Hi David,
I think the fundamental problem here is that global-forwards are not
available to be called from outside the server. If one considers the URL one
might use to call global-forwards, e.g.:
http://myHost/myApp/myForward
... then this will not be passed-to struts - and will instead look for a
servlet mapping matching the "myForward" pattern - and probably won't find
one.
If you look at the result of a global-forwards/forward generated by say:
<html:link forward="myForward">Forward Me!</html:link>
... e.g. where the following configures the forward in struts-config to
forward to the "myAction" action:
...
<global-forwards>
...
<forward name="myForward" path="/do/myAction" />
...
</global-forwards>
...
... then it will likely be of the form when rendered to HTML:
<a href="/do/myAction">Forward Me!</a>
... then this _will_ go through the struts servlet and be correctly mapped
to an action.
If you wanted a way of configuring a method of calling any tiles def from a
jsp then one option would be to have a generic action than can fwd to the
tiles def, e.g. define a bean and action in struts-config:
...
<form-beans>
...
<form-bean name="tilesDef"
type="org.apache.struts.action.DynaActionForm">
<form-property name="tilesDef" type="java.lang.String" />
</form-bean>
...
</form-beans>
...
...
<action-mappings>
...
<action path="/tilesDefFwd"
type="tld.domain.actions.TilesDefFwdAction"
name="tilesDef"
scope="request">
<forward
name="tiles-def-not-passed"
path="/error-tiles-def-not-passed.jsp" />
</action>
...
</action-mappings>
...
The action code would look like this (ok, error handling could be a bit
tighter(!)) but this gives the idea:
package tld.domain.actions;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletContext;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.DynaActionForm;
public final class TilesDefFwdAction extends Action {
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
String tilesDef = "";
// Get our parameter(s) from the form
DynaActionForm dynaForm = (DynaActionForm) form;
try {
tilesDef = dynaForm.get("tilesDef").toString();
} catch (Exception ex) {
// Something went wrong - send to error page
return ( mapping.findForward("tiles-def-not-passed") );
}
// Forward to tiles def
return ( new ActionForward(tilesDef,false) );
}
}
This would then allow a URL of the following format, e.g:
http://www.domain.tld/myApp/do/tilesDefFwd?tilesDef=myDef
... that would then forward to the tiles def "myDef", e.g.
<html:link page="/do/tilesDefFwd?tilesDef=myDef">Forward Me To Tiles
Def!</html:link>
Alternatively, there may already be a mechanism to do this natively in
struts - but have attached the above code as this is what I wrote when I was
getting to grips with forwards/actions/tiles-defs etc - and hopefully it
will be of some help!
Hue.
> -----Original Message-----
> From: David Holtzhouser [mailto:[EMAIL PROTECTED]
> Sent: 15 August 2003 14:57
> To: [EMAIL PROTECTED]
> Subject: Global Forwards and Tiles
>
>
> I've attached a discussion with a fellow developer
> regarding Global Forwards and Tiles. The tiles-defs
> are in xml if that makes any difference.
>
> *****************************************
> Here's the delima. I can configure a Global Forward
> that maps to my tiles definition. If I refer to this
> global forward from an Action then it finds my tile
> def. But, If I call this global forward from a jsp,
> then it craps out. But normally you can call a global
> forward from a JSP and it will work fine, as long as
> you are not using tiles defs. So, it seems like if I
> want to get from one JSP to another tiles def, then I
> have to go through a Action, which could be a
> ForwardAction. My Actions can use my global forwards,
> but my pages cannot. It's kind of weird, but I at
> least I understand what I can and can't do now.
> *****************************************
>
> So are thought is that Global ActionForwards defined
> in the <global-forwards> section of the
> struts-config.xml really don't go through the
> ActionServlet at all, or somehow skip allowing the
> ActionServlet's, RequestProcessor delegate:
>
> <controller
> processorClass="org.apache.struts.tiles.TilesRequestProcessor"/>
>
> to handle it.
>
> Can anyone provide clarification on this?
>
> Thanks
>
>
>
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