public void UpdateSession(IEnumerable <EventSourceSettings> updatedEventSources)
{
Guard.ArgumentNotNull(updatedEventSources, "updatedEventSources");
var eventSourceComparer = new EventSourceSettingsEqualityComparer(nameOnly: true);
// updated sources
foreach (var currentSource in this.eventSources.Intersect(updatedEventSources, eventSourceComparer).ToArray())
{
var updatedSource = updatedEventSources.Single(s => s.Name == currentSource.Name);
if (updatedSource.Level != currentSource.Level ||
updatedSource.MatchAnyKeyword != currentSource.MatchAnyKeyword)
{
TraceEventUtil.EnableProvider(this.session, updatedSource.EventSourceId, updatedSource.Level, updatedSource.MatchAnyKeyword, sendManifest: false);
currentSource.Level = updatedSource.Level;
currentSource.MatchAnyKeyword = updatedSource.MatchAnyKeyword;
}
}
// new sources
foreach (var newSource in updatedEventSources.Except(this.eventSources, eventSourceComparer).ToArray())
{
TraceEventUtil.EnableProvider(this.session, newSource.EventSourceId, newSource.Level, newSource.MatchAnyKeyword, sendManifest: true);
this.eventSources.Add(newSource);
}
// removed sources
foreach (var removedSource in this.eventSources.Except(updatedEventSources, eventSourceComparer).ToArray())
{
this.session.DisableProvider(removedSource.EventSourceId);
this.eventSources.Remove(removedSource);
}
}
private void Initialize()
{
this.session = TraceEventUtil.CreateSession(this.sessionName);
// Hook up the ETWTraceEventSource to the specified session
this.source = new ETWTraceEventSource(this.sessionName, TraceEventSourceType.Session);
this.manifestCache = new TraceEventManifestsCache(this.source.Dynamic);
// get any previously cached manifest
this.manifestCache.Read();
// hook up to all incoming events and filter out manifests
this.source.Dynamic.All += e => this.ProcessEvent(e);
// listen to new manifests
this.source.Dynamic.ManifestReceived += m => this.OnManifestReceived(m);
// We collect all the manifests and save/terminate process when done
this.source.UnhandledEvent += e => this.ProcessUnhandledEvent(e);
foreach (var eventSource in this.eventSources)
{
// Bind the provider (EventSource/EventListener) with the session
TraceEventUtil.EnableProvider(this.session, eventSource.EventSourceId, eventSource.Level, eventSource.MatchAnyKeyword);
}
// source.Process() is blocking so we need to launch it on a separate thread.
this.workerTask = Task.Factory.StartNew(() => this.source.Process(), TaskCreationOptions.LongRunning).
ContinueWith(t => this.HandleProcessTaskFault(t));
}
public void UpdateSession(IEnumerable <Configuration.EventSourceSettings> updatedEventSources)
{
Guard.ArgumentNotNull(updatedEventSources, "updatedEventSources");
var updatedSources = updatedEventSources as Configuration.EventSourceSettings[] ?? updatedEventSources.ToArray();
var eventSourceNameComparer = new EventSourceSettingsEqualityComparer(nameOnly: true);
var eventSourceFullComparer = new EventSourceSettingsEqualityComparer(nameOnly: false);
// updated sources
foreach (var currentSource in this.eventSources.Intersect(updatedSources, eventSourceNameComparer).ToArray())
{
var updatedSource = updatedSources.Single(s => s.Name == currentSource.Name);
if (!eventSourceFullComparer.Equals(currentSource, updatedSource))
{
currentSource.CopyValuesFrom(updatedSource);
TraceEventUtil.EnableProvider(
this.session,
currentSource.EventSourceId,
currentSource.Level,
currentSource.MatchAnyKeyword,
currentSource.Arguments,
currentSource.ProcessNamesToFilter,
sendManifest: false);
}
}
// new sources
foreach (var newSource in updatedSources.Except(this.eventSources, eventSourceNameComparer).ToArray())
{
TraceEventUtil.EnableProvider(
this.session,
newSource.EventSourceId,
newSource.Level,
newSource.MatchAnyKeyword,
newSource.Arguments,
newSource.ProcessNamesToFilter,
sendManifest: true);
this.eventSources.Add(newSource);
}
// removed sources
foreach (var removedSource in this.eventSources.Except(updatedSources, eventSourceNameComparer).ToArray())
{
this.session.DisableProvider(removedSource.EventSourceId);
this.eventSources.Remove(removedSource);
}
}