Installing Sun JDK 1.6 on CentOS

Posted on by
1

CentOS doesn’t have a package for Sun JDK so it has to installed manually. It’s fairly easy but there are some steps to do that. This guide has been tested on CentOS 5.4 x64_86.

Step 1. Initial setup for building RPM
-!- Do this with a non-root user

  1. Create ~/.rpmmacros 
    • $ vim ~/.rpmmacros
%_topdir /home//rpmbuild
%_tmppath %{_topdir}/tmp
  2. Create needed folders: 
    • $ mkdir -p ~/rpmbuild/{SOURCES,SRPMS,SPECS,RPMS,tmp,BUILD}
  3. Build environment needs to be complete.

    4. … Continue reading →

Using RichFaces 3 dataScroller and dataTable -components

Posted on by
3

RichFaces provides some nice AJAX-components for Java Server Faces but the documentation and examples could be better. RichFaces has great documentation compared to some other frameworks but it could be better with adding a little bit of real world and down to earth examples. So here is one example of using RichFaces dataScroller and dataTable -components with custom CSS-styling, backingBean and JSF-page snippets using Richfaces 3.3.2.SR1 and JSF 1.2_12.… Continue reading →

Eclipse: Class file name must end with .class exception in search

Posted on by
Reply

Eclipse is nice IDE but it has it’s own problems. This time the Java Search and Open Type -search produced an error saying “Class file name must end with .class”. Very helpfull. Fortunately almost all the answers in the world can be found in the Internet and so with a quick googling the solution to this annoying problem was found on Stack Overflow.… Continue reading →

Redirect HTTP and HTTPS traffic to Tomcat’s ports

Posted on by
1

Apache Tomcat likes with default settings to listen to requests on 8080 and 8443 ports but it is more enjoyable to use the more common 80 and 443 ports for HTTP and HTTPS traffic. This way the user don’t have to put those pesky port numbers after the address. Of course you could just tell Tomcat to listen to those ports but it has some negative sides: hassle with the startup and running Tomcat as root.… Continue reading →

Keeping up with the time in Xen

Posted on by
4

A simple tip for keeping up with the time in Xen when your domU isn’t syncing the clock frequently enough and your clock is whatever. Of course you can sync your clock with ntpdate but first you need to set the domain (domU) to run its wallclock independently from Xen.

Simply say in the command line of domU:
echo 1 > /proc/sys/xen/independent_wallclock

Or if you have noclobber on:
echo 1 >!… Continue reading →