[Messaging, JMS & JBossMQ] - Re: Problem with ClassNotFoundException while trying to add
by jaikiran
I tried out a standalone application which creates a new Level and logs using that level. Everything worked fine for me. I tried uploading the sample project onto some site, but my firewall blocks those sites. So, here's the code, which is working. There are 2 java files involved. One corresponds to the new log level (MyTraceLevel.java) and other is a test file(TestMyLogLevel.java) containing the main() method. The log4j.xml is also posted here:
MyTraceLevel.java:
package org.myapp.log;
|
| import org.apache.log4j.Level;
|
| /**
| * My own {@link org.apache.log4j.Level} for logging.
| *
| * @author Jaikiran Pai
| *
| */
| public class MyTraceLevel extends Level {
|
| /**
| * Value of my trace level. This value is lesser than {@link org.apache.log4j.Priority#DEBUG_INT}
| * and higher than {@link org.apache.log4j.Level#TRACE_INT}
| */
| public static final int MY_TRACE_INT = DEBUG_INT - 10;
|
| /**
| * {@link Level} representing my log level
| */
| public static final Level MY_TRACE = new MyTraceLevel(MY_TRACE_INT,"MY_TRACE",7);
|
| /**
| * Constructor
| *
| * @param arg0
| * @param arg1
| * @param arg2
| */
| protected MyTraceLevel(int arg0, String arg1, int arg2) {
| super(arg0, arg1, arg2);
|
| }
|
| /**
| * Checks whether <code>sArg</code> is "MY_TRACE" level. If yes then returns {@link MyTraceLevel#MY_TRACE},
| * else calls {@link MyTraceLevel#toLevel(String, Level)} passing it {@link Level#DEBUG} as the defaultLevel
| *
| * @see Level#toLevel(java.lang.String)
| * @see Level#toLevel(java.lang.String, org.apache.log4j.Level)
| *
| */
| public static Level toLevel(String sArg) {
| if (sArg != null && sArg.toUpperCase().equals("MY_TRACE")) {
| return MY_TRACE;
| }
| return (Level) toLevel(sArg, Level.DEBUG);
| }
|
| /**
| * Checks whether <code>val</code> is {@link MyTraceLevel#MY_TRACE_INT}. If yes then returns {@link MyTraceLevel#MY_TRACE},
| * else calls {@link MyTraceLevel#toLevel(int, Level)} passing it {@link Level#DEBUG} as the defaultLevel
| *
| * @see Level#toLevel(int)
| * @see Level#toLevel(int, org.apache.log4j.Level)
| *
| */
| public static Level toLevel(int val) {
| if (val == MY_TRACE_INT) {
| return MY_TRACE;
| }
| return (Level) toLevel(val, Level.DEBUG);
| }
|
| /**
| * Checks whether <code>val</code> is {@link MyTraceLevel#MY_TRACE_INT}. If yes then returns {@link MyTraceLevel#MY_TRACE},
| * else calls {@link Level#toLevel(int, org.apache.log4j.Level)}
| *
| * @see Level#toLevel(int, org.apache.log4j.Level)
| */
| public static Level toLevel(int val, Level defaultLevel) {
| if (val == MY_TRACE_INT) {
| return MY_TRACE;
| }
| return Level.toLevel(val,defaultLevel);
| }
|
| /**
| * Checks whether <code>sArg</code> is "MY_TRACE" level. If yes then returns {@link MyTraceLevel#MY_TRACE},
| * else calls {@link Level#toLevel(java.lang.String, org.apache.log4j.Level)}
| *
| * @see Level#toLevel(java.lang.String, org.apache.log4j.Level)
| */
| public static Level toLevel(String sArg, Level defaultLevel) {
| if(sArg != null && sArg.toUpperCase().equals("MY_TRACE")) {
| return MY_TRACE;
| }
| return Level.toLevel(sArg,defaultLevel);
| }
|
| }
TestMyLogLevel.java
package org.myapp.core;
|
| import org.apache.log4j.Level;
| import org.apache.log4j.Logger;
| import org.myapp.log.MyTraceLevel;
|
| /**
| * Tests whether the new log level {@link org.myapp.log.MyTraceLevel#MY_TRACE} is working
| *
| * @author Jaikiran Pai
| *
| */
| public class TestMyLogLevel {
|
| /**
| * Writes a log message with {@link org.myapp.log.MyTraceLevel#MY_TRACE} and another message
| * with {@link Level#DEBUG}
| *
| * @param args
| */
| public static void main(String[] args) {
| Logger logger = Logger.getLogger(TestMyLogLevel.class.getName());
| System.out.println("Got the logger. Invoking log() method");
| logger.log(MyTraceLevel.MY_TRACE,"Did i get into the log file?");
| System.out.println("Wrote the log with my trace level");
| logger.log(Level.DEBUG ,"I am a debug message");
| System.out.println("Wrote the log with debug level");
| }
| }
log4j.xml
<?xml version="1.0" encoding="UTF-8"?>
| <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
|
| <!-- ===================================================================== -->
| <!-- -->
| <!-- Log4j Configuration -->
| <!-- -->
| <!-- ===================================================================== -->
|
| <!-- $Id: log4j.xml,v 1.13.2.8 2003/09/23 14:16:27 slaboure Exp $ -->
|
| <!--
| | For more configuration infromation and examples see the Jakarta Log4j
| | owebsite: http://jakarta.apache.org/log4j
| -->
|
| <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false">
|
| <!-- ================================= -->
| <!-- Preserve messages in a local file -->
| <!-- ================================= -->
|
| <!-- A size based rolling appender -->
| <appender name="FILE" class="org.apache.log4j.FileAppender">
| <param name="File" value="D:/log/myLogFile.log"/>
| <param name="Append" value="false"/>
|
| <layout class="org.apache.log4j.PatternLayout">
| <param name="ConversionPattern" value="%d{ISO8601} %-5p [%c] %m%n"/>
| </layout>
| </appender>
|
|
|
| <!-- ============================== -->
| <!-- Append messages to the console -->
| <!-- ============================== -->
|
| <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
| <param name="Target" value="System.out"/>
| <param name="Threshold" value="INFO"/>
|
| <layout class="org.apache.log4j.PatternLayout">
| <!-- The default pattern: Date Priority [Category] Message\n -->
| <param name="ConversionPattern" value="%d{ISO8601} %-5p [%c{1}] %m%n"/>
| </layout>
| </appender>
|
| <!-- ================ -->
| <!-- Limit categories -->
| <!-- ================ -->
|
|
| <category name="org.myapp">
| <priority value="MY_TRACE" class="org.myapp.log.MyTraceLevel" />
| <appender-ref ref="FILE"/>
| </category>
|
|
|
|
| <!-- ======================= -->
| <!-- Setup the Root category -->
| <!-- ======================= -->
|
| <root>
| <appender-ref ref="CONSOLE"/>
| </root>
|
| </log4j:configuration>
And here's the log file that got generated:
2006-07-12 13:45:40,633 MY_TRACE [org.myapp.core.TestMyLogLevel] Did i get into the log file?
| 2006-07-12 13:45:40,633 DEBUG [org.myapp.core.TestMyLogLevel] I am a debug message
See if this works for you. By the way, i used log4j-1.2.12.jar, if at all that matters.
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20 years, 2 months