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<h1>Simple Logging Facade for Java (SLF4J)</h1>
<p>The Simple Logging Facade for Java (SLF4J) serves as a simple
facade or abstraction for various logging frameworks
(e.g. java.util.logging, logback, log4j) allowing the end user to
plug in the desired logging framework at <em>deployment</em>
time. </p>
<p>Before you start using SLF4J, we highly recommend that you read
the two-page <a href="manual.html">SLF4J user manual</a>.
</p>
<p>Note that SLF4J-enabling your library implies the addition of
only a single mandatory dependency, namely <em>slf4j-api.jar</em>.
If no binding is found on the class path, then SLF4J will default to
a no-operation implementation.
</p>
<p>In case you wish to migrate your Java source files to SLF4J,
consider our <a href="migrator.html">migrator tool</a> which can
migrate your project to use the SLF4J API in just a few minutes.</p>
<p>In case an externally-maintained component you depend on uses a
logging API other than SLF4J, such as commons logging, log4j or
java.util.logging, have a look at SLF4J's binary-support for <a
href="legacy.html">legacy APIs</a>.
</p>
<h3>Projects depending on SLF4J</h3>
<p>Here is a non-exhaustive list of projects known to depend on
SLF4J, in alphabetical order:
</p>
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<ul>
<li><a href="http://activemq.apache.org/">Apache ActiveMQ</a></li>
<li><a href="http://arhiva.apache.org/">Apache Archiva</a></li>
<li><a href="http://camel.apache.org/">Apache Camel</a></li>
<li><a href="http://directory.apache.org/">Apache Directory</a></li>
<li><a href="http://mina.apache.org/ftpserver/">Apache FTPServer</a></li>
<li><a href="http://geronimo.apache.org/">Apache Geronimo</a></li>
<li><a href="http://incubator.apache.org/graffito/">Apache Graffito</a></li>
<li><a href="http://jackrabbit.apache.org/">Apache Jackrabbit</a></li>
<li><a href="http://mina.apache.org/">Apache Mina</a></li>
<li><a href="http://cwiki.apache.org/qpid/">Apache Qpid</a></li>
<li><a href="http://servicemix.apache.org/">Apache ServiceMix</a></li>
</ul>
</td>
<td valign="top">
<ul>
<li><a href="http://incubator.apache.org/sling/site/index.html">Apache Sling</a></li>
<li><a href="http://lucene.apache.org/solr/">Apache Solr</a></li>
<li><a href="http://tapestry.apache.org/">Apache Tapestry</a></li>
<li><a href="http://incubator.apache.org/wicket/">Apache Wicket</a></li>
<li><a href="http://aperture.sourceforge.net/">Aperture</a></li>
<li><a href="http://apogee.nuxeo.org/">Apogee</a></li>
<li><a href="http://www.jfrog.org/sites/artifactory/latest/">Artifactory</a></li>
<li><a href="http://docs.safehaus.org/display/ASYNCWEB/Home">AsyncWeb</a></li>
<li><a href="http://www.bitronix.be/">Bitronix</a></li>
<li><a href="http://www.dbunit.org/">DbUnit</a></li>
<li><a href="http://displaytag.sourceforge.net/11/">Display tag</a></li>
</ul>
</td>
<td valign="top">
<ul>
<li><a href="http://ehcache.org/">Ehcache</a></li>
<li><a href="http://groovy.codehaus.org/GMaven">GMaven</a></li>
<li><a href="http://www.gradle.org/">Gradle</a></li>
<li><a href="http://www.icegreen.com/greenmail/">GreenMail</a></li>
<li><a href="http://gumtree.codehaus.org/">GumTree</a></li>
<li><a href="http://www.h2database.com/">H2 Database</a></li>
<li><a href="http://ha-jdbc.sourceforge.net/">HA-JDBC</a></li>
<li><a href="http://www.hibernate.org/">Hibernate</a></li>
<li><a href="http://code.google.com/p/igenko/">Igenko</a></li>
<li><a href="http://jabsorb.org/">Jabsorb</a></li>
<li><a href="http://jetty.mortbay.org/">Jetty v6</a></li>
</ul>
</td>
</tr>
<tr>
<td valign="top">
<ul>
<li><a href="http://www.topmind.biz/html/index.php">jLynx</a></li>
<li><a href="http://code.google.com/p/jmesa/">JMesa</a></li>
<li><a href="http://www.artofsolving.com/opensource/jodconverter">JODConverter</a></li>
<li><a href="http://jtrac.info/dependencies.html">JTrac</a></li>
<li><a href="http://jwebunit.sourceforge.net/2.x/">JWebUnit 2.x</a></li>
<li><a href="http://www.jquantlib.org/index.php/Main_Page">JQuantLib</a></li>
<li><a href="http://www.liferay.com/web/guest/home">LIFERAY</a></li>
<li><a href="http://liftweb.net/">Lift</a></li>
<li><a href="http://log4jdbc.sourceforge.net">log4jdbc</a></li>
<li><a href="http://www.magnolia.info/en/magnolia.html">Magnolia</a></li>
<li><a href="http://mrcp4j.sourceforge.net/">MRCP4J</a></li>
</ul>
</td>
<td valign="top">
<ul>
<li><a href="http://www.mindquarry.com/">Mindquarry</a></li>
<li><a href="http://mugshot.org/">Mugshot</a></li>
<li><a href="http://mule.codehaus.org/display/MULE/Home">Mule</a></li>
<li><a href="http://nexus.sonatype.org/repository.html">Nexus</a></li>
<li><a href="http://www.novocode.com/naf/">Novocode</a></li>
<li><a href="http://www.unidata.ucar.edu/software/netcdf-java/">NetCDF</a></li>
<li><a href="http://code.google.com/p/openmeetings/">OpenMeetings</a></li>
<li><a href="http://www.openrdf.org/">OpenRDF</a></li>
<li><a href="http://docs.safehaus.org/display/PENROSE/Home">Penrose</a></li>
<li><a href="http://pzfilereader.sourceforge.net/">PZFileReader</a></li>
<li><a href="http://www.quartz-scheduler.org/">Quartz Scheduler</a></li>
</ul>
</td>
<td valign="top">
<ul>
<li><a href="http://www.quickfixj.org/">QuickFIX/J</a></li>
<li><a href="http://sonar.codehaus.org/">Sonar</a></li>
<li><a href="http://smsj.sourceforge.net/dependencies.html">SMSJ</a></li>
<li><a href="http://www.springframework.org/osgi">Spring-OSGi</a></li>
<li><a href="http://static.springsource.org/s2-dmserver/2.0.x/user-guide/htmlsingle/user-guide.html">SpringSource dm Server™</a></li>
<li><a href="http://streambase.com/">StreamBase</a></li>
<li><a href="http://www.timefinder.de/">TimeFinder</a></li>
<li><a href="http://www.wtfigo.org/index.html">WTFIGO</a></li>
<li><a href="http://yaslibrary.sourceforge.net/index.shtml">YASL</a></li>
<li><a href="http://xooctory.xoocode.org/">Xooctory</a></li>
<li><a href="http://xwiki.org">XWiki</a></li>
</ul>
</td>
</tr>
</table>
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