[jacorb-developer] JacORB and SLF dependency (was Re: JacORb in maven repository)

Timothy Astle timothy.astle at caris.com
Thu Jun 7 16:11:17 CEST 2012 

Comments below inline.

On 07/06/2012 10:30 AM, Nick Cross wrote:
>
> Hi,
>
> Thanks for the reply. So, its not specifically to do with the version 
> of Java (5/6/7) versus the slf4j-binding adapter.
>
> I presume you must also be supplying slf4j-api version 1.5 as well?
Exactly, we have 1.5.
> From the explanation at http://www.slf4j.org/codes.html#version_mismatch
>  it would appear that there is an underlying conflict. Have you tried 
> simply replacing all slf4j libraries with the 1.5 versions?
>
> I think SLF4J would emit a warning multiple bindings on the classpath? 
> e.g. slf4j-log4j12-1.5.10.jar and slf4j-jdk14-1.6.4.jar ?
Yup, that's what the warning message says in the below stack trace.
>
> As the -api and -jdk14 libs need to be paired, while it might be 
> possible to support a range of 1.6.x I don't think SLF4J would allow 
> much leeway here. 
I'm not sure about this without playing with it.  If a range exists for 
the API, then it would be within the applications ability to specify a 
single dependency that matches both without exclusions (and taking the 
risk of supplying an unsupported version).  When an application pulls in 
a lot of varying libraries, it's nice when they can find a library 
version that intersects them all.  Perfect world scenario.  :)
> Also, I am not convinced the provided scope is quite correct for this 
> - normally SLF4J is required and is not provided hence the dependency.
I think you mean compile scope?  I agree that the API should be compile 
scope.  I'm just thinking that the binding may be of another scope.  I 
understand you'd need a binding for your own testing, but at the very 
least I'm guessing (never tried this) it sounds like it could be a 
provided dependency.  That means it'd be like the servlet-api.  It's 
available for compilation and execution, but when deployed it isn't 
shipped with it because it's a part of the servlet container.

Here is a list of the bindings:
http://www.slf4j.org/manual.html

And here is Maven dependency scope:
http://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#Dependency_Scope

Either way, it's awesome to have JacORB on Maven Central.  Just 
something to think about.

Best wishes,


Tim


>
> Thanks
>
> Nick
>
>
>
> On 07/06/12 14:08, Timothy Astle wrote:
>> Sure. SLF has various logger bindings from how I understand it. As the
>> application developer, they must choose what logging implementation that
>> SLF will use and provide that connector. Options include: JULI, log4j,
>> logback, etc. The reason is because if someone wrote an application
>> based on log4j, they'd want the 3rd party component to use the same
>> logging configuration.
>>
>> We already have a binding provided in our application. What's trickier
>> is that we also have an older version of SLF. Then we updated to JacORB
>> 3 and it provided the JULI binding. Below you can see what happens when
>> I launch the web application with both bindings in place and using an
>> older SLF.
>>
>> [WARNING] [talledLocalContainer] Jun 07, 2012 9:51:04 AM
>> org.apache.catalina.startup.HostConfig deployWAR
>> [WARNING] [talledLocalContainer] INFO: Deploying web application archive
>> D:\Work\myapp\target\cargo\configurations\tomcat7x\webapps\myapp.war
>> [WARNING] [talledLocalContainer] SLF4J: The requested version 1.6 by
>> your slf4j binding is not compatible with [1.5.5, 1.5.6, 1.5.7, 1.5.8,
>> 1.5.9, 1.5.10]
>> [WARNING] [talledLocalContainer] SLF4J: See
>> http://www.slf4j.org/codes.html#version_mismatch for further details.
>> [WARNING] [talledLocalContainer] SLF4J: Class path contains multiple
>> SLF4J bindings.
>> [WARNING] [talledLocalContainer] SLF4J: Found binding in
>> [jar:file:/D:/Work/myapp/target/cargo/configurations/tomcat7x/webapps/spatialfusionviewer/WEB-INF/lib/slf4j-jdk14-1.6.4.jar!/org/slf4j/impl/StaticLoggerBind 
>>
>> [WARNING] [talledLocalContainer] SLF4J: Found binding in
>> [jar:file:/D:/Work/myapp/target/cargo/configurations/tomcat7x/webapps/spatialfusionviewer/WEB-INF/lib/slf4j-log4j12-1.5.10.jar!/org/slf4j/impl/StaticLoggerB 
>>
>> [WARNING] [talledLocalContainer] SLF4J: See
>> http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
>> [WARNING] [talledLocalContainer] Jun 07, 2012 9:51:17 AM
>> org.apache.catalina.core.StandardContext listenerStart
>> [WARNING] [talledLocalContainer] SEVERE: Exception sending context
>> initialized event to listener instance of class
>> org.apache.struts2.tiles.StrutsTilesListener
>> [WARNING] [talledLocalContainer] java.lang.AbstractMethodError:
>> org.slf4j.impl.JDK14LoggerAdapter.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;Ljava/lang/Throwable;)V 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.commons.logging.impl.SLF4JLocationAwareLog.info(SLF4JLocationAwareLog.java:120) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.tiles.impl.BasicTilesContainer.init(BasicTilesContainer.java:125) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.tiles.factory.TilesContainerFactory.initializeContainer(TilesContainerFactory.java:232) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.tiles.factory.TilesContainerFactory.createTilesContainer(TilesContainerFactory.java:198) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.tiles.factory.TilesContainerFactory.createContainer(TilesContainerFactory.java:163) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.tiles.web.startup.TilesListener.createContainer(TilesListener.java:90) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.struts2.tiles.StrutsTilesListener.createContainer(StrutsTilesListener.java:68) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.tiles.web.startup.TilesListener.contextInitialized(TilesListener.java:57) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4779) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5273) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
>> [WARNING] [talledLocalContainer] at
>> org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895) 
>>
>> [WARNING] [talledLocalContainer] at
>> org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871)
>> [WARNING] [talledLocalContainer] at
>> org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
>> [WARNING] [talledLocalContainer] at
>> org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:962)
>> [WARNING] [talledLocalContainer] at
>> org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1603) 
>>
>> [WARNING] [talledLocalContainer] at
>> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
>> [WARNING] [talledLocalContainer] at
>> java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
>> [WARNING] [talledLocalContainer] at
>> java.util.concurrent.FutureTask.run(FutureTask.java:166)
>> [WARNING] [talledLocalContainer] at
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) 
>>
>> [WARNING] [talledLocalContainer] at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) 
>>
>> [WARNING] [talledLocalContainer] at 
>> java.lang.Thread.run(Thread.java:722)
>>
>> I didn't spend much time on thinking of the best way to go forward, but
>> maybe it could involve:
>> 1. Consider supporting a range of revisions of SLF?
>> 2. Consider changing the scope of the slf4j-jdk14 to provided?
>>
>> Cheers!
>>
>>
>> Tim
>>
>> On 07/06/2012 9:19 AM, Nick Cross wrote:
>>>
>>> Hi,
>>>
>>> Thanks for letting us know it works :-)
>>>
>>> Can you clarify your statement about slf4j please? According to
>>> http://www.slf4j.org/manual.html, slf4j-jdk14-1.6.5.jar (the most
>>> recent release) is the binding for java.util.logging.
>>>
>>> Regards
>>>
>>> Nick
>>>
>>>
>>>
>>> On 07/06/12 12:45, Timothy Astle wrote:
>>>> In case there is any doubt, it works fine for me. You just have to
>>>> declare the following if you need the IDL compiler and JacORB itself.
>>>>
>>>> <!-- JACORB and related dependencies. -->
>>>> <dependency>
>>>> <groupId>org.jacorb</groupId>
>>>> <artifactId>jacorb</artifactId>
>>>> <version>3.0</version>
>>>> </dependency>
>>>> <dependency>
>>>> <groupId>org.jacorb</groupId>
>>>> <artifactId>idl-compiler</artifactId>
>>>> <version>3.0</version>
>>>> </dependency>
>>>>
>>>> btw, kudos to the JacORB team for the dependency clean-up in version
>>>> 3.0. Nice to get rid of avalon logging :)
>>>>
>>>> The only warning I would give to people is that if they've already
>>>> brought in SLF4J for a more recent version of Java (5,6,7), the
>>>> jacorb-parent POM has a dependency on slf4j-jdk14. You must override
>>>> this transitive dependency to avoid class loader issues (i.e., Java or
>>>> your servlet container may load wrong class.) Don't worry though, you
>>>> should get a pretty clear error.
>>>>
>>>> I hope this helps,
>>>>
>>>> Tim
>>>>
>>>> On 07/06/2012 7:52 AM, Nick Cross wrote:
>>>>>
>>>>> Try using maven central e.g.
>>>>>
>>>>> "http://search.maven.org/#browse|-1539331823" or a mirror e.g.
>>>>> http://mirrors.ibiblio.org/pub/mirrors/maven2/org/jacorb/
>>>>>
>>>>> I am not familiar with mvnrepository.com - is it an official mirror?
>>>>>
>>>>>
>>>>> Regards
>>>>>
>>>>> Nick
>>>>>
>>>>> On 07/06/12 11:43, Lulseged Zerfu wrote:
>>>>>> Hi
>>>>>>
>>>>>> I am looking jacORB from the www.mvnrepository.com. I don't know it
>>>>>> it is where I should look jacORB from.
>>>>>>
>>>>>> http://mvnrepository.com/search.html?query=jacorb
>>>>>>
>>>>>> This query shows me that the core is there but not the idl-compiler.
>>>>>>
>>>>>> Or do you have another repository?
>>>>>>
>>>>>> Lulseged
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Nick Cross [mailto:jacorb at goots.org]
>>>>>> Sent: den 7 juni 2012 12:39
>>>>>> To: Discussions concerning CORBA development with JacORB
>>>>>> Cc: Lulseged Zerfu
>>>>>> Subject: Re: [jacorb-developer] JacORb in maven repository
>>>>>>
>>>>>>
>>>>>> What have you tried looking at ? i.e. show me the central repository
>>>>>> path / poms you have used?
>>>>>>
>>>>>> I have just checked and parent/idl-compiler/core and services are 
>>>>>> all
>>>>>> there.
>>>>>>
>>>>>> Core is all you need for the core orb.
>>>>>>
>>>>>> Regards
>>>>>>
>>>>>> Nick
>>>>>>
>>>>>> On 07/06/12 08:36, Lulseged Zerfu wrote:
>>>>>>> Hi
>>>>>>>
>>>>>>> On the 23:rd of May, jacORB was announced to be available in maven
>>>>>>> repositories.
>>>>>>>
>>>>>>> I can only see jacORB::Core but is this all we need to run jacORB?
>>>>>>>
>>>>>>> Where is the jacORB::idl and other dependencies?
>>>>>>>
>>>>>>> Lulseged
>>>>>>> _______________________________________________
>>>>>>> jacorb-developer maillist -
>>>>>>> jacorb-developer at lists.spline.inf.fu-berlin.de
>>>>>>> https://lists.spline.inf.fu-berlin.de/mailman/listinfo/jacorb-develope 
>>>>>>>
>>>>>>>
>>>>>>> r
>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> jacorb-developer maillist -
>>>>> jacorb-developer at lists.spline.inf.fu-berlin.de
>>>>> https://lists.spline.inf.fu-berlin.de/mailman/listinfo/jacorb-developer 
>>>>>
>>>>
>>>
>>
>> -- 
>> Timothy Astle, BCS
>> Web Development Manager
>>
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>

-- 
Timothy Astle, BCS
Web Development Manager

*CARIS* <http://www.caris.com>
115 Waggoners Lane
Fredericton, New Brunswick
Canada    E3B 2L4
Tel: +1.506.458.8533     Fax: +1.506.459.3849
www.caris.com <http://www.caris.com>

*Join us for CARIS 2012 — Exploration and Discovery*
June 25–28, 2012, Vancouver, British Columbia, Canada
Visit www.caris.com/caris2012 <http://www.caris.com/caris2012> for 
details today

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Twitter <http://www.twitter.com/CARIS_GIS> | LinkedIn 
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_________________________________________________________________________
This email and any files transmitted with it are confidential and 
intended only for the addressee(s). If you are not the intended 
recipient(s) please notify us by email reply. You should not use, 
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Any views or opinions expressed in this email are solely those of the 
author and do not necessarily represent those of the company. No binding 
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