I would skip EJB for now. You don't need to know about EJB to use FDS
(note FDS was recently re-branded as LiveCycle Data Services ES 2.5
which is the latest release available).
The concepts behind web apps in .NET are very close to the concepts of
J2EE. There should be tons of web postings comparing J2EE to .NET.
I'd start by getting familiar with simple J2EE deployments, that is
start with a web application archive (WAR). These are essentially zip
files that can be deployed on a J2EE server (like JBoss, or simply
Tomcat). Get a feel for how the configuration looks under the /WEB-INF
directory, how Servlets (and JSP pages) can handle HTTP GET/POST
requests to produce dynamic web apps, go over the basic parts of the
web.xml configuration file, work out how classes are found in the
classpath, such as /WEB-INF/lib for *.jar libraries and /WEB-INF/classes
for loose *.class files. Read up on web application contexts and how the
WAR context path delineate the root URL of the application.
You can use Flex's RemoteObject to call a plain old Java object, or use
Producers/Consumers for real-time messaging to create publish/subscribe
applications, or use DataService to get comprehensive management of
distributed data graphs to build powerful collaborative
applications/dashboards etc.
Pete
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of aaronvm707
Sent: Thursday, June 07, 2007 11:39 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Flex Java, Where to Start?
Thank you very much for all the info. I think the key word I was
looking for was EJB. Is this what I will develop in order to start
using Flex Data Services?
Any suggestions on the server software needed to run EJB J2EE? Again
I am moving from a Microsoft, .net, IIS environment so I am completly
new to all this. Thanks
Aaron
--- In flexcoders@yahoogroups.com mailto:flexcoders%40yahoogroups.com
, simonjpalmer [EMAIL PROTECTED]
wrote:
Sun has a very comprehensive online documentation of the Java
language.
This is a good book if you are a seasoned developer and just wanting
to pick up Java Java In A Nutshell by David Flanagan, O'Reilly.
Another really good book is Just Java 2 by Peter van der Linden, Sun
Microsystems Press. I learnt Java from these (C++ background) and I
recommend both.
There aren't really variations of Java itself, so a basic grounding in
the language is something that you can use whatever you end up doing.
However there are lots of design and coding patterns around Java
which give high productivity, especially when using Java to write
server software, which is probably what you mean by Java as it relates
to Flex. Java doesn't specifically relate to flex or vice versa, but
there is middleware which serialises between Java and ActionScript,
such as FDS.
On the server you will need to look at EJB and J2EE and I would
recommend Spring, although it takes a bit of getting your head around,
and Hibernate if you are persisting your data relationally. These are
all frameworks for coding which, with supporting packages from 3rd
parties, give a high degree of productivity in writing scalable Java
servers. It is truly amazing how much fee code there is available.
You'll probably wind up with Eclipse as an IDE too, so it is worth
familiarising yourself with that. Don't expect the Microsoft IDE, but
it is pretty good all the same.
I'm sure lots of people will comment, but i hope that gives you some
first pointers of what to google.
Good luck
--- In flexcoders@yahoogroups.com
mailto:flexcoders%40yahoogroups.com , aaronvm707 vestamedia@
wrote:
Hello,
I have begun working with Flex a couple of months ago and have been
learning fairly quickly. I come from a Microsoft ASP.net background,
but would prefer to work with Flex Java. Can anyone suggest
resources and/or books to start learning Java as it relates to Flex.
There seams to be many variations of Java for different development
needs I am not sure where to begin. Thanks
Aaron
