private static IObservable <Unit> InternalCopyAsObservable(Stream inputStream, int readSize, Stream outputStream, int writeSize)
{
// ------------- prepare input
IObservable <byte[]> inputSource = new ReadStreamObservable(inputStream, readSize);
// ------------- prepare output
Func <byte[], int, int, IObservable <Unit> > funcAsyncWrite = Observable.FromAsyncPattern <byte[], int, int>(
outputStream.BeginWrite, outputStream.EndWrite);
// ------------- chain together
return(from bytes in inputSource.MinimumBuffer(writeSize)
from writeResult in funcAsyncWrite(bytes, 0, bytes.Length)
select writeResult);
}
private static void CheckFromApm()
{
Stream stream = MakeReadableStream(Enumerable.Range(8, 10));
IObservable <byte[]> source = new ReadStreamObservable(stream, 4);
using (source.Subscribe(bytes =>
{
Debug.Assert(bytes.Length == 4, "impossible for partial reading");
int parsed = BitConverter.ToInt32(bytes, 0);
Thread.Sleep(TimeSpan.FromSeconds(0.5)); // simulate long-time processing
Console.WriteLine("{0} is read out.", parsed);
}, () => Console.WriteLine("!!! reading completed !!!")))
{
Helper.Pause();
}
}