private bool disposedValue = false; // To detect redundant calls
protected virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
if (disposing)
{
if (_trace != null)
{
_trace.OnEvent -= OnTraceEventInternal;
_trace?.Drop();
_trace?.Dispose();
_trace = null;
}
_connection?.Dispose();
_connection = null;
_server?.Disconnect();
_server?.Dispose();
_server = null;
if (_startingTimer != null)
{
_startingTimer.Stop();
_startingTimer.Elapsed -= OnTimerElapsed;
_startingTimer.Dispose();
_startingTimer = null;
}
}
disposedValue = true;
}
}
private static void SetupTrace(xlAmo.Trace trace, List <DaxStudioTraceEventClass> events)
{
Log.Debug("{class} {method} {event}", "QueryTraceEngineExcel", "SetupTrace", "enter");
trace.Events.Clear();
// Add CommandBegin so we can catch the heartbeat events
trace.Events.Add(TraceEventFactoryExcel.CreateTrace(xlAmo.TraceEventClass.CommandBegin));
// Add QueryEnd so we know when to stop the trace
trace.Events.Add(TraceEventFactoryExcel.CreateTrace(xlAmo.TraceEventClass.QueryEnd));
// catch the events in the ITraceWatcher
foreach (DaxStudioTraceEventClass eventClass in events)
{
// PowerPivot in Excel does not have direct query events, so skip it if makes it this far
if (eventClass == DaxStudioTraceEventClass.DirectQueryEnd)
{
continue;
}
var amoEventClass = (ExcelAmo.Microsoft.AnalysisServices.TraceEventClass)eventClass;
if (trace.Events.Find(amoEventClass) != null)
{
continue;
}
xlAmo.TraceEvent trcEvent = TraceEventFactoryExcel.CreateTrace(amoEventClass);
trace.Events.Add(trcEvent);
}
trace.Update();
Log.Debug("{class} {method} {event}", "QueryTraceEngineExcel", "SetupTrace", "exit");
}
public void Dispose()
{
if (_trace == null) return;
_trace.OnEvent -= OnTraceEventInternal;
_trace.Dispose();
_trace = null;
}
public void Start()
{
try
{
Log.Debug("{class} {method} {event}", "QueryTraceEngine", "Start", "entered");
if (_trace != null)
{
if (_trace.IsStarted || Status == QueryTraceStatus.Starting || Status == QueryTraceStatus.Started)
{
Log.Debug("{class} {method} {event}", "QueryTraceEngine", "Start", "exiting method - trace already started");
return; // if threturn; // exit here if trace is already startede trace is already running exit here
}
}
if (Status != QueryTraceStatus.Started)
{
Status = QueryTraceStatus.Starting;
}
Log.Debug("{class} {method} {event}", "QueryTraceEngine", "Start", "Connecting to: " + _connectionString);
//HACK - wait 1.5 seconds to allow trace to start
// using the ping method thows a connection was lost error when starting a second trace
_connection = new ADOTabular.ADOTabularConnection($"{_originalConnectionString};SessionId={_sessionId}", _connectionType);
_connection.Open();
_trace = GetTrace();
SetupTrace(_trace, Events);
_trace.OnEvent += OnTraceEventInternal;
_trace.Start();
// create timer to "ping" the server with DISCOVER_SESSION requests
// until the trace events start to fire.
if (_startingTimer == null)
{
_startingTimer = new Timer();
}
//HACK - wait 1.5 seconds to allow trace to start
// using the ping method thows a connection was lost error when starting a second trace
_startingTimer.Interval = 300;
_startingTimer.Elapsed += OnTimerElapsed;
_startingTimer.Enabled = true;
_startingTimer.Start();
utcPingStart = DateTime.UtcNow;
// Wait for Trace to become active
Log.Debug("{class} {method} {event}", "QueryTraceEngine", "Start", "exit");
}
catch (Exception ex)
{
OutputError($"Error starting trace: {ex.Message}");
Log.Error("{class} {method} {message} {stacktrace}", "QueryTraceEngine", "Start", ex.Message, ex.StackTrace);
}
}
//private void ServerPing()
//{
// _server.StartXmlaRequest(ExcelAmo.Microsoft.AnalysisServices.XmlaRequestType.Execute);
// _server.EndXmlaRequest();
//}
private xlAmo.Trace GetTrace()
{
if (_trace == null)
{
Log.Debug("{class} {method} {event}", "QueryTraceEngineExcel", "GetTrace", "about to create new trace");
_server = new xlAmo.Server();
_server.Connect(_connectionString);
_trace = _server.Traces.Add(string.Format("DaxStudio_Trace_SPID_{0}", _sessionId));
_trace.Filter = GetSessionIdFilter(_sessionId);
// set default stop time in case trace gets disconnected
//_trace.StopTime = DateTime.UtcNow.AddHours(24);
Log.Debug("{class} {method} {event}", "QueryTraceEngineExcel", "GetTrace", "created new trace");
}
return(_trace);
}
private xlAmo.Trace GetTrace()
{
if (_trace == null)
{
_server = new xlAmo.Server();
_server.Connect(_connectionString);
_trace = _server.Traces.Add( string.Format("DaxStudio_Trace_SPID_{0}", _sessionId));
_trace.Filter = GetSessionIdFilter(_sessionId);
_trace.OnEvent += OnTraceEventInternal;
}
return _trace;
}
public void Stop()
{
Status = QueryTraceStatus.Stopping;
if (_trace != null)
{
_trace.OnEvent -= OnTraceEventInternal;
try
{
_trace.Drop();
_trace = null;
Status = QueryTraceStatus.Stopped;
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e);
}
}
_traceStarted = false;
}
//public void Clear()
//{
// _trace.Events.Clear();
//}
public void Start()
{
if (_trace != null)
if (_trace.IsStarted || Status == QueryTraceStatus.Starting )
return; // if the trace is already running exit here
if (Status != QueryTraceStatus.Started) Status = QueryTraceStatus.Starting;
_connection = new ADOTabular.ADOTabularConnection(_connectionString, _connectionType);
_connection.Open();
_trace = GetTrace();
SetupTrace(_trace, _eventsToCapture);
_trace.Start();
// create timer to "ping" the server with DISCOVER_SESSION requests
// until the trace events start to fire.
if (_startingTimer == null)
_startingTimer = new Timer();
_startingTimer.Interval = 300; //TODO - make time interval shorter?
_startingTimer.Elapsed += OnTimerElapsed;
_startingTimer.Enabled = true;
_startingTimer.Start();
utcPingStart = DateTime.UtcNow;
// Wait for Trace to become active
}
