Sep 172007
 

I’m spent about 6 hours total working on getting multiple instance of Tomcat to run on Ubuntu and finally wrote some scripts that I’d like to share with folks. These scripts do the following:

1. Setup the box to host multiple instances (JVMs) running tomcat

This process cleans the old layout and sets up a new layout that allows for multiple instances. This includes a number of “instances” directories in /var/lib/tomcat5.5, /etc/defaults/tomat5.5 (a new directory) and /var/log/tomcat5.5.

2. Create new instances

This allows you to setup a new instance quickly. It creates all the necessary directories and also installs the new instance into the init scripts an run levels.

Things the scripts don’t do:

– Setup multiple mod_jk configurations and apache virtual hosts
– Any SSL or security management

Here’s how to use the scripts:

1. First make sure you have Java and Tomcat installed!

2. Grab ALL of the scripts and place them in some directory (anywhere is fine)

3. Run the multiple-instances.sh script as root from the directory you put it in

4. Run the new-instance.sh script to create a new instance

5. Configure the new server by editing the files in /var/lib/tomcat5.5/instances/<instance-name> (mainly conf/server.xml)

6. Make sure each instance has a unique port for everything including the AJP, all listeners and the container

7. Fire it up!

8. Check the logs in /var/log/tomcat5.5/instances/<instance-name>/catalina.out

Due to security considerations, I’ve included the scripts inline. Any comments are welcome:

multiple-instances.sh

new-instance.sh

tomcat.sh

Sep 122007
 

I was just having a ton of issues getting JQuery and TinyMCE to work. Sometimes loading of TinyMCE would hang and never complete and other times I would lose my tinyMCE or jQuery objects for some reason. Well, I’m not sure what the error was, but I finally got it working. It seems that you first need to completely load and initialize TinyMCE before loading JQuery. Here’s my code:

This seems to work and allow me to do everything AJAX style and use TinyMCE editors in my AJAX forms (i.e. forms that I download the HTML for and that I submit via AJAX). Here’s a simple form snippet that is downloaded via AJAX and placed into a div: