public async Task <Match> ReadUntilMatchAsync(string pattern, CancellationToken cancelToken)
{
Match match;
string header;
int ret;
do
{
header = m_xmlStream.processNextXMLTag();
while (header == "") //there's nothing in the buffer or incomplete tags
{
ret = await ReadFromStreamAsync(cancelToken);
header = m_xmlStream.processNextXMLTag();
}
match = Regex.Match(header, pattern);
if (!match.Success)
{
LogMessage("WARNING: Unexpected XML tag in ReadUntilMatchAsync(): " + header);
LogMessage("Buffer contents: " + Encoding.Default.GetString(m_xmlStream.getBuffer()));
}
}while (!match.Success);
return(match);
}
public void CheckCancellationRequests()
{
try
{
if (!m_netStream.DataAvailable)
{
return;
}
XMLStream inputXMLStream = new XMLStream();
var bytes = m_netStream.Read(inputXMLStream.getBuffer(), inputXMLStream.getBufferOffset(),
inputXMLStream.getBufferSize() - inputXMLStream.getBufferOffset());
inputXMLStream.addBytesRead(bytes);
//we let the xmlstream object know that some bytes have been read in its buffer
string xmlItem = inputXMLStream.peekNextXMLItem();
if (xmlItem != "")
{
string xmlItemContent = inputXMLStream.getLastXMLItemContent();
if (xmlItemContent == JobTransmitter.m_quitMessage)
{
inputXMLStream.addProcessedBytes(bytes);
inputXMLStream.discardProcessedData();
LogMessage("Stopping job execution");
m_cancelTokenSource.Cancel();
}
}
}
catch (IOException)
{
LogMessage("IOException in CheckCancellationRequests()");
}
catch (OperationCanceledException)
{
LogMessage("Thread finished gracefully");
}
catch (ObjectDisposedException)
{
LogMessage("Network stream closed: async read finished");
}
catch (InvalidOperationException ex)
{
LogMessage("InvalidOperationException in CheckCancellationRequests");
LogMessage(ex.ToString());
}
catch (Exception ex)
{
LogMessage("Unhandled exception in CheckCancellationRequests");
LogMessage(ex.ToString());
}
}
