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Tomcat example source code file (

This example Tomcat source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

d, e, log, log_level_debug, log_level_debug, log_level_error, log_level_fatal, log_level_info, log_level_trace, log_level_trace, log_level_warn, logging, string, string, stringbuffer, stringbuffer

The Tomcat source code

 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.juli;

import java.util.logging.Formatter;
import java.util.logging.LogRecord;

 * A more compact formatter. 
 * Equivalent log4j config:
 *   <pre>
 *  log4j.rootCategory=WARN, A1   
 *  log4j.appender.A1=org.apache.log4j.ConsoleAppender
 *  log4j.appender.A1.layout=org.apache.log4j.PatternLayout
 *  log4j.appender.A1.Target=System.err
 *  log4j.appender.A1.layout.ConversionPattern=%r %-15.15c{2} %-1.1p %m %n
 *  </pre>
 * Example:
 *  1130122891846 Http11BaseProtocol I Initializing Coyote HTTP/1.1 on http-8800
 * @author Costin Manolache
public class JdkLoggerFormatter extends Formatter {
    // values from JDK Level
    public static final int LOG_LEVEL_TRACE  = 400;
    public static final int LOG_LEVEL_DEBUG  = 500;
    public static final int LOG_LEVEL_INFO   = 800;
    public static final int LOG_LEVEL_WARN   = 900;
    public static final int LOG_LEVEL_ERROR  = 1000;
    public static final int LOG_LEVEL_FATAL  = 1000;

    public String format(LogRecord record) {
        Throwable t=record.getThrown();
        int level=record.getLevel().intValue();
        String name=record.getLoggerName();
        long time=record.getMillis();
        String message=formatMessage(record);

        if( name.indexOf(".") >= 0 ) 
            name = name.substring(name.lastIndexOf(".") + 1);

        // Use a string buffer for better performance
        StringBuffer buf = new StringBuffer();
        buf.append(" ");
        // pad to 8 to make it more readable 
        for( int i=0; i<8-buf.length(); i++ ) { buf.append(" "); }
        //      Append a readable representation of the log level.
        switch(level) {
         case LOG_LEVEL_TRACE: buf.append(" T "); break;
         case LOG_LEVEL_DEBUG: buf.append(" D "); break;
         case LOG_LEVEL_INFO:  buf.append(" I ");  break;
         case LOG_LEVEL_WARN:  buf.append(" W ");  break;
         case LOG_LEVEL_ERROR: buf.append(" E "); break;
         //case : buf.append(" F "); break;
         default: buf.append("   ");

        // Append the name of the log instance if so configured
        // pad to 20 chars 
        for( int i=0; i<8-buf.length(); i++ ) { buf.append(" "); }
        // Append the message
        // Append stack trace if not null
        if(t != null) {
            buf.append(" \n");
   sw= new;
   pw= new;
        // Print to the appropriate destination
        return buf.toString();

Other Tomcat examples (source code examples)

Here is a short list of links related to this Tomcat source code file:

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