/**
* Waits for completed requests. Once the first request has been taken, the method will wait
* WAIT_TIMEOUT ms longer to collect more completed requests.
*
* @return Collected feeds or null if the method has been interrupted during the first waiting
* period.
*/
private List<Feed> collectCompletedRequests() {
List<Feed> results = new LinkedList<Feed>();
DownloadRequester requester = DownloadRequester.getInstance();
int tasks = 0;
try {
DownloadRequest request = completedRequests.take();
parserService.submit(new FeedParserTask(request));
tasks++;
} catch (InterruptedException e) {
return null;
}
tasks += pollCompletedDownloads();
isCollectingRequests = true;
if (requester.isDownloadingFeeds()) {
// wait for completion of more downloads
long startTime = System.currentTimeMillis();
long currentTime = startTime;
while (requester.isDownloadingFeeds() && (currentTime - startTime) < WAIT_TIMEOUT) {
try {
if (BuildConfig.DEBUG)
Log.d(TAG, "Waiting for " + (startTime + WAIT_TIMEOUT - currentTime) + " ms");
sleep(startTime + WAIT_TIMEOUT - currentTime);
} catch (InterruptedException e) {
if (BuildConfig.DEBUG) Log.d(TAG, "interrupted while waiting for more downloads");
tasks += pollCompletedDownloads();
} finally {
currentTime = System.currentTimeMillis();
}
}
tasks += pollCompletedDownloads();
}
isCollectingRequests = false;
for (int i = 0; i < tasks; i++) {
try {
Feed f = parserService.take().get();
if (f != null) {
results.add(f);
}
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
}
return results;
}
@Override
public void run() {
if (BuildConfig.DEBUG) Log.d(TAG, "downloadCompletionThread was started");
while (!isInterrupted()) {
try {
Downloader downloader = downloadExecutor.take().get();
if (BuildConfig.DEBUG) Log.d(TAG, "Received 'Download Complete' - message.");
removeDownload(downloader);
DownloadStatus status = downloader.getResult();
boolean successful = status.isSuccessful();
final int type = status.getFeedfileType();
if (successful) {
if (type == Feed.FEEDFILETYPE_FEED) {
handleCompletedFeedDownload(downloader.getDownloadRequest());
} else if (type == FeedImage.FEEDFILETYPE_FEEDIMAGE) {
handleCompletedImageDownload(status, downloader.getDownloadRequest());
} else if (type == FeedMedia.FEEDFILETYPE_FEEDMEDIA) {
handleCompletedFeedMediaDownload(status, downloader.getDownloadRequest());
}
} else {
numberOfDownloads.decrementAndGet();
if (!status.isCancelled()) {
if (status.getReason() == DownloadError.ERROR_UNAUTHORIZED) {
postAuthenticationNotification(downloader.getDownloadRequest());
} else if (status.getReason() == DownloadError.ERROR_HTTP_DATA_ERROR
&& Integer.valueOf(status.getReasonDetailed())
== HttpStatus.SC_REQUESTED_RANGE_NOT_SATISFIABLE) {
Log.d(TAG, "Requested invalid range, restarting download from the beginning");
FileUtils.deleteQuietly(
new File(downloader.getDownloadRequest().getDestination()));
DownloadRequester.getInstance()
.download(DownloadService.this, downloader.getDownloadRequest());
} else {
Log.e(TAG, "Download failed");
saveDownloadStatus(status);
handleFailedDownload(status, downloader.getDownloadRequest());
}
}
sendDownloadHandledIntent();
queryDownloadsAsync();
}
} catch (InterruptedException e) {
if (BuildConfig.DEBUG) Log.d(TAG, "DownloadCompletionThread was interrupted");
} catch (ExecutionException e) {
e.printStackTrace();
numberOfDownloads.decrementAndGet();
}
}
if (BuildConfig.DEBUG) Log.d(TAG, "End of downloadCompletionThread");
}
/** Check if there's something else to download, otherwise stop */
void queryDownloads() {
if (AppConfig.DEBUG) {
Log.d(TAG, numberOfDownloads.get() + " downloads left");
}
if (numberOfDownloads.get() <= 0 && DownloadRequester.getInstance().hasNoDownloads()) {
if (AppConfig.DEBUG)
Log.d(TAG, "Number of downloads is " + numberOfDownloads.get() + ", attempting shutdown");
stopSelf();
} else {
setupNotificationUpdater();
startForeground(NOTIFICATION_ID, updateNotifications());
}
}
@SuppressLint("NewApi")
@Override
public void onCreate() {
if (AppConfig.DEBUG) Log.d(TAG, "Service started");
isRunning = true;
handler = new Handler();
completedDownloads = Collections.synchronizedList(new ArrayList<DownloadStatus>());
downloads = new ArrayList<Downloader>();
numberOfDownloads = new AtomicInteger(0);
IntentFilter cancelDownloadReceiverFilter = new IntentFilter();
cancelDownloadReceiverFilter.addAction(ACTION_CANCEL_ALL_DOWNLOADS);
cancelDownloadReceiverFilter.addAction(ACTION_CANCEL_DOWNLOAD);
registerReceiver(cancelDownloadReceiver, cancelDownloadReceiverFilter);
syncExecutor =
Executors.newSingleThreadExecutor(
new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(r);
t.setPriority(Thread.MIN_PRIORITY);
return t;
}
});
downloadExecutor =
new ExecutorCompletionService<Downloader>(
Executors.newFixedThreadPool(
NUM_PARALLEL_DOWNLOADS,
new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(r);
t.setPriority(Thread.MIN_PRIORITY);
return t;
}
}));
schedExecutor =
new ScheduledThreadPoolExecutor(
SCHED_EX_POOL_SIZE,
new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(r);
t.setPriority(Thread.MIN_PRIORITY);
return t;
}
},
new RejectedExecutionHandler() {
@Override
public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {
Log.w(TAG, "SchedEx rejected submission of new task");
}
});
downloadCompletionThread.start();
setupNotificationBuilders();
requester = DownloadRequester.getInstance();
}