[hibernate-dev] [infinispan-dev] Possible error of dependency on infinispan-query pom
Steve Ebersole
steve at hibernate.org
Wed Jul 14 07:41:03 EDT 2010
Ah we are using 1.5.8 currently. We should upgrade to 1.6 then.
On Wed, 2010-07-14 at 13:24 +0200, Ceki Gülcü wrote:
>
> 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.
> >
>
> Hello Galder,
>
> The issue reported by Israel Lacerra, that is the NoClassDefFoundError
> for org.slf4j.impl.StaticLoggerBinder, no longer occurs in SLF4J 1.6
> and later. Upgrading to SLF4J v1.6 will cause the problem to
> disappear.
>
> Quoting the SLF4J manual [1]:
>
> Libraries
>
> Authors of widely-distributed components and libraries may code
> against the SLF4J interface in order to avoid imposing an logging
> framework on the end-user of the component or library. He or she may
> choose the desired logging framework at deployment time by inserting
> the desired slf4j binding on the classpath, which may be changed later
> by replacing an existing binding with another on the class path and
> restarting the application. This approach has proven to be simple and
> very robust.
>
> As of SLF4J version 1.6.0, if no binding is found on the class path,
> then slf4j-api will default to a no-operation implementation
> discarding all log requests. Thus, instead of throwing an exception,
> SLF4J will emit a single warning message about the absence of a
> binding and proceed to discard all log requests without further
> protest. For example, let Wombat be some biology-related framework
> depending on SLF4J for logging. In order to avoid imposing a logging
> framework on the end-user, Wombat's distribution includes
> slf4j-api.jar but no binding. Even in the absence of any SLF4J binding
> on the class path, Wombat's distribution will still work
> out-of-the-box, and without requiring the end-user to download a
> binding from SLF4J's web-site. Only when the end-user wishes to enable
> logging will she need to install a binding.
>
> I hope this sheds lights onto the matter,
>
> --
> Ceki
>
> [1] http://slf4j.org/manual.html#libraries
>
>
>
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--
Steve Ebersole <steve at hibernate.org>
http://hibernate.org
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