From autoplot.org

Purpose: Notes regarding servlet development.

Audience: Autoplot developers working on performance and reliability of the servlet.

1. debugging

The servlet can be run within Netbeans using the debugger.

For the SimpleServlet, requestId can be an integer, and log information will be dumped into "/tmp/testservlet/log" + requestId + ".txt"

2. caching

Firefox seems to cache the results nicely. This method can also be used to add server-side caching of images.