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From "Cindy Wong" <cw...@pu-gong-ying.info>
Subject Re: Why There isn't a Log File?
Date Wed, 30 Mar 2011 17:15:05 GMT
To answer my own question, according to Tomcat document, the problem is
with TC. I need to use the property configuration file format instead.


> I have used log4j before with the property file configuration. For this
> new project, I have the XML configuration. The console output seems to be
> fine. Any changes on log level and layout will reflect on log messages on
> the console right away.
>
> I, however, can't get any log file for some reasons. To my understanding,
> to use a log file, I need to use the
> log4j-user-subscribe@logging.apache.org class and what is the name is
> important.
>
> The followings are the xml configuration and the dtd. Can someone tell me
> what is wrong?
>
> <?xml version="1.0" encoding="UTF-8"?>
> <!-- <!DOCTYPE log4j:configuration PUBLIC "-//LOGGER" "log4j.dtd"> -->
> <!DOCTYPE log4j:configuration PUBLIC "-//log4j/log4j Configuration//EN"
> "log4j.dtd">
> <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
> <!-- <log4j:configuration debug="true">  -->
> 	<!-- Appenders -->
> 	<appender name="console" class="org.apache.log4j.ConsoleAppender">
> 		<param name="Target" value="System.out" />
> 		<layout class="org.apache.log4j.PatternLayout">
> 			<param name="ConversionPattern" value="%-5p: %c{1}:%L - %m%n" />
> 		</layout>
> 	</appender>
>
>     <appender name="file" class="org.apache.log4j.RollingFileAppender">
> 		<param name="maxFileSize" value="100KB" />
> 		<param name="maxBackupIndex" value="5" />
>         <param name="File" value="c:\myproj\myapp\logs\mylog.log" />
>         <param name="Append" value="true" />
>         <layout class="org.apache.log4j.PatternLayout">
>        		<param name="ConversionPattern" value="%d %-5p [%t] %C{2} (%F:%L)
> - %m%n"/>
>         </layout>
>     </appender>
>
> 	<!-- Application Loggers -->
> 	<logger name="com.mycom.myapp">
> 		<level value="debug" />
> 	</logger>
>
> 	<!-- 3rdparty Loggers -->
> ...
>
> 	<!-- Root Logger -->
> 	<root>
> 		<priority value="warn" />
> 		<appender-ref ref="console" />
> 	</root>
>
> </log4j:configuration>
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> <?xml version="1.0" encoding="UTF-8" ?>
>
> <!-- A configuration element consists of optional renderer
> elements,appender elements, categories and an optional root
> element. -->
>
> <!ELEMENT log4j:configuration (renderer*,
> appender*,(category|logger)*,root?,
>                                categoryFactory?)>
>
> <!-- The "threshold" attribute takes a level value such that all -->
> <!-- logging statements with a level equal or below this value are -->
> <!-- disabled. -->
>
> <!-- Setting the "debug" enable the printing of internal log4j logging
> -->
> <!-- statements.
> -->
>
> <!-- By default, debug attribute is "null", meaning that we not do touch
> -->
> <!-- internal log4j logging settings. The "null" value for the threshold
> -->
> <!-- attribute can be misleading. The threshold field of a repository	 -->
> <!-- cannot be set to null. The "null" value for the threshold attribute
> -->
> <!-- simply means don't touch the threshold field, the threshold field
> -->
> <!-- keeps its old value.
> -->
>
> <!ATTLIST log4j:configuration
>   xmlns:log4j              CDATA #FIXED "http://jakarta.apache.org/log4j/"
>   threshold                (all|debug|info|warn|error|fatal|off|null)
> "null"
>   debug                    (true|false|null)  "null"
>>
>
> <!-- renderer elements allow the user to customize the conversion of  -->
> <!-- message objects to String.                                       -->
>
> <!ELEMENT renderer EMPTY>
> <!ATTLIST renderer
>   renderedClass  CDATA #REQUIRED
>   renderingClass CDATA #REQUIRED
>>
>
> <!-- Appenders must have a name and a class. -->
> <!-- Appenders may contain an error handler, a layout, optional parameters
> -->
> <!-- and filters. They may also reference (or include) other appenders.
> -->
> <!ELEMENT appender (errorHandler?, param*, layout?, filter*,
> appender-ref*)>
> <!ATTLIST appender
>   name 		ID 	#REQUIRED
>   class 	CDATA	#REQUIRED
>>
>
> <!ELEMENT layout (param*)>
> <!ATTLIST layout
>   class		CDATA	#REQUIRED
>>
>
> <!ELEMENT filter (param*)>
> <!ATTLIST filter
>   class		CDATA	#REQUIRED
>>
>
> <!-- ErrorHandlers can be of any class. They can admit any number of -->
> <!-- parameters. -->
>
> <!ELEMENT errorHandler (param*, root-ref?, logger-ref*,  appender-ref?)>
> <!ATTLIST errorHandler
>    class        CDATA   #REQUIRED
>>
>
> <!ELEMENT root-ref EMPTY>
>
> <!ELEMENT logger-ref EMPTY>
> <!ATTLIST logger-ref
>   ref IDREF #REQUIRED
>>
>
> <!ELEMENT param EMPTY>
> <!ATTLIST param
>   name		CDATA   #REQUIRED
>   value		CDATA	#REQUIRED
>>
>
>
> <!-- The priority class is org.apache.log4j.Level by default -->
> <!ELEMENT priority (param*)>
> <!ATTLIST priority
>   class   CDATA	#IMPLIED
>   value	  CDATA #REQUIRED
>>
>
> <!-- The level class is org.apache.log4j.Level by default -->
> <!ELEMENT level (param*)>
> <!ATTLIST level
>   class   CDATA	#IMPLIED
>   value	  CDATA #REQUIRED
>>
>
>
> <!-- If no level element is specified, then the configurator MUST not -->
> <!-- touch the level of the named category. -->
> <!ELEMENT category (param*,(priority|level)?,appender-ref*)>
> <!ATTLIST category
>   class         CDATA   #IMPLIED
>   name		CDATA	#REQUIRED
>   additivity	(true|false) "true"
>>
>
> <!-- If no level element is specified, then the configurator MUST not -->
> <!-- touch the level of the named logger. -->
> <!ELEMENT logger (level?,appender-ref*)>
> <!ATTLIST logger
>   name		ID	#REQUIRED
>   additivity	(true|false) "true"
>>
>
>
> <!ELEMENT categoryFactory (param*)>
> <!ATTLIST categoryFactory
>    class        CDATA #REQUIRED>
>
> <!ELEMENT appender-ref EMPTY>
> <!ATTLIST appender-ref
>   ref IDREF #REQUIRED
>>
>
> <!-- If no priority element is specified, then the configurator MUST not
> -->
> <!-- touch the priority of root. -->
> <!-- The root category always exists and cannot be subclassed. -->
> <!ELEMENT root (param*, (priority|level)?, appender-ref*)>
>
>
> <!-- ====================================================================
> -->
> <!--                       A logging event
> -->
> <!-- ====================================================================
> -->
> <!ELEMENT log4j:eventSet (log4j:event*)>
> <!ATTLIST log4j:eventSet
>   xmlns:log4j             CDATA #FIXED "http://jakarta.apache.org/log4j/"
>   version                (1.1|1.2) "1.2"
>   includesLocationInfo   (true|false) "true"
>>
>
>
>
> <!ELEMENT log4j:event (log4j:message, log4j:NDC?, log4j:throwable?,
>                        log4j:locationInfo?) >
>
> <!-- The timestamp format is application dependent. -->
> <!ATTLIST log4j:event
>     logger     CDATA #REQUIRED
>     level      CDATA #REQUIRED
>     thread     CDATA #REQUIRED
>     timestamp  CDATA #REQUIRED
>>
>
> <!ELEMENT log4j:message (#PCDATA)>
> <!ELEMENT log4j:NDC (#PCDATA)>
>
> <!ELEMENT log4j:throwable (#PCDATA)>
>
> <!ELEMENT log4j:locationInfo EMPTY>
> <!ATTLIST log4j:locationInfo
>   class  CDATA	#REQUIRED
>   method CDATA	#REQUIRED
>   file   CDATA	#REQUIRED
>   line   CDATA	#REQUIRED
>>
>
>
>
>
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