private void SendQuery()
{
foreach (var queryInfo in _pendingQueries.GetConsumingEnumerable())
{
byte streamId = AcquireNextStreamId();
if (_isClosed == 1)
{
// abort queries.
var ex = new OperationCanceledException();
queryInfo.NotifyError(ex);
_instrumentation.ClientTrace(queryInfo.Token, EventType.Cancellation);
throw ex;
}
try
{
InstrumentationToken token = queryInfo.Token;
bool tracing = 0 != (token.ExecutionFlags & ExecutionFlags.ServerTracing);
using (var bufferingFrameWriter = new BufferingFrameWriter(tracing))
{
queryInfo.Write(bufferingFrameWriter);
_logger.Debug("Starting writing frame for stream {0}@{1}", streamId, Endpoint);
_instrumentation.ClientTrace(token, EventType.BeginWrite);
_queryInfos[streamId] = queryInfo;
bufferingFrameWriter.SendFrame(streamId, _socket);
_logger.Debug("Done writing frame for stream {0}@{1}", streamId, Endpoint);
_instrumentation.ClientTrace(token, EventType.EndWrite);
}
}
catch (Exception ex)
{
queryInfo.NotifyError(ex);
if (IsStreamInBadState(ex))
{
throw;
}
}
}
}
private void WriteNextFrame(Action<IFrameWriter> writer, byte streamId)
{
try
{
InstrumentationToken token = _queryInfos[streamId].InstrumentationToken;
_instrumentation.ClientTrace(token, EventType.BeginWrite);
// acquire the global lock to write the request
_logger.Debug("Starting writing frame for stream {0}@{1}", streamId, Endpoint);
bool tracing = 0 != (token.ExecutionFlags & ExecutionFlags.ServerTracing);
using (BufferingFrameWriter bufferingFrameWriter = new BufferingFrameWriter(streamId, tracing))
{
writer(bufferingFrameWriter);
lock (_globalLock)
{
bufferingFrameWriter.SendFrame(_socket);
}
}
_logger.Debug("Done writing frame for stream {0}@{1}", streamId, Endpoint);
_instrumentation.ClientTrace(token, EventType.EndWrite);
}
catch (Exception ex)
{
_queryInfos[streamId].Exception = ex;
_queryInfos[streamId].ReadTask.RunSynchronously();
}
}
private void SendQuery()
{
while (true)
{
QueryInfo queryInfo;
lock (_lock)
{
while (!_isClosed && 0 == _pendingQueries.Count)
{
Monitor.Wait(_lock);
}
if (_isClosed)
{
Monitor.Pulse(_lock);
return;
}
queryInfo = _pendingQueries.Dequeue();
}
try
{
// acquire the global lock to write the request
InstrumentationToken token = queryInfo.Token;
bool tracing = 0 != (token.ExecutionFlags & ExecutionFlags.ServerTracing);
using (BufferingFrameWriter bufferingFrameWriter = new BufferingFrameWriter(tracing))
{
queryInfo.Write(bufferingFrameWriter);
ushort streamId;
lock (_lock)
{
while (!_isClosed && 0 == _availableStreamIds.Count)
{
Monitor.Wait(_lock);
}
if (_isClosed)
{
queryInfo.NotifyError(new OperationCanceledException());
_instrumentation.ClientTrace(token, EventType.Cancellation);
Monitor.Pulse(_lock);
return;
}
streamId = _availableStreamIds.Pop();
}
_logger.Debug("Starting writing frame for stream {0}@{1}", streamId, Endpoint);
_instrumentation.ClientTrace(token, EventType.BeginWrite);
_queryInfos[streamId] = queryInfo;
bufferingFrameWriter.SendFrame(streamId, _socket);
_logger.Debug("Done writing frame for stream {0}@{1}", streamId, Endpoint);
_instrumentation.ClientTrace(token, EventType.EndWrite);
}
}
catch (Exception ex)
{
queryInfo.NotifyError(ex);
if (IsStreamInBadState(ex))
{
throw;
}
}
}
}
