UsageStats should deal with changing time (66143fa5) · Commits · e / os / android_frameworks_base

services/usage/java/com/android/server/usage/UsageStatsDatabase.java

+80 −23

Original line number	Diff line number	Diff line
		@@ -61,7 +61,7 @@ class UsageStatsDatabase {
		/**
		* Initialize any directories required and index what stats are available.
		*/
		void init() {
		public void init(long currentTimeMillis) {
		synchronized (mLock) {
		for (File f : mIntervalDirs) {
		f.mkdirs();
		@@ -72,7 +72,30 @@ class UsageStatsDatabase {
		}

		checkVersionLocked();
		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);
		}
		}
		}
		}

		private void indexFilesLocked() {
		final FilenameFilter backupFileFilter = new FilenameFilter() {
		@Override
		public boolean accept(File dir, String name) {
		@@ -82,7 +105,11 @@ class UsageStatsDatabase {

		// 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) {
		@@ -96,7 +123,6 @@ class UsageStatsDatabase {
		}
		}
		}
		}

		private void checkVersionLocked() {
		int version;
		@@ -135,6 +161,38 @@ class UsageStatsDatabase {
		}
		}

		public void onTimeChanged(long timeDiffMillis) {
		synchronized (mLock) {
		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) {
		Slog.i(TAG, "Deleting file " + file.getBaseFile().getAbsolutePath()
		+ " for it is in the future now.");
		file.delete();
		} else {
		try {
		file.openRead().close();
		} catch (IOException e) {
		// Ignore, this is just to make sure there are no backups.
		}
		final File newFile = new File(file.getBaseFile().getParentFile(),
		Long.toString(newTime));
		Slog.i(TAG, "Moving file " + file.getBaseFile().getAbsolutePath() + " to "
		+ newFile.getAbsolutePath());
		file.getBaseFile().renameTo(newFile);
		}
		}
		files.clear();
		}

		// Now re-index the new files.
		indexFilesLocked();
		}
		}

		/**
		* Get the latest stats that exist for this interval type.
		*/
		@@ -296,25 +354,24 @@ class UsageStatsDatabase {
		/**
		* Remove any usage stat files that are too old.
		*/
		public void prune() {
		public void prune(final long currentTimeMillis) {
		synchronized (mLock) {
		long timeNow = System.currentTimeMillis();
		mCal.setTimeInMillis(timeNow);
		mCal.setTimeInMillis(currentTimeMillis);
		mCal.addYears(-3);
		pruneFilesOlderThan(mIntervalDirs[UsageStatsManager.INTERVAL_YEARLY],
		mCal.getTimeInMillis());

		mCal.setTimeInMillis(timeNow);
		mCal.setTimeInMillis(currentTimeMillis);
		mCal.addMonths(-6);
		pruneFilesOlderThan(mIntervalDirs[UsageStatsManager.INTERVAL_MONTHLY],
		mCal.getTimeInMillis());

		mCal.setTimeInMillis(timeNow);
		mCal.setTimeInMillis(currentTimeMillis);
		mCal.addWeeks(-4);
		pruneFilesOlderThan(mIntervalDirs[UsageStatsManager.INTERVAL_WEEKLY],
		mCal.getTimeInMillis());

		mCal.setTimeInMillis(timeNow);
		mCal.setTimeInMillis(currentTimeMillis);
		mCal.addDays(-7);
		pruneFilesOlderThan(mIntervalDirs[UsageStatsManager.INTERVAL_DAILY],
		mCal.getTimeInMillis());

services/usage/java/com/android/server/usage/UsageStatsService.java

+68 −31

Original line number	Diff line number	Diff line
		@@ -64,6 +64,7 @@ public class UsageStatsService extends SystemService implements
		private static final long TEN_SECONDS = 10 * 1000;
		private static final long TWENTY_MINUTES = 20 * 60 * 1000;
		private static final long FLUSH_INTERVAL = DEBUG ? TEN_SECONDS : TWENTY_MINUTES;
		private static final long TIME_CHANGE_THRESHOLD_MILLIS = 2 * 1000; // Two seconds.

		// Handler message types.
		static final int MSG_REPORT_EVENT = 0;
		@@ -170,17 +171,46 @@ public class UsageStatsService extends SystemService implements
		}
		}

		private UserUsageStatsService getUserDataAndInitializeIfNeededLocked(int userId) {
		private UserUsageStatsService getUserDataAndInitializeIfNeededLocked(int userId,
		long currentTimeMillis) {
		UserUsageStatsService service = mUserState.get(userId);
		if (service == null) {
		service = new UserUsageStatsService(userId,
		new File(mUsageStatsDir, Integer.toString(userId)), this);
		service.init();
		service.init(currentTimeMillis);
		mUserState.put(userId, service);
		}
		return service;
		}

		/**
		* This should be the only way to get the time from the system.
		*/
		private long checkAndGetTimeLocked() {
		final long actualSystemTime = System.currentTimeMillis();
		final long actualRealtime = SystemClock.elapsedRealtime();
		final long expectedSystemTime = (actualRealtime - mRealTimeSnapshot) + mSystemTimeSnapshot;
		if (Math.abs(actualSystemTime - expectedSystemTime) > TIME_CHANGE_THRESHOLD_MILLIS) {
		// The time has changed.
		final int userCount = mUserState.size();
		for (int i = 0; i < userCount; i++) {
		final UserUsageStatsService service = mUserState.valueAt(i);
		service.onTimeChanged(expectedSystemTime, actualSystemTime);
		}
		mRealTimeSnapshot = actualRealtime;
		mSystemTimeSnapshot = actualSystemTime;
		}
		return actualSystemTime;
		}

		/**
		* Assuming the event's timestamp is measured in milliseconds since boot,
		* convert it to a system wall time.
		*/
		private void convertToSystemTimeLocked(UsageEvents.Event event) {
		event.mTimeStamp = Math.max(0, event.mTimeStamp - mRealTimeSnapshot) + mSystemTimeSnapshot;
		}

		/**
		* Called by the Binder stub
		*/
		@@ -196,7 +226,11 @@ public class UsageStatsService extends SystemService implements
		*/
		void reportEvent(UsageEvents.Event event, int userId) {
		synchronized (mLock) {
		final UserUsageStatsService service = getUserDataAndInitializeIfNeededLocked(userId);
		final long timeNow = checkAndGetTimeLocked();
		convertToSystemTimeLocked(event);

		final UserUsageStatsService service =
		getUserDataAndInitializeIfNeededLocked(userId, timeNow);
		service.reportEvent(event);
		}
		}
		@@ -225,12 +259,14 @@ public class UsageStatsService extends SystemService implements
		* Called by the Binder stub.
		*/
		List<UsageStats> queryUsageStats(int userId, int bucketType, long beginTime, long endTime) {
		if (!validRange(beginTime, endTime)) {
		synchronized (mLock) {
		final long timeNow = checkAndGetTimeLocked();
		if (!validRange(timeNow, beginTime, endTime)) {
		return null;
		}

		synchronized (mLock) {
		UserUsageStatsService service = getUserDataAndInitializeIfNeededLocked(userId);
		final UserUsageStatsService service =
		getUserDataAndInitializeIfNeededLocked(userId, timeNow);
		return service.queryUsageStats(bucketType, beginTime, endTime);
		}
		}
		@@ -240,12 +276,14 @@ public class UsageStatsService extends SystemService implements
		*/
		List<ConfigurationStats> queryConfigurationStats(int userId, int bucketType, long beginTime,
		long endTime) {
		if (!validRange(beginTime, endTime)) {
		synchronized (mLock) {
		final long timeNow = checkAndGetTimeLocked();
		if (!validRange(timeNow, beginTime, endTime)) {
		return null;
		}

		synchronized (mLock) {
		UserUsageStatsService service = getUserDataAndInitializeIfNeededLocked(userId);
		final UserUsageStatsService service =
		getUserDataAndInitializeIfNeededLocked(userId, timeNow);
		return service.queryConfigurationStats(bucketType, beginTime, endTime);
		}
		}
		@@ -254,19 +292,20 @@ public class UsageStatsService extends SystemService implements
		* Called by the Binder stub.
		*/
		UsageEvents queryEvents(int userId, long beginTime, long endTime) {
		if (!validRange(beginTime, endTime)) {
		synchronized (mLock) {
		final long timeNow = checkAndGetTimeLocked();
		if (!validRange(timeNow, beginTime, endTime)) {
		return null;
		}

		synchronized (mLock) {
		UserUsageStatsService service = getUserDataAndInitializeIfNeededLocked(userId);
		final UserUsageStatsService service =
		getUserDataAndInitializeIfNeededLocked(userId, timeNow);
		return service.queryEvents(beginTime, endTime);
		}
		}

		private static boolean validRange(long beginTime, long endTime) {
		final long timeNow = System.currentTimeMillis();
		return beginTime <= timeNow && beginTime < endTime;
		private static boolean validRange(long currentTime, long beginTime, long endTime) {
		return beginTime <= currentTime && beginTime < endTime;
		}

		private void flushToDiskLocked() {
		@@ -386,14 +425,6 @@ public class UsageStatsService extends SystemService implements
		*/
		private class LocalService extends UsageStatsManagerInternal {

		/**
		* The system may have its time change, so at least make sure the events
		* are monotonic in order.
		*/
		private long computeMonotonicSystemTime(long realTime) {
		return (realTime - mRealTimeSnapshot) + mSystemTimeSnapshot;
		}

		@Override
		public void reportEvent(ComponentName component, int userId, int eventType) {
		if (component == null) {
		@@ -404,7 +435,10 @@ public class UsageStatsService extends SystemService implements
		UsageEvents.Event event = new UsageEvents.Event();
		event.mPackage = component.getPackageName();
		event.mClass = component.getClassName();
		event.mTimeStamp = computeMonotonicSystemTime(SystemClock.elapsedRealtime());

		// This will later be converted to system time.
		event.mTimeStamp = SystemClock.elapsedRealtime();

		event.mEventType = eventType;
		mHandler.obtainMessage(MSG_REPORT_EVENT, userId, 0, event).sendToTarget();
		}
		@@ -418,7 +452,10 @@ public class UsageStatsService extends SystemService implements

		UsageEvents.Event event = new UsageEvents.Event();
		event.mPackage = "android";
		event.mTimeStamp = computeMonotonicSystemTime(SystemClock.elapsedRealtime());

		// This will later be converted to system time.
		event.mTimeStamp = SystemClock.elapsedRealtime();

		event.mEventType = UsageEvents.Event.CONFIGURATION_CHANGE;
		event.mConfiguration = new Configuration(config);
		mHandler.obtainMessage(MSG_REPORT_EVENT, userId, 0, event).sendToTarget();

services/usage/java/com/android/server/usage/UserUsageStatsService.java

+27 −29

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@ import android.app.usage.UsageEvents;
		import android.app.usage.UsageStats;
		import android.app.usage.UsageStatsManager;
		import android.content.res.Configuration;
		import android.os.SystemClock;
		import android.util.ArraySet;
		import android.util.Slog;

		@@ -62,10 +63,9 @@ class UserUsageStatsService {
		mLogPrefix = "User[" + Integer.toString(userId) + "] ";
		}

		void init() {
		mDatabase.init();
		void init(final long currentTimeMillis) {
		mDatabase.init(currentTimeMillis);

		final long timeNow = System.currentTimeMillis();
		int nullCount = 0;
		for (int i = 0; i < mCurrentStats.length; i++) {
		mCurrentStats[i] = mDatabase.getLatestUsageStats(i);
		@@ -73,11 +73,6 @@ class UserUsageStatsService {
		// Find out how many intervals we don't have data for.
		// Ideally it should be all or none.
		nullCount++;
		} else if (mCurrentStats[i].beginTime > timeNow) {
		Slog.e(TAG, mLogPrefix + "Interval " + i + " has stat in the future " +
		mCurrentStats[i].beginTime);
		mCurrentStats[i] = null;
		nullCount++;
		}
		}

		@@ -92,7 +87,7 @@ class UserUsageStatsService {

		// By calling loadActiveStats, we will
		// generate new stats for each bucket.
		loadActiveStats();
		loadActiveStats(currentTimeMillis, false);
		} else {
		// Set up the expiry date to be one day from the latest daily stat.
		// This may actually be today and we will rollover on the first event
		@@ -123,6 +118,12 @@ class UserUsageStatsService {
		}
		}

		void onTimeChanged(long oldTime, long newTime) {
		persistActiveStats();
		mDatabase.onTimeChanged(newTime - oldTime);
		loadActiveStats(newTime, true);
		}

		void reportEvent(UsageEvents.Event event) {
		if (DEBUG) {
		Slog.d(TAG, mLogPrefix + "Got usage event for " + event.mPackage
		@@ -132,7 +133,7 @@ class UserUsageStatsService {

		if (event.mTimeStamp >= mDailyExpiryDate.getTimeInMillis()) {
		// Need to rollover
		rolloverStats();
		rolloverStats(event.mTimeStamp);
		}

		final IntervalStats currentDailyStats = mCurrentStats[UsageStatsManager.INTERVAL_DAILY];
		@@ -330,8 +331,8 @@ class UserUsageStatsService {
		}
		}

		private void rolloverStats() {
		final long startTime = System.currentTimeMillis();
		private void rolloverStats(final long currentTimeMillis) {
		final long startTime = SystemClock.elapsedRealtime();
		Slog.i(TAG, mLogPrefix + "Rolling over usage stats");

		// Finish any ongoing events with an END_OF_DAY event. Make a note of which components
		@@ -348,7 +349,7 @@ class UserUsageStatsService {
		continuePreviousDay.add(pkgStats.mPackageName);
		stat.update(pkgStats.mPackageName, mDailyExpiryDate.getTimeInMillis() - 1,
		UsageEvents.Event.END_OF_DAY);
		mStatsChanged = true;
		notifyStatsChanged();
		}
		}

		@@ -356,8 +357,8 @@ class UserUsageStatsService {
		}

		persistActiveStats();
		mDatabase.prune();
		loadActiveStats();
		mDatabase.prune(currentTimeMillis);
		loadActiveStats(currentTimeMillis, false);

		final int continueCount = continuePreviousDay.size();
		for (int i = 0; i < continueCount; i++) {
		@@ -366,12 +367,12 @@ class UserUsageStatsService {
		for (IntervalStats stat : mCurrentStats) {
		stat.update(name, beginTime, UsageEvents.Event.CONTINUE_PREVIOUS_DAY);
		stat.updateConfigurationStats(previousConfig, beginTime);
		mStatsChanged = true;
		notifyStatsChanged();
		}
		}
		persistActiveStats();

		final long totalTime = System.currentTimeMillis() - startTime;
		final long totalTime = SystemClock.elapsedRealtime() - startTime;
		Slog.i(TAG, mLogPrefix + "Rolling over usage stats complete. Took " + totalTime
		+ " milliseconds");
		}
		@@ -383,15 +384,16 @@ class UserUsageStatsService {
		}
		}

		private void loadActiveStats() {
		final long timeNow = System.currentTimeMillis();

		/**
		* @param force To force all in-memory stats to be reloaded.
		*/
		private void loadActiveStats(final long currentTimeMillis, boolean force) {
		final UnixCalendar tempCal = mDailyExpiryDate;
		for (int intervalType = 0; intervalType < mCurrentStats.length; intervalType++) {
		tempCal.setTimeInMillis(timeNow);
		tempCal.setTimeInMillis(currentTimeMillis);
		UnixCalendar.truncateTo(tempCal, intervalType);

		if (mCurrentStats[intervalType] != null &&
		if (!force && mCurrentStats[intervalType] != null &&
		mCurrentStats[intervalType].beginTime == tempCal.getTimeInMillis()) {
		// These are the same, no need to load them (in memory stats are always newer
		// than persisted stats).
		@@ -399,11 +401,7 @@ class UserUsageStatsService {
		}

		final long lastBeginTime = mDatabase.getLatestUsageStatsBeginTime(intervalType);
		if (lastBeginTime > timeNow) {
		Slog.e(TAG, mLogPrefix + "Latest usage stats for interval " +
		intervalType + " begins in the future");
		mCurrentStats[intervalType] = null;
		} else if (lastBeginTime >= tempCal.getTimeInMillis()) {
		if (lastBeginTime >= tempCal.getTimeInMillis()) {
		if (DEBUG) {
		Slog.d(TAG, mLogPrefix + "Loading existing stats @ " +
		sDateFormat.format(lastBeginTime) + "(" + lastBeginTime +
		@@ -423,11 +421,11 @@ class UserUsageStatsService {
		}
		mCurrentStats[intervalType] = new IntervalStats();
		mCurrentStats[intervalType].beginTime = tempCal.getTimeInMillis();
		mCurrentStats[intervalType].endTime = timeNow;
		mCurrentStats[intervalType].endTime = currentTimeMillis;
		}
		}
		mStatsChanged = false;
		mDailyExpiryDate.setTimeInMillis(timeNow);
		mDailyExpiryDate.setTimeInMillis(currentTimeMillis);
		mDailyExpiryDate.addDays(1);
		mDailyExpiryDate.truncateToDay();
		Slog.i(TAG, mLogPrefix + "Rollover scheduled @ " +

tests/UsageStatsTest/src/com/android/tests/usagestats/UsageLogActivity.java

+4 −1

Original line number	Diff line number	Diff line
		@@ -86,7 +86,10 @@ public class UsageLogActivity extends ListActivity implements Runnable {
		}
		mEvents.addFirst(event);
		}

		if (lastTimeStamp != 0) {
		notifyDataSetChanged();
		}
		return lastTimeStamp;
		}