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/*
* 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();
PersonalizationHelper.runGCOnAllOpenedPersonalizationDictionaries();
}
}
}
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