It's OK if a library uses SLF4J properly. However, some libraries (even Apache ones) uses SLF4J improperly by having a mandatory dependency on a specific implementation (logj4 1 or logback) in their project. Such as Zookeeper:
https://repo1.maven.org/maven2/org/apache/zookeeper/zookeeper/3.4.6/zookeeper-3.4.6.pom This is very unfortunately since Zookeeper is a dependency for quite a lot of other projects, and causes quite a lot of headache if you want to use Log4j 2 (you have to exclude dependencies). There is an old JIRA ticket for it, but it has not been prioritized: https://issues.apache.org/jira/browse/ZOOKEEPER-1371 On Sat, Aug 15, 2015 at 2:27 AM, Ralph Goers <ralph.go...@dslextreme.com> wrote: > Gary, > > Do you have something in mind? While not hard, it is a fair amount of > work for an application to switch to a different logging API. Granted, it > is mostly just changing the call to get a Logger. But most applications > should also take advantage of the new parameter syntax as well. > > What was your experience with projects upgrading to commons lang3 vs > commons lang? I know quite a few people are still using commons httpclient > vs the new version, and that has been around a lot longer than Log4j 2. > What I really hope is that we stopped projects from switching from log4j 1 > to logback, although I am aware that many projects are using slf4j instead > and letting their customers choose. Frankly, if I hadn’t found limitations > (such as the ability to use Messages) in SLF4J I would have used that as > the API for Log4j 2 (I am quite happy we didn’t). > > Ralph > > On Aug 14, 2015, at 2:34 PM, Gary Gregory <garydgreg...@gmail.com> wrote: > > Something to think about after we get 2.4 out the door... > > Do you think it appropriate for us to do some kind of outreach to other > Apache projects and say "hey, about about use log4j 2?" > > Gary > > -- > E-Mail: garydgreg...@gmail.com | ggreg...@apache.org > Java Persistence with Hibernate, Second Edition > <http://www.manning.com/bauer3/> > JUnit in Action, Second Edition <http://www.manning.com/tahchiev/> > Spring Batch in Action <http://www.manning.com/templier/> > Blog: http://garygregory.wordpress.com > Home: http://garygregory.com/ > Tweet! http://twitter.com/GaryGregory > > > -- [image: MagineTV] *Mikael Ståldal* Senior backend developer *Magine TV* mikael.stal...@magine.com Regeringsgatan 25 | 111 53 Stockholm, Sweden | www.magine.com Privileged and/or Confidential Information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such a person), you may not copy or deliver this message to anyone. In such case, you should destroy this message and kindly notify the sender by reply email.
