Hi Marko
On 03/04/12 11:45, Voß, Marko wrote:
Hello Sergey,
I see. Thank you again. So do I even need to care about thread-safety on the
services then or do I have to use the
SpringResourceFactory here?
As far as the thread safety of Contexts injected into the class fields
is concerned, it does not matter what lifecycle a given root resource
follows, the runtime will make sure the contexts are thread safe,
injecting tl proxies in case of singletons, or plain instances in case
per-request root resources.
The thread safety of the custom local data is another issue altogether,
you can use SpringResourceFactory to enforce per-request instantiation
of root resources if you'd to avoid syncing on the custom data/state...
Cheers, Sergey
Best regards,
Marko
Am 03.04.2012 10:34, schrieb Sergey Beryozkin:
Hi Marko
On 03/04/12 11:25, Voß, Marko wrote:
Hello,
We have to use @Context to get access to MessageContext and/or any of the other
supported classes.
We cannot use @Context in the method signatures of the JAX-RS interfaces,
because of these interfaces should be reused
on the client-side.
So we have to use @Context on class fields, which leads to the problem of
thread-safety.
Even if I setup the service beans to be prototypes, they are still singletons,
which is most-likely happening because of
the implementation of:
org.apache.cxf.jaxrs.JAXRSServiceFactoryBean#setResourceClassesFromBeans
Which is not following the rules of the spring beans, I guess.
You'd need to use SpringResourceFactory to get the bean scopes properly
enforced, see
http://cxf.apache.org/docs/jaxrs-services-configuration.html#JAXRSServicesConfiguration-FromSpring
Also, when debugging this, I noticed that even the MessageContext instance was
the same instance for multiple threads.
It's a thread-local proxy
So if I change the HttpHeaders in one thread, this will affect the HttpHeaders
in another thread.
The thread safety is enforced via a thread local proxy, so it should not be the
case
How am I supposed to use @Context, reuse the JAX-RS interface on client-side
and be thread-safe? Any ideas?
Inject contexts in fields and this should be OK for proxies :-). From 2.5.3 it
will be possible to use proxies with
Contexts in the method signatures too, proxies would need to set 'null'
HTH, Sergey
Best regards,
--
Sergey Beryozkin
Talend Community Coders
http://coders.talend.com/
Blog: http://sberyozkin.blogspot.com
