Re: is it difficut to deploy j2ee aplications at customer sites?

From: Erwin Moller (since_humans_read_this_I_am_spammed_too_much_at_spamyourself.com)
Date: 02/10/04 

Date: Tue, 10 Feb 2004 09:24:06 +0100

Hi,

The pro-JE22 answer is:
No, it is just a warfile you place on the right spot. The J2EE container
will read all the stuff insde it and unpack it and instantiate it.

The real answer is:
If your app is anything more than plain simple jsp, you could run into some
tweaking, eg username/password for dababaseconnections. Or writepermission
on directories you want to use, etc. etc.
If you use a database, of course you must first create such a database at
your customerssite too.

If you use *anything* that is connected to a certain IP-adres or protocol or
whatever that needs some initial settings, you need to set the correct
values for your customers machine.

The short answer is: Just try it.
I have been deploying the same app on a few machines now, and just doing
that learned what to take out of the code and put in an easy 'tunable'
place.
(I choose for web.xml and retrieve the all tunable values from there. So
before deploying the app somewhere I now only have to read through this
(plaintext) xmlfile and adjust a few numbers, ipadresses, etc)

In my opinion your app becomes more mature if you deploy it on different
machines because you will find out (the hard way) how you should develop an
easy-to-deploy app in the future.

So my advise is simple: just try. Just install some tomcat somewhere and
deploy your app. What goes wrong? How to improve?

Good luck,
Erwin Moller

PS: I am quite sure some wise experienced people wrote some great stuff
about this already.

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