/**
* Create a new instance.
*
* @param builder the builder from which to get values
*/
private DownloadTask(final Builder builder) {
downloadId = builder.id;
uri = builder.downloadUri;
destination = builder.dest;
listener = new WeakReference<>(builder.listener);
provider = new WeakReference<>(builder.provider);
downloadTag = builder.eTag;
downloadOffset = 0L;
totalBytes = 0L;
try {
if (null != builder.offset) {
downloadOffset = Long.parseLong(builder.offset);
}
} catch (final NumberFormatException ex) {
Log.e(LOG_TAG, "Error trying to figure out offset to start download", ex);
}
try {
if (null != builder.totalBytes) {
totalBytes = Long.parseLong(builder.totalBytes);
}
} catch (final NumberFormatException ex) {
Log.e(LOG_TAG, "Error trying to figure out totalBytes to start download", ex);
}
forUser = DownloadFlags.isUserRequestFlagSet(builder.downloadFlags);
isSilent = DownloadFlags.isSilentFlagSet(builder.downloadFlags);
isMobileNetworkProhibited = DownloadFlags.isCellNetworkProhibited(builder.downloadFlags);
networkStatusProvider = builder.networkStatusProvider;
autoRestart = builder.autoRestart;
downloadErrorCode = DownloadError.NO_ERROR.getValue();
cancelReason = TaskCancelReason.UNEXPECTED;
}
/**
* Execute the task.
*
* @return true if it works, false otherwise.
*/
@Override
public Boolean call() {
final long start = System.nanoTime();
CompletionStatus result = CompletionStatus.FAILED;
try {
Log.d(LOG_TAG, "Download Task started for download id = " + downloadId);
failureMessage = MSG_OKAY;
downloadErrorCode = DownloadError.NO_ERROR.getValue();
if (!ensureFolderExists(destination)) {
finish(
CompletionStatus.FAILED,
failureMessage,
cumulativeBytesRead,
totalBytes,
autoRestart,
downloadErrorCode);
return false;
}
if (null != downloadTag && 0L < downloadOffset) {
if (!ensurePartialFilePresent(destination, downloadOffset)) {
// if we don't have the partial file any more, we have to start again
downloadOffset = 0L;
}
}
result = readFromUri(destination);
finish(
result, failureMessage, cumulativeBytesRead, totalBytes, autoRestart, downloadErrorCode);
return CompletionStatus.SUCCEEDED == result;
} finally {
// Make sure we release wifi lock (if any)
networkStatusProvider.releaseWifiLock(downloadId);
final long duration = System.nanoTime() - start;
Log.d(
LOG_TAG,
String.format(
"Download result(%s) for download task with uri(%s) took %.3f seconds.",
result.name(), uri, (double) duration / 1000000000));
}
}
