Is SoapHttpClientProtocol thread safe?

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+2 Q:

Is SoapHttpClientProtocol thread safe?

Hi,

I created a Web Service proxy with the "add web reference" feature of VS 2008 (c#).

The generated class derives from SoapHttpClientProtocol

Can I store only one instance of my proxy in a singleton? Is it thread safe? Is there state between calls that would prevent me from doing this?

Thanks!

Per this link: http://msdn.microsoft.com/en-us/library/system.web.services.protocols.soaphttpclientprotocol.aspx

at the bottom under 'thread safety' it says this type is thread safe. I do however not know that using it as a Singleton will be Thread safe.

Tony 2009-12-17 14:44:42

MSDN makes no mention that it's thread safe:

Thread Safety

This type is thread safe.

The class is safe, no mention of the object.

But it is safe to say that that it's not thread safe - no object in the .NET library is thread safe.

(At least i've never seen one)

Ian Boyd 2009-12-17 14:46:50

Usually for non-threadsafe types the wording would be "All class members are guaranteed to be thread-safe. All instance members are not guaranteed to be thread-safe." so I'd assume that "This type is thread-safe" implies both class and instance members.

Joey 2009-12-17 14:57:22

ok I'm confused... maybe a better question would have been: "Is creating an instance of the web service proxy for each call to a web method a performance downer?" :P

Mike Gleason jr Couturier 2009-12-17 15:02:50

i assume by "type" they mean just the type (it's type information), as opposed to static class members, or instance members, which are not thread-safe.

Ian Boyd 2009-12-18 00:02:15

+1 A:

No. It is not thread safe. the client must be in the Open state to enable calls. A simple scenario where one thread does client.Close() while another tries to call a method will fail.

AZ 2009-12-18 16:35:43

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Is SoapHttpClientProtocol thread safe?

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