retrieve the HttpServletRequest on an Axis server object

MessageContext context = org.apache.axis.MessageContext.getCurrentContext();
request = (HttpServletRequest)context.getProperty(
               org.apache.axis.transport.http.
               HTTPConstants.MC_HTTP_SERVLETREQUEST);

debug the network activity of a process on Windows

find the process (service) id with

tasklist /SVC

then type

netstat -aovn | findstr <processid>

where <processid> is the process id found by tasklist.

rsync

how to sync (in simulation mode) the folder myRootPackage under /http/www/myWebapp/WEB-INF/classes on the host "hostname", in the folder /http/lib/myWebapp/WEB-INF/classes/ on the local host

rsync --rsh="/usr/bin/ssh -l username" -avzn --size-only
hostname:/http/www/myWebapp/WEB-INF/classes/myRootPackage 
/http/lib/myWebapp/WEB-INF/classes/

tar gz

to create a tar.gz file

tar -czvf archive.tgz directory --exclude "file"

to extract a tar.gz file

tar xvzf file.tar.gz
 

on Solaris:

tar cf tomcat7.tar /tomcat7 | gzip -f tomcat7.tar

log swallowing on Tomcat

In order to split the catalina.out across multiple files, each one of which created every day, it's useful to configure the context xml descriptor as below (tested on Tomcat 5.0.28)

/usr/local/tomcat/conf/Catalina/localhost/myApp.xml

<context path="/myWebApp" swallowOutput="true">
<logger directory="logs"
      className="org.apache.catalina.logger.FileLogger"
      prefix="myApp_log."
      suffix=".txt"
      timestamp="true"/>
</Context>

which will create every day a new file called
myApp_log.YYYY-MM-DD.txt
containing the daily ouput

This technique is referred to as "output swallowing" on Tomcat
(note the swallowOutput="true")

Datawarehouse

articles on Datawarehouse
read

What's blocking my lock?

Here comes an extremely clear and interesting article, written by Natalka Roshalk, about Oracle locks and how to monitor what's going on when a lock is blocking a session

read the article