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Change values in Log4j.xml using ksh script

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# 1  
Old 01-06-2011
Change values in Log4j.xml using ksh script
Hi,

I am new to UNIX and shell scripting.
I have to create a shell script(ksh) which parses log4j.xml file for a given webservice name and change the corresponding value from INFO to DEBUG or vice-versa.

My log4j.xml looks like:-

Code:
<!-- Appender WEBSERVICENAME-->
<appender name="WEBSERVICENAME" class="org.apache.log4j.DailyRollingFileAppender">
<param name="File" value="PATH_OF_LOG_FILE" />
<param name="threshold" value="DEBUG" />
<param name="DatePattern" value="'.'yyyy-MM-dd" />
<param name="Append" value="true" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d|%-5p|[%t]|%X{serviceId}|%X{requestId}|%c{1}:%L|%m%n" />
</layout>
<filter class="CLASSNAME">
<param name="values" value="WEBSERVICENAME"/>
<param name="MDC" value="serviceId"/>
</filter>
</appender>

IN above example i have to change:-

Code:
<param name="threshold" value="DEBUG" />

to
Code:
<param name="threshold" value="INFO" />

Note:- there are many weservices in the xml file for whom
Code:
<param name="threshold" value="DEBUG" />

is present in there appender. So i only want to change the value for input WEBSERVICE NAME only.

I searched some AWK examples but could not come up with one to suit my purpose.

Kindly help.
Last edited by pludi; 01-13-2011 at 06:16 AM..
# 2  
Old 01-06-2011
This will change the value from DEBUF to INFO for webservice "WEBSERVICENAME"
Code:
perl -i -lp0e 's/(?<=name="WEBSERVICENAME")(.*?)DEBUG/$1INFO/s' Log4j.xml

This User Gave Thanks to bartus11 For This Post:
gc_sw
# 3  
Old 01-13-2011
Hi Bartus,

Thank you for your post it is working.
But i have a another query.

Suppose the "WEBSERVICENAME" i am searching is not present in log4j.xml.
Then i have to create an entry as follows:-

Code:
<category name="WEBSERVICENAME">
<priority value="DEBUG"/>
<appender-ref ref="APPENDERNAME"/>
</category>

and this entry has to be inside the block whose start and end is defined by following Heading:-
Code:
<!--=====================================================-->
<!--================== Le root logger ==================-->
<!--=====================================================-->

I know how to append at the end of the line but how to do within a particular block i don;t know.

Moderator's Comments:
Mod Comment Please use code tags for listings.
Last edited by pludi; 01-13-2011 at 06:17 AM..
# 4  
Old 01-17-2011
Hi Bratus,

Your command is working but I get WEBSERVICE name as input and when i use a variable in your command it doesnot work.

I am trying to use

perl -i -lp0e 's/(?<=name="$CLASS_NAME")(.*?)DEBUG/$1INFO/s' log4j.xml

where CLASS_NAME has the input class name.
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