[hibernate-dev] [infinispan-dev] Possible error of dependency on infinispan-query pom

Hardy Ferentschik hibernate at ferentschik.de
Wed Jul 14 07:20:58 EDT 2010 

Hi,

Seems the solution is to upgrade to slf4j 1.6.0 -  
http://bugzilla.slf4j.org/show_bug.cgi?id=159
In 1.6.0 no exception is thrown when there is just the api jar and no  
binding jar.

Btw, Hibernate Core also uses slf4j and there was a major discussion  
around this which lead
in the end to the creation of the slf4j issue.

--Hardy

On Wed, 14 Jul 2010 13:01:55 +0200, Galder Zamarreño <galder at jboss.org>  
wrote:

> Right, but that means that your app does not work out of the box because  
> logging has not been determined. This is silly IMO.
>
> I'm glad Infinispan itself does not use slf4j.
>
> I'll add an faq on this
>
> On Jul 14, 2010, at 11:13 AM, Hardy Ferentschik wrote:
>
>> That's right. Hibernate Search only defines a dependency to the slf4j  
>> api.
>> The slf4j-log4j dependency, because we use log4j logging in our tests,  
>> but
>> the
>> whole idea of slf4j is to give the user the choice of which logging
>> framework to use.
>>
>> On Wed, 14 Jul 2010 11:02:46 +0200, Emmanuel Bernard
>> <emmanuel at hibernate.org> wrote:
>>
>>> I believe that's the proper way.
>>> We do have a dependency on slf4j the API / facade.
>>> Then a user needs to decide which underlying implementation it wants to
>>> use. To do that he embeds the right binder (eg slf4j-log4j). If you
>>> force slf4j-log4j in HSearch dependencies, you force choice to people.
>>> They have to either exclude it manually, deal with it or worse log  
>>> where
>>> they don't expect to log.
>>>
>>> I think Ceki has been thinking about using the JDK logging mechanism if
>>> no binder is present in the classpath. I don't know if / when that will
>>> make it through.
>>>
>>>
>>> <para>Hibernate Search utilizes <ulink
>>>    url="http://www.slf4j.org/">Simple Logging Facade for Java</ulink>
>>> (SLF4J)
>>>    in order to log various system events. SLF4J can direct your logging
>>>    output to several logging frameworks (NOP, Simple, log4j version
>>> 1.2, JDK
>>>    1.4 logging, JCL or logback) depending on your chosen binding. In
>>> order to
>>>    setup logging properly you will need
>>> <filename>slf4j-api.jar</filename> in
>>>    your classpath together with the jar file for your preferred binding
>>> -
>>>    <filename>slf4j-log4j12.jar</filename> in the case of Log4J. See the
>>> SLF4J
>>>    <ulink type=""
>>>    url="http://www.slf4j.org/manual.html">documentation</ulink> for  
>>> more
>>>    detail.</para>
>>>
>>> On 14 juil. 2010, at 08:10, Galder Zamarreño wrote:
>>>
>>>> Hmmm, these looks like a problem in Hibernate Search since they're the
>>>> ones using slf4j.
>>>>
>>>> I don't see why Infinispan Query should explicitly declare a  
>>>> dependency
>>>> on slf4j.
>>>>
>>>> Emmanuel, wdyt?
>>>>
>>>> http://anonsvn.jboss.org/repos/hibernate/search/tags/v3_2_0_Final/hibernate-search/src/main/java/org/hibernate/search/util/LoggerFactory.java
>>>> needs slf4j, so it would appear to me that Hibernate Search should
>>>> define dependencies on slf4j and not query module.
>>>>
>>>> I see
>>>> https://repository.jboss.org/nexus/content/groups/developer/org/hibernate/hibernate-search-parent/3.2.0.Final/hibernate-search-parent-3.2.0.Final.pom
>>>> having the same stuff query has, a dependency on slf4j-log4j with test
>>>> scope.
>>>>
>>>> On Jul 14, 2010, at 1:01 AM, Israel Lacerra wrote:
>>>>
>>>>> Hi everybody,
>>>>>
>>>>> I'm making some tests and I am using infinispan-gui-demo. So I have
>>>>> to  include "infispan-query" as a dependency in infinispan-gui-demo.
>>>>> After this, and including my code that make some use of  
>>>>> infispan-query
>>>>> module,  I get this when I start the cache:
>>>>>
>>>>> Exception in thread "pool-1-thread-1" java.lang.NoClassDefFoundError:
>>>>> org/slf4j/impl/StaticLoggerBinder
>>>>>   at org.slf4j.LoggerFactory.getSingleton(LoggerFactory.java:223)
>>>>>   at org.slf4j.LoggerFactory.bind(LoggerFactory.java:120)
>>>>>   at
>>>>> org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:111)
>>>>>   at  
>>>>> org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:269)
>>>>>   at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:242)
>>>>>   at
>>>>> org.hibernate.search.util.LoggerFactory.make(LoggerFactory.java:38)
>>>>>   at org.hibernate.search.Version.<clinit>(Version.java:40)
>>>>>   at
>>>>> org.hibernate.search.impl.SearchFactoryImpl.<clinit>(SearchFactoryImpl.java:102)
>>>>>   at
>>>>> org.infinispan.query.backend.QueryHelper.<init>(QueryHelper.java:104)
>>>>>   at
>>>>> org.infinispan.demo.InfinispanDemo$10.run(InfinispanDemo.java:377)
>>>>>   at
>>>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>>>>>   at
>>>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>>>>>   at java.lang.Thread.run(Thread.java:619)
>>>>> Caused by: java.lang.ClassNotFoundException:
>>>>> org.slf4j.impl.StaticLoggerBinder
>>>>>   at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>>>>>   at java.security.AccessController.doPrivileged(Native Method)
>>>>>   at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>>>>>   at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
>>>>>   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>>>>>   at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
>>>>>   ... 13 more
>>>>>
>>>>>
>>>>> If I change the scope of slf4j-log4j12 to default scope in
>>>>> infinispan-query's pom, the problem disappears.
>>>>>
>>>>> Probably I miss something on the maven behaviour or something like  
>>>>> it.
>>>>> But maybe the scope is incorrect.
>>>>>
>>>>>
>>>>> thanks!
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> infinispan-dev mailing list
>>>>> infinispan-dev at lists.jboss.org
>>>>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>>>>
>>>> --
>>>> Galder Zamarreño
>>>> Sr. Software Engineer
>>>> Infinispan, JBoss Cache
>>>>
>>>>
>>>> _______________________________________________
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>>>> infinispan-dev at lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>>>
>>>
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>>> https://lists.jboss.org/mailman/listinfo/hibernate-dev
>>
>> _______________________________________________
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>> infinispan-dev at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>
> --
> Galder Zamarreño
> Sr. Software Engineer
> Infinispan, JBoss Cache
>
>
> _______________________________________________
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