private ITransaction TryCreateTransaction(IAgent agent, HttpContext httpContext, string requestNotification)
{
// MapRequestHandler is always called so if we make it past that without having already started a transaction then don't start one since we already missed too much. This is likely to occur during startup when the transaction service spins up half way through a request.
var earlyEnoughInTransactionLifecycleToCreate = Statics.PossibleEvents
.TakeWhile(@event => @event != "AcquireRequestState")
.Where(@event => @event == requestNotification)
.Any();
if (!earlyEnoughInTransactionLifecycleToCreate)
{
return(agent.CurrentTransaction);
}
Action onCreate = () =>
{
HttpContextActions.TransactionStartup(agent, httpContext);
};
return(agent.CreateTransaction(
isWeb: true,
category: EnumNameCache <WebTransactionType> .GetName(WebTransactionType.ASP),
transactionDisplayName: "Integrated Pipeline",
doNotTrackAsUnitOfWork: true,
wrapperOnCreate: onCreate));
}
private void BeforeEvent(MethodCall methodCall, IAgent agent, string eventName, HttpApplication httpApplication)
{
if (httpApplication == null)
{
throw new ArgumentNullException("httpApplication");
}
var httpContext = httpApplication.Context;
if (httpContext == null)
{
throw new NullReferenceException("httpApplication.Context");
}
ITransaction transaction;
if (eventName == "BeginRequest")
{
Action onCreate = () =>
{
HttpContextActions.TransactionStartup(agent, httpContext);
};
transaction = agent.CreateTransaction(
isWeb: true,
category: EnumNameCache <WebTransactionType> .GetName(WebTransactionType.ASP),
transactionDisplayName: "Classic Pipeline",
doNotTrackAsUnitOfWork: true,
wrapperOnCreate: onCreate);
}
else
{
transaction = agent.CurrentTransaction;
}
var segment = transaction.StartTransactionSegment(methodCall, eventName);
httpContext.Items[HttpContextActions.HttpContextSegmentKey] = segment;
}