c# - Web API - Set each thread with the HttpRequestMessage id? -


i have web api coded in c#.

the web api uses functionality shared other in-house components. depends on single threaded flows , uses thread local storage store objects, , session information. please don't if it's or bad, that's have deal with.

in web api i've implemented custom message handler (delagatinghandler) sendasync

protected async override system.threading.tasks.task<httpresponsemessage> sendasync(httprequestmessage request, system.threading.cancellationtoken cancellationtoken)

which based on tpl , switches threads, , when happens, thread based functionality gets messed up, since i'm losing thread context , data assigned it.

my idea uniquely identify httprequestmessage, think using correlation id should sufficient it

var requestid = request.getcorrelationid();

but want store correlation id of httprequestmessage per each thread allocated in task.

so question if can identify thread that's being allocated under specific task , allocate id it?

for context related problems, can use callcontext.logicalsetdata , callcontext.logicalgetdata, merely idictionary<string, object> flows between contexts, , has copy-on-write (shallow copy) semantics.

since data immutable (according docs), can map correlation id threads managed thread id:

protected async override task<httpresponsemessage> sendasync(                          httprequestmessage request,                           cancellationtoken cancellationtoken) {     var correlationid = request.getcorrelationid();     var threadid = thread.currentthread.managedthreadid;      callcontext.logicalsetdata(correlationid.tostring(), threadid); }

and later retrieve if make sure you're on "valid thread".

a read on call context async-await can found here.


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