Re: Way to reload struts Action classes in WebLogic8.1

[Michael McGrady]

To expand (part question and part statement):  Suppose:

1.  We made an interface, Action, which the present Struts Action (renamed, 
say, "ActionImpl") implemented.
2.  We created a daemon ActionFactory which loaded actions from outside the 
CLASSPATH using a URLClassloader, etc., and which did not reference the 
implementation(s) but only the interface.
3.  We created a method in the main(String [] params) for the web container 
which allowed us to reload using the ActionFactory.

Wouldn't that work with very little effort?

Michael McGrady

At 10:15 PM 5/1/2004, Craig R. McClanahan wrote:
Inamdar, Anil - Cons wrote:

Hello,
Is there a way to reload Actions in Weblogic without redeploying the web
application.
No.  Java provides no way to replace a class (loaded by a particular class 
loader) with a modified version, without throwing away the entire class 
loader.  That's what normally happens when you reload a webapp.

I have the servlet reloading enabled , but weblogic doesnt seem to recognize
the changes to the Action classes and throws a ClassCastException.
So every small change I make, I have to redeploy the Web app which makes the
whole development process slow.
I don't know about Weblogic, but Sun's app servers (and Tomcat) have 
"reload" options that are *much* faster than the undeploy/redeploy cycle 
it sounds like you are using.  Check the docs.

thanks
Anil
Craig



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