Merge "Frameworks: Clean up SharedPreferencesImpl" am: 572f46a3ef (9a612c73) · Commits · e / os / android_frameworks_base

core/java/android/app/SharedPreferencesImpl.java

+48 −30

Original line number	Original line	Diff line number	Diff line
	@@ -34,8 +34,6 @@ import dalvik.system.BlockGuard;

	import libcore.io.IoUtils;		import libcore.io.IoUtils;

	import com.google.android.collect.Maps;

	import org.xmlpull.v1.XmlPullParserException;		import org.xmlpull.v1.XmlPullParserException;

	import java.io.BufferedInputStream;		import java.io.BufferedInputStream;
	@@ -139,7 +137,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	Log.w(TAG, "Attempt to read preferences file " + mFile + " without permission");		Log.w(TAG, "Attempt to read preferences file " + mFile + " without permission");
	}		}

	Map map = null;		Map<String, Object> map = null;
	StructStat stat = null;		StructStat stat = null;
	try {		try {
	stat = Os.stat(mFile.getPath());		stat = Os.stat(mFile.getPath());
	@@ -148,7 +146,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	try {		try {
	str = new BufferedInputStream(		str = new BufferedInputStream(
	new FileInputStream(mFile), 16*1024);		new FileInputStream(mFile), 16*1024);
	map = XmlUtils.readMapXml(str);		map = (Map<String, Object>) XmlUtils.readMapXml(str);
	} catch (Exception e) {		} catch (Exception e) {
	Log.w(TAG, "Cannot read " + mFile.getAbsolutePath(), e);		Log.w(TAG, "Cannot read " + mFile.getAbsolutePath(), e);
	} finally {		} finally {
	@@ -214,12 +212,14 @@ final class SharedPreferencesImpl implements SharedPreferences {
	}		}
	}		}

			@Override
	public void registerOnSharedPreferenceChangeListener(OnSharedPreferenceChangeListener listener) {		public void registerOnSharedPreferenceChangeListener(OnSharedPreferenceChangeListener listener) {
	synchronized(mLock) {		synchronized(mLock) {
	mListeners.put(listener, CONTENT);		mListeners.put(listener, CONTENT);
	}		}
	}		}

			@Override
	public void unregisterOnSharedPreferenceChangeListener(OnSharedPreferenceChangeListener listener) {		public void unregisterOnSharedPreferenceChangeListener(OnSharedPreferenceChangeListener listener) {
	synchronized(mLock) {		synchronized(mLock) {
	mListeners.remove(listener);		mListeners.remove(listener);
	@@ -241,6 +241,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	}		}
	}		}

			@Override
	public Map<String, ?> getAll() {		public Map<String, ?> getAll() {
	synchronized (mLock) {		synchronized (mLock) {
	awaitLoadedLocked();		awaitLoadedLocked();
	@@ -249,6 +250,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	}		}
	}		}

			@Override
	@Nullable		@Nullable
	public String getString(String key, @Nullable String defValue) {		public String getString(String key, @Nullable String defValue) {
	synchronized (mLock) {		synchronized (mLock) {
	@@ -258,6 +260,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	}		}
	}		}

			@Override
	@Nullable		@Nullable
	public Set<String> getStringSet(String key, @Nullable Set<String> defValues) {		public Set<String> getStringSet(String key, @Nullable Set<String> defValues) {
	synchronized (mLock) {		synchronized (mLock) {
	@@ -267,6 +270,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	}		}
	}		}

			@Override
	public int getInt(String key, int defValue) {		public int getInt(String key, int defValue) {
	synchronized (mLock) {		synchronized (mLock) {
	awaitLoadedLocked();		awaitLoadedLocked();
	@@ -274,6 +278,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	return v != null ? v : defValue;		return v != null ? v : defValue;
	}		}
	}		}
			@Override
	public long getLong(String key, long defValue) {		public long getLong(String key, long defValue) {
	synchronized (mLock) {		synchronized (mLock) {
	awaitLoadedLocked();		awaitLoadedLocked();
	@@ -281,6 +286,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	return v != null ? v : defValue;		return v != null ? v : defValue;
	}		}
	}		}
			@Override
	public float getFloat(String key, float defValue) {		public float getFloat(String key, float defValue) {
	synchronized (mLock) {		synchronized (mLock) {
	awaitLoadedLocked();		awaitLoadedLocked();
	@@ -288,6 +294,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	return v != null ? v : defValue;		return v != null ? v : defValue;
	}		}
	}		}
			@Override
	public boolean getBoolean(String key, boolean defValue) {		public boolean getBoolean(String key, boolean defValue) {
	synchronized (mLock) {		synchronized (mLock) {
	awaitLoadedLocked();		awaitLoadedLocked();
	@@ -296,6 +303,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	}		}
	}		}

			@Override
	public boolean contains(String key) {		public boolean contains(String key) {
	synchronized (mLock) {		synchronized (mLock) {
	awaitLoadedLocked();		awaitLoadedLocked();
	@@ -303,6 +311,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	}		}
	}		}

			@Override
	public Editor edit() {		public Editor edit() {
	// TODO: remove the need to call awaitLoadedLocked() when		// TODO: remove the need to call awaitLoadedLocked() when
	// requesting an editor. will require some work on the		// requesting an editor. will require some work on the
	@@ -347,71 +356,81 @@ final class SharedPreferencesImpl implements SharedPreferences {
	}		}

	public final class EditorImpl implements Editor {		public final class EditorImpl implements Editor {
	private final Object mLock = new Object();		private final Object mEditorLock = new Object();

	@GuardedBy("mLock")		@GuardedBy("mEditorLock")
	private final Map<String, Object> mModified = Maps.newHashMap();		private final Map<String, Object> mModified = new HashMap<>();

	@GuardedBy("mLock")		@GuardedBy("mEditorLock")
	private boolean mClear = false;		private boolean mClear = false;

			@Override
	public Editor putString(String key, @Nullable String value) {		public Editor putString(String key, @Nullable String value) {
	synchronized (mLock) {		synchronized (mEditorLock) {
	mModified.put(key, value);		mModified.put(key, value);
	return this;		return this;
	}		}
	}		}
			@Override
	public Editor putStringSet(String key, @Nullable Set<String> values) {		public Editor putStringSet(String key, @Nullable Set<String> values) {
	synchronized (mLock) {		synchronized (mEditorLock) {
	mModified.put(key,		mModified.put(key,
	(values == null) ? null : new HashSet<String>(values));		(values == null) ? null : new HashSet<String>(values));
	return this;		return this;
	}		}
	}		}
			@Override
	public Editor putInt(String key, int value) {		public Editor putInt(String key, int value) {
	synchronized (mLock) {		synchronized (mEditorLock) {
	mModified.put(key, value);		mModified.put(key, value);
	return this;		return this;
	}		}
	}		}
			@Override
	public Editor putLong(String key, long value) {		public Editor putLong(String key, long value) {
	synchronized (mLock) {		synchronized (mEditorLock) {
	mModified.put(key, value);		mModified.put(key, value);
	return this;		return this;
	}		}
	}		}
			@Override
	public Editor putFloat(String key, float value) {		public Editor putFloat(String key, float value) {
	synchronized (mLock) {		synchronized (mEditorLock) {
	mModified.put(key, value);		mModified.put(key, value);
	return this;		return this;
	}		}
	}		}
			@Override
	public Editor putBoolean(String key, boolean value) {		public Editor putBoolean(String key, boolean value) {
	synchronized (mLock) {		synchronized (mEditorLock) {
	mModified.put(key, value);		mModified.put(key, value);
	return this;		return this;
	}		}
	}		}

			@Override
	public Editor remove(String key) {		public Editor remove(String key) {
	synchronized (mLock) {		synchronized (mEditorLock) {
	mModified.put(key, this);		mModified.put(key, this);
	return this;		return this;
	}		}
	}		}

			@Override
	public Editor clear() {		public Editor clear() {
	synchronized (mLock) {		synchronized (mEditorLock) {
	mClear = true;		mClear = true;
	return this;		return this;
	}		}
	}		}

			@Override
	public void apply() {		public void apply() {
	final long startTime = System.currentTimeMillis();		final long startTime = System.currentTimeMillis();

	final MemoryCommitResult mcr = commitToMemory();		final MemoryCommitResult mcr = commitToMemory();
	final Runnable awaitCommit = new Runnable() {		final Runnable awaitCommit = new Runnable() {
			@Override
	public void run() {		public void run() {
	try {		try {
	mcr.writtenToDiskLatch.await();		mcr.writtenToDiskLatch.await();
	@@ -429,6 +448,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	QueuedWork.addFinisher(awaitCommit);		QueuedWork.addFinisher(awaitCommit);

	Runnable postWriteRunnable = new Runnable() {		Runnable postWriteRunnable = new Runnable() {
			@Override
	public void run() {		public void run() {
	awaitCommit.run();		awaitCommit.run();
	QueuedWork.removeFinisher(awaitCommit);		QueuedWork.removeFinisher(awaitCommit);
	@@ -471,13 +491,13 @@ final class SharedPreferencesImpl implements SharedPreferences {
	listeners = new HashSet<OnSharedPreferenceChangeListener>(mListeners.keySet());		listeners = new HashSet<OnSharedPreferenceChangeListener>(mListeners.keySet());
	}		}

	synchronized (mLock) {		synchronized (mEditorLock) {
	boolean changesMade = false;		boolean changesMade = false;

	if (mClear) {		if (mClear) {
	if (!mMap.isEmpty()) {		if (!mapToWriteToDisk.isEmpty()) {
	changesMade = true;		changesMade = true;
	mMap.clear();		mapToWriteToDisk.clear();
	}		}
	mClear = false;		mClear = false;
	}		}
	@@ -489,18 +509,18 @@ final class SharedPreferencesImpl implements SharedPreferences {
	// setting a value to "null" for a given key is specified to be		// setting a value to "null" for a given key is specified to be
	// equivalent to calling remove on that key.		// equivalent to calling remove on that key.
	if (v == this \|\| v == null) {		if (v == this \|\| v == null) {
	if (!mMap.containsKey(k)) {		if (!mapToWriteToDisk.containsKey(k)) {
	continue;		continue;
	}		}
	mMap.remove(k);		mapToWriteToDisk.remove(k);
	} else {		} else {
	if (mMap.containsKey(k)) {		if (mapToWriteToDisk.containsKey(k)) {
	Object existingValue = mMap.get(k);		Object existingValue = mapToWriteToDisk.get(k);
	if (existingValue != null && existingValue.equals(v)) {		if (existingValue != null && existingValue.equals(v)) {
	continue;		continue;
	}		}
	}		}
	mMap.put(k, v);		mapToWriteToDisk.put(k, v);
	}		}

	changesMade = true;		changesMade = true;
	@@ -522,6 +542,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	mapToWriteToDisk);		mapToWriteToDisk);
	}		}

			@Override
	public boolean commit() {		public boolean commit() {
	long startTime = 0;		long startTime = 0;

	@@ -564,11 +585,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	}		}
	} else {		} else {
	// Run this function on the main thread.		// Run this function on the main thread.
	ActivityThread.sMainThreadHandler.post(new Runnable() {		ActivityThread.sMainThreadHandler.post(() -> notifyListeners(mcr));
	public void run() {
	notifyListeners(mcr);
	}
	});
	}		}
	}		}
	}		}
	@@ -594,6 +611,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	final boolean isFromSyncCommit = (postWriteRunnable == null);		final boolean isFromSyncCommit = (postWriteRunnable == null);

	final Runnable writeToDiskRunnable = new Runnable() {		final Runnable writeToDiskRunnable = new Runnable() {
			@Override
	public void run() {		public void run() {
	synchronized (mWritingToDiskLock) {		synchronized (mWritingToDiskLock) {
	writeToFile(mcr, isFromSyncCommit);		writeToFile(mcr, isFromSyncCommit);
	@@ -646,7 +664,7 @@ final class SharedPreferencesImpl implements SharedPreferences {
	return str;		return str;
	}		}

	// Note: must hold mWritingToDiskLock		@GuardedBy("mWritingToDiskLock")
	private void writeToFile(MemoryCommitResult mcr, boolean isFromSyncCommit) {		private void writeToFile(MemoryCommitResult mcr, boolean isFromSyncCommit) {
	long startTime = 0;		long startTime = 0;
	long existsTime = 0;		long existsTime = 0;