protected override Task<Stream> CreateContentReadStreamAsync()
{
// WriteMessageAsync might run synchronously and try to write to the stream. ProducerConsumerStream
// will block on the write until the stream is being read from. The WriteMessageAsync method needs
// to run on a different thread to prevent a deadlock.
_stream = new ProducerConsumerStream();
_encodingTask = Task.Run(async () => await _messageEncoder.WriteMessageAsync(_message, _stream));
return Task.FromResult(_stream);
}
protected override Task<Stream> CreateContentReadStreamAsync()
{
// WriteMessageAsync might run synchronously and try to write to the stream. ProducerConsumerStream
// will block on the write until the stream is being read from. The WriteMessageAsync method needs
// to run on a different thread to prevent a deadlock.
var resultStream = new ProducerConsumerStream();
_stream = new BufferedWriteStream(resultStream, WriteBufferSize);
Task.Factory.StartNew(async (content) =>
{
var thisPtr = content as StreamedMessageContent;
try
{
await _messageEncoder.WriteMessageAsync(thisPtr._message, thisPtr._stream);
}
finally
{
thisPtr._stream.Dispose();
thisPtr._writeCompletedTcs.TrySetResult(true);
}
}, this, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
return Task.FromResult<Stream>(resultStream);
}
public Stream OpenFile(FileSystemPath path, FileAccess access)
{
if (access == FileAccess.Write)
throw new NotSupportedException();
Stream s = new ProducerConsumerStream();
ThreadPool.QueueUserWorkItem(delegate
{
_extractor.ExtractFile(GetSevenZipPath(path), s);
s.Close();
});
return s;
}
