Tom & Ralf,
Thanks for the answers.
One additional question: Is ClassDescriptorResolver not thread safe
during the use of the Unmarshaller and Marshaller objects, or just during
the construction?
For example, if I locked the ClassDescriptorResolver during the invocation
of marshaller.setResolver(), would that provide thread safety?
Or is the opposite true, that I need a distinct ClassDescriptorResolver
for each Marshaller and Unmarshaller object that is being used
concurrently?
If the latter is true, then I will likely maintain thread-local
ClassDescriptorResolver objects.
Thanks again,
Michael
Hi Tom,
you are right that the XML best practice document should point out that
ClassDescriptorResolver is not thread safe. Sorry for that confusion.
I'll take care to update docs or make ClassDescriptorResolver thread
safe for next release.
Regards
Ralf
Carey, Tom schrieb:
This link below talks about reusing ClassDescriptorResolvers to achieve best
performance. Is this link suggesting that it is thread-safe? If so, maybe
this page should be updated.
http://www.castor.org/xml-best-practice.html
Tom
-----Original Message-----
From: Ralf Joachim [mailto:[EMAIL PROTECTED]
Sent: Friday, November 03, 2006 2:50 AM
To: [email protected]
Subject: Re: [castor-user] ClassDescriptorResolver & thread safety
Hello Michael,
as far as I can see when looking at the source of XMLClassDescriptorResolver
it isn't thread safe by design. While I think there should be no problem if
all ClassDescriptor's are loaded before starting to un-/marshal, I'd suggest
to go safe and use them in a thread safe way. E.g. one CDR per thread or by
implementing a CDR pool.
Regards
Ralf
Michael Crozier schrieb:
Hello,
As outlined in the best practices document, I'm using
ClassDescriptorResolver to load and cache mappings. I understand that
Marshaller and Unmarshaller objects are not thread safe, but
ClassDescriptorResolver has no mention of thread-safety. I am using
this mechanism to load mappings from String objects and well as from
Files.
Is it thread-safe to share a single ClassDescriptorResolver instance
between many threads, in which new marshalling objects are created
per-invocation?
Many thanks,
Michael
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