am f417247: Further development of backup file handling (17ac18e2) · Commits · e / os / android_frameworks_base

services/java/com/android/server/BackupManagerService.java

+20 −6

Original line number	Diff line number	Diff line
		@@ -62,6 +62,7 @@ class BackupManagerService extends IBackupManager.Stub {
		private final Object mQueueLock = new Object();

		private File mStateDir;
		private File mDataDir;

		// ----- Handler that runs the actual backup process asynchronously -----

		@@ -106,28 +107,41 @@ class BackupManagerService extends IBackupManager.Stub {
		Log.d(TAG, "invoking doBackup() on " + backupIntent);

		File savedStateName = new File(mStateDir, service.packageName);
		File backupDataName = new File(mStateDir, service.packageName + ".data");
		File backupDataName = new File(mDataDir, service.packageName + ".data");
		File newStateName = new File(mStateDir, service.packageName + ".new");

		ParcelFileDescriptor savedState =
		ParcelFileDescriptor.open(savedStateName,
		ParcelFileDescriptor.MODE_READ_ONLY \|
		ParcelFileDescriptor.MODE_CREATE);

		backupDataName.delete();
		ParcelFileDescriptor backupData =
		ParcelFileDescriptor.open(backupDataName,
		ParcelFileDescriptor.MODE_READ_WRITE \|
		ParcelFileDescriptor.MODE_CREATE);

		newStateName.delete();
		ParcelFileDescriptor newState =
		ParcelFileDescriptor.open(newStateName,
		ParcelFileDescriptor.MODE_READ_WRITE \|
		ParcelFileDescriptor.MODE_CREATE);

		// Run the target's backup pass
		try {
		mTargetService.doBackup(savedState, backupData, newState);
		} finally {
		savedState.close();
		backupData.close();
		newState.close();
		}

		// !!! TODO: Now propagate the newly-backed-up data to the transport

		// !!! TODO: After successful transport, juggle the files so that
		// next time the new state is used as the old state
		// !!! TODO: After successful transport, delete the now-stale data
		// and juggle the files so that next time the new state is passed
		backupDataName.delete();
		newStateName.renameTo(savedStateName);

		} catch (FileNotFoundException fnf) {
		Log.d(TAG, "File not found on backup: ");
		@@ -173,9 +187,9 @@ class BackupManagerService extends IBackupManager.Stub {
		mPackageManager = context.getPackageManager();

		// Set up our bookkeeping
		File dataDir = Environment.getDataDirectory();
		mStateDir = new File(dataDir, "backup");
		mStateDir = new File(Environment.getDataDirectory(), "backup");
		mStateDir.mkdirs();
		mDataDir = Environment.getDownloadCacheDirectory();

		// Identify the backup participants
		// !!! TODO: also watch package-install to keep this up to date