private void onMessage(object sender, MsgHandlerEventArgs e)
{
Msg msg = e.Message;
String subj = msg.Subject;
Service.Log.Trace("Q=> {0}: {1}", subj, Encoding.UTF8.GetString(msg.Data));
Resource.Service.With(Resource, () =>
{
if (callback == null)
{
return;
}
QueryRequest qr;
try
{
QueryRequestDto reqInput = JsonUtils.Deserialize <QueryRequestDto>(msg.Data);
if (String.IsNullOrEmpty(reqInput.Query))
{
Service.OnError("Missing query in query request {0}", Resource.ResourceName);
new QueryRequest(Resource, msg).RawResponse(ResService.ResponseMissingQuery);
return;
}
qr = new QueryRequest(Resource.CloneWithQuery(reqInput.Query), msg);
}
catch (Exception ex)
{
Service.OnError("Error deserializing query request {0}: {1}", Resource.ResourceName, ex.Message);
new QueryRequest(Resource, msg).RawResponse(ResService.ResponseBadRequest);
return;
}
try
{
callback(qr);
}
catch (ResException ex)
{
if (!qr.Replied)
{
// If a reply isn't sent yet, send an error response,
// as throwing a ResException within a query callback
// is considered valid behaviour.
qr.Error(new ResError(ex));
return;
}
Service.OnError("Error handling query request {0}: {1} - {2}", qr.ResourceName, ex.Code, ex.Message);
}
catch (Exception ex)
{
if (!qr.Replied)
{
qr.Error(new ResError(ex));
}
// Write to log as only ResExceptions are considered valid behaviour.
Service.OnError("Error handling query request {0}: {1}", qr.ResourceName, ex.Message);
return;
}
if (qr.Replied)
{
return;
}
if (qr.Events.Count == 0)
{
qr.RawResponse(ResService.ResponseNoQueryEvents);
}
else
{
qr.Result(new QueryResponseDto(qr.Events));
}
});
}
