I am
new to Orion but have experience of Java and have used the jar process
several times to archive classes.
However, has anyone got an example of using jar to create a Web
Application war file that includes jsp and bean classes.
Thanks for any help.
Hmm..something I think I can answer..at least to
some degree.
WEB-INF is a dir usually below each Web Apps WWW
dir. WEB-INF is where you would place your compiled classes
(WEB-INF/classes) and any 3rd party libraries you would use (WEB-INF/lib).
You also have a Servlet 2.2 standard web-app descriptor, called web.xml.
This is where you map servlets, set up welcome files, and so on. The .WAR
file type is really nothing more than a www dir jarred up (.jar) but with a
.war extension. It includes the www folder, and the WEB-INF folder below it,
with the compiled classes of the servlets/javabeans/core classes, and 3rd
party libraries. You can deploy a single .war file into any J2EE app server
that properly implements the spec. Actually, it can be deployed into any
Servlet 2.2 container. ServletExec and Resin are two engines that are not
J2EE app servers, but do manage Servlet 2.2/JSP 1.1.
META-INF is, as far as I know, where a J2EE
standard application.xml descriptor goes, and is part of the .EAR file
format, which can include many web-apps (many www with WEB-INF dirs below
each), as well as EJBs. A single EAR is considered an application in itself,
probably because you can deploy EJBs into any J2EE app server using an EAR
(if that app server supports EARs). I don't know the full gist of EAR but I
do know Orion supports it, including hot-swap (at least I think it supports
hot-swap) of EAR applications. I am not sure of the full benefit of EAR over
WAR, other than that you can contain many WAR files in a single EAR, as well
as any number of EJB's. EAR stands for Enterprise Application aRchive,
whereas WAR stands for Web Applicat aRchive.
Hope that sheds a little light on the
topic.
What is the difference between WEB-INF and
META-INF? How do these directory structures relate to jar, ear, and
war files? Which of these is J2EE, and which is
Orion-specific? Maybe I am confusing something with
Tomcat...
-
Mark
MetaPack
The Lightwell
12/16 Laystall Street
Clerkenwell
London EC1R 4PF
Tel: 020 7843 6720
Fax: 020 7843 6721
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