private void addTopicHandler_Success(object sender, Handlers.TopicEventArgs e)
{
// At least one of our topics has been added.
Log.Spew("Topic Added: \"" + e.TopicPath + "\"");
while (topicPathsPendingAddition.Remove(e.TopicPath))
{
;
}
if (0 == topicPathsPendingAddition.Count)
{
AddTopicSources();
}
}
private void session_StateChanged(object sender, SessionListenerEventArgs e)
{
Log.Spew("session_StateChanged:\n\tfrom " + e.OldState + "\n\tto " + e.NewState);
var justConnected = e.NewState.Connected && !e.OldState.Connected;
var justDisconnected = !e.NewState.Connected && e.OldState.Connected;
if (justConnected)
{
topicManager = new TopicManager(e.Session, directInputManager, car, refreshIntervalManager, metrics);
}
if (justDisconnected)
{
topicManager = null;
}
}
private void topicDetailsHandler_Success(object sender, Handlers.TopicDetailsEventArgs e)
{
Log.Spew("Queried Topic: \"" + e.TopicPath + "\"");
if (!rootTopicPath.Equals(e.TopicPath))
{
throw new InvalidOperationException("Topic details received for unexpected topic path.");
}
if (null == e.TopicDetails)
{
// The root topic path does not yet exist so we need to create it implicitly
// by creating the child nodes.
Log.Spew("Creating topic tree...");
var addTopicHandler = new Handlers.AddTopicHandler();
addTopicHandler.Success += addTopicHandler_Success;
AddTopic(addTopicHandler, steeringTopicPath);
AddTopic(addTopicHandler, brakingTopicPath);
AddTopic(addTopicHandler, accelerationTopicPath);
AddTopic(addTopicHandler, gearTopicPath);
AddTopic(addTopicHandler, refreshIntervalTopicPath, TopicType.RECORD);
AddTopic(addTopicHandler, buttonStatesTopicPath, TopicType.RECORD);
AddTopic(addTopicHandler, buttonNamesTopicPath, TopicType.RECORD);
AddTopic(addTopicHandler, countOfUpdatesMetricTopicPath);
AddTopic(addTopicHandler, upTimeInSecondsMetricTopicPath);
AddTopic(addTopicHandler, countOfSuccessfulTopicSourceUpdatesMetricTopicPath);
AddTopic(addTopicHandler, countOfFailedTopicSourceUpdatesMetricTopicPath);
AddTopic(addTopicHandler, rateOfUpdatesPerSecondMetricTopicPath);
AddTopic(addTopicHandler, rateOfSuccessfulTopicSourceUpdatesPerSecond);
}
else
{
// The root topic path exists so we need to start updating it.
// (I am making the assumption that all of the topics I need to have added
// below this root will be there... this could break if I add a new topic to the
// tree in this codebase without restarting the Diffusion server or removing the
// root topic first.)
AddTopicSources();
}
}
private void AddTopicSources()
{
Log.Spew("Adding topic sources...");
topicUpdateControl.AddTopicSource(steeringTopicPath, new TopicSources.SteeringTopicSource(carControlsDataGenerator));
topicUpdateControl.AddTopicSource(brakingTopicPath, new TopicSources.BrakingTopicSource(carControlsDataGenerator));
topicUpdateControl.AddTopicSource(accelerationTopicPath, new TopicSources.AccelerationTopicSource(carControlsDataGenerator));
topicUpdateControl.AddTopicSource(gearTopicPath, new TopicSources.GearTopicSource(carStateDataGenerator));
topicUpdateControl.AddTopicSource(refreshIntervalTopicPath, new TopicSources.RefreshIntervalTopicSource(refreshIntervalManager));
topicUpdateControl.AddTopicSource(buttonStatesTopicPath, new TopicSources.ButtonStatesTopicSource(carControlsDataGenerator));
topicUpdateControl.AddTopicSource(buttonNamesTopicPath, new TopicSources.ButtonNamesTopicSource());
Handlers.TopicSourceUpdateHandler.Singleton.Metrics = metrics;
topicUpdateControl.AddTopicSource(countOfUpdatesMetricTopicPath, new TopicSources.MetricsTopicSource(metrics, Metrics.Types.CountOfUpdates));
topicUpdateControl.AddTopicSource(upTimeInSecondsMetricTopicPath, new TopicSources.MetricsTopicSource(metrics, Metrics.Types.UpTimeInSeconds));
topicUpdateControl.AddTopicSource(countOfSuccessfulTopicSourceUpdatesMetricTopicPath, new TopicSources.MetricsTopicSource(metrics, Metrics.Types.CountOfSuccessfulTopicSourceUpdates));
topicUpdateControl.AddTopicSource(countOfFailedTopicSourceUpdatesMetricTopicPath, new TopicSources.MetricsTopicSource(metrics, Metrics.Types.CountOfFailedTopicSourceUpdates));
topicUpdateControl.AddTopicSource(rateOfUpdatesPerSecondMetricTopicPath, new TopicSources.MetricsTopicSource(metrics, Metrics.Types.RateOfUpdatesPerSecond));
topicUpdateControl.AddTopicSource(rateOfSuccessfulTopicSourceUpdatesPerSecond, new TopicSources.MetricsTopicSource(metrics, Metrics.Types.RateOfSuccessfulTopicSourceUpdatesPerSecond));
}
Program()
{
directInputManager = new DataGenerators.DirectInputManager();
metrics = new Metrics();
refreshIntervalManager = new RefreshIntervalManager();
car = new DataGenerators.Car(directInputManager, refreshIntervalManager);
// In order for us to see Exception instances thrown from our own (application) code
// executing within a callback from the Diffusion SDK, we need to direct log output
// to the Console.
LogService.ActiveLoggerType = LoggerType.Console;
LogService.SetThresholdForLogger(LoggerType.Console, LogSeverity.Error);
var sessionFactory = Diffusion.Sessions
.ConnectionTimeout(5000) // milliseconds
.SessionErrorHandler(session_Error)
.SessionStateChangedHandler(session_StateChanged);
// I get SessionStateChanged event before this method returns
string diffusionServerURL = Properties.Settings.Default.DiffusionServerURL;
Log.Spew("Connecting to Diffusion Server at \"" + diffusionServerURL + "\"...");
sessionFactory.Open(diffusionServerURL).Start();
}
private void session_Error(object sender, SessionErrorHandlerEventArgs e)
{
Log.Spew("session_Error: " + e.Error);
}