private void DoData()
{
var dataRedirector = this.ResolveDataRedirector(_lastMetadata);
dataRedirector?.Redirect();
_state = StreamRedirectorState.Idle;
}
private void Routine()
{
_state = StreamRedirectorState.Idle;
try
{
var goOn = true;
while (goOn)
{
switch (_state)
{
case StreamRedirectorState.Idle:
this.DoIdle();
break;
case StreamRedirectorState.Metadata:
this.DoMetadata();
break;
case StreamRedirectorState.Data:
this.DoData();
break;
case StreamRedirectorState.Stop:
goOn = false;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
Logger.Info("Stopped due to request");
}
catch (Exception ex)
{
// todo1[ak] log or something
Logger.InfoFormat("{0} Stopped due to an exception {1}", this.GetType().FullName, ex.GetType().FullName);
this.Relay.StopSignal.Set();
}
ThreadPool.QueueUserWorkItem(x => this.Relay.Dispose());
}
private void DoMetadata()
{
if (this.SourceStream.AccumulatedBytesCount == 0)
{
// let's accumulate some data
var bytesReadCount = this.SourceStream.ReadInnerStream(PORTION_SIZE);
if (bytesReadCount == 0)
{
_state = StreamRedirectorState.Idle;
return;
}
}
var metadataLength = this.GetMetadataLength();
if (metadataLength >= 0)
{
this.SourceBuffer.Allocate(metadataLength);
this.SourceStream.Read(this.SourceBuffer.Raw, 0, metadataLength);
var metadata = this.ParseMetadata(this.SourceBuffer.Raw, 0);
this.CheckMetadata(metadata);
var transformedMetadata = this.TransformMetadata(metadata);
var transformedMetadataBytes = transformedMetadata.Serialize();
//Logger.Info(transformedMetadataBytes.ToAsciiString());
this.DestinationStream.Write(transformedMetadataBytes, 0, transformedMetadataBytes.Length);
_lastMetadata = transformedMetadata;
_state = StreamRedirectorState.Data;
}
else
{
// seems like not enough bytes to extract metadata, read more
this.SourceStream.ReadInnerStream(PORTION_SIZE);
}
}
private void DoIdle()
{
if (this.SourceStream.AccumulatedBytesCount > 0)
{
_state = StreamRedirectorState.Metadata;
return;
}
var bytesReadCount = this.SourceStream.ReadInnerStream(PORTION_SIZE);
if (bytesReadCount == 0)
{
var gotSignal = this.Relay.StopSignal.WaitOne(_idleTimeout);
if (gotSignal)
{
_state = StreamRedirectorState.Stop;
}
}
else
{
_state = StreamRedirectorState.Metadata;
}
}
