Aspectjweaver.jar outputting on stderr vs stdout

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Aspectjweaver.jar outputting on stderr vs stdout

Eric B
I'm using AspectJ 1.6 with JBoss 4.2.1 configured with LoadTimeWeaving.

I have added the aspectjweaver.jar to the startup parameters:
 -javaagent:c:/dev/Java/aspectj1.6/lib/aspectjweaver.jar 

AspectJ is properly loaded and indeed is weaving my classes as desired/expected.  However, any weaveinfo data that it is producing is being logged as an "Error" as it appears in the stderr stream instead of the stdout:

2016-10-06 13:31:40,310 ERROR [STDERR] [UnifiedClassLoader3@333cf5e3] weaveinfo Join point 'method-call(business.impl.BusinessContext business.ejb3.ManagerBean.getBusinessContext(izone.business.BusinessContextInfo))' in Type 'business.ejb3.ManagerBean' (ManagerBean.java:112) advised by afterThrowing advice from 'common.security.logger.AccessDeniedLoggerAspect' (AccessDeniedLoggerAspect.java)


According to the JBoss documentation, System.err stream is redirected into a category called STDERR, which is what I see above.

Is there a way to configure the weaver to output on stdout instead?  Or is it working this way by design?

Thanks,

Eric



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Re: Aspectjweaver.jar outputting on stderr vs stdout

Andy Clement
First time I've ever looked at that bit of code but I do see the code says this in the WeavingAdaptor:

protected void createMessageHandler() {

messageHolder = new WeavingAdaptorMessageHolder(new PrintWriter(System.err));


So all messages sent to that message handler will go to System.err, regardless of severity. That seems a bit crappy. I guess presumably it was done to avoid messages messing up whatever your app was doing on System.out (possibly even just to make testing easier - look for app output on System.out and look for weaver output on System.err).

It should be configurable but right now I can't see any way you can influence it.

cheers,
Andy



On 6 October 2016 at 11:36, Eric B <[hidden email]> wrote:
I'm using AspectJ 1.6 with JBoss 4.2.1 configured with LoadTimeWeaving.

I have added the aspectjweaver.jar to the startup parameters:
 -javaagent:c:/dev/Java/aspectj1.6/lib/aspectjweaver.jar 

AspectJ is properly loaded and indeed is weaving my classes as desired/expected.  However, any weaveinfo data that it is producing is being logged as an "Error" as it appears in the stderr stream instead of the stdout:

2016-10-06 13:31:40,310 ERROR [STDERR] [UnifiedClassLoader3@333cf5e3] weaveinfo Join point 'method-call(business.impl.BusinessContext business.ejb3.ManagerBean.getBusinessContext(izone.business.BusinessContextInfo))' in Type 'business.ejb3.ManagerBean' (ManagerBean.java:112) advised by afterThrowing advice from 'common.security.logger.AccessDeniedLoggerAspect' (AccessDeniedLoggerAspect.java)


According to the JBoss documentation, System.err stream is redirected into a category called STDERR, which is what I see above.

Is there a way to configure the weaver to output on stdout instead?  Or is it working this way by design?

Thanks,

Eric



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Re: Aspectjweaver.jar outputting on stderr vs stdout

Eric B
Ok - thanks for the confirmation.  I will have to let the team know that all ERROR logs are not actual ERROR logs, but only INFO logs.

Eric

On Thu, Oct 6, 2016 at 3:26 PM, Andy Clement <[hidden email]> wrote:
First time I've ever looked at that bit of code but I do see the code says this in the WeavingAdaptor:

protected void createMessageHandler() {

messageHolder = new WeavingAdaptorMessageHolder(new PrintWriter(System.err));


So all messages sent to that message handler will go to System.err, regardless of severity. That seems a bit crappy. I guess presumably it was done to avoid messages messing up whatever your app was doing on System.out (possibly even just to make testing easier - look for app output on System.out and look for weaver output on System.err).

It should be configurable but right now I can't see any way you can influence it.

cheers,
Andy



On 6 October 2016 at 11:36, Eric B <[hidden email]> wrote:
I'm using AspectJ 1.6 with JBoss 4.2.1 configured with LoadTimeWeaving.

I have added the aspectjweaver.jar to the startup parameters:
 -javaagent:c:/dev/Java/aspectj1.6/lib/aspectjweaver.jar 

AspectJ is properly loaded and indeed is weaving my classes as desired/expected.  However, any weaveinfo data that it is producing is being logged as an "Error" as it appears in the stderr stream instead of the stdout:

2016-10-06 13:31:40,310 ERROR [STDERR] [UnifiedClassLoader3@333cf5e3] weaveinfo Join point 'method-call(business.impl.BusinessContext business.ejb3.ManagerBean.getBusinessContext(izone.business.BusinessContextInfo))' in Type 'business.ejb3.ManagerBean' (ManagerBean.java:112) advised by afterThrowing advice from 'common.security.logger.AccessDeniedLoggerAspect' (AccessDeniedLoggerAspect.java)


According to the JBoss documentation, System.err stream is redirected into a category called STDERR, which is what I see above.

Is there a way to configure the weaver to output on stdout instead?  Or is it working this way by design?

Thanks,

Eric



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