private bool RunLoop()
{
if (_provider.HasPendingRecords)
{
while (_currentParticipant < _provider._trackingParticipants.Count)
{
TrackingParticipant participant = _provider._trackingParticipants[_currentParticipant];
RuntimeTrackingProfile runtimeProfile = _provider.GetRuntimeTrackingProfile(participant);
if (_provider._pendingTrackingRecords != null)
{
while (_currentRecord < _provider._pendingTrackingRecords.Count)
{
bool completedSynchronously = PostTrackingRecord(participant, runtimeProfile);
if (!completedSynchronously)
{
return(false);
}
}
}
_currentRecord = 0;
_currentParticipant++;
}
}
// We've now tracked all of the records.
_provider.ClearPendingRecords();
return(true);
}
public TrackAsyncResult(TrackingParticipant participant, TrackingRecord record, TimeSpan timeout, AsyncCallback callback, object state)
: base(callback, state)
{
_participant = participant;
_record = record;
_timeout = timeout;
ActionItem.Schedule(s_asyncExecuteTrack, this);
}
public void AddParticipant(TrackingParticipant participant)
{
if (_trackingParticipants == null)
{
_trackingParticipants = new List <TrackingParticipant>();
_profileSubscriptions = new Dictionary <TrackingParticipant, RuntimeTrackingProfile>();
}
_trackingParticipants.Add(participant);
}
public void FlushPendingRecords(TimeSpan timeout)
{
try
{
if (this.HasPendingRecords)
{
TimeoutHelper helper = new TimeoutHelper(timeout);
for (int i = 0; i < _trackingParticipants.Count; i++)
{
TrackingParticipant participant = _trackingParticipants[i];
RuntimeTrackingProfile runtimeProfile = GetRuntimeTrackingProfile(participant);
// HasPendingRecords can be true for the sole purpose of populating our initial profiles, so check again here
if (_pendingTrackingRecords != null)
{
for (int j = 0; j < _pendingTrackingRecords.Count; j++)
{
TrackingRecord currentRecord = _pendingTrackingRecords[j];
Fx.Assert(currentRecord != null, "We should never come across a null context.");
TrackingRecord preparedRecord = null;
bool shouldClone = _trackingParticipants.Count > 1;
if (runtimeProfile == null)
{
preparedRecord = shouldClone ? currentRecord.Clone() : currentRecord;
}
else
{
preparedRecord = runtimeProfile.Match(currentRecord, shouldClone);
}
if (preparedRecord != null)
{
participant.Track(preparedRecord, helper.RemainingTime());
if (TD.TrackingRecordRaisedIsEnabled())
{
TD.TrackingRecordRaised(preparedRecord.ToString(), participant.GetType().ToString());
}
}
}
}
}
}
}
finally
{
// Note that if we fail to track yet the workflow manages to recover
// we will attempt to track those records again.
ClearPendingRecords();
}
}
private bool PostTrackingRecord(TrackingParticipant participant, RuntimeTrackingProfile runtimeProfile)
{
TrackingRecord originalRecord = _provider._pendingTrackingRecords[_currentRecord];
_currentRecord++;
bool isSuccessful = false;
try
{
TrackingRecord preparedRecord = null;
bool shouldClone = _provider._trackingParticipants.Count > 1;
if (runtimeProfile == null)
{
preparedRecord = shouldClone ? originalRecord.Clone() : originalRecord;
}
else
{
preparedRecord = runtimeProfile.Match(originalRecord, shouldClone);
}
if (preparedRecord != null)
{
IAsyncResult result = participant.BeginTrack(preparedRecord, _timeoutHelper.RemainingTime(), PrepareAsyncCompletion(s_trackingCompleteCallback), this);
if (TD.TrackingRecordRaisedIsEnabled())
{
TD.TrackingRecordRaised(preparedRecord.ToString(), participant.GetType().ToString());
}
if (result.CompletedSynchronously)
{
participant.EndTrack(result);
}
else
{
isSuccessful = true;
return(false);
}
}
isSuccessful = true;
}
finally
{
if (!isSuccessful)
{
_provider.ClearPendingRecords();
}
}
return(true);
}
private RuntimeTrackingProfile GetRuntimeTrackingProfile(TrackingParticipant participant)
{
TrackingProfile profile;
RuntimeTrackingProfile runtimeProfile;
if (!_profileSubscriptions.TryGetValue(participant, out runtimeProfile))
{
profile = participant.TrackingProfile;
if (profile != null)
{
runtimeProfile = RuntimeTrackingProfile.GetRuntimeTrackingProfile(profile, _definition);
Merge(runtimeProfile.Filter);
//Add the names to the list of activities that have subscriptions. This provides a quick lookup
//for the runtime to check if a TrackingRecord has to be created.
IEnumerable <string> activityNames = runtimeProfile.GetSubscribedActivityNames();
if (activityNames != null)
{
if (_activitySubscriptions == null)
{
_activitySubscriptions = new Dictionary <string, string>();
}
foreach (string name in activityNames)
{
if (_activitySubscriptions.ContainsKey(name))
{
_activitySubscriptions.Add(name, name);
}
else
{
_activitySubscriptions[name] = name;
}
}
}
}
else
{
//for null profiles, set all the filter flags.
Merge(new TrackingRecordPreFilter(true));
}
_profileSubscriptions.Add(participant, runtimeProfile);
}
return(runtimeProfile);
}
private static bool OnTrackingComplete(IAsyncResult result)
{
Fx.Assert(!result.CompletedSynchronously, "TrackingAsyncResult.OnTrackingComplete should not get called with a result that is CompletedSynchronously");
FlushPendingRecordsAsyncResult thisPtr = (FlushPendingRecordsAsyncResult)result.AsyncState;
TrackingParticipant participant = thisPtr._provider._trackingParticipants[thisPtr._currentParticipant];
bool isSuccessful = false;
try
{
participant.EndTrack(result);
isSuccessful = true;
}
finally
{
if (!isSuccessful)
{
thisPtr._provider.ClearPendingRecords();
}
}
return(thisPtr.RunLoop());
}
