Scopes of ActionMapper, ActionProxy, ActionInvocation, ActionContext objects in Struts2?

Question

Can any one please describe me when the objects of ActionMapper, ActionProxy, ActionInvocation

Answer 1

The ActionMapper is created on startup, it has a singleton scope.

The ActionContext is created by the Dispatcher in preparing an action to execute, it's ThreadLocal, and it doesn't have any scope.

When action is executing the ActionInvocation and ActionProxy are created that also don't have a scope.

You can see this on a big picture of Struts2 architecture.