Best Practice for managing variables for multiple environments

Question

I am very new to Java WebDynPro and have a question
concerning our deployments to Sandbox, Development, QA,
and Production environments.
What is the 'best practice' that people use so that if
you have information specific to each environment you
don't hard-code it in your Java WebDynPro code.
I could put the value in a properties file, but how do I
make that variant?  Otherwise I'd still have to make a
change for each environment to the property file and
re-deploy.  I know there are some configurations on the
Portal but am not sure if that will work in my instance.
For example, I have a URL that varies based on my
environment.  I don't want to hard-code and re-compile
for each environment.  I'd prefer to get that
information on the fly by knowing which environment I'm
running in and load the appropriate URL.
So far the only thing I've found that is close to
telling me where I'm running is by using a Parameter Map
but the 'key' in the map is the URL not the value and I
suspect there's a cleaner way to get something like that.
I used Eclipse's autosense in Netweaver to discover some
of the things available in my web context.
Here's the code I used to get that map:
TaskBinder.getCurrentTask().getWebContextAdapter().getRequestParameterMap();
In the forum is an example that gets the IP address of
the site you're serving from. It sounds like it is going
to be or has been deprecated (it worked on my system
right now) and I would really rather have something like
the DNS name, not something like an IP that could change.
Here's that code:
String remoteHost = TaskBinder.getCurrentTask().getWebContextAdapter().getHttpServletRequest().getRemoteHost();
Thanks in advance for any clues you can throw my way -
Greg

Answer 1

Hi Greg:
     I suggest you that checks the "Software Change Managment Guide", in this guide you can find an explication of the best practices to work with a development infrastructure.
this is the link :
http://help.sap.com/saphelp_erp2005/helpdata/en/83/74c4ce0ed93b4abc6144aafaa1130f/frameset.htm
Now if you can gets the ip of your server or the name of your site you can do the next thing:
HttpServletRequest request = ((IWebContextAdapter) WDWebContextAdapter.getWebContextAdapter()).getHttpServletRequest();
String server_name = request.getServerName();
String remote_address =     request.getRemoteAddr()
String remote_host = request.getRemoteHost()
Only you should export the servlet.jar in your project properties > Build Path > Libraries.
Good Luck
Josué Cruz