With this, the BackupService onBackup method is called. (8ad02811) · Commits · e / os / android_frameworks_base

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

+150 −132

Original line number	Diff line number	Diff line
		@@ -46,6 +46,8 @@ import java.io.FileDescriptor;
		import java.io.FileNotFoundException;
		import java.io.PrintWriter;
		import java.lang.String;
		import java.util.ArrayList;
		import java.util.HashMap;
		import java.util.HashSet;
		import java.util.List;

		@@ -74,62 +76,158 @@ class BackupManagerService extends IBackupManager.Stub {
		fullBackup = isFull;
		}
		}
		private HashSet<BackupRequest> mPendingBackups = new HashSet<BackupRequest>();
		// Backups that we haven't started yet.
		private HashMap<ComponentName,BackupRequest> mPendingBackups = new HashMap();
		// Backups that we have started. These are separate to prevent starvation
		// if an app keeps re-enqueuing itself.
		private ArrayList<BackupRequest> mBackupQueue;
		private final Object mQueueLock = new Object();

		private File mStateDir;
		private File mDataDir;

		// ----- Handler that runs the actual backup process asynchronously -----
		public BackupManagerService(Context context) {
		mContext = context;
		mPackageManager = context.getPackageManager();

		private class BackupHandler extends Handler implements ServiceConnection {
		private volatile Object mBindSignaller = new Object();
		private volatile boolean mBinding = false;
		private IBackupService mTargetService = null;
		// Set up our bookkeeping
		mStateDir = new File(Environment.getDataDirectory(), "backup");
		mStateDir.mkdirs();
		mDataDir = Environment.getDownloadCacheDirectory();

		// Build our mapping of uid to backup client services
		synchronized (mBackupParticipants) {
		addPackageParticipantsLocked(null);
		}

		// Register for broadcasts about package install, etc., so we can
		// update the provider list.
		IntentFilter filter = new IntentFilter();
		filter.addAction(Intent.ACTION_PACKAGE_ADDED);
		filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
		filter.addDataScheme("package");
		mContext.registerReceiver(mBroadcastReceiver, filter);
		}

		// ----- Track installation/removal of packages -----
		BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
		public void onReceive(Context context, Intent intent) {
		if (DEBUG) Log.d(TAG, "Received broadcast " + intent);

		Uri uri = intent.getData();
		if (uri == null) {
		return;
		}
		String pkgName = uri.getSchemeSpecificPart();
		if (pkgName == null) {
		return;
		}

		String action = intent.getAction();
		if (Intent.ACTION_PACKAGE_ADDED.equals(action)) {
		synchronized (mBackupParticipants) {
		Bundle extras = intent.getExtras();
		if (extras != null && extras.getBoolean(Intent.EXTRA_REPLACING, false)) {
		// The package was just upgraded
		updatePackageParticipantsLocked(pkgName);
		} else {
		// The package was just added
		addPackageParticipantsLocked(pkgName);
		}
		}
		}
		else if (Intent.ACTION_PACKAGE_REMOVED.equals(action)) {
		Bundle extras = intent.getExtras();
		if (extras != null && extras.getBoolean(Intent.EXTRA_REPLACING, false)) {
		// The package is being updated. We'll receive a PACKAGE_ADDED shortly.
		} else {
		synchronized (mBackupParticipants) {
		removePackageParticipantsLocked(pkgName);
		}
		}
		}
		}
		};

		// ----- Run the actual backup process asynchronously -----

		private class BackupHandler extends Handler implements ServiceConnection {
		public void handleMessage(Message msg) {

		switch (msg.what) {
		case MSG_RUN_BACKUP:
		{
		// snapshot the pending-backup set and work on that
		HashSet<BackupRequest> queue;
		synchronized (mQueueLock) {
		queue = mPendingBackups;
		mPendingBackups = new HashSet<BackupRequest>();
		mBackupQueue = new ArrayList();
		for (BackupRequest b: mPendingBackups.values()) {
		mBackupQueue.add(b);
		}
		mPendingBackups = new HashMap<ComponentName,BackupRequest>();
		// !!! TODO: start a new backup-queue journal file too
		// WARNING: If we crash after this line, anything in mPendingBackups will
		// be lost. FIX THIS.
		}
		startOneService();
		break;
		}
		}

		public void onServiceConnected(ComponentName name, IBinder service) {
		Log.d(TAG, "onServiceConnected name=" + name + " service=" + service);
		IBackupService bs = IBackupService.Stub.asInterface(service);
		processOneBackup(name, bs);
		}

		public void onServiceDisconnected(ComponentName name) {
		// TODO: handle backup being interrupted
		}
		}

		// Walk the set of pending backups, setting up the relevant files and
		// invoking the backup service in each participant
		Intent backupIntent = new Intent(BackupService.SERVICE_ACTION);
		for (BackupRequest request : queue) {
		mBinding = true;
		mTargetService = null;
		void startOneService() {
		// Loop until we find someone to start or the queue empties out.
		Intent intent = new Intent(BackupService.SERVICE_ACTION);
		while (true) {
		BackupRequest request;
		synchronized (mQueueLock) {
		int queueSize = mBackupQueue.size();
		if (queueSize == 0) {
		mBackupQueue = null;
		// TODO: Anything else to do here?
		return;
		}
		request = mBackupQueue.get(0);
		// Take it off the queue when we're done.
		}

		backupIntent.setClassName(request.service.packageName, request.service.name);
		Log.d(TAG, "binding to " + backupIntent);
		if (mContext.bindService(backupIntent, this, 0)) {
		synchronized (mBindSignaller) {
		while (mTargetService == null && mBinding == true) {
		intent.setClassName(request.service.packageName, request.service.name);
		Log.d(TAG, "binding to " + intent);
		try {
		mBindSignaller.wait();
		} catch (InterruptedException e) {
		if (mContext.bindService(intent, mBackupHandler, Context.BIND_AUTO_CREATE)) {
		Log.d(TAG, "awaiting service object for " + intent);
		// success
		return;
		}
		} catch (SecurityException ex) {
		// Try for the next one.
		Log.d(TAG, "error in bind", ex);
		}
		}
		}
		if (mTargetService != null) {

		void processOneBackup(ComponentName name, IBackupService bs) {
		try {
		Log.d(TAG, "invoking doBackup() on " + backupIntent);
		Log.d(TAG, "processOneBackup doBackup() on " + name);

		BackupRequest request;
		synchronized (mQueueLock) {
		request = mBackupQueue.get(0);
		}

		// !!! TODO right now these naming schemes limit applications to
		// one backup service per package
		File savedStateName = new File(mStateDir,
		request.service.packageName);
		File backupDataName = new File(mDataDir,
		request.service.packageName + ".data");
		File newStateName = new File(mStateDir,
		request.service.packageName + ".new");
		File savedStateName = new File(mStateDir, request.service.packageName);
		File backupDataName = new File(mDataDir, request.service.packageName + ".data");
		File newStateName = new File(mStateDir, request.service.packageName + ".new");

		// In a full backup, we pass a null ParcelFileDescriptor as
		// the saved-state "file"
		@@ -152,9 +250,12 @@ class BackupManagerService extends IBackupManager.Stub {

		// Run the target's backup pass
		try {
		mTargetService.doBackup(savedState, backupData, newState);
		// TODO: Make this oneway
		bs.doBackup(savedState, backupData, newState);
		} finally {
		if (savedState != null) {
		savedState.close();
		}
		backupData.close();
		newState.close();
		}
		@@ -170,103 +271,17 @@ class BackupManagerService extends IBackupManager.Stub {
		Log.d(TAG, "File not found on backup: ");
		fnf.printStackTrace();
		} catch (RemoteException e) {
		Log.d(TAG, "Remote target " + backupIntent
		+ " threw during backup:");
		Log.d(TAG, "Remote target " + name + " threw during backup:");
		e.printStackTrace();
		} catch (Exception e) {
		Log.w(TAG, "Final exception guard in backup: ");
		e.printStackTrace();
		}
		mContext.unbindService(this);
		}
		} else {
		Log.d(TAG, "Unable to bind to " + backupIntent);
		}
		}
		}
		break;
		}
		}

		public void onServiceConnected(ComponentName name, IBinder service) {
		synchronized (mBindSignaller) {
		mTargetService = IBackupService.Stub.asInterface(service);
		mBinding = false;
		mBindSignaller.notifyAll();
		}
		}

		public void onServiceDisconnected(ComponentName name) {
		synchronized (mBindSignaller) {
		mTargetService = null;
		mBinding = false;
		mBindSignaller.notifyAll();
		}
		}
		}

		public BackupManagerService(Context context) {
		mContext = context;
		mPackageManager = context.getPackageManager();

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

		// Build our mapping of uid to backup client services
		synchronized (mBackupParticipants) {
		addPackageParticipantsLocked(null);
		}

		// Register for broadcasts about package install, etc., so we can
		// update the provider list.
		IntentFilter filter = new IntentFilter();
		filter.addAction(Intent.ACTION_PACKAGE_ADDED);
		filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
		filter.addDataScheme("package");
		mContext.registerReceiver(mBroadcastReceiver, filter);
		}

		// ----- Track installation/removal of packages -----
		BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
		public void onReceive(Context context, Intent intent) {
		if (DEBUG) Log.d(TAG, "Received broadcast " + intent);

		Uri uri = intent.getData();
		if (uri == null) {
		return;
		}
		String pkgName = uri.getSchemeSpecificPart();
		if (pkgName == null) {
		return;
		}

		String action = intent.getAction();
		if (Intent.ACTION_PACKAGE_ADDED.equals(action)) {
		synchronized (mBackupParticipants) {
		Bundle extras = intent.getExtras();
		if (extras != null && extras.getBoolean(Intent.EXTRA_REPLACING, false)) {
		// The package was just upgraded
		updatePackageParticipantsLocked(pkgName);
		} else {
		// The package was just added
		addPackageParticipantsLocked(pkgName);
		}
		}
		}
		else if (Intent.ACTION_PACKAGE_REMOVED.equals(action)) {
		Bundle extras = intent.getExtras();
		if (extras != null && extras.getBoolean(Intent.EXTRA_REPLACING, false)) {
		// The package is being updated. We'll receive a PACKAGE_ADDED shortly.
		} else {
		synchronized (mBackupParticipants) {
		removePackageParticipantsLocked(pkgName);
		}
		}
		synchronized (mQueueLock) {
		mBackupQueue.remove(0);
		}
		mContext.unbindService(mBackupHandler);
		}
		};

		// Add the backup services in the given package to our set of known backup participants.
		// If 'packageName' is null, adds all backup services in the system.
		@@ -305,7 +320,8 @@ class BackupManagerService extends IBackupManager.Stub {
		removePackageParticipantsLockedInner(packageName, services);
		}

		private void removePackageParticipantsLockedInner(String packageName, List<ResolveInfo> services) {
		private void removePackageParticipantsLockedInner(String packageName,
		List<ResolveInfo> services) {
		for (ResolveInfo ri : services) {
		if (packageName == null \|\| ri.serviceInfo.packageName.equals(packageName)) {
		int uid = ri.serviceInfo.applicationInfo.uid;
		@@ -353,12 +369,13 @@ class BackupManagerService extends IBackupManager.Stub {
		// validate the caller-supplied package name against the known set of
		// packages associated with this uid
		if (service.packageName.equals(packageName)) {
		// add the caller to the set of pending backups
		if (mPendingBackups.add(new BackupRequest(service, false))) {
		// Add the caller to the set of pending backups. If there is
		// one already there, then overwrite it, but no harm done.
		mPendingBackups.put(new ComponentName(service.packageName, service.name),
		new BackupRequest(service, true));
		// !!! TODO: write to the pending-backup journal file in case of crash
		}
		}
		}

		Log.d(TAG, "Scheduling backup for " + mPendingBackups.size() + " participants");
		// Schedule a backup pass in a few minutes. As backup-eligible data
		@@ -381,7 +398,8 @@ class BackupManagerService extends IBackupManager.Stub {
		HashSet<ServiceInfo> servicesAtUid = mBackupParticipants.get(uid);
		for (ServiceInfo service: servicesAtUid) {
		if (service.packageName.equals(packageName)) {
		mPendingBackups.add(new BackupRequest(service, true));
		mPendingBackups.put(new ComponentName(service.packageName, service.name),
		new BackupRequest(service, true));
		}
		}
		}

tests/backup/src/com/android/backuptest/BackupTestService.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -14,7 +14,7 @@
		* limitations under the License.
		*/

		package com.example.android.apis.app;
		package com.android.backuptest;

		import android.backup.BackupService;
		import android.os.ParcelFileDescriptor;