Hi all, I am in the process of upgrading from tomcat-3.3 to tomcat-5.5 and would greatly appreciate if you could let me know whether I understood tomcat-5.5's default logging correctly.
As of tomcat 5.5 Context element does not have a Logger sub-element. Logging can be configured with log4j or java.util.logging. I went with java.util.logging, which is turned on by default and uses <CATALINA_HOME>/conf/logging.properties. To be more exact Tomcat does not use java.util.logging as is but rather "will, in the default configuration, replace the default LogManager implementation with a container friendly implementation called JULI" (extract from http://tomcat.apache.org/tomcat-5.5-doc/logging.html) The following describes how the default logging (ie java.util.logging) works in tomcat-5.5 (well, it describes how I saw it working :) ): I. When using <CATALINA_HOME>/conf/logging.properties from the box (ie without any modifications) all the logging performed in the particular web app goes to the handlers defined in the .handlers clause, or in other words it gets logged into the logs/catalina.<dateStamp>.txt file and the console. In addition, all the exceptions thrown by the web app go to the 2localhost handler, ie they are logged into the localhost.<dateStamp>.log That's what <CATALINA_HOME>/conf/logging.properties has: -------------------------------------------------- handlers = 1catalina.org.apache.juli.FileHandler, ...., 2localhost.org.apache.juli.FileHandler,... .handlers = 1catalina.org.apache.juli.FileHandler, java.util.logging.ConsoleHandler .... 1catalina.org.apache.juli.FileHandler.directory = ${catalina.base}/logs 1catalina.org.apache.juli.FileHandler.prefix = catalina. .... 2localhost.org.apache.juli.FileHandler.directory = ${catalina.base}/logs 2localhost.org.apache.juli.FileHandler.prefix = localhost. -------------------------------------------------- that is what our web app has -------------------------------------------------- public class TestServlet extends HttpServlet { public void doGet(H.... { Logger logger1 = Logger.getLogger("test"); Handler[] handlers = logger1.getHandlers(); for (int i = 0; i < handlers.length; i++) { Handler handler = handlers[i]; System.out.println(handler); } System.out.println("handlers.size: " + handlers.length); logger1.info("INFO logging is successful"); throw new IllegalStateException("test exception"); } } -------------------------------------------------- once TestServlet serves HTTP GET request the result is: a) Console has the following handlers.size: 0 // result of System.out.println Nov 23, 2005 5:24:37 PM com.SSMB.TestProj.servlets.TestServlet doGet // result of logging INFO: INFO logging is successful b) catalina.2005-11-23.log has the following: Nov 23, 2005 5:24:37 PM com.SSMB.TestProj.servlets.TestServlet doGet // result of logging INFO: INFO logging is successful c) localhost.2005-11-23.log has the following java.lang.IllegalStateException: test exception // result of throwing the ISEx at com.SSMB.TestProj.servlets.TestServlet.doGet(TestServlet.java:45) II. If we want the logging performed by a particular web app and the exceptions thrown by it to go to a particular file we can modify <CATALINA_HOME>/conf/logging.properties. Let's assume that we have got a web app that runs on the /test context. That's how <CATALINA_HOME>/conf/logging.properties should be modified -------------------------------------------------- # add new handler, 6test.org.apache.juli.FileHandler, to the list handlers = 1catalina.org.apache.juli.FileH....,...,6test.org.apache.juli.FileHandler .... ## new line - 'test' logger will only log into 6test handler test.handlers=6test.org.apache.juli.FileHandler ... ## define 6test file handler - all logging done via 'test' logger ## will go to test.<dateStamp>.txt file 6test.org.apache.juli.FileHandler.level = FINE 6test.org.apache.juli.FileHandler.directory = ${catalina.base}/logs 6test.org.apache.juli.FileHandler.prefix = test. .... ## all of the exceptions coming from /test context are to be logged into 6test handler. org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/test].level = INFO org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/test].handlers = 6test.org.apache.juli.FileHandler -------------------------------------------------- once TestServlet (see its doGet method content above) serves HTTP GET request the result is: a) Console has the following [EMAIL PROTECTED] // result of System.out.println handlers.size: 1 // result of System.out.println b) test.2005-11-23.log has the following: Nov 23, 2005 6:17:21 PM com.SSMB.TestProj.servlets.TestServlet doGet // result of logging INFO: INFO logging is successful Nov 23, 2005 6:17:21 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet TestServlet threw exception // result of throwing the ISEx java.lang.IllegalStateException: test exception at com.SSMB.TestProj.servlets.TestServlet.doGet(TestServlet.java:45) Thanks a lot for reading my "tomcat5.5 default logging" novel. I'd greatly appreciate if you could give me a feedback on whether I described the tomcat5.5 logging behaviour correctly. Kind regards, Alexandre. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
