8 Replies Latest reply on Dec 4, 2007 5:54 AM by thomas.diesler

Proxy Thread Safety

ropalka Dec 4, 2007 4:36 AM

Hi Team,

I'm using endpoint proxy created using methods Service.getPort(..., Class<?> sei) and I'm facing thread safety problem when invoking methods on proxy instance in multiple threads.
I'm not able to find anything about proxy thread safety in JAX-WS specification.
What about me I think proxy should be thread safe from method invocation point of view.
What do you think about it?

Richard

1. Re: Proxy Thread Safety

ropalka Dec 4, 2007 4:51 AM (in response to ropalka)

Hi again,

I'd like to extend my question to BindingProvider.getXYZContext() methods as well. Should these methods be thread safe too?
For example CXF makes it thread safe, see:

http://www.mail-archive.com/cxf-user@incubator.apache.org/msg00150.html

Richard
Actions
2. Re: Proxy Thread Safety

thomas.diesler Dec 4, 2007 5:04 AM (in response to ropalka)

A client proxy is inherently not thread safe. Making a remote call can be multiple step process i.e. setting binding properties first

The service is however thread safe and can be reused among multiple threads.
Actions
3. Re: Proxy Thread Safety

ropalka Dec 4, 2007 5:04 AM (in response to ropalka)

According to

http://forum.java.sun.com/thread.jspa?threadID=705659&messageID=4089586

it should be thread safe (from method invocation point of view)

Richard
Actions
4. Re: Proxy Thread Safety

thomas.diesler Dec 4, 2007 5:07 AM (in response to ropalka)

The post sais

4. What about each stub/port object? Is it thread-safe? (Iâ€™m
guessing no.)

Yes

Which I read as that the SunRI proxy is not thread safe either
Actions
5. Re: Proxy Thread Safety

ropalka Dec 4, 2007 5:26 AM (in response to ropalka)

Hi Thomas,

my mistake. Yes, you're right, SunRI proxy isn't thread safe as well

Richard
Actions
6. Re: Proxy Thread Safety

ropalka Dec 4, 2007 5:29 AM (in response to ropalka)

"thomas.diesler@jboss.com" wrote:
A client proxy is inherently not thread safe. Making a remote call can be multiple step process i.e. setting binding properties first.

Hi,

and if I share binding properties for each invocation, it should be thread safe or not (again from method invocation point of view)?

Richard
Actions
7. Re: Proxy Thread Safety

ropalka Dec 4, 2007 5:37 AM (in response to ropalka)

Thomas Diesler said:

The proxy holds state that is related to the invocation itself e.g. attachment parts, unbound header values, etc, thus it can't be shared via multiple threads.

Thanks

Richard
Actions
8. Re: Proxy Thread Safety

thomas.diesler Dec 4, 2007 5:54 AM (in response to ropalka)

More computing sins are committed in the name of efficiency (without necessarily achieving it) than for any other single reason - including blind stupidity.

- W.A. Wulf
Actions

Go to original post