am 4084fa5c: Refactor content provider code from ContactsDict

* commit '4084fa5caeee09ef7993957c5e922dab14c57f3f':
  Refactor content provider code from ContactsDict
main
Jatin Matani 2015-02-12 00:39:30 +00:00 committed by Android Git Automerger
commit 2a307fdd0a
8 changed files with 424 additions and 202 deletions

View File

@ -16,23 +16,16 @@
package com.android.inputmethod.latin; package com.android.inputmethod.latin;
import android.content.ContentResolver;
import android.content.Context; import android.content.Context;
import android.database.ContentObserver;
import android.database.Cursor;
import android.database.sqlite.SQLiteException;
import android.net.Uri; import android.net.Uri;
import android.os.SystemClock;
import android.provider.BaseColumns;
import android.provider.ContactsContract; import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts; import android.provider.ContactsContract.Contacts;
import android.util.Log; import android.util.Log;
import com.android.inputmethod.annotations.ExternallyReferenced; import com.android.inputmethod.annotations.ExternallyReferenced;
import com.android.inputmethod.latin.common.Constants; import com.android.inputmethod.latin.ContactsManager.ContactsChangedListener;
import com.android.inputmethod.latin.common.StringUtils; import com.android.inputmethod.latin.common.StringUtils;
import com.android.inputmethod.latin.personalization.AccountUtils; import com.android.inputmethod.latin.personalization.AccountUtils;
import com.android.inputmethod.latin.utils.ExecutorUtils;
import java.io.File; import java.io.File;
import java.util.ArrayList; import java.util.ArrayList;
@ -41,47 +34,27 @@ import java.util.Locale;
import javax.annotation.Nullable; import javax.annotation.Nullable;
public class ContactsBinaryDictionary extends ExpandableBinaryDictionary { public class ContactsBinaryDictionary extends ExpandableBinaryDictionary
implements ContactsChangedListener {
private static final String[] PROJECTION = {BaseColumns._ID, Contacts.DISPLAY_NAME};
private static final String[] PROJECTION_ID_ONLY = {BaseColumns._ID};
private static final String TAG = ContactsBinaryDictionary.class.getSimpleName(); private static final String TAG = ContactsBinaryDictionary.class.getSimpleName();
private static final String NAME = "contacts"; private static final String NAME = "contacts";
private static final boolean DEBUG = false; private static final boolean DEBUG = false;
private static final boolean DEBUG_DUMP = false; private static final boolean DEBUG_DUMP = false;
/**
* Frequency for contacts information into the dictionary
*/
private static final int FREQUENCY_FOR_CONTACTS = 40;
private static final int FREQUENCY_FOR_CONTACTS_BIGRAM = 90;
/** The maximum number of contacts that this dictionary supports. */
private static final int MAX_CONTACT_COUNT = 10000;
private static final int INDEX_NAME = 1;
/** The number of contacts in the most recent dictionary rebuild. */
private int mContactCountAtLastRebuild = 0;
/** The hash code of ArrayList of contacts names in the most recent dictionary rebuild. */
private int mHashCodeAtLastRebuild = 0;
private ContentObserver mObserver;
/** /**
* Whether to use "firstname lastname" in bigram predictions. * Whether to use "firstname lastname" in bigram predictions.
*/ */
private final boolean mUseFirstLastBigrams; private final boolean mUseFirstLastBigrams;
private final ContactsManager mContactsManager;
protected ContactsBinaryDictionary(final Context context, final Locale locale, protected ContactsBinaryDictionary(final Context context, final Locale locale,
final File dictFile, final String name) { final File dictFile, final String name) {
super(context, getDictName(name, locale, dictFile), locale, Dictionary.TYPE_CONTACTS, super(context, getDictName(name, locale, dictFile), locale, Dictionary.TYPE_CONTACTS,
dictFile); dictFile);
mUseFirstLastBigrams = useFirstLastBigramsForLocale(locale); mUseFirstLastBigrams = ContactsDictionaryUtils.useFirstLastBigramsForLocale(locale);
registerObserver(context); mContactsManager = new ContactsManager(context);
mContactsManager.registerForUpdates(this /* listener */);
reloadDictionaryIfRequired(); reloadDictionaryIfRequired();
} }
@ -92,34 +65,17 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
return new ContactsBinaryDictionary(context, locale, dictFile, dictNamePrefix + NAME); return new ContactsBinaryDictionary(context, locale, dictFile, dictNamePrefix + NAME);
} }
private synchronized void registerObserver(final Context context) {
if (mObserver != null) return;
ContentResolver cres = context.getContentResolver();
cres.registerContentObserver(Contacts.CONTENT_URI, true, mObserver =
new ContentObserver(null) {
@Override
public void onChange(boolean self) {
ExecutorUtils.getExecutor("Check Contacts").execute(new Runnable() {
@Override
public void run() {
if (haveContentsChanged()) {
setNeedsToRecreate();
}
}
});
}
});
}
@Override @Override
public synchronized void close() { public synchronized void close() {
if (mObserver != null) { mContactsManager.close();
mContext.getContentResolver().unregisterContentObserver(mObserver);
mObserver = null;
}
super.close(); super.close();
} }
/**
* Typically called whenever the dictionary is created for the first time or
* recreated when we think that there are updates to the dictionary.
* This is called asynchronously.
*/
@Override @Override
public void loadInitialContentsLocked() { public void loadInitialContentsLocked() {
loadDeviceAccountsEmailAddressesLocked(); loadDeviceAccountsEmailAddressesLocked();
@ -128,6 +84,9 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
loadDictionaryForUriLocked(Contacts.CONTENT_URI); loadDictionaryForUriLocked(Contacts.CONTENT_URI);
} }
/**
* Loads device accounts to the dictionary.
*/
private void loadDeviceAccountsEmailAddressesLocked() { private void loadDeviceAccountsEmailAddressesLocked() {
final List<String> accountVocabulary = final List<String> accountVocabulary =
AccountUtils.getDeviceAccountsEmailAddresses(mContext); AccountUtils.getDeviceAccountsEmailAddresses(mContext);
@ -139,80 +98,25 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
Log.d(TAG, "loadAccountVocabulary: " + word); Log.d(TAG, "loadAccountVocabulary: " + word);
} }
runGCIfRequiredLocked(true /* mindsBlockByGC */); runGCIfRequiredLocked(true /* mindsBlockByGC */);
addUnigramLocked(word, FREQUENCY_FOR_CONTACTS, addUnigramLocked(word, ContactsDictionaryConstants.FREQUENCY_FOR_CONTACTS,
false /* isNotAWord */, false /* isPossiblyOffensive */, false /* isNotAWord */, false /* isPossiblyOffensive */,
BinaryDictionary.NOT_A_VALID_TIMESTAMP); BinaryDictionary.NOT_A_VALID_TIMESTAMP);
} }
} }
/**
* Loads data within content providers to the dictionary.
*/
private void loadDictionaryForUriLocked(final Uri uri) { private void loadDictionaryForUriLocked(final Uri uri) {
Cursor cursor = null; final ArrayList<String> validNames = mContactsManager.getValidNames(uri);
try { for (final String name : validNames) {
cursor = mContext.getContentResolver().query(uri, PROJECTION, null, null, null);
if (null == cursor) {
return;
}
if (cursor.moveToFirst()) {
mContactCountAtLastRebuild = getContactCount();
addWordsLocked(cursor);
}
} catch (final SQLiteException e) {
Log.e(TAG, "SQLiteException in the remote Contacts process.", e);
} catch (final IllegalStateException e) {
Log.e(TAG, "Contacts DB is having problems", e);
} finally {
if (null != cursor) {
cursor.close();
}
}
}
private static boolean useFirstLastBigramsForLocale(final Locale locale) {
// TODO: Add firstname/lastname bigram rules for other languages.
if (locale != null && locale.getLanguage().equals(Locale.ENGLISH.getLanguage())) {
return true;
}
return false;
}
private void addWordsLocked(final Cursor cursor) {
int count = 0;
final ArrayList<String> names = new ArrayList<>();
while (!cursor.isAfterLast() && count < MAX_CONTACT_COUNT) {
String name = cursor.getString(INDEX_NAME);
if (isValidName(name)) {
names.add(name);
addNameLocked(name); addNameLocked(name);
++count;
} else {
if (DEBUG_DUMP) {
Log.d(TAG, "Invalid name: " + name);
} }
if (uri.equals(Contacts.CONTENT_URI)) {
// Since we were able to add content successfully, update the local
// state of the manager.
mContactsManager.updateLocalState(validNames);
} }
cursor.moveToNext();
}
mHashCodeAtLastRebuild = names.hashCode();
}
private int getContactCount() {
// TODO: consider switching to a rawQuery("select count(*)...") on the database if
// performance is a bottleneck.
Cursor cursor = null;
try {
cursor = mContext.getContentResolver().query(Contacts.CONTENT_URI, PROJECTION_ID_ONLY,
null, null, null);
if (null == cursor) {
return 0;
}
return cursor.getCount();
} catch (final SQLiteException e) {
Log.e(TAG, "SQLiteException in the remote Contacts process.", e);
} finally {
if (null != cursor) {
cursor.close();
}
}
return 0;
} }
/** /**
@ -225,7 +129,7 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
// TODO: Better tokenization for non-Latin writing systems // TODO: Better tokenization for non-Latin writing systems
for (int i = 0; i < len; i++) { for (int i = 0; i < len; i++) {
if (Character.isLetter(name.codePointAt(i))) { if (Character.isLetter(name.codePointAt(i))) {
int end = getWordEndPosition(name, len, i); int end = ContactsDictionaryUtils.getWordEndPosition(name, len, i);
String word = name.substring(i, end); String word = name.substring(i, end);
if (DEBUG_DUMP) { if (DEBUG_DUMP) {
Log.d(TAG, "addName word = " + word); Log.d(TAG, "addName word = " + word);
@ -239,12 +143,15 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
Log.d(TAG, "addName " + name + ", " + word + ", " + ngramContext); Log.d(TAG, "addName " + name + ", " + word + ", " + ngramContext);
} }
runGCIfRequiredLocked(true /* mindsBlockByGC */); runGCIfRequiredLocked(true /* mindsBlockByGC */);
addUnigramLocked(word, FREQUENCY_FOR_CONTACTS, false /* isNotAWord */, addUnigramLocked(word,
ContactsDictionaryConstants.FREQUENCY_FOR_CONTACTS, false /* isNotAWord */,
false /* isPossiblyOffensive */, false /* isPossiblyOffensive */,
BinaryDictionary.NOT_A_VALID_TIMESTAMP); BinaryDictionary.NOT_A_VALID_TIMESTAMP);
if (!ngramContext.isValid() && mUseFirstLastBigrams) { if (ngramContext.isValid() && mUseFirstLastBigrams) {
runGCIfRequiredLocked(true /* mindsBlockByGC */); runGCIfRequiredLocked(true /* mindsBlockByGC */);
addNgramEntryLocked(ngramContext, word, FREQUENCY_FOR_CONTACTS_BIGRAM, addNgramEntryLocked(ngramContext,
word,
ContactsDictionaryConstants.FREQUENCY_FOR_CONTACTS_BIGRAM,
BinaryDictionary.NOT_A_VALID_TIMESTAMP); BinaryDictionary.NOT_A_VALID_TIMESTAMP);
} }
ngramContext = ngramContext.getNextNgramContext( ngramContext = ngramContext.getNextNgramContext(
@ -254,75 +161,8 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
} }
} }
/** @Override
* Returns the index of the last letter in the word, starting from position startIndex. public void onContactsChange() {
*/ setNeedsToRecreate();
private static int getWordEndPosition(final String string, final int len,
final int startIndex) {
int end;
int cp = 0;
for (end = startIndex + 1; end < len; end += Character.charCount(cp)) {
cp = string.codePointAt(end);
if (!(cp == Constants.CODE_DASH || cp == Constants.CODE_SINGLE_QUOTE
|| Character.isLetter(cp))) {
break;
}
}
return end;
}
boolean haveContentsChanged() {
final long startTime = SystemClock.uptimeMillis();
final int contactCount = getContactCount();
if (contactCount > MAX_CONTACT_COUNT) {
// If there are too many contacts then return false. In this rare case it is impossible
// to include all of them anyways and the cost of rebuilding the dictionary is too high.
// TODO: Sort and check only the MAX_CONTACT_COUNT most recent contacts?
return false;
}
if (contactCount != mContactCountAtLastRebuild) {
if (DEBUG) {
Log.d(TAG, "Contact count changed: " + mContactCountAtLastRebuild + " to "
+ contactCount);
}
return true;
}
// Check all contacts since it's not possible to find out which names have changed.
// This is needed because it's possible to receive extraneous onChange events even when no
// name has changed.
final Cursor cursor = mContext.getContentResolver().query(Contacts.CONTENT_URI, PROJECTION,
null, null, null);
if (null == cursor) {
return false;
}
final ArrayList<String> names = new ArrayList<>();
try {
if (cursor.moveToFirst()) {
while (!cursor.isAfterLast()) {
String name = cursor.getString(INDEX_NAME);
if (isValidName(name)) {
names.add(name);
}
cursor.moveToNext();
}
}
if (names.hashCode() != mHashCodeAtLastRebuild) {
return true;
}
} finally {
cursor.close();
}
if (DEBUG) {
Log.d(TAG, "No contacts changed. (runtime = " + (SystemClock.uptimeMillis() - startTime)
+ " ms)");
}
return false;
}
private static boolean isValidName(final String name) {
if (name != null && -1 == name.indexOf(Constants.CODE_COMMERCIAL_AT)) {
return true;
}
return false;
} }
} }

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@ -0,0 +1,110 @@
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.inputmethod.latin;
import android.content.ContentResolver;
import android.content.Context;
import android.database.ContentObserver;
import android.os.SystemClock;
import android.provider.ContactsContract.Contacts;
import android.util.Log;
import com.android.inputmethod.annotations.UsedForTesting;
import com.android.inputmethod.latin.ContactsManager.ContactsChangedListener;
import com.android.inputmethod.latin.utils.ExecutorUtils;
import java.util.ArrayList;
import java.util.concurrent.ExecutorService;
/**
* A content observer that listens to updates to content provider {@link Contacts.CONTENT_URI}.
*/
// TODO:add test
public class ContactsContentObserver {
private static final String TAG = ContactsContentObserver.class.getSimpleName();
private static final boolean DEBUG = false;
private ContentObserver mObserver;
private final Context mContext;
private final ContactsManager mManager;
public ContactsContentObserver(final ContactsManager manager, final Context context) {
mManager = manager;
mContext = context;
}
public void registerObserver(final ContactsChangedListener listener) {
if (DEBUG) {
Log.d(TAG, "Registered Contacts Content Observer");
}
mObserver = new ContentObserver(null /* handler */) {
@Override
public void onChange(boolean self) {
getBgExecutor().execute(new Runnable() {
@Override
public void run() {
if (haveContentsChanged()) {
if (DEBUG) {
Log.d(TAG, "Contacts have changed; notifying listeners");
}
listener.onContactsChange();
}
}
});
}
};
final ContentResolver contentResolver = mContext.getContentResolver();
contentResolver.registerContentObserver(Contacts.CONTENT_URI, true, mObserver);
}
@UsedForTesting
private ExecutorService getBgExecutor() {
return ExecutorUtils.getExecutor("Check Contacts");
}
private boolean haveContentsChanged() {
final long startTime = SystemClock.uptimeMillis();
final int contactCount = mManager.getContactCount();
if (contactCount > ContactsDictionaryConstants.MAX_CONTACT_COUNT) {
// If there are too many contacts then return false. In this rare case it is impossible
// to include all of them anyways and the cost of rebuilding the dictionary is too high.
// TODO: Sort and check only the MAX_CONTACT_COUNT most recent contacts?
return false;
}
if (contactCount != mManager.getContactCountAtLastRebuild()) {
if (DEBUG) {
Log.d(TAG, "Contact count changed: " + mManager.getContactCountAtLastRebuild()
+ " to " + contactCount);
}
return true;
}
final ArrayList<String> names = mManager.getValidNames(Contacts.CONTENT_URI);
if (names.hashCode() != mManager.getHashCodeAtLastRebuild()) {
return true;
}
if (DEBUG) {
Log.d(TAG, "No contacts changed. (runtime = " + (SystemClock.uptimeMillis() - startTime)
+ " ms)");
}
return false;
}
public void unregister() {
mContext.getContentResolver().unregisterContentObserver(mObserver);
}
}

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@ -0,0 +1,48 @@
/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.inputmethod.latin;
import android.provider.BaseColumns;
import android.provider.ContactsContract.Contacts;
/**
* Constants related to Contacts Content Provider.
*/
public class ContactsDictionaryConstants {
/**
* Projections for {@link Contacts.CONTENT_URI}
*/
public static final String[] PROJECTION = { BaseColumns._ID, Contacts.DISPLAY_NAME };
public static final String[] PROJECTION_ID_ONLY = { BaseColumns._ID };
/**
* Frequency for contacts information into the dictionary
*/
public static final int FREQUENCY_FOR_CONTACTS = 40;
public static final int FREQUENCY_FOR_CONTACTS_BIGRAM = 90;
/**
* The maximum number of contacts that this dictionary supports.
*/
public static final int MAX_CONTACT_COUNT = 10000;
/**
* Index of the column for 'name' in content providers:
* Contacts & ContactsContract.Profile.
*/
public static final int NAME_INDEX = 1;
}

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@ -0,0 +1,55 @@
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.inputmethod.latin;
import com.android.inputmethod.latin.common.Constants;
import java.util.Locale;
/**
* Utility methods related contacts dictionary.
*/
public class ContactsDictionaryUtils {
/**
* Returns the index of the last letter in the word, starting from position startIndex.
*/
public static int getWordEndPosition(final String string, final int len,
final int startIndex) {
int end;
int cp = 0;
for (end = startIndex + 1; end < len; end += Character.charCount(cp)) {
cp = string.codePointAt(end);
if (cp != Constants.CODE_DASH && cp != Constants.CODE_SINGLE_QUOTE
&& !Character.isLetter(cp)) {
break;
}
}
return end;
}
/**
* Returns true if the locale supports using first name and last name as bigrams.
*/
public static boolean useFirstLastBigramsForLocale(final Locale locale) {
// TODO: Add firstname/lastname bigram rules for other languages.
if (locale != null && locale.getLanguage().equals(Locale.ENGLISH.getLanguage())) {
return true;
}
return false;
}
}

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@ -0,0 +1,160 @@
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.inputmethod.latin;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteException;
import android.net.Uri;
import android.provider.ContactsContract.Contacts;
import android.util.Log;
import com.android.inputmethod.latin.common.Constants;
import java.util.ArrayList;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Manages all interactions with Contacts DB.
*
* The manager provides an API for listening to meaning full updates by keeping a
* measure of the current state of the content provider.
*/
// TODO:Add test
public class ContactsManager {
private static final String TAG = ContactsManager.class.getSimpleName();
private static final boolean DEBUG = false;
/**
* Interface to implement for classes interested in getting notified for updates
* to Contacts content provider.
*/
public static interface ContactsChangedListener {
public void onContactsChange();
}
/**
* The number of contacts observed in the most recent instance of
* contacts content provider.
*/
private AtomicInteger mContactCountAtLastRebuild = new AtomicInteger(0);
/**
* The hash code of list of valid contacts names in the most recent dictionary
* rebuild.
*/
private AtomicInteger mHashCodeAtLastRebuild = new AtomicInteger(0);
private final Context mContext;
private final ContactsContentObserver mObserver;
public ContactsManager(final Context context) {
mContext = context;
mObserver = new ContactsContentObserver(this /* ContactsManager */, context);
}
// TODO: This was synchronized in previous version. Why?
public void registerForUpdates(final ContactsChangedListener listener) {
mObserver.registerObserver(listener);
}
public int getContactCountAtLastRebuild() {
return mContactCountAtLastRebuild.get();
}
public int getHashCodeAtLastRebuild() {
return mHashCodeAtLastRebuild.get();
}
/**
* Returns all the valid names in the Contacts DB. Callers should also
* call {@link #updateLocalState(ArrayList)} after they are done with result
* so that the manager can cache local state for determining updates.
*/
public ArrayList<String> getValidNames(final Uri uri) {
final ArrayList<String> names = new ArrayList<>();
// Check all contacts since it's not possible to find out which names have changed.
// This is needed because it's possible to receive extraneous onChange events even when no
// name has changed.
final Cursor cursor = mContext.getContentResolver().query(uri,
ContactsDictionaryConstants.PROJECTION, null, null, null);
if (cursor != null) {
try {
if (cursor.moveToFirst()) {
while (!cursor.isAfterLast()) {
final String name = cursor.getString(
ContactsDictionaryConstants.NAME_INDEX);
if (isValidName(name)) {
names.add(name);
}
cursor.moveToNext();
}
}
} finally {
cursor.close();
}
}
return names;
}
/**
* Returns the number of contacts in contacts content provider.
*/
public int getContactCount() {
// TODO: consider switching to a rawQuery("select count(*)...") on the database if
// performance is a bottleneck.
Cursor cursor = null;
try {
cursor = mContext.getContentResolver().query(Contacts.CONTENT_URI,
ContactsDictionaryConstants.PROJECTION_ID_ONLY, null, null, null);
if (null == cursor) {
return 0;
}
return cursor.getCount();
} catch (final SQLiteException e) {
Log.e(TAG, "SQLiteException in the remote Contacts process.", e);
} finally {
if (null != cursor) {
cursor.close();
}
}
return 0;
}
private static boolean isValidName(final String name) {
if (name != null && -1 == name.indexOf(Constants.CODE_COMMERCIAL_AT)) {
return true;
}
return false;
}
/**
* Updates the local state of the manager. This should be called when the callers
* are done with all the updates of the content provider successfully.
*/
public void updateLocalState(final ArrayList<String> names) {
mContactCountAtLastRebuild.set(getContactCount());
mHashCodeAtLastRebuild.set(names.hashCode());
}
/**
* Performs any necessary cleanup.
*/
public void close() {
mObserver.unregister();
}
}

View File

@ -177,4 +177,6 @@ public interface DictionaryFacilitator {
NgramContext ngramContext, NgramContext ngramContext,
int increment, int increment,
int timeStampInSeconds); int timeStampInSeconds);
void clearLanguageModel(String filePath);
} }

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@ -804,4 +804,9 @@ public class DictionaryFacilitatorImpl implements DictionaryFacilitator {
int timeStampInSeconds) { int timeStampInSeconds) {
// Do nothing. // Do nothing.
} }
@Override
public void clearLanguageModel(String filePath) {
// Do nothing.
}
} }

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@ -21,13 +21,14 @@ import com.android.inputmethod.annotations.UsedForTesting;
import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorService; import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors; import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadFactory; import java.util.concurrent.ThreadFactory;
/** /**
* Utilities to manage executors. * Utilities to manage executors.
*/ */
public class ExecutorUtils { public class ExecutorUtils {
static final ConcurrentHashMap<String, ExecutorService> sExecutorMap = static final ConcurrentHashMap<String, ScheduledExecutorService> sExecutorMap =
new ConcurrentHashMap<>(); new ConcurrentHashMap<>();
private static class ThreadFactoryWithId implements ThreadFactory { private static class ThreadFactoryWithId implements ThreadFactory {
@ -46,13 +47,14 @@ public class ExecutorUtils {
/** /**
* Gets the executor for the given id. * Gets the executor for the given id.
*/ */
public static ExecutorService getExecutor(final String id) { public static ScheduledExecutorService getExecutor(final String id) {
ExecutorService executor = sExecutorMap.get(id); ScheduledExecutorService executor = sExecutorMap.get(id);
if (executor == null) { if (executor == null) {
synchronized (sExecutorMap) { synchronized (sExecutorMap) {
executor = sExecutorMap.get(id); executor = sExecutorMap.get(id);
if (executor == null) { if (executor == null) {
executor = Executors.newSingleThreadExecutor(new ThreadFactoryWithId(id)); executor = Executors.newSingleThreadScheduledExecutor(
new ThreadFactoryWithId(id));
sExecutorMap.put(id, executor); sExecutorMap.put(id, executor);
} }
} }
@ -66,7 +68,7 @@ public class ExecutorUtils {
@UsedForTesting @UsedForTesting
public static void shutdownAllExecutors() { public static void shutdownAllExecutors() {
synchronized (sExecutorMap) { synchronized (sExecutorMap) {
for (final ExecutorService executor : sExecutorMap.values()) { for (final ScheduledExecutorService executor : sExecutorMap.values()) {
executor.execute(new Runnable() { executor.execute(new Runnable() {
@Override @Override
public void run() { public void run() {