How can I tell why a servlet filter has been invoked.

Question

In the servlet 2.4 spec you can define dispatchers in the filter config [REQUEST | FORWARD | ERROR | INCLUDE].

When the filter is invoked, how can I tell from which condition it was invoked from i.e. how can I tell if it was a request or an include or a forward?

Answer 1

The "javax.servlet.*" request attributes contain information about the conditions that led to the filter being invoked.