Update: Due to the loss of dropbox, the links to dropbox offline project are no longer active. Please use this awesome document as your new reference:
This tutorial can be viewed in its entirety on my web site:
The first thing we need to do is find out what version of Java is our server running, this way we know which version of Java to compile in.
This document outlines the JRE (Java Runtime Environment) version compatibility with all versions of CRS:
"Cisco Customer Response Solutions (CRS) Software and Hardware Compatibility Guide" - June 16, 2008
According to that document, my version of CRS, v5.0(1) SR2, uses JRE 1.5.0. So I will go to Sun's site and download the JDK (Java Development Kit) for that version.
Alternatively, you could determine the Java version right on the CRS server itself. Though, there could be multiple JRE's installed, and the CRS Engine uses only the one listed in the above document.
Sun's page for previous JDK versions:
I would typically install the JDK and JRE for 1.5.0 on my personal computer and not on the server. This way I can do all of my Java testing offline, making sure it all works, before even uploading it to the server. I did one additional, and optional, thing to make developing easier. I added the bin directory to my path variable so I can execute the necessary Java commands from any directory. This is outlined in the installation instructions, which can be found on the JDK download page.
So now we have our development environment setup. Yep, all we needed was the JDK, and the JRE, the only other tool we'll use it already on every system; a text editor. I will use TextEdit on my Mac for this example, but you could easily use Notepad on Windows, or nano on Linux.
I will not get into the details of writing Java apps/classes, so for the purpose of this tutorial I will offer my simple SOAP class to you.
Disclaimer: I am not a Java programmer. In fact, this is my very first program in Java, and I learned just enough for this task.
Now, we need to compile our source code into byte code so the JRE can execute it. Compiling the .java file will result in a new file of the same name, but with the .class extension on it.
http://www.avholloway.com/vtools/ipcc/custom-java/soap/compiling-SimpleSOAP.png - Command Prompt>javac SimpleSOAP.java
Now we need to test this new class to see if it works before we add the complexity of the CRS environment.
Let's create another Java file, and this one will utilize our newly created class.
Now we compile that source code so it can also be ran.
http://www.avholloway.com/vtools/ipcc/custom-java/soap/compiling-RunMyCode.png - Command Prompt>javac RunMyCode.java
Next we pass the RunMyCode class to the JRE like so (Note the absence of the .class or .java file extension):
http://www.avholloway.com/vtools/ipcc/custom-java/soap/running-RunMyCode.png - Command Prompt>java RunMyCode
Your output should look something similar to this:
OK, so if everything is working up to this point, it's safe to assume that our CRS server will be able to utilize our class as well.