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Use ReentrantReadWriteLock in ExpandableBinaryDictionary. 

Bug: 8187060
Change-Id: Ic665f0a5e940708aa9addedac068a64900b307e7
main
Keisuke Kuroyanagi 2014-04-28 20:56:01 +09:00
parent 570602a088
commit 1737b7ff5c
3 changed files with 131 additions and 126 deletions
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3
java/src/com/android/inputmethod/latin/ContactsBinaryDictionary.java
View File

@ -87,9 +87,6 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
mLocale = locale;
mUseFirstLastBigrams = useFirstLastBigramsForLocale(locale);
registerObserver(context);
// Load the current binary dictionary from internal storage. If no binary dictionary exists,
// reloadDictionaryIfRequired will start a new thread to generate one asynchronously.
reloadDictionaryIfRequired();
}

253
java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
View File

@ -26,7 +26,6 @@ import com.android.inputmethod.latin.makedict.FormatSpec;
import com.android.inputmethod.latin.makedict.UnsupportedFormatException;
import com.android.inputmethod.latin.makedict.WordProperty;
import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
import com.android.inputmethod.latin.utils.AsyncResultHolder;
import com.android.inputmethod.latin.utils.CombinedFormatUtils;
import com.android.inputmethod.latin.utils.ExecutorUtils;
import com.android.inputmethod.latin.utils.FileUtils;
@ -40,6 +39,8 @@ import java.util.Map;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
/**
* Abstract base class for an expandable dictionary that can be created and updated dynamically
@ -59,7 +60,6 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
private static final boolean DBG_STRESS_TEST = false;
private static final int TIMEOUT_FOR_READ_OPS_IN_MILLISECONDS = 100;
private static final int TIMEOUT_FOR_READ_OPS_FOR_TESTS_IN_MILLISECONDS = 10000;
private static final int DEFAULT_MAX_UNIGRAM_COUNT = 10000;
private static final int DEFAULT_MAX_BIGRAM_COUNT = 10000;
@ -93,9 +93,13 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
/** Dictionary file */
private final File mDictFile;
private final AtomicBoolean mProcessingLargeTask;
/** Indicates whether a task for reloading the dictionary has been scheduled. */
private final AtomicBoolean mIsReloading;
/** Indicates whether the current dictionary needs to be reloaded. */
private boolean mNeedsToReload;
private final ReentrantReadWriteLock mLock;
/* A extension for a binary dictionary file. */
protected static final String DICT_FILE_EXTENSION = ".dict";
@ -144,8 +148,9 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
mLocale = locale;
mDictFile = getDictFile(context, dictName, dictFile);
mBinaryDictionary = null;
mProcessingLargeTask = new AtomicBoolean();
mIsReloading = new AtomicBoolean();
mNeedsToReload = false;
mLock = new ReentrantReadWriteLock();
}
public static File getDictFile(final Context context, final String dictName,
@ -159,12 +164,30 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
return dictFile != null ? dictFile.getName() : name + "." + locale.toString();
}
private void asyncExecuteTaskWithWriteLock(final Runnable task) {
asyncExecuteTaskWithLock(mLock.writeLock(), task);
}
private void asyncExecuteTaskWithLock(final Lock lock, final Runnable task) {
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
@Override
public void run() {
lock.lock();
try {
task.run();
} finally {
lock.unlock();
}
}
});
}
/**
* Closes and cleans up the binary dictionary.
*/
@Override
public void close() {
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
asyncExecuteTaskWithWriteLock(new Runnable() {
@Override
public void run() {
if (mBinaryDictionary != null) {
@ -188,6 +211,15 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
return attributeMap;
}
private void removeBinaryDictionary() {
asyncExecuteTaskWithWriteLock(new Runnable() {
@Override
public void run() {
removeBinaryDictionaryLocked();
}
});
}
private void removeBinaryDictionaryLocked() {
if (mBinaryDictionary != null) {
mBinaryDictionary.close();
@ -211,7 +243,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
}
public void clear() {
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
asyncExecuteTaskWithWriteLock(new Runnable() {
@Override
public void run() {
removeBinaryDictionaryLocked();
@ -224,13 +256,13 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
* Check whether GC is needed and run GC if required.
*/
protected void runGCIfRequired(final boolean mindsBlockByGC) {
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
asyncExecuteTaskWithWriteLock(new Runnable() {
@Override
public void run() {
if (mBinaryDictionary == null) {
return;
}
runGCAfterAllPrioritizedTasksIfRequiredLocked(mindsBlockByGC);
runGCIfRequiredLocked(mindsBlockByGC);
}
});
}
@ -241,25 +273,6 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
}
}
private void runGCAfterAllPrioritizedTasksIfRequiredLocked(final boolean mindsBlockByGC) {
// needsToRunGC() have to be called with lock.
if (mBinaryDictionary.needsToRunGC(mindsBlockByGC)) {
if (setProcessingLargeTaskIfNot()) {
// Run GC after currently existing time sensitive operations.
ExecutorUtils.getExecutor(mDictName).executePrioritized(new Runnable() {
@Override
public void run() {
try {
mBinaryDictionary.flushWithGC();
} finally {
mProcessingLargeTask.set(false);
}
}
});
}
}
}
/**
* Dynamically adds a word unigram to the dictionary. May overwrite an existing entry.
*/
@ -267,13 +280,13 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
final String shortcutTarget, final int shortcutFreq, final boolean isNotAWord,
final boolean isBlacklisted, final int timestamp) {
reloadDictionaryIfRequired();
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
asyncExecuteTaskWithWriteLock(new Runnable() {
@Override
public void run() {
if (mBinaryDictionary == null) {
return;
}
runGCAfterAllPrioritizedTasksIfRequiredLocked(true /* mindsBlockByGC */);
runGCIfRequiredLocked(true /* mindsBlockByGC */);
addWordDynamicallyLocked(word, frequency, shortcutTarget, shortcutFreq,
isNotAWord, isBlacklisted, timestamp);
}
@ -293,13 +306,13 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
public void addBigramDynamically(final String word0, final String word1,
final int frequency, final int timestamp) {
reloadDictionaryIfRequired();
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
asyncExecuteTaskWithWriteLock(new Runnable() {
@Override
public void run() {
if (mBinaryDictionary == null) {
return;
}
runGCAfterAllPrioritizedTasksIfRequiredLocked(true /* mindsBlockByGC */);
runGCIfRequiredLocked(true /* mindsBlockByGC */);
addBigramDynamicallyLocked(word0, word1, frequency, timestamp);
}
});
@ -315,13 +328,13 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
*/
public void removeBigramDynamically(final String word0, final String word1) {
reloadDictionaryIfRequired();
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
asyncExecuteTaskWithWriteLock(new Runnable() {
@Override
public void run() {
if (mBinaryDictionary == null) {
return;
}
runGCAfterAllPrioritizedTasksIfRequiredLocked(true /* mindsBlockByGC */);
runGCIfRequiredLocked(true /* mindsBlockByGC */);
mBinaryDictionary.removeBigramWords(word0, word1);
}
});
@ -338,14 +351,13 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
final ArrayList<LanguageModelParam> languageModelParams,
final AddMultipleDictionaryEntriesCallback callback) {
reloadDictionaryIfRequired();
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
asyncExecuteTaskWithWriteLock(new Runnable() {
@Override
public void run() {
if (mBinaryDictionary == null) {
return;
}
final boolean locked = setProcessingLargeTaskIfNot();
try {
if (mBinaryDictionary == null) {
return;
}
mBinaryDictionary.addMultipleDictionaryEntries(
languageModelParams.toArray(
new LanguageModelParam[languageModelParams.size()]));
@ -353,9 +365,6 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
if (callback != null) {
callback.onFinished();
}
if (locked) {
mProcessingLargeTask.set(false);
}
}
}
});
@ -367,29 +376,33 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
final int sessionId, final float[] inOutLanguageWeight) {
reloadDictionaryIfRequired();
if (processingLargeTask()) {
return null;
}
final AsyncResultHolder<ArrayList<SuggestedWordInfo>> holder =
new AsyncResultHolder<ArrayList<SuggestedWordInfo>>();
ExecutorUtils.getExecutor(mDictName).executePrioritized(new Runnable() {
@Override
public void run() {
boolean lockAcquired = false;
try {
lockAcquired = mLock.readLock().tryLock(
TIMEOUT_FOR_READ_OPS_IN_MILLISECONDS, TimeUnit.MILLISECONDS);
if (lockAcquired) {
if (mBinaryDictionary == null) {
holder.set(null);
return;
return null;
}
final ArrayList<SuggestedWordInfo> binarySuggestion =
final ArrayList<SuggestedWordInfo> suggestions =
mBinaryDictionary.getSuggestionsWithSessionId(composer, prevWord,
proximityInfo, blockOffensiveWords, additionalFeaturesOptions,
sessionId, inOutLanguageWeight);
holder.set(binarySuggestion);
if (mBinaryDictionary.isCorrupted()) {
removeBinaryDictionaryLocked();
Log.i(TAG, "Dictionary (" + mDictName +") is corrupted. "
+ "Remove and regenerate it.");
removeBinaryDictionary();
}
return suggestions;
}
});
return holder.get(null, TIMEOUT_FOR_READ_OPS_IN_MILLISECONDS);
} catch (final InterruptedException e) {
Log.e(TAG, "Interrupted tryLock() in getSuggestionsWithSessionId().", e);
} finally {
if (lockAcquired) {
mLock.readLock().unlock();
}
}
return null;
}
@Override
@ -404,17 +417,24 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
@Override
public boolean isValidWord(final String word) {
reloadDictionaryIfRequired();
if (processingLargeTask()) {
return false;
}
final AsyncResultHolder<Boolean> holder = new AsyncResultHolder<Boolean>();
ExecutorUtils.getExecutor(mDictName).executePrioritized(new Runnable() {
@Override
public void run() {
holder.set(isValidWordLocked(word));
boolean lockAcquired = false;
try {
lockAcquired = mLock.readLock().tryLock(
TIMEOUT_FOR_READ_OPS_IN_MILLISECONDS, TimeUnit.MILLISECONDS);
if (lockAcquired) {
if (mBinaryDictionary == null) {
return false;
}
return isValidWordLocked(word);
}
});
return holder.get(false, TIMEOUT_FOR_READ_OPS_IN_MILLISECONDS);
} catch (final InterruptedException e) {
Log.e(TAG, "Interrupted tryLock() in isValidWord().", e);
} finally {
if (lockAcquired) {
mLock.readLock().unlock();
}
}
return false;
}
protected boolean isValidWordLocked(final String word) {
@ -484,13 +504,14 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
}
/**
* Reloads the dictionary if required.
* Load the current binary dictionary from internal storage. If the dictionary file doesn't
* exists or needs to be regenerated, the new dictionary file will be asynchronously generated.
* However, the dictionary itself is accessible even before the new dictionary file is actually
* generated. It may return a null result for getSuggestions() in that case by design.
*/
public final void reloadDictionaryIfRequired() {
if (!isReloadRequired()) return;
if (setProcessingLargeTaskIfNot()) {
reloadDictionary();
}
asyncReloadDictionary();
}
/**
@ -500,52 +521,39 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
return mBinaryDictionary == null || mNeedsToReload;
}
private boolean processingLargeTask() {
return mProcessingLargeTask.get();
}
// Returns whether the dictionary is being used for a large task. If true, we should not use
// this dictionary for latency sensitive operations.
private boolean setProcessingLargeTaskIfNot() {
return mProcessingLargeTask.compareAndSet(false /* expect */ , true /* update */);
}
/**
* Reloads the dictionary. Access is controlled on a per dictionary file basis and supports
* concurrent calls from multiple instances that share the same dictionary file.
* Reloads the dictionary. Access is controlled on a per dictionary file basis.
*/
private final void reloadDictionary() {
// Ensure that only one thread attempts to read or write to the shared binary dictionary
// file at the same time.
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
@Override
public void run() {
try {
if (!dictionaryFileExists() || haveContentsChanged()) {
// If the shared dictionary file does not exist or is out of date and
// contents have been updated, the first instance that acquires the lock
// will generate a new one
createNewDictionaryLocked();
} else if (mBinaryDictionary == null) {
// Otherwise, if the local dictionary is older than the shared dictionary,
// load the shared dictionary.
loadBinaryDictionaryLocked();
private final void asyncReloadDictionary() {
if (mIsReloading.compareAndSet(false, true)) {
mNeedsToReload = false;
asyncExecuteTaskWithWriteLock(new Runnable() {
@Override
public void run() {
try {
if (!dictionaryFileExists() || haveContentsChanged()) {
// If the shared dictionary file does not exist or contents have been
// updated, generate a new one.
createNewDictionaryLocked();
} else if (mBinaryDictionary == null) {
// Otherwise, load the existing dictionary.
loadBinaryDictionaryLocked();
}
if (mBinaryDictionary != null && !(isValidDictionaryLocked()
// TODO: remove the check below
&& matchesExpectedBinaryDictFormatVersionForThisType(
mBinaryDictionary.getFormatVersion()))) {
// Binary dictionary or its format version is not valid. Regenerate
// the dictionary file. writeBinaryDictionary will remove the
// existing files if appropriate.
createNewDictionaryLocked();
}
} finally {
mIsReloading.set(false);
}
mNeedsToReload = false;
if (mBinaryDictionary != null && !(isValidDictionaryLocked()
// TODO: remove the check below
&& matchesExpectedBinaryDictFormatVersionForThisType(
mBinaryDictionary.getFormatVersion()))) {
// Binary dictionary or its format version is not valid. Regenerate
// the dictionary file. writeBinaryDictionary will remove the
// existing files if appropriate.
createNewDictionaryLocked();
}
} finally {
mProcessingLargeTask.set(false);
}
}
});
});
}
}
// TODO: cache the file's existence so that we avoid doing a disk access each time.
@ -557,7 +565,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
* Flush binary dictionary to dictionary file.
*/
public void asyncFlushBinaryDictionary() {
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
asyncExecuteTaskWithWriteLock(new Runnable() {
@Override
public void run() {
flushDictionaryLocked();
@ -568,16 +576,15 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
// TODO: Implement BinaryDictionary.isInDictionary().
@UsedForTesting
public boolean isInUnderlyingBinaryDictionaryForTests(final String word) {
final AsyncResultHolder<Boolean> holder = new AsyncResultHolder<Boolean>();
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
@Override
public void run() {
if (mDictType == Dictionary.TYPE_USER_HISTORY) {
holder.set(mBinaryDictionary.isValidWord(word));
}
mLock.readLock().lock();
try {
if (mBinaryDictionary != null && mDictType == Dictionary.TYPE_USER_HISTORY) {
return mBinaryDictionary.isValidWord(word);
}
});
return holder.get(false, TIMEOUT_FOR_READ_OPS_FOR_TESTS_IN_MILLISECONDS);
return false;
} finally {
mLock.readLock().unlock();
}
}
@UsedForTesting
@ -599,7 +606,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
@UsedForTesting
public void dumpAllWordsForDebug() {
reloadDictionaryIfRequired();
ExecutorUtils.getExecutor(mDictName).execute(new Runnable() {
asyncExecuteTaskWithLock(mLock.readLock(), new Runnable() {
@Override
public void run() {
Log.d(TAG, "Dump dictionary: " + mDictName);

1
tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java
View File

@ -264,6 +264,7 @@ public class UserHistoryDictionaryTests extends AndroidTestCase {
for (final String word : words) {
UserHistoryDictionary.addToDictionary(dict, prevWord, word, true, mCurrentTime);
prevWord = word;
dict.waitAllTasksForTests();
assertTrue(dict.isInUnderlyingBinaryDictionaryForTests(word));
}
forcePassingShortTime();