| /* |
| * Copyright (C) 2016 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.providers.downloads; |
| |
| import static android.provider.Downloads.Impl.ALL_DOWNLOADS_CONTENT_URI; |
| |
| import static com.android.providers.downloads.Constants.TAG; |
| |
| import android.app.job.JobParameters; |
| import android.app.job.JobService; |
| import android.database.ContentObserver; |
| import android.util.Log; |
| import android.util.SparseArray; |
| |
| /** |
| * Service that hosts download jobs. Each active download job is handled as a |
| * unique {@link DownloadThread} instance. |
| * <p> |
| * The majority of downloads should have ETag values to enable resuming, so if a |
| * given download isn't able to finish in the normal job timeout (10 minutes), |
| * we just reschedule the job and resume again in the future. |
| */ |
| public class DownloadJobService extends JobService { |
| // @GuardedBy("mActiveThreads") |
| private SparseArray<DownloadThread> mActiveThreads = new SparseArray<>(); |
| |
| @Override |
| public void onCreate() { |
| super.onCreate(); |
| |
| // While someone is bound to us, watch for database changes that should |
| // trigger notification updates. |
| getContentResolver().registerContentObserver(ALL_DOWNLOADS_CONTENT_URI, true, mObserver); |
| } |
| |
| @Override |
| public void onDestroy() { |
| super.onDestroy(); |
| getContentResolver().unregisterContentObserver(mObserver); |
| } |
| |
| @Override |
| public boolean onStartJob(JobParameters params) { |
| final int id = params.getJobId(); |
| |
| // Spin up thread to handle this download |
| final DownloadInfo info = DownloadInfo.queryDownloadInfo(this, id); |
| if (info == null) { |
| Log.w(TAG, "Odd, no details found for download " + id); |
| return false; |
| } |
| |
| final DownloadThread thread; |
| synchronized (mActiveThreads) { |
| thread = new DownloadThread(this, params, info); |
| mActiveThreads.put(id, thread); |
| } |
| thread.start(); |
| |
| return true; |
| } |
| |
| @Override |
| public boolean onStopJob(JobParameters params) { |
| final int id = params.getJobId(); |
| |
| final DownloadThread thread; |
| synchronized (mActiveThreads) { |
| thread = mActiveThreads.removeReturnOld(id); |
| } |
| if (thread != null) { |
| // If the thread is still running, ask it to gracefully shutdown, |
| // and reschedule ourselves to resume in the future. |
| thread.requestShutdown(); |
| |
| Helpers.scheduleJob(this, DownloadInfo.queryDownloadInfo(this, id)); |
| } |
| return false; |
| } |
| |
| public void jobFinishedInternal(JobParameters params, boolean needsReschedule) { |
| synchronized (mActiveThreads) { |
| mActiveThreads.remove(params.getJobId()); |
| } |
| |
| // Update notifications one last time while job is protecting us |
| mObserver.onChange(false); |
| |
| jobFinished(params, needsReschedule); |
| } |
| |
| private ContentObserver mObserver = new ContentObserver(Helpers.getAsyncHandler()) { |
| @Override |
| public void onChange(boolean selfChange) { |
| Helpers.getDownloadNotifier(DownloadJobService.this).update(); |
| } |
| }; |
| } |