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Posted to user@struts.apache.org by To...@aol.com on 2003/06/24 12:22:17 UTC

Best practices - help

Is there a way to populate a bean  on a Server's (I'm using Tomcat) start up 
in Struts?

I have a Java bean, say X, which is called and a populated in an Action 
Servlet, say myAction. Whenever I start my application and call a JSP layer say, 
MyLayer.jsp,  which is supposed to iterate this bean using <logic:iterate>, 

I get the exception: 
org.apache.jasper.JasperException: Cannot find bean X in scope session
-----
-----

However, this exception disappears when I first call the Action Servlet 
directly with a call such as http://localhost/myaction.do , followed by a 
http://localhost/MyLayer.jsp call.

Apparently the bean has nothing to show when I first call MyLayer.jsp.

Can someone suggest a better approach?

Thanks

Bob

Ps.: the bean, X, get its values from a database. 

my struts-config.xml snippet :

---
--

      <global-forwards>
        <forward name="books" path="/MyLayer.jsp"/>
         -------
         -------
    </global-forwards>
    <action-mappings>
        <action path="/myaction"
            type="com.myController.myAction"

            scope="session"
            >
            <forward name="books" path="/MyLayer.jsp"/>
        </action>

    </action-mappings>
----

RE: Best practices - help

Posted by Steve Raeburn <st...@ninsky.com>.
You should not access the JSP directly. Always send requests to the Action
which will return an ActionForward to the JSP. In your example you should
always be accessing /myaction.do and never /MyLayer.jsp

You seem to have it set up OK, but there's no need for your global forward
to the JSP.

Steve

> -----Original Message-----
> From: TopBid987654321@aol.com [mailto:TopBid987654321@aol.com]
> Sent: June 24, 2003 3:22 AM
> To: struts-user@jakarta.apache.org
> Subject: Best practices - help
>
>
> Is there a way to populate a bean  on a Server's (I'm using
> Tomcat) start up
> in Struts?
>
> I have a Java bean, say X, which is called and a populated in an Action
> Servlet, say myAction. Whenever I start my application and call a
> JSP layer say,
> MyLayer.jsp,  which is supposed to iterate this bean using
> <logic:iterate>,
>
> I get the exception:
> org.apache.jasper.JasperException: Cannot find bean X in scope session
> -----
> -----
>
> However, this exception disappears when I first call the Action Servlet
> directly with a call such as http://localhost/myaction.do , followed by a
> http://localhost/MyLayer.jsp call.
>
> Apparently the bean has nothing to show when I first call MyLayer.jsp.
>
> Can someone suggest a better approach?
>
> Thanks
>
> Bob
>
> Ps.: the bean, X, get its values from a database.
>
> my struts-config.xml snippet :
>
> ---
> --
>
>       <global-forwards>
>         <forward name="books" path="/MyLayer.jsp"/>
>          -------
>          -------
>     </global-forwards>
>     <action-mappings>
>         <action path="/myaction"
>             type="com.myController.myAction"
>
>             scope="session"
>             >
>             <forward name="books" path="/MyLayer.jsp"/>
>         </action>
>
>     </action-mappings>
> ----
>



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RE: Best practices - help

Posted by Steve Raeburn <st...@ninsky.com>.
You should not access the JSP directly. Always send requests to the Action
which will return an ActionForward to the JSP. In your example you should
always be accessing /myaction.do and never /MyLayer.jsp

You seem to have it set up OK, but there's no need for your global forward
to the JSP.

Steve


> -----Original Message-----
> From: TopBid987654321@aol.com [mailto:TopBid987654321@aol.com]
> Sent: June 24, 2003 3:22 AM
> To: struts-user@jakarta.apache.org
> Subject: Best practices - help
>
>
> Is there a way to populate a bean  on a Server's (I'm using
> Tomcat) start up
> in Struts?
>
> I have a Java bean, say X, which is called and a populated in an Action
> Servlet, say myAction. Whenever I start my application and call a
> JSP layer say,
> MyLayer.jsp,  which is supposed to iterate this bean using
> <logic:iterate>,
>
> I get the exception:
> org.apache.jasper.JasperException: Cannot find bean X in scope session
> -----
> -----
>
> However, this exception disappears when I first call the Action Servlet
> directly with a call such as http://localhost/myaction.do , followed by a
> http://localhost/MyLayer.jsp call.
>
> Apparently the bean has nothing to show when I first call MyLayer.jsp.
>
> Can someone suggest a better approach?
>
> Thanks
>
> Bob
>
> Ps.: the bean, X, get its values from a database.
>
> my struts-config.xml snippet :
>
> ---
> --
>
>       <global-forwards>
>         <forward name="books" path="/MyLayer.jsp"/>
>          -------
>          -------
>     </global-forwards>
>     <action-mappings>
>         <action path="/myaction"
>             type="com.myController.myAction"
>
>             scope="session"
>             >
>             <forward name="books" path="/MyLayer.jsp"/>
>         </action>
>
>     </action-mappings>
> ----
>



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