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

Emmanuel, I've created https://jira.jboss.org/browse/ISPN-541 to revisit current query module dependencies when Hibernate Search upgrades to SLF4J 1.6. If you create a jira for that, let me know so that I can keep track of it and find out when an updated HBS is released. Cheers, On Jul 14, 2010, at 2:23 PM, Ceki Gülcü wrote: > On 14/07/2010 1:41 PM, Steve Ebersole wrote: >> Ah we are using 1.5.8 currently. We should upgrade to 1.6 then. > > Yes, you should upgrade to 1.6.0. > > You should also be aware that slf4j-api 1.6. will *not* work with > bindings from the 1.5 series. So, if the next version of hibernate, > say 3.5.4 uses SLF4J version 1.6, when an end-user upgrades to > Hibernate 3.5.4, she will also need to update her SLF4J binding to > version 1.6 as well. For example, if the user has > slf4j-log4j-1.5.8.jar on the class path and upgrades to Hibernate > 3.5.4, she will need to replace slf4j-log4j12-1.5.8.jar with > slf4j-log4j12-1.6.jar. > > Now, if the user forgets to update the binding for log4j, then when > SLF4J initializes, the version mismatch issue will be *automatically* > detected and SLF4J will duly warn the user by emitting a message on > the console. > > I would expect even a half-alert developer to successfully deal with > this issue within 10 minutes after upgrading. However, I have to admit > that some minimal amount of alertness of the part of the developer is > required. The upgrade process to SLF4J 1.6 is unfortunately not > totally transparent. > > Note that the api and bindings in the 1.6 series are planned to be all > mutually compatible. The version mismatch issue only occurs when > upgrading SFL4J from the 1.5.x series to the 1.6.x series. > > HTH, > >> 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 >>> > _______________________________________________ > hibernate-dev mailing list > hibernate-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/hibernate-dev -- Galder Zamarreño Sr. Software Engineer Infinispan, JBoss Cache _______________________________________________ hibernate-dev mailing list hibernate-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/hibernate-dev