | 2014-06-27 15:22:12 -0700 | [diff] [blame] | 369 | if (true || DEBUG) Slog.d(TAG, "removeObsoleteFile: deleting file=" + |
| 370 | file.getName()); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 371 | file.delete(); |
| 372 | } |
| 373 | } |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | private void removeObsoleteFiles(ArraySet<Integer> persistentTaskIds) { |
| 378 | removeObsoleteFiles(persistentTaskIds, sTasksDir.listFiles()); |
| 379 | removeObsoleteFiles(persistentTaskIds, sImagesDir.listFiles()); |
| 380 | } |
| 381 | |
| 382 | static Bitmap restoreImage(String filename) { |
| 383 | if (DEBUG) Slog.d(TAG, "restoreImage: restoring " + filename); |
Craig Mautner | c0ffce5 | 2014-07-01 12:38:52 -0700 | [diff] [blame] | 384 | return BitmapFactory.decodeFile(sImagesDir + File.separator + filename); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | private class LazyTaskWriterThread extends Thread { |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 388 | |
| 389 | LazyTaskWriterThread(String name) { |
| 390 | super(name); |
| 391 | } |
| 392 | |
| 393 | @Override |
| 394 | public void run() { |
| 395 | ArraySet<Integer> persistentTaskIds = new ArraySet<Integer>(); |
| 396 | while (true) { |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 397 | // We can't lock mService while holding TaskPersister.this, but we don't want to |
| 398 | // call removeObsoleteFiles every time through the loop, only the last time before |
| 399 | // going to sleep. The risk is that we call removeObsoleteFiles() successively. |
| 400 | final boolean probablyDone; |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 401 | synchronized (TaskPersister.this) { |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 402 | probablyDone = mWriteQueue.isEmpty(); |
| 403 | } |
| 404 | if (probablyDone) { |
| 405 | if (DEBUG) Slog.d(TAG, "Looking for obsolete files."); |
| 406 | persistentTaskIds.clear(); |
| 407 | synchronized (mService) { |
| 408 | final ArrayList<TaskRecord> tasks = mService.mRecentTasks; |
| 409 | if (DEBUG) Slog.d(TAG, "mRecents=" + tasks); |
| 410 | for (int taskNdx = tasks.size() - 1; taskNdx >= 0; --taskNdx) { |
| 411 | final TaskRecord task = tasks.get(taskNdx); |
| 412 | if (DEBUG) Slog.d(TAG, "LazyTaskWriter: task=" + task + " persistable=" + |
| 413 | task.isPersistable); |
| 414 | if (task.isPersistable && !task.stack.isHomeStack()) { |
| 415 | if (DEBUG) Slog.d(TAG, "adding to persistentTaskIds task=" + task); |
| 416 | persistentTaskIds.add(task.taskId); |
| 417 | } else { |
| 418 | if (DEBUG) Slog.d(TAG, "omitting from persistentTaskIds task=" + task); |
| 419 | } |
| 420 | } |
| 421 | } |
| 422 | removeObsoleteFiles(persistentTaskIds); |
| 423 | } |
| 424 | |
| 425 | // If mNextWriteTime, then don't delay between each call to saveToXml(). |
| 426 | final WriteQueueItem item; |
| 427 | synchronized (TaskPersister.this) { |
| 428 | if (mNextWriteTime >= 0) { |
| 429 | // The next write we don't have to wait so long. |
| 430 | mNextWriteTime = SystemClock.uptimeMillis() + INTER_WRITE_DELAY_MS; |
| 431 | if (DEBUG) Slog.d(TAG, "Next write time may be in " + |
| 432 | INTER_WRITE_DELAY_MS + " msec. (" + mNextWriteTime + ")"); |
| 433 | } |
| 434 | |
| 435 | while (mWriteQueue.isEmpty()) { |
| 436 | mNextWriteTime = 0; // idle. |
| 437 | try { |
| 438 | if (DEBUG) Slog.d(TAG, "LazyTaskWriter: waiting indefinitely."); |
| 439 | TaskPersister.this.wait(); |
| 440 | } catch (InterruptedException e) { |
| 441 | } |
| 442 | // Invariant: mNextWriteTime is either -1 or PRE_WRITE_DELAY_MS from now. |
| 443 | } |
| 444 | item = mWriteQueue.remove(0); |
| 445 | |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 446 | long now = SystemClock.uptimeMillis(); |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 447 | if (DEBUG) Slog.d(TAG, "LazyTaskWriter: now=" + now + " mNextWriteTime=" + |
| 448 | mNextWriteTime); |
| 449 | while (now < mNextWriteTime) { |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 450 | try { |
| 451 | if (DEBUG) Slog.d(TAG, "LazyTaskWriter: waiting " + |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 452 | (mNextWriteTime - now)); |
| 453 | TaskPersister.this.wait(mNextWriteTime - now); |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 454 | } catch (InterruptedException e) { |
| 455 | } |
| 456 | now = SystemClock.uptimeMillis(); |
| 457 | } |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 458 | |
| 459 | // Got something to do. |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 460 | } |
| 461 | |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 462 | if (item instanceof ImageWriteQueueItem) { |
| 463 | ImageWriteQueueItem imageWriteQueueItem = (ImageWriteQueueItem) item; |
| 464 | final String filename = imageWriteQueueItem.mFilename; |
| 465 | final Bitmap bitmap = imageWriteQueueItem.mImage; |
| 466 | if (DEBUG) Slog.d(TAG, "writing bitmap: filename=" + filename); |
Craig Mautner | c0ffce5 | 2014-07-01 12:38:52 -0700 | [diff] [blame] | 467 | FileOutputStream imageFile = null; |
| 468 | try { |
| 469 | imageFile = new FileOutputStream(new File(sImagesDir, filename)); |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 470 | bitmap.compress(Bitmap.CompressFormat.PNG, 100, imageFile); |
Craig Mautner | c0ffce5 | 2014-07-01 12:38:52 -0700 | [diff] [blame] | 471 | } catch (Exception e) { |
| 472 | Slog.e(TAG, "saveImage: unable to save " + filename, e); |
| 473 | } finally { |
| 474 | if (imageFile != null) { |
| 475 | try { |
| 476 | imageFile.close(); |
| 477 | } catch (IOException e) { |
| 478 | } |
| 479 | } |
| 480 | } |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 481 | } else if (item instanceof TaskWriteQueueItem) { |
| 482 | // Write out one task. |
| 483 | StringWriter stringWriter = null; |
| 484 | TaskRecord task = ((TaskWriteQueueItem) item).mTask; |
| 485 | if (DEBUG) Slog.d(TAG, "Writing task=" + task); |
| 486 | synchronized (mService) { |
| 487 | if (mService.mRecentTasks.contains(task)) { |
| 488 | // Still there. |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 489 | try { |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 490 | if (DEBUG) Slog.d(TAG, "Saving task=" + task); |
| 491 | stringWriter = saveToXml(task); |
| 492 | } catch (IOException e) { |
| 493 | } catch (XmlPullParserException e) { |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 494 | } |
| 495 | } |
Dianne Hackborn | 852975d | 2014-08-22 17:42:43 -0700 | [diff] [blame] | 496 | } |
| 497 | if (stringWriter != null) { |
| 498 | // Write out xml file while not holding mService lock. |
| 499 | FileOutputStream file = null; |
| 500 | AtomicFile atomicFile = null; |
| 501 | try { |
| 502 | atomicFile = new AtomicFile(new File(sTasksDir, String.valueOf( |
| 503 | task.taskId) + RECENTS_FILENAME + TASK_EXTENSION)); |
| 504 | file = atomicFile.startWrite(); |
| 505 | file.write(stringWriter.toString().getBytes()); |
| 506 | file.write('\n'); |
| 507 | atomicFile.finishWrite(file); |
| 508 | } catch (IOException e) { |
| 509 | if (file != null) { |
| 510 | atomicFile.failWrite(file); |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 511 | } |
Dianne Hackborn | 852975d | 2014-08-22 17:42:43 -0700 | [diff] [blame] | 512 | Slog.e(TAG, "Unable to open " + atomicFile + " for persisting. " + |
| 513 | e); |
Craig Mautner | f4f8bb7 | 2014-07-29 10:41:40 -0700 | [diff] [blame] | 514 | } |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 515 | } |
| 516 | } |
Craig Mautner | 21d24a2 | 2014-04-23 11:45:37 -0700 | [diff] [blame] | 517 | } |
| 518 | } |
| 519 | } |
| 520 | } |