ThreadPool.QueueUserWorkItem uses ASP.Net

Question

In Asp.Net for creating a huge pdf report iam using \"ThreadPool.QueueUserWorkItem\", My requirement is report has to be created asynchronously , and i do not want to wait f

Answer 1

In addition to what Anders Abel has already laid out, which I agree with entirely, you should consider that ASP.NET also uses the thread pool to respond to requests, so if you have long running work like this using up a thread pool thread, it is technically stealing from the resources which ASP.NET is able to use to fulfill other requests anyway.

If you were to ask me how best to architect it I would say you dispatch the work to a WCF service using one way messaging over the MSMQ transport. That way it is fast to dispatch, resilient to failure and processing of the requests on the WCF side can be more tightly controlled because the messages will just sit on the queue waiting to be processed. So if your server can only create 10 PDFs at a time you would just set the maxConcurrentCalls for the WCF service to 10 and it will only pull a maximum of 10 messages off the queue at once. Also, if your service shuts down, when it starts up it will just begin processing again.