Well, I suppose you do nothing more than what the specs states in most cases. Here's a
snippet of such a init webapp definition with two servlets ie. Struts controller and
your init servlet.
Your initServlet can cache some app scope parameters or whatever else.
Enjoy.
-----Original Message-----
From: Yan Zhu [mailto:[EMAIL PROTECTED]]
Sent: Thursday, January 09, 2003 6:55 PM
To: Emmanuel Bridonneau
Subject: Re: first action
great, thanks. how do you declare it in the web.xml?
Emmanuel Bridonneau wrote:
> You usually want to do this whilst initializing you app. In this case, simple and
>pretty much standard would be to write a servlet (generic if you don't want to be
>tied to http) as part of your web-app. All you do is implement its init() method and
>declare it in your web.xml. Only once init is done for all your servlets, can the
>users hit your pages.
> Emmanuel
>
> -----Original Message-----
> From: Damm, Gary [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, January 09, 2003 6:35 PM
> To: Struts Users Mailing List; [EMAIL PROTECTED]
> Subject: RE: first action
>
> Sounds more like a PlugIn. Here are the API docs:
> http://jakarta.apache.org/struts/api/org/apache/struts/action/PlugIn.htm
> l
>
> You just implement this interface, configure it in your config.xml file
> and you're up and running.
>
> Gary
>
> -----Original Message-----
> From: Yan Zhu [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, January 09, 2003 6:26 PM
> To: Struts Users Mailing List
> Subject: first action
>
> hey guys,
>
> what is the best way to implement a startup action that always will
> be executed first before any jsp is hit?
>
> thanks
>
> yan
>
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<web-app>
<servlet>
<servlet-name>controller</servlet-name>
. . . <!-- usual struts definition -->
</servlet>
<servlet>
<servlet-name>initWebApp</servlet-name>
<description>
This servlet produces GIF images that are dynamically generated
graphs, based on the input parameters included on the request.
It is generally mapped to a specific request URI like "/graph".
</description>
<servlet-class>com.mycompany.mypackage.InitServlet</servlet-class>
<init-param>
<param-name>listOrders</param-name>
<param-value>com.mycompany.myactions.ListOrdersAction</param-value>
</init-param>
<!-- Load this servlet at server startup time -->
<load-on-startup>5</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>controller</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>initWebApp</servlet-name>
<url-pattern>/init</url-pattern>
</servlet-mapping>
</web-app>
and then in your initWebApp,
//Servlet initialization parameters can be retrieved in a servlet or JSP page by calling:
String value =
getServletConfig().getInitParameter("saveCustomer");
ServletContext myWebContext= getServletConfig().getServletContext();
myWebContext.getAttribute(AttributeKeys.WEB_CACHE) ; get/setAttribute
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