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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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