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Spell checker uses cache of size 1.

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This is a step in the direction of removing the LRU cache completely.

Change-Id: I8886f7ef74e6b1b35135e68f169cb461682964e9
This commit is contained in:
Dan Zivkovic 2015-02-19 17:09:03 -08:00
parent 40b754565c
commit 29aa3df3da
3 changed files with 21 additions and 93 deletions
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93
java/src/com/android/inputmethod/latin/DictionaryFacilitatorLruCache.java
View file

@ -16,15 +16,11 @@
package com.android.inputmethod.latin;
import java.util.HashSet;
import java.util.Locale;
import java.util.concurrent.TimeUnit;
import com.android.inputmethod.annotations.UsedForTesting;
import android.content.Context;
import android.util.Log;
import android.util.LruCache;
/**
* Cache for dictionary facilitators of multiple locales.
@ -32,54 +28,20 @@ import android.util.LruCache;
*/
public class DictionaryFacilitatorLruCache {
private static final String TAG = "DictionaryFacilitatorLruCache";
private static final int MAX_DICTIONARY_FACILITATOR_COUNT = 3;
private static final int WAIT_FOR_LOADING_MAIN_DICT_IN_MILLISECONDS = 1000;
private static final int MAX_RETRY_COUNT_FOR_WAITING_FOR_LOADING_DICT = 5;
/**
* Class extends LruCache. This class tracks cached locales and closes evicted dictionaries by
* overriding entryRemoved.
*/
private static class DictionaryFacilitatorLruCacheInner extends
LruCache<Locale, DictionaryFacilitator> {
private final HashSet<Locale> mCachedLocales;
public DictionaryFacilitatorLruCacheInner(final HashSet<Locale> cachedLocales,
final int maxSize) {
super(maxSize);
mCachedLocales = cachedLocales;
}
@Override
protected void entryRemoved(boolean evicted, Locale key,
DictionaryFacilitator oldValue, DictionaryFacilitator newValue) {
if (oldValue != null && oldValue != newValue) {
oldValue.closeDictionaries();
}
if (key != null && newValue == null) {
// Remove locale from the cache when the dictionary facilitator for the locale is
// evicted and new facilitator is not set for the locale.
mCachedLocales.remove(key);
if (size() >= maxSize()) {
Log.w(TAG, "DictionaryFacilitator for " + key.toString()
+ " has been evicted due to cache size limit."
+ " size: " + size() + ", maxSize: " + maxSize());
}
}
}
}
private final Context mContext;
private final HashSet<Locale> mCachedLocales = new HashSet<>();
private final String mDictionaryNamePrefix;
private final DictionaryFacilitatorLruCacheInner mLruCache;
private final Object mLock = new Object();
private final DictionaryFacilitator mDictionaryFacilitator;
private boolean mUseContactsDictionary = false;
private Locale mLocale;
public DictionaryFacilitatorLruCache(final Context context, final String dictionaryNamePrefix) {
mContext = context;
mLruCache = new DictionaryFacilitatorLruCacheInner(
mCachedLocales, MAX_DICTIONARY_FACILITATOR_COUNT);
mDictionaryNamePrefix = dictionaryNamePrefix;
mDictionaryFacilitator = DictionaryFacilitatorProvider.getDictionaryFacilitator();
}
private static void waitForLoadingMainDictionary(
@ -101,59 +63,40 @@ public class DictionaryFacilitatorLruCache {
}
}
private void resetDictionariesForLocaleLocked(final DictionaryFacilitator dictionaryFacilitator,
final Locale locale) {
private void resetDictionariesForLocaleLocked() {
// Note: Given that personalized dictionaries are not used here; we can pass null account.
dictionaryFacilitator.resetDictionaries(mContext, new Locale[]{locale},
mDictionaryFacilitator.resetDictionaries(mContext, new Locale[]{mLocale},
mUseContactsDictionary, false /* usePersonalizedDicts */,
false /* forceReloadMainDictionary */, null /* account */,
mDictionaryNamePrefix, null /* listener */);
}
public void setUseContactsDictionary(final boolean useContectsDictionary) {
if (mUseContactsDictionary == useContectsDictionary) {
// The value has not been changed.
return;
}
synchronized (mLock) {
mUseContactsDictionary = useContectsDictionary;
for (final Locale locale : mCachedLocales) {
final DictionaryFacilitator dictionaryFacilitator = mLruCache.get(locale);
resetDictionariesForLocaleLocked(dictionaryFacilitator, locale);
waitForLoadingMainDictionary(dictionaryFacilitator);
if (mUseContactsDictionary == useContectsDictionary) {
// The value has not been changed.
return;
}
mUseContactsDictionary = useContectsDictionary;
resetDictionariesForLocaleLocked();
waitForLoadingMainDictionary(mDictionaryFacilitator);
}
}
public DictionaryFacilitator get(final Locale locale) {
DictionaryFacilitator dictionaryFacilitator = mLruCache.get(locale);
if (dictionaryFacilitator != null) {
// dictionary facilitator for the locale is in the cache.
return dictionaryFacilitator;
}
synchronized (mLock) {
dictionaryFacilitator = mLruCache.get(locale);
if (dictionaryFacilitator != null) {
return dictionaryFacilitator;
if (!mDictionaryFacilitator.isForLocales(new Locale[]{locale})) {
mLocale = locale;
resetDictionariesForLocaleLocked();
}
dictionaryFacilitator = DictionaryFacilitatorProvider.getDictionaryFacilitator();
resetDictionariesForLocaleLocked(dictionaryFacilitator, locale);
waitForLoadingMainDictionary(dictionaryFacilitator);
mLruCache.put(locale, dictionaryFacilitator);
mCachedLocales.add(locale);
return dictionaryFacilitator;
waitForLoadingMainDictionary(mDictionaryFacilitator);
return mDictionaryFacilitator;
}
}
public void evictAll() {
public void closeDictionaries() {
synchronized (mLock) {
mLruCache.evictAll();
mCachedLocales.clear();
mDictionaryFacilitator.closeDictionaries();
}
}
@UsedForTesting
HashSet<Locale> getCachedLocalesForTesting() {
return mCachedLocales;
}
}

6
java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerService.java
View file

@ -140,8 +140,8 @@ public final class AndroidSpellCheckerService extends SpellCheckerService
@Override
public void onSharedPreferenceChanged(final SharedPreferences prefs, final String key) {
if (!PREF_USE_CONTACTS_KEY.equals(key)) return;
final boolean useContactsDictionary = prefs.getBoolean(PREF_USE_CONTACTS_KEY, true);
mDictionaryFacilitatorCache.setUseContactsDictionary(useContactsDictionary);
final boolean useContactsDictionary = prefs.getBoolean(PREF_USE_CONTACTS_KEY, true);
mDictionaryFacilitatorCache.setUseContactsDictionary(useContactsDictionary);
}
@Override
@ -226,7 +226,7 @@ public final class AndroidSpellCheckerService extends SpellCheckerService
public boolean onUnbind(final Intent intent) {
mSemaphore.acquireUninterruptibly(MAX_NUM_OF_THREADS_READ_DICTIONARY);
try {
mDictionaryFacilitatorCache.evictAll();
mDictionaryFacilitatorCache.closeDictionaries();
} finally {
mSemaphore.release(MAX_NUM_OF_THREADS_READ_DICTIONARY);
}

15
tests/src/com/android/inputmethod/latin/DictionaryFacilitatorLruCacheTests.java
View file

@ -23,21 +23,6 @@ import android.test.suitebuilder.annotation.LargeTest;
@LargeTest
public class DictionaryFacilitatorLruCacheTests extends AndroidTestCase {
public void testCacheSize() {
final DictionaryFacilitatorLruCache cache =
new DictionaryFacilitatorLruCache(getContext(), "");
assertEquals(0, cache.getCachedLocalesForTesting().size());
assertNotNull(cache.get(Locale.US));
assertEquals(1, cache.getCachedLocalesForTesting().size());
assertNotNull(cache.get(Locale.UK));
assertEquals(2, cache.getCachedLocalesForTesting().size());
assertNotNull(cache.get(Locale.FRENCH));
assertEquals(2, cache.getCachedLocalesForTesting().size());
cache.evictAll();
assertEquals(0, cache.getCachedLocalesForTesting().size());
}
public void testGetFacilitator() {
final DictionaryFacilitatorLruCache cache =
new DictionaryFacilitatorLruCache(getContext(), "");