Re: [undertow-dev] Threading model used for handler processing.
A single handler is shared by all threads (in much the same way as Servlet's). If a
handler has any form of mutable state it needs to be thread safe.
Stuart
----- Original Message -----
From: "Jason Kania" <jason.kania(a)ymail.com>
To: undertow-dev(a)lists.jboss.org
Sent: Tuesday, 2 February, 2016 12:41:03 PM
Subject: [undertow-dev] Threading model used for handler processing.
Hi,
I am trying to create what I call a URL mapping handler that maps path and
query variables from the http request to java method parameters via
annotations. It is a bit like what Spring or JAX-RS does. The intent is to
reduce a bunch of the boilerplate associated with validation of incoming
requests, but nothing more than that.
One of the stumbling blocks I have come upon is threading model used in
calling handlers. I am trying to understand if
1) there is only meant to be a single handler shared by multiple threads such
that it must handle multithreading
2) the handler instances are somehow cloned.
3) one handler is being assigned to a single thread at a time.
Without me diving into the code to figure this out, can someone please
clarify this? To me this would be a good addition to the handler guide.
Thanks,
Jason
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