CSCI315

Web Server

There are numerous available web servers. I used to suggest using our UNIX machine (running Tomcat) to deploy your servlets, but due to lack of control
(getting newer versions of the servlet to run, etc), I now suggest that you download Eclipse (and for the last lab Tomcat also) and run it on your own machine.
I will be running that configuration on mine so you can send me a war file (more on that later) once yours is running fine on your own server. Here is access to downloads for your own use:

Tomcat , Eclipse, Tomcat and Eclipse
Class discussion... it looks like the EE version still needs you to provide a web server.
Here is a comparison between the two Eclipse versions.
If the server is needed, I would like to stick with Tomcat.
a link to directory information (although Eclipse will do this for you)

Although we are not using the J2EE Application Server, there are notes in the J2EE Tutorial Chapter 3 with nice diagrams of how J2EE servers are set up (local same page)

presentation-oriented

service-oriented

For presentation-oriented, it points the reader to the servlet chapter of the tutorial.
For service-oriented, it then points the reader to Building Web Services with JAX-RPC and SOAP with Attachments API for Java

Linking Servlets and JSPs (Three Ways to Redirect the User)

There are different ways to connect your servlets and JSPs.

Indirectly: Simply provide a link
"A web component indirectly invokes another web resource when it embeds a URL that points to another web component in content returned to a client." ShowCartServlet.java (gets a session too).
response.encodeURL( ... )
response.sendRedirect
Another alternative, if you are moving to a page that does not need the current servlet anymore, is to invoke sendRedirect on the response object and pass it the next servlets URL. (Core Servlets (page 125) and page 9 (of 30). For example, after someone fails to log in, you might want to direct them to an application form:
response.sendRedirect("http://localhost:8080/myWarDir/ApplicationForm");
For examples: See O'Reilly Course 6 Lesson 8
include and forward
The page (Web App Life Cycle) in the tutorial is quite useful for linking JSPs.
This is a nice chapter - it ties a lot of things together. The Web App Life Cycle section shows code for how one servlet can tell the next one information about the context through a RequestDispatcher . Here is another link about sharing information and an example of its use invoking other web resources and transferring control (forward and include)
Note use of dispatcher.include(request, response); and dispatcher.forward(request, response);
To see what is happening here, Marty Hall has a nice link to some example code on his Request Forwarding snippet
For examples: See O'Reilly Course 6 Lesson 13

( which? )

The J2EE API (1.4 local)