If you're using OSGi, you can try out the related project pax-logging which provides log4j2 along with some bridges, though if I recall correctly, the bridges are mostly via SLF4J still. Pax logging is a rather open project, so if that's not desired, you can always send a pull request.
On 7 July 2017 at 00:49, Asma Zinneera Jabir <azinne...@gmail.com> wrote: > I went through the ServiceLoader usages and asking from what I understand. > Does this mean that on top of adding the bridge dependency in the central > logging component I also have to use the ServiceLoader in each and every > file importing commons-logging to find the LogFactoryImpl in the bridge to > overrite it? > > On Wed, Jul 5, 2017 at 10:59 PM, Ralph Goers <ralph.go...@dslextreme.com> > wrote: > > > The ServiceLoader needs special handling to work in OSGi. See > > http://blog.osgi.org/2013/02/javautilserviceloader-in-osgi.html < > > http://blog.osgi.org/2013/02/javautilserviceloader-in-osgi.html> > > > > Ralph > > > > > On Jul 5, 2017, at 10:27 AM, Matt Sicker <boa...@gmail.com> wrote: > > > > > > It's loaded via the ServiceLoader interface: > > > > > > https://github.com/apache/logging-log4j2/blob/master/ > > log4j-jcl/src/main/resources/META-INF/services/org.apache. > > commons.logging.LogFactory > > > > > > On 5 July 2017 at 03:30, Asma Zinneera Jabir <azinne...@gmail.com> > > wrote: > > > > > >> I am trying to set up log4j2 for Apache Commons Logging using the > > >> *commons-logging.properties* file in an OSGi environment. For Log4j 1 > I > > >> could use org.apache.commons.logging.Log=org.apache.commons. > > logging.impl. > > >> Log4JLogger which maps to version Log4j 1.2. I couldn't find out the > > >> implementation for log4J2. The version I am using is 2.8.2. > > >> > > >> There is a central logging component which is referred by other > > components > > >> and this component bundles other needed loggers (e.g. commons-logging, > > >> log4j/log4j2) added as dependencies. > > >> > > >> The Log4J2 documentation for Log4J Commons Logging Bridge > > >> <https://logging.apache.org/log4j/log4j-2.3/log4j-jcl/index.html> > > >> specifies > > >> that by just *adding the bridge jar along with the other Log4j 2 jars > > and > > >> the Commons Logging jar, all logging done using the Commons Logging > API > > >> will be routed to Log4*. I tried this by adding > > >> > > >> - log4j-api > > >> - log4j-core > > >> - log4j-jcl > > >> - commons-logging > > >> > > >> dependencies in the *pom.xml* of the central logging component and > > bundled > > >> with it without (and with just to check) using the > > >> *commons-logging.properties* but didn't work that way. How can I > > implement > > >> this with or without the commons-logging.properties? > > >> > > >> I debugged the commons-logging source code and found in > > >> LogFactoryImpl.java it > > >> looks for a logging implementation (L843 > > >> <https://github.com/apache/commons-logging/blob/LOGGING_ > > >> 1_2/src/main/java/org/apache/commons/logging/impl/ > > LogFactoryImpl.java#L843 > > >>> ) > > >> from a list (L162 > > >> <https://github.com/apache/commons-logging/blob/LOGGING_ > > >> 1_2/src/main/java/org/apache/commons/logging/impl/ > > LogFactoryImpl.java#L162 > > >>> ). > > >> Here since the Log4JLogger does not support Log4J2 it then sets to the > > next > > >> in line, that is JDK14Logger. Since the Log4J2 documentaiton says > adding > > >> the bridge simply maps the logs from JCL to Log4J2, what role does the > > >> bridging api play here? I noticed the LogFactoryImpl.java and > > >> Log4JLog.java in > > >> it but how does commons-logging refer to these which are in a > different > > >> package? > > >> > > >> stackoverflow question: Apache commons-logging bridge for log4j2 > > >> <https://stackoverflow.com/questions/44839779/apache- > > >> commons-logging-bridge-for-log4j2> > > >> > > > > > > > > > > > > -- > > > Matt Sicker <boa...@gmail.com> > > > > > -- Matt Sicker <boa...@gmail.com>
