89 lines
3.6 KiB
Java
89 lines
3.6 KiB
Java
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.research;
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import android.app.AlarmManager;
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import android.app.IntentService;
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import android.app.PendingIntent;
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import android.content.Context;
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import android.content.Intent;
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import android.os.Bundle;
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import android.os.SystemClock;
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/**
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* Service to invoke the uploader.
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*
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* Can be regularly invoked, invoked on boot, etc.
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*/
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public final class UploaderService extends IntentService {
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private static final String TAG = UploaderService.class.getSimpleName();
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public static final long RUN_INTERVAL = AlarmManager.INTERVAL_HOUR;
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public static final String EXTRA_UPLOAD_UNCONDITIONALLY = UploaderService.class.getName()
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+ ".extra.UPLOAD_UNCONDITIONALLY";
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public UploaderService() {
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super("Research Uploader Service");
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}
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@Override
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protected void onHandleIntent(final Intent intent) {
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// We may reach this point either because the alarm fired, or because the system explicitly
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// requested that an Upload occur. In the latter case, we want to cancel the alarm in case
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// it's about to fire.
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cancelAndRescheduleUploadingService(this, false /* needsRescheduling */);
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final Uploader uploader = new Uploader(this);
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if (!uploader.isPossibleToUpload()) return;
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if (isUploadingUnconditionally(intent.getExtras()) || uploader.isConvenientToUpload()) {
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uploader.doUpload();
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}
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cancelAndRescheduleUploadingService(this, true /* needsRescheduling */);
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}
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private boolean isUploadingUnconditionally(final Bundle bundle) {
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if (bundle == null) return false;
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if (bundle.containsKey(EXTRA_UPLOAD_UNCONDITIONALLY)) {
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return bundle.getBoolean(EXTRA_UPLOAD_UNCONDITIONALLY);
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}
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return false;
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}
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/**
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* Arrange for the UploaderService to be run on a regular basis.
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*
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* Any existing scheduled invocation of UploaderService is removed and optionally rescheduled.
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* This may cause problems if this method is called so often that no scheduled invocation is
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* ever run. But if the delay is short enough that it will go off when the user is sleeping,
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* then there should be no starvation.
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*
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* @param context {@link Context} object
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* @param needsRescheduling whether to schedule a future intent to be delivered to this service
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*/
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public static void cancelAndRescheduleUploadingService(final Context context,
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final boolean needsRescheduling) {
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final Intent intent = new Intent(context, UploaderService.class);
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final PendingIntent pendingIntent = PendingIntent.getService(context, 0, intent, 0);
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final AlarmManager alarmManager = (AlarmManager) context.getSystemService(
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Context.ALARM_SERVICE);
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alarmManager.cancel(pendingIntent);
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if (needsRescheduling) {
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alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime()
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+ UploaderService.RUN_INTERVAL, pendingIntent);
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}
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}
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}
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