| /* |
| * Copyright (C) 2013 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.personalization; |
| |
| import android.app.AlarmManager; |
| import android.app.PendingIntent; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Broadcast receiver for periodically updating decaying dictionaries. |
| */ |
| public class DictionaryDecayBroadcastReciever extends BroadcastReceiver { |
| /** |
| * The root domain for the personalization. |
| */ |
| private static final String PERSONALIZATION_DOMAIN = |
| "com.android.inputmethod.latin.personalization"; |
| |
| /** |
| * The action of the intent to tell the time to decay dictionaries. |
| */ |
| private static final String DICTIONARY_DECAY_INTENT_ACTION = |
| PERSONALIZATION_DOMAIN + ".DICT_DECAY"; |
| |
| /** |
| * Interval to update for decaying dictionaries. |
| */ |
| static final long DICTIONARY_DECAY_INTERVAL_IN_MILLIS = TimeUnit.MINUTES.toMillis(60); |
| |
| private static PendingIntent getPendingIntentForDictionaryDecay(final Context context) { |
| final Intent updateIntent = new Intent(DICTIONARY_DECAY_INTENT_ACTION); |
| updateIntent.setClass(context, DictionaryDecayBroadcastReciever.class); |
| return PendingIntent.getBroadcast(context, 0 /* requestCode */, |
| updateIntent, PendingIntent.FLAG_CANCEL_CURRENT); |
| } |
| |
| /** |
| * Set up interval alarm for dynamic dictionaries. |
| */ |
| public static void setUpIntervalAlarmForDictionaryDecaying(final Context context) { |
| final AlarmManager alarmManager = |
| (AlarmManager)context.getSystemService(Context.ALARM_SERVICE); |
| if (null == alarmManager) { |
| return; |
| } |
| final long alarmTriggerTimeInMillis = |
| System.currentTimeMillis() + DICTIONARY_DECAY_INTERVAL_IN_MILLIS; |
| alarmManager.setInexactRepeating(AlarmManager.RTC, alarmTriggerTimeInMillis, |
| DICTIONARY_DECAY_INTERVAL_IN_MILLIS, getPendingIntentForDictionaryDecay(context)); |
| } |
| |
| /** |
| * Cancel interval alarm that has been set up. |
| */ |
| public static void cancelIntervalAlarmForDictionaryDecaying(final Context context) { |
| final AlarmManager alarmManager = |
| (AlarmManager)context.getSystemService(Context.ALARM_SERVICE); |
| if (null == alarmManager) { |
| return; |
| } |
| alarmManager.cancel(getPendingIntentForDictionaryDecay(context)); |
| } |
| |
| @Override |
| public void onReceive(final Context context, final Intent intent) { |
| final String action = intent.getAction(); |
| if (action.equals(DICTIONARY_DECAY_INTENT_ACTION)) { |
| PersonalizationHelper.runGCOnAllOpenedUserHistoryDictionaries(); |
| } |
| } |
| } |