private void Reader_TraceRead(object sender, EventRecordEventArgs e)
{
if (this.token.IsCancellationRequested)
{
// If cancellation has been request, let the reader know that it's time to stop.
e.Cancel = true;
// Call completed.
this.OnCompleted();
return;
}
if (e.Record.EventHeader.EventDescriptor.Version < MinimumVersionSupported)
{
return;
}
var traceRecord = this.Lookup(new TraceIdentity(e.Record.EventHeader.EventDescriptor.Id, (TaskName)e.Record.EventHeader.EventDescriptor.Task));
if (traceRecord?.Target == null)
{
return;
}
traceRecord.Level = (TraceLevel)e.Record.EventHeader.EventDescriptor.Level;
traceRecord.TracingProcessId = e.Record.EventHeader.ProcessId;
traceRecord.ThreadId = e.Record.EventHeader.ThreadId;
traceRecord.TimeStamp = DateTime.FromFileTimeUtc(e.Record.EventHeader.TimeStamp);
traceRecord.Version = e.Record.EventHeader.EventDescriptor.Version;
traceRecord.PropertyValueReader = ValueReaderCreator.CreateRawByteValueReader(traceRecord.GetType(), traceRecord.Version, e.Record.UserData, e.Record.UserDataLength);
this.DispatchAsync(traceRecord, CancellationToken.None).GetAwaiter().GetResult();
}
public override async Task StartReadingAsync(IList <TraceRecordFilter> filters, DateTimeOffset startTime, DateTimeOffset endTime, CancellationToken token)
{
// Read all the Events and then dispatch them one by one.
var values = await this.GatherResultsAcrossTablesAsync(filters, startTime, endTime, token).ConfigureAwait(false);
foreach (var oneValue in values)
{
token.ThrowIfCancellationRequested();
ValidMandatoryFields(oneValue);
// We can make this a mandatory field. TODO
if (!oneValue.UserDataMap.ContainsKey(WellKnownFields.EventVersion))
{
continue;
}
var metadata = Mapping.TraceRecordAzureDataMap.SingleOrDefault(
item => item.EventType == oneValue.UserDataMap[WellKnownFields.EventType] &&
item.TaskName.ToString().Equals(oneValue.UserDataMap[WellKnownFields.TaskName]));
if (metadata == null)
{
throw new Exception(
string.Format(
CultureInfo.InvariantCulture,
"Can't Reverse transform for unknown Type. Type: {0}, Task: {1}",
oneValue.UserDataMap[WellKnownFields.EventType],
oneValue.UserDataMap[WellKnownFields.TaskName]));
}
var traceRecordRead = (TraceRecord)Activator.CreateInstance(metadata.Type, new object[] { null });
var traceRecord = this.Lookup(traceRecordRead.Identity);
if (traceRecord?.Target == null)
{
continue;
}
// Today, DCA, if it sees an ID field in event data, removes it and sets it value as the partition key. We need
// to do the reverse transformation now.
if (!oneValue.UserDataMap.ContainsKey(WellKnownFields.EventDataId) && oneValue.PartitionKey != string.Format(CultureInfo.InvariantCulture, "{0}.{1}", metadata.EventType, metadata.TaskName))
{
oneValue.UserDataMap.Add(WellKnownFields.EventDataId, oneValue.PartitionKey);
}
// TODO: This is a bug in DCA. It doesn't upload Critical information to the Tables today, so
// I've to resort to filling bogus values. We need to fix DCA.
traceRecord.Level = TraceLevel.Info;
traceRecord.TracingProcessId = 1;
traceRecord.ThreadId = 1;
traceRecord.Version = byte.Parse(oneValue.UserDataMap[WellKnownFields.EventVersion]);
traceRecord.TimeStamp = oneValue.TimeLogged.UtcDateTime;
traceRecord.PropertyValueReader = ValueReaderCreator.CreatePropertyBagValueReader(traceRecord.GetType(), traceRecord.Version, oneValue.UserDataMap);
this.DispatchAsync(traceRecord, CancellationToken.None).GetAwaiter().GetResult();
}
}
