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/*
* Copyright (C) 2012 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.research;
import android.app.AlarmManager;
import android.app.IntentService;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.SystemClock;
import com.android.inputmethod.latin.define.ProductionFlag;
/**
* Service to invoke the uploader.
*
* Can be regularly invoked, invoked on boot, etc.
*/
public final class UploaderService extends IntentService {
private static final String TAG = UploaderService.class.getSimpleName();
private static final boolean DEBUG = false
&& ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
public static final long RUN_INTERVAL = AlarmManager.INTERVAL_HOUR;
public static final String EXTRA_UPLOAD_UNCONDITIONALLY = UploaderService.class.getName()
+ ".extra.UPLOAD_UNCONDITIONALLY";
protected static final int TIMEOUT_IN_MS = 1000 * 4;
public UploaderService() {
super("Research Uploader Service");
}
@Override
protected void onHandleIntent(final Intent intent) {
// We may reach this point either because the alarm fired, or because the system explicitly
// requested that an Upload occur. In the latter case, we want to cancel the alarm in case
// it's about to fire.
cancelAndRescheduleUploadingService(this, false /* needsRescheduling */);
final Uploader uploader = new Uploader(this);
if (!uploader.isPossibleToUpload()) return;
if (isUploadingUnconditionally(intent.getExtras()) || uploader.isConvenientToUpload()) {
uploader.doUpload();
}
cancelAndRescheduleUploadingService(this, true /* needsRescheduling */);
}
private boolean isUploadingUnconditionally(final Bundle bundle) {
if (bundle == null) return false;
if (bundle.containsKey(EXTRA_UPLOAD_UNCONDITIONALLY)) {
return bundle.getBoolean(EXTRA_UPLOAD_UNCONDITIONALLY);
}
return false;
}
/**
* Arrange for the UploaderService to be run on a regular basis.
*
* Any existing scheduled invocation of UploaderService is removed and optionally rescheduled.
* This may cause problems if this method is called so often that no scheduled invocation is
* ever run. But if the delay is short enough that it will go off when the user is sleeping,
* then there should be no starvation.
*
* @param context {@link Context} object
* @param needsRescheduling whether to schedule a future intent to be delivered to this service
*/
public static void cancelAndRescheduleUploadingService(final Context context,
final boolean needsRescheduling) {
final Intent intent = new Intent(context, UploaderService.class);
final PendingIntent pendingIntent = PendingIntent.getService(context, 0, intent, 0);
final AlarmManager alarmManager = (AlarmManager) context.getSystemService(
Context.ALARM_SERVICE);
alarmManager.cancel(pendingIntent);
if (needsRescheduling) {
alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime()
+ UploaderService.RUN_INTERVAL, pendingIntent);
}
}
}
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