'''Apache Commons Logging''' (previously known as '''Jakarta Commons-Logging (JCL)''') is a [[Java platform|Java]]-based [[data logging|logging]] utility and a programming model for logging and for other toolkits. It provides APIs[[Application programming interface|API]]s, log implementations, and [[Adapter pattern|wrapper]] implemetations over some other tools.<ref name=":ac">{{Cite web|url = http://commons.apache.org/proper/commons-logging/|title = commons logging|date = |accessdate = 12 February 2016|website = Apache.org|publisher = Apache|last = |first = }}</ref><ref name=":ijcliwas_2">{{Cite book|title = Intergrating Jakarta Commons Logging with IBM WebSphere Application Server V5|last = Zavala|first = D.A.|last2 = Lau| first2 = Y.C.| publisher = IBM corporation|year = 2004|___location = |volume = |pages = 2}}</ref><ref name=":ac_c">{{Cite web|url = http://commons.apache.org/proper/commons-logging/guide.html|title = contents|date = |accessdate = 12 February 2016|website = Apache.org|publisher = Apache|last = |first = }}</ref>
== JCL log level ==
The following table defines the log levels and messages in JCL, in decreasing order of severity. The left column lists the log level designation in Jand the right column provides a brief description of each log level.
