/// <summary>
/// Send a JSON message to the command. First 2 bytes is size of message.
/// </summary>
/// <remarks>
/// This is used by both asynchronous and no result commands.
/// </remarks>
/// <param name="json">The JSON string to send.</param>
internal void SendJsonCommand(IJson json)
{
#if DEBUG
if (Log.IsDebugEnabled)
{
Log.Debug("Send: " + json.ToJson());
}
#endif
Stream output = _process.StandardInput.BaseStream;
byte[] msg = JsonMsgUtil.WrapJsonOutput(json);
output.Write(msg, 0, msg.Length);
output.Flush();
}
/// <summary>
/// Send a JSON message to the command. First 2 bytes is size of message.
/// </summary>
/// <param name="json">The JSON string to send.</param>
internal void SendJsonForAsynchronousResults(IJson json)
{
#if DEBUG
if (Log.IsDebugEnabled)
{
Log.Debug("Send: " + json);
}
#endif
_runningAsynchronously = true;
Stream output = _process.StandardInput.BaseStream;
byte[] msg = JsonMsgUtil.WrapJsonOutput(json);
output.Write(msg, 0, msg.Length);
output.Flush();
}
void ReadStandardOutput()
{
#if DEBUG
if (Log.IsDebugEnabled)
{
Log.Debug("Started reading from standard output.");
}
#endif
try
{
// Read JSON messages.
int retries = 0;
const int maxRetries = 12; // 1/4 sec * 4 * 3 = 3 seconds.
while (_running)
{
Stream input = _process.StandardOutput.BaseStream;
string response = JsonMsgUtil.ExtractJsonInput(input);
if (response == null)
{
if (retries++ > maxRetries)
{
#if DEBUG
if (Log.IsErrorEnabled)
{
Log.Error("Null received from input stream. Maximum number of retries reached.");
}
#endif
_running = false;
Close();
}
#if DEBUG
if (Log.IsWarnEnabled)
{
Log.Warn("Null received from input stream. Waiting 250ms.");
}
#endif
Thread.Sleep(250);
}
else
{
retries = 0; // reset
_msgQueue.Enqueue(response);
}
_completed.Set();
}
}
catch (ThreadAbortException)
{
#if DEBUG
if (Log.IsWarnEnabled)
{
Log.Warn("StandardOutput: Thread aborted.");
}
#endif
}
#if DEBUG
if (Log.IsDebugEnabled)
{
Log.Debug("Finished reading from standard output.");
}
#endif
}
