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Posted to user@shiro.apache.org by Christian Scharr <Ch...@hsh-berlin.com> on 2011/10/12 10:05:58 UTC

Problems using Shiro annotations

Hi there,

 

using Shiro along with "JBoss RESTeasy" for fast rest-based
web-application development I'm running into some mysterious
NullPointerExceptions :-/

 

Example-Code:

----------

@POST

@Path("/{contactType}")

@Produces(MediaType.APPLICATION_JSON)

@Consumes(MediaType.APPLICATION_JSON)

@RequiresUser

public static Response createContact(@PathParam("contactType") String
contactType, String request)

{

                // do something

}

----------

 

Sending an POST-Request to the site produces the following Exception:

----------

[...]

Caused by: java.lang.NullPointerException

                at
org.apache.shiro.aop.DefaultAnnotationResolver.getAnnotation(DefaultAnno
tationResolver.java:62)

                at
org.apache.shiro.aop.AnnotationMethodInterceptor.getAnnotation(Annotatio
nMethodInterceptor.java:148)

                at
org.apache.shiro.aop.AnnotationMethodInterceptor.supports(AnnotationMeth
odInterceptor.java:134)

                at
org.apache.shiro.authz.aop.AnnotationsAuthorizingMethodInterceptor.asser
tAuthorized(AnnotationsAuthorizingMethodInterceptor.java:99)

                at
org.apache.shiro.authz.aop.AuthorizingMethodInterceptor.invoke(Authorizi
ngMethodInterceptor.java:38)

                at
org.apache.shiro.aspectj.AspectjAnnotationsAuthorizingMethodInterceptor.
performBeforeInterception(AspectjAnnotationsAuthorizingMethodInterceptor
.java:61)

                at
org.apache.shiro.aspectj.ShiroAnnotationAuthorizingAspect.executeAnnotat
edMethod(ShiroAnnotationAuthorizingAspect.java:52)

----------

 

Looking into org.apache.shiro.aop.DefaultAnnotationResolver at line 62:

 

return annotation == null ? mi.getThis().getClass().getAnnotation(clazz)
: annotation;

 

So the only possible source of the NullPointer seems to be
"mi.getThis()" for me...

 

Any suggestions how to avoid and/or solve this?

 

 

Greets,

 

Christian Scharr

RE: Problems using Shiro annotations

Posted by Christian Scharr <Ch...@hsh-berlin.com>.
Hi,

after some more testing, it seems that the NullPointerException occurs everytime when an annotated method has one or more parameters (annotating the parameter or not seems to be irrelevant).
Removing the method-parameter directly prevents Shiro throwing the NullPointerException...

Is this an known bug of AspectJ Shiro authorization package or should I fill a JIRA ticket?

Greets,

Christian

> Hi there,
> 
> using Shiro along with "JBoss RESTeasy" for fast rest-based web-application development I'm running into some mysterious NullPointerExceptions :-/
>
> Example-Code:
> ----------
> @POST
> @Path("/{contactType}")
> @Produces(MediaType.APPLICATION_JSON)
> @Consumes(MediaType.APPLICATION_JSON)
> @RequiresUser
> public static Response createContact(@PathParam("contactType") String contactType, String request)
> {
>                // do something
> }
> ----------
>
> Sending an POST-Request to the site produces the following Exception:
> ----------
> […]
> Caused by: java.lang.NullPointerException
>                at org.apache.shiro.aop.DefaultAnnotationResolver.getAnnotation(DefaultAnnotationResolver.java:62)
>                at org.apache.shiro.aop.AnnotationMethodInterceptor.getAnnotation(AnnotationMethodInterceptor.java:148)
>                at org.apache.shiro.aop.AnnotationMethodInterceptor.supports(AnnotationMethodInterceptor.java:134)
>                at org.apache.shiro.authz.aop.AnnotationsAuthorizingMethodInterceptor.assertAuthorized(AnnotationsAuthorizingMethodInterceptor.java:99)
>                at org.apache.shiro.authz.aop.AuthorizingMethodInterceptor.invoke(AuthorizingMethodInterceptor.java:38)
>                at org.apache.shiro.aspectj.AspectjAnnotationsAuthorizingMethodInterceptor.performBeforeInterception(AspectjAnnotationsAuthorizingMethodInterceptor.java:61)
>                at org.apache.shiro.aspectj.ShiroAnnotationAuthorizingAspect.executeAnnotatedMethod(ShiroAnnotationAuthorizingAspect.java:52)
> ----------
>
> Looking into org.apache.shiro.aop.DefaultAnnotationResolver at line 62:
>
> return annotation == null ? mi.getThis().getClass().getAnnotation(clazz) : annotation;
>
> So the only possible source of the NullPointer seems to be "mi.getThis()" for me…
>
> Any suggestions how to avoid and/or solve this?
>
>
> Greets,
>
> Christian Scharr