Why not turn your resources into Singleton classes. Since all the Servlets
in a server are running in the same JVM, they will all access this shared
resource with no more work being required.
(*Chris*)
----- Original Message -----
From: Mike Fontenot <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, March 11, 1999 10:18 AM
Subject: Help - Interservlet communication?
>I am wrapped around the axel on this one, based on the new 2.1 api.
>Basically I want to be able to call servlet B during the
>#init(ServletConfig) method of servlet A while it is loading.
>
>Here is what I am doing now (using JRunPro 2.3):
>
>I have a ResourcePool servlet that provides shareable resources like DB
>Connections, Threads, etc, to other servlets. When it is loaded (via an
>alias) the first time it initializes all this stuff and its resources
become
>available to others. By using aliases for these resource servlets, many
>applications can start their own version of the resource servlet complete
>with their own unique configuration requirements.
>
>I have an application controller servlet for each servlet based
>'application' running, that will start first. This app servlet is usually
>loaded via the preload=true in the servlets.properties. In its #init
method
>it calls #ServletContext.getServlet(String) for other servlets it needs to
>be sure are alive and active to complete its initialization process. The
>list of servlets it needs are found in its own configuration file it has
>just loaded. In the case of the above ResourcePool Servlet, the app servlet
>can now call methods on it to get to the pooled resources.
>
>The nice thing about this is that I can control the startup/access to
>resource related servlets in this manner. If a resource servlet is not
>already loaded the servlet engine loads it and calls its #init method. Life
>is good.
>
>Now, with API 2.1 the RequestDispatcher seems to be the preferred way to
get
>another servlet. But not really, you don't really get a 'Servlet' handle.
>Instead you just seem to get the ability to forward/include
request/response
>related objects. During the #init phase of my application servlet these
>objects do not exist. Also, doing something like:
>
>RequestDispatcher rd =
>_myServletContext.getRequestDispatcher("/servlet/"+RES_POOL_CONTAINER_SERVL
E
>T_ALIAS) works but without throwing Exception but it does not load the
>target servlet and cause it to initialize. Also, there is no handle to the
>resource servlet that I can use.
>
>Are there any recommended solutions for this situation?
>Thanks in advance
>
>========================================
>Mike Fontenot - Object Systems Architect
>Polygon Network, Inc.
>Golden, CO
>========================================
>
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