Archive for May 8th, 2010
GWT: Common Exceptions – NoClassDefFoundError
This seems to be a problem that nearly everyone hits when starting with GWT. It causes confusion because the code is error free at compile time, yet throws a java.lang.NoClassDefFoundError exception at runtime. The problem is simple to correct.
The JAR-file(s) must be in the correct directory and listed in the build path.
You’ll probably have included the required library into your build path already and that’s why you’re not getting compile time errors. The additional step that is to have the JAR-file(s) that contain the required libraries be copied to your project’s war/WEB-INF/lib directory. Note that your JAR-files must exist in the root of this directory, and not in any sub-directories.
Salesforce: Using basic email templates from Apex code
A few weeks ago I noticed a number of questions in the forums around how to use email templates from Apex classes. I Googled a few keywords and come up with very little. I then trawled the documentation but came up empty-handed. Eventually it was Eclipse that provided the knowledge required, and I thought I’d share it with the good ol’ developer community.
One part of the process is discovering that Salesforce stores all sorts of items as records in objects; some of them being email templates, user information and even Apex class bodies (scandalous). All you have to do is query them. The other major part is finding that the method you need is missing from the Apex documentation.
The Silver Lining 