| /** |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy |
| * of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package com.android.server.usage; |
| |
| import android.app.usage.TimeSparseArray; |
| import android.app.usage.UsageStats; |
| import android.app.usage.UsageStatsManager; |
| import android.os.Build; |
| import android.os.SystemProperties; |
| import android.util.AtomicFile; |
| import android.util.Slog; |
| import android.util.TimeUtils; |
| |
| import java.io.BufferedReader; |
| import java.io.BufferedWriter; |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.File; |
| import java.io.FileReader; |
| import java.io.FileWriter; |
| import java.io.FilenameFilter; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Provides an interface to query for UsageStat data from an XML database. |
| */ |
| class UsageStatsDatabase { |
| private static final int CURRENT_VERSION = 3; |
| |
| // Current version of the backup schema |
| static final int BACKUP_VERSION = 1; |
| |
| // Key under which the payload blob is stored |
| // same as UsageStatsBackupHelper.KEY_USAGE_STATS |
| static final String KEY_USAGE_STATS = "usage_stats"; |
| |
| |
| private static final String TAG = "UsageStatsDatabase"; |
| private static final boolean DEBUG = UsageStatsService.DEBUG; |
| private static final String BAK_SUFFIX = ".bak"; |
| private static final String CHECKED_IN_SUFFIX = UsageStatsXml.CHECKED_IN_SUFFIX; |
| private static final String RETENTION_LEN_KEY = "ro.usagestats.chooser.retention"; |
| private static final int SELECTION_LOG_RETENTION_LEN = |
| SystemProperties.getInt(RETENTION_LEN_KEY, 14); |
| |
| private final Object mLock = new Object(); |
| private final File[] mIntervalDirs; |
| private final TimeSparseArray<AtomicFile>[] mSortedStatFiles; |
| private final UnixCalendar mCal; |
| private final File mVersionFile; |
| private boolean mFirstUpdate; |
| private boolean mNewUpdate; |
| |
| public UsageStatsDatabase(File dir) { |
| mIntervalDirs = new File[] { |
| new File(dir, "daily"), |
| new File(dir, "weekly"), |
| new File(dir, "monthly"), |
| new File(dir, "yearly"), |
| }; |
| mVersionFile = new File(dir, "version"); |
| mSortedStatFiles = new TimeSparseArray[mIntervalDirs.length]; |
| mCal = new UnixCalendar(0); |
| } |
| |
| /** |
| * Initialize any directories required and index what stats are available. |
| */ |
| public void init(long currentTimeMillis) { |
| synchronized (mLock) { |
| for (File f : mIntervalDirs) { |
| f.mkdirs(); |
| if (!f.exists()) { |
| throw new IllegalStateException("Failed to create directory " |
| + f.getAbsolutePath()); |
| } |
| } |
| |
| checkVersionAndBuildLocked(); |
| indexFilesLocked(); |
| |
| // Delete files that are in the future. |
| for (TimeSparseArray<AtomicFile> files : mSortedStatFiles) { |
| final int startIndex = files.closestIndexOnOrAfter(currentTimeMillis); |
| if (startIndex < 0) { |
| continue; |
| } |
| |
| final int fileCount = files.size(); |
| for (int i = startIndex; i < fileCount; i++) { |
| files.valueAt(i).delete(); |
| } |
| |
| // Remove in a separate loop because any accesses (valueAt) |
| // will cause a gc in the SparseArray and mess up the order. |
| for (int i = startIndex; i < fileCount; i++) { |
| files.removeAt(i); |
| } |
| } |
| } |
| } |
| |
| public interface CheckinAction { |
| boolean checkin(IntervalStats stats); |
| } |
| |
| /** |
| * Calls {@link CheckinAction#checkin(IntervalStats)} on the given {@link CheckinAction} |
| * for all {@link IntervalStats} that haven't been checked-in. |
| * If any of the calls to {@link CheckinAction#checkin(IntervalStats)} returns false or throws |
| * an exception, the check-in will be aborted. |
| * |
| * @param checkinAction The callback to run when checking-in {@link IntervalStats}. |
| * @return true if the check-in succeeded. |
| */ |
| public boolean checkinDailyFiles(CheckinAction checkinAction) { |
| synchronized (mLock) { |
| final TimeSparseArray<AtomicFile> files = |
| mSortedStatFiles[UsageStatsManager.INTERVAL_DAILY]; |
| final int fileCount = files.size(); |
| |
| // We may have holes in the checkin (if there was an error) |
| // so find the last checked-in file and go from there. |
| int lastCheckin = -1; |
| for (int i = 0; i < fileCount - 1; i++) { |
| if (files.valueAt(i).getBaseFile().getPath().endsWith(CHECKED_IN_SUFFIX)) { |
| lastCheckin = i; |
| } |
| } |
| |
| final int start = lastCheckin + 1; |
| if (start == fileCount - 1) { |
| return true; |
| } |
| |
| try { |
| IntervalStats stats = new IntervalStats(); |
| for (int i = start; i < fileCount - 1; i++) { |
| UsageStatsXml.read(files.valueAt(i), stats); |
| if (!checkinAction.checkin(stats)) { |
| return false; |
| } |
| } |
| } catch (IOException e) { |
| Slog.e(TAG, "Failed to check-in", e); |
| return false; |
| } |
| |
| // We have successfully checked-in the stats, so rename the files so that they |
| // are marked as checked-in. |
| for (int i = start; i < fileCount - 1; i++) { |
| final AtomicFile file = files.valueAt(i); |
| final File checkedInFile = new File( |
| file.getBaseFile().getPath() + CHECKED_IN_SUFFIX); |
| if (!file.getBaseFile().renameTo(checkedInFile)) { |
| // We must return success, as we've already marked some files as checked-in. |
| // It's better to repeat ourselves than to lose data. |
| Slog.e(TAG, "Failed to mark file " + file.getBaseFile().getPath() |
| + " as checked-in"); |
| return true; |
| } |
| |
| // AtomicFile needs to set a new backup path with the same -c extension, so |
| // we replace the old AtomicFile with the updated one. |
| files.setValueAt(i, new AtomicFile(checkedInFile)); |
| } |
| } |
| return true; |
| } |
| |
| private void indexFilesLocked() { |
| final FilenameFilter backupFileFilter = new FilenameFilter() { |
| @Override |
| public boolean accept(File dir, String name) { |
| return !name.endsWith(BAK_SUFFIX); |
| } |
| }; |
| |
| // Index the available usage stat files on disk. |
| for (int i = 0; i < mSortedStatFiles.length; i++) { |
| if (mSortedStatFiles[i] == null) { |
| mSortedStatFiles[i] = new TimeSparseArray<>(); |
| } else { |
| mSortedStatFiles[i].clear(); |
| } |
| File[] files = mIntervalDirs[i].listFiles(backupFileFilter); |
| if (files != null) { |
| if (DEBUG) { |
| Slog.d(TAG, "Found " + files.length + " stat files for interval " + i); |
| } |
| |
| for (File f : files) { |
| final AtomicFile af = new AtomicFile(f); |
| try { |
| mSortedStatFiles[i].put(UsageStatsXml.parseBeginTime(af), af); |
| } catch (IOException e) { |
| Slog.e(TAG, "failed to index file: " + f, e); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Is this the first update to the system from L to M? |
| */ |
| boolean isFirstUpdate() { |
| return mFirstUpdate; |
| } |
| |
| /** |
| * Is this a system update since we started tracking build fingerprint in the version file? |
| */ |
| boolean isNewUpdate() { |
| return mNewUpdate; |
| } |
| |
| private void checkVersionAndBuildLocked() { |
| int version; |
| String buildFingerprint; |
| String currentFingerprint = getBuildFingerprint(); |
| mFirstUpdate = true; |
| mNewUpdate = true; |
| try (BufferedReader reader = new BufferedReader(new FileReader(mVersionFile))) { |
| version = Integer.parseInt(reader.readLine()); |
| buildFingerprint = reader.readLine(); |
| if (buildFingerprint != null) { |
| mFirstUpdate = false; |
| } |
| if (currentFingerprint.equals(buildFingerprint)) { |
| mNewUpdate = false; |
| } |
| } catch (NumberFormatException | IOException e) { |
| version = 0; |
| } |
| |
| if (version != CURRENT_VERSION) { |
| Slog.i(TAG, "Upgrading from version " + version + " to " + CURRENT_VERSION); |
| doUpgradeLocked(version); |
| } |
| |
| if (version != CURRENT_VERSION || mNewUpdate) { |
| try (BufferedWriter writer = new BufferedWriter(new FileWriter(mVersionFile))) { |
| writer.write(Integer.toString(CURRENT_VERSION)); |
| writer.write("\n"); |
| writer.write(currentFingerprint); |
| writer.write("\n"); |
| writer.flush(); |
| } catch (IOException e) { |
| Slog.e(TAG, "Failed to write new version"); |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| private String getBuildFingerprint() { |
| return Build.VERSION.RELEASE + ";" |
| + Build.VERSION.CODENAME + ";" |
| + Build.VERSION.INCREMENTAL; |
| } |
| |
| private void doUpgradeLocked(int thisVersion) { |
| if (thisVersion < 2) { |
| // Delete all files if we are version 0. This is a pre-release version, |
| // so this is fine. |
| Slog.i(TAG, "Deleting all usage stats files"); |
| for (int i = 0; i < mIntervalDirs.length; i++) { |
| File[] files = mIntervalDirs[i].listFiles(); |
| if (files != null) { |
| for (File f : files) { |
| f.delete(); |
| } |
| } |
| } |
| } |
| } |
| |
| public void onTimeChanged(long timeDiffMillis) { |
| synchronized (mLock) { |
| StringBuilder logBuilder = new StringBuilder(); |
| logBuilder.append("Time changed by "); |
| TimeUtils.formatDuration(timeDiffMillis, logBuilder); |
| logBuilder.append("."); |
| |
| int filesDeleted = 0; |
| int filesMoved = 0; |
| |
| for (TimeSparseArray<AtomicFile> files : mSortedStatFiles) { |
| final int fileCount = files.size(); |
| for (int i = 0; i < fileCount; i++) { |
| final AtomicFile file = files.valueAt(i); |
| final long newTime = files.keyAt(i) + timeDiffMillis; |
| if (newTime < 0) { |
| filesDeleted++; |
| file.delete(); |
| } else { |
| try { |
| file.openRead().close(); |
| } catch (IOException e) { |
| // Ignore, this is just to make sure there are no backups. |
| } |
| |
| String newName = Long.toString(newTime); |
| if (file.getBaseFile().getName().endsWith(CHECKED_IN_SUFFIX)) { |
| newName = newName + CHECKED_IN_SUFFIX; |
| } |
| |
| final File newFile = new File(file.getBaseFile().getParentFile(), newName); |
| filesMoved++; |
| file.getBaseFile().renameTo(newFile); |
| } |
| } |
| files.clear(); |
| } |
| |
| logBuilder.append(" files deleted: ").append(filesDeleted); |
| logBuilder.append(" files moved: ").append(filesMoved); |
| Slog.i(TAG, logBuilder.toString()); |
| |
| // Now re-index the new files. |
| indexFilesLocked(); |
| } |
| } |
| |
| /** |
| * Get the latest stats that exist for this interval type. |
| */ |
| public IntervalStats getLatestUsageStats(int intervalType) { |
| synchronized (mLock) { |
| if (intervalType < 0 || intervalType >= mIntervalDirs.length) { |
| throw new IllegalArgumentException("Bad interval type " + intervalType); |
| } |
| |
| final int fileCount = mSortedStatFiles[intervalType].size(); |
| if (fileCount == 0) { |
| return null; |
| } |
| |
| try { |
| final AtomicFile f = mSortedStatFiles[intervalType].valueAt(fileCount - 1); |
| IntervalStats stats = new IntervalStats(); |
| UsageStatsXml.read(f, stats); |
| return stats; |
| } catch (IOException e) { |
| Slog.e(TAG, "Failed to read usage stats file", e); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Figures out what to extract from the given IntervalStats object. |
| */ |
| interface StatCombiner<T> { |
| |
| /** |
| * Implementations should extract interesting from <code>stats</code> and add it |
| * to the <code>accumulatedResult</code> list. |
| * |
| * If the <code>stats</code> object is mutable, <code>mutable</code> will be true, |
| * which means you should make a copy of the data before adding it to the |
| * <code>accumulatedResult</code> list. |
| * |
| * @param stats The {@link IntervalStats} object selected. |
| * @param mutable Whether or not the data inside the stats object is mutable. |
| * @param accumulatedResult The list to which to add extracted data. |
| */ |
| void combine(IntervalStats stats, boolean mutable, List<T> accumulatedResult); |
| } |
| |
| /** |
| * Find all {@link IntervalStats} for the given range and interval type. |
| */ |
| public <T> List<T> queryUsageStats(int intervalType, long beginTime, long endTime, |
| StatCombiner<T> combiner) { |
| synchronized (mLock) { |
| if (intervalType < 0 || intervalType >= mIntervalDirs.length) { |
| throw new IllegalArgumentException("Bad interval type " + intervalType); |
| } |
| |
| final TimeSparseArray<AtomicFile> intervalStats = mSortedStatFiles[intervalType]; |
| |
| if (endTime <= beginTime) { |
| if (DEBUG) { |
| Slog.d(TAG, "endTime(" + endTime + ") <= beginTime(" + beginTime + ")"); |
| } |
| return null; |
| } |
| |
| int startIndex = intervalStats.closestIndexOnOrBefore(beginTime); |
| if (startIndex < 0) { |
| // All the stats available have timestamps after beginTime, which means they all |
| // match. |
| startIndex = 0; |
| } |
| |
| int endIndex = intervalStats.closestIndexOnOrBefore(endTime); |
| if (endIndex < 0) { |
| // All the stats start after this range ends, so nothing matches. |
| if (DEBUG) { |
| Slog.d(TAG, "No results for this range. All stats start after."); |
| } |
| return null; |
| } |
| |
| if (intervalStats.keyAt(endIndex) == endTime) { |
| // The endTime is exclusive, so if we matched exactly take the one before. |
| endIndex--; |
| if (endIndex < 0) { |
| // All the stats start after this range ends, so nothing matches. |
| if (DEBUG) { |
| Slog.d(TAG, "No results for this range. All stats start after."); |
| } |
| return null; |
| } |
| } |
| |
| final IntervalStats stats = new IntervalStats(); |
| final ArrayList<T> results = new ArrayList<>(); |
| for (int i = startIndex; i <= endIndex; i++) { |
| final AtomicFile f = intervalStats.valueAt(i); |
| |
| if (DEBUG) { |
| Slog.d(TAG, "Reading stat file " + f.getBaseFile().getAbsolutePath()); |
| } |
| |
| try { |
| UsageStatsXml.read(f, stats); |
| if (beginTime < stats.endTime) { |
| combiner.combine(stats, false, results); |
| } |
| } catch (IOException e) { |
| Slog.e(TAG, "Failed to read usage stats file", e); |
| // We continue so that we return results that are not |
| // corrupt. |
| } |
| } |
| return results; |
| } |
| } |
| |
| /** |
| * Find the interval that best matches this range. |
| * |
| * TODO(adamlesinski): Use endTimeStamp in best fit calculation. |
| */ |
| public int findBestFitBucket(long beginTimeStamp, long endTimeStamp) { |
| synchronized (mLock) { |
| int bestBucket = -1; |
| long smallestDiff = Long.MAX_VALUE; |
| for (int i = mSortedStatFiles.length - 1; i >= 0; i--) { |
| final int index = mSortedStatFiles[i].closestIndexOnOrBefore(beginTimeStamp); |
| int size = mSortedStatFiles[i].size(); |
| if (index >= 0 && index < size) { |
| // We have some results here, check if they are better than our current match. |
| long diff = Math.abs(mSortedStatFiles[i].keyAt(index) - beginTimeStamp); |
| if (diff < smallestDiff) { |
| smallestDiff = diff; |
| bestBucket = i; |
| } |
| } |
| } |
| return bestBucket; |
| } |
| } |
| |
| /** |
| * Remove any usage stat files that are too old. |
| */ |
| public void prune(final long currentTimeMillis) { |
| synchronized (mLock) { |
| mCal.setTimeInMillis(currentTimeMillis); |
| mCal.addYears(-3); |
| pruneFilesOlderThan(mIntervalDirs[UsageStatsManager.INTERVAL_YEARLY], |
| mCal.getTimeInMillis()); |
| |
| mCal.setTimeInMillis(currentTimeMillis); |
| mCal.addMonths(-6); |
| pruneFilesOlderThan(mIntervalDirs[UsageStatsManager.INTERVAL_MONTHLY], |
| mCal.getTimeInMillis()); |
| |
| mCal.setTimeInMillis(currentTimeMillis); |
| mCal.addWeeks(-4); |
| pruneFilesOlderThan(mIntervalDirs[UsageStatsManager.INTERVAL_WEEKLY], |
| mCal.getTimeInMillis()); |
| |
| mCal.setTimeInMillis(currentTimeMillis); |
| mCal.addDays(-10); |
| pruneFilesOlderThan(mIntervalDirs[UsageStatsManager.INTERVAL_DAILY], |
| mCal.getTimeInMillis()); |
| |
| mCal.setTimeInMillis(currentTimeMillis); |
| mCal.addDays(-SELECTION_LOG_RETENTION_LEN); |
| for (int i = 0; i < mIntervalDirs.length; ++i) { |
| pruneChooserCountsOlderThan(mIntervalDirs[i], mCal.getTimeInMillis()); |
| } |
| |
| // We must re-index our file list or we will be trying to read |
| // deleted files. |
| indexFilesLocked(); |
| } |
| } |
| |
| private static void pruneFilesOlderThan(File dir, long expiryTime) { |
| File[] files = dir.listFiles(); |
| if (files != null) { |
| for (File f : files) { |
| String path = f.getPath(); |
| if (path.endsWith(BAK_SUFFIX)) { |
| f = new File(path.substring(0, path.length() - BAK_SUFFIX.length())); |
| } |
| |
| long beginTime; |
| try { |
| beginTime = UsageStatsXml.parseBeginTime(f); |
| } catch (IOException e) { |
| beginTime = 0; |
| } |
| |
| if (beginTime < expiryTime) { |
| new AtomicFile(f).delete(); |
| } |
| } |
| } |
| } |
| |
| private static void pruneChooserCountsOlderThan(File dir, long expiryTime) { |
| File[] files = dir.listFiles(); |
| if (files != null) { |
| for (File f : files) { |
| String path = f.getPath(); |
| if (path.endsWith(BAK_SUFFIX)) { |
| f = new File(path.substring(0, path.length() - BAK_SUFFIX.length())); |
| } |
| |
| long beginTime; |
| try { |
| beginTime = UsageStatsXml.parseBeginTime(f); |
| } catch (IOException e) { |
| beginTime = 0; |
| } |
| |
| if (beginTime < expiryTime) { |
| try { |
| final AtomicFile af = new AtomicFile(f); |
| final IntervalStats stats = new IntervalStats(); |
| UsageStatsXml.read(af, stats); |
| final int pkgCount = stats.packageStats.size(); |
| for (int i = 0; i < pkgCount; i++) { |
| UsageStats pkgStats = stats.packageStats.valueAt(i); |
| if (pkgStats.mChooserCounts != null) { |
| pkgStats.mChooserCounts.clear(); |
| } |
| } |
| UsageStatsXml.write(af, stats); |
| } catch (IOException e) { |
| Slog.e(TAG, "Failed to delete chooser counts from usage stats file", e); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Update the stats in the database. They may not be written to disk immediately. |
| */ |
| public void putUsageStats(int intervalType, IntervalStats stats) throws IOException { |
| if (stats == null) return; |
| synchronized (mLock) { |
| if (intervalType < 0 || intervalType >= mIntervalDirs.length) { |
| throw new IllegalArgumentException("Bad interval type " + intervalType); |
| } |
| |
| AtomicFile f = mSortedStatFiles[intervalType].get(stats.beginTime); |
| if (f == null) { |
| f = new AtomicFile(new File(mIntervalDirs[intervalType], |
| Long.toString(stats.beginTime))); |
| mSortedStatFiles[intervalType].put(stats.beginTime, f); |
| } |
| |
| UsageStatsXml.write(f, stats); |
| stats.lastTimeSaved = f.getLastModifiedTime(); |
| } |
| } |
| |
| |
| /* Backup/Restore Code */ |
| byte[] getBackupPayload(String key) { |
| synchronized (mLock) { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| if (KEY_USAGE_STATS.equals(key)) { |
| prune(System.currentTimeMillis()); |
| DataOutputStream out = new DataOutputStream(baos); |
| try { |
| out.writeInt(BACKUP_VERSION); |
| |
| out.writeInt(mSortedStatFiles[UsageStatsManager.INTERVAL_DAILY].size()); |
| for (int i = 0; i < mSortedStatFiles[UsageStatsManager.INTERVAL_DAILY].size(); |
| i++) { |
| writeIntervalStatsToStream(out, |
| mSortedStatFiles[UsageStatsManager.INTERVAL_DAILY].valueAt(i)); |
| } |
| |
| out.writeInt(mSortedStatFiles[UsageStatsManager.INTERVAL_WEEKLY].size()); |
| for (int i = 0; i < mSortedStatFiles[UsageStatsManager.INTERVAL_WEEKLY].size(); |
| i++) { |
| writeIntervalStatsToStream(out, |
| mSortedStatFiles[UsageStatsManager.INTERVAL_WEEKLY].valueAt(i)); |
| } |
| |
| out.writeInt(mSortedStatFiles[UsageStatsManager.INTERVAL_MONTHLY].size()); |
| for (int i = 0; i < mSortedStatFiles[UsageStatsManager.INTERVAL_MONTHLY].size(); |
| i++) { |
| writeIntervalStatsToStream(out, |
| mSortedStatFiles[UsageStatsManager.INTERVAL_MONTHLY].valueAt(i)); |
| } |
| |
| out.writeInt(mSortedStatFiles[UsageStatsManager.INTERVAL_YEARLY].size()); |
| for (int i = 0; i < mSortedStatFiles[UsageStatsManager.INTERVAL_YEARLY].size(); |
| i++) { |
| writeIntervalStatsToStream(out, |
| mSortedStatFiles[UsageStatsManager.INTERVAL_YEARLY].valueAt(i)); |
| } |
| if (DEBUG) Slog.i(TAG, "Written " + baos.size() + " bytes of data"); |
| } catch (IOException ioe) { |
| Slog.d(TAG, "Failed to write data to output stream", ioe); |
| baos.reset(); |
| } |
| } |
| return baos.toByteArray(); |
| } |
| |
| } |
| |
| void applyRestoredPayload(String key, byte[] payload) { |
| synchronized (mLock) { |
| if (KEY_USAGE_STATS.equals(key)) { |
| // Read stats files for the current device configs |
| IntervalStats dailyConfigSource = |
| getLatestUsageStats(UsageStatsManager.INTERVAL_DAILY); |
| IntervalStats weeklyConfigSource = |
| getLatestUsageStats(UsageStatsManager.INTERVAL_WEEKLY); |
| IntervalStats monthlyConfigSource = |
| getLatestUsageStats(UsageStatsManager.INTERVAL_MONTHLY); |
| IntervalStats yearlyConfigSource = |
| getLatestUsageStats(UsageStatsManager.INTERVAL_YEARLY); |
| |
| try { |
| DataInputStream in = new DataInputStream(new ByteArrayInputStream(payload)); |
| int backupDataVersion = in.readInt(); |
| |
| // Can't handle this backup set |
| if (backupDataVersion < 1 || backupDataVersion > BACKUP_VERSION) return; |
| |
| // Delete all stats files |
| // Do this after reading version and before actually restoring |
| for (int i = 0; i < mIntervalDirs.length; i++) { |
| deleteDirectoryContents(mIntervalDirs[i]); |
| } |
| |
| int fileCount = in.readInt(); |
| for (int i = 0; i < fileCount; i++) { |
| IntervalStats stats = deserializeIntervalStats(getIntervalStatsBytes(in)); |
| stats = mergeStats(stats, dailyConfigSource); |
| putUsageStats(UsageStatsManager.INTERVAL_DAILY, stats); |
| } |
| |
| fileCount = in.readInt(); |
| for (int i = 0; i < fileCount; i++) { |
| IntervalStats stats = deserializeIntervalStats(getIntervalStatsBytes(in)); |
| stats = mergeStats(stats, weeklyConfigSource); |
| putUsageStats(UsageStatsManager.INTERVAL_WEEKLY, stats); |
| } |
| |
| fileCount = in.readInt(); |
| for (int i = 0; i < fileCount; i++) { |
| IntervalStats stats = deserializeIntervalStats(getIntervalStatsBytes(in)); |
| stats = mergeStats(stats, monthlyConfigSource); |
| putUsageStats(UsageStatsManager.INTERVAL_MONTHLY, stats); |
| } |
| |
| fileCount = in.readInt(); |
| for (int i = 0; i < fileCount; i++) { |
| IntervalStats stats = deserializeIntervalStats(getIntervalStatsBytes(in)); |
| stats = mergeStats(stats, yearlyConfigSource); |
| putUsageStats(UsageStatsManager.INTERVAL_YEARLY, stats); |
| } |
| if (DEBUG) Slog.i(TAG, "Completed Restoring UsageStats"); |
| } catch (IOException ioe) { |
| Slog.d(TAG, "Failed to read data from input stream", ioe); |
| } finally { |
| indexFilesLocked(); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Get the Configuration Statistics from the current device statistics and merge them |
| * with the backed up usage statistics. |
| */ |
| private IntervalStats mergeStats(IntervalStats beingRestored, IntervalStats onDevice) { |
| if (onDevice == null) return beingRestored; |
| if (beingRestored == null) return null; |
| beingRestored.activeConfiguration = onDevice.activeConfiguration; |
| beingRestored.configurations.putAll(onDevice.configurations); |
| beingRestored.events = onDevice.events; |
| return beingRestored; |
| } |
| |
| private void writeIntervalStatsToStream(DataOutputStream out, AtomicFile statsFile) |
| throws IOException { |
| IntervalStats stats = new IntervalStats(); |
| try { |
| UsageStatsXml.read(statsFile, stats); |
| } catch (IOException e) { |
| Slog.e(TAG, "Failed to read usage stats file", e); |
| out.writeInt(0); |
| return; |
| } |
| sanitizeIntervalStatsForBackup(stats); |
| byte[] data = serializeIntervalStats(stats); |
| out.writeInt(data.length); |
| out.write(data); |
| } |
| |
| private static byte[] getIntervalStatsBytes(DataInputStream in) throws IOException { |
| int length = in.readInt(); |
| byte[] buffer = new byte[length]; |
| in.read(buffer, 0, length); |
| return buffer; |
| } |
| |
| private static void sanitizeIntervalStatsForBackup(IntervalStats stats) { |
| if (stats == null) return; |
| stats.activeConfiguration = null; |
| stats.configurations.clear(); |
| if (stats.events != null) stats.events.clear(); |
| } |
| |
| private static byte[] serializeIntervalStats(IntervalStats stats) { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| DataOutputStream out = new DataOutputStream(baos); |
| try { |
| out.writeLong(stats.beginTime); |
| UsageStatsXml.write(out, stats); |
| } catch (IOException ioe) { |
| Slog.d(TAG, "Serializing IntervalStats Failed", ioe); |
| baos.reset(); |
| } |
| return baos.toByteArray(); |
| } |
| |
| private static IntervalStats deserializeIntervalStats(byte[] data) { |
| ByteArrayInputStream bais = new ByteArrayInputStream(data); |
| DataInputStream in = new DataInputStream(bais); |
| IntervalStats stats = new IntervalStats(); |
| try { |
| stats.beginTime = in.readLong(); |
| UsageStatsXml.read(in, stats); |
| } catch (IOException ioe) { |
| Slog.d(TAG, "DeSerializing IntervalStats Failed", ioe); |
| stats = null; |
| } |
| return stats; |
| } |
| |
| private static void deleteDirectoryContents(File directory) { |
| File[] files = directory.listFiles(); |
| for (File file : files) { |
| deleteDirectory(file); |
| } |
| } |
| |
| private static void deleteDirectory(File directory) { |
| File[] files = directory.listFiles(); |
| if (files != null) { |
| for (File file : files) { |
| if (!file.isDirectory()) { |
| file.delete(); |
| } else { |
| deleteDirectory(file); |
| } |
| } |
| } |
| directory.delete(); |
| } |
| } |
