What is a Plug-in and how to use Java plug-ins with Struts?
What is a Plug-in and how to use Java plug-ins with Struts?: "Any Java class that you want to initialize when Struts application starts up and destroy when the application shuts down is a Java Plug-in. You can create a Java Plug-in by creating a Java class that implements org.apache.struts.action.Plugin interface."
