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From Pid...@pidster.com>
Subject Re: Just a few questions on my Tomcat Configuration
Date Mon, 22 Jun 2009 19:54:59 GMT
(Late arrival, skimmed the thread, apologies if I'm off the mark).

Given the assumption of different data per user/client/company, is the
app identical for each company, bar aesthetic changes like images?


If so, with minor tweaks to your HTML, a servlet Filter which processes
the HttpRequestServlet.getServerName() field (to get the subdomain)
could look up the URL of a CSS file in a client DB, which is then
included in the document head.

CSS is plenty powerful enough to make all the visual changes you'd need,
if the underlying HTML is the same.  All subdomains would need to run on
the default host, but that would save you the effort of hard coding
Hosts each time.

You could also extend this to look up a more complex client object,
(still based on server host name), with config info, perhaps even a
unique DB name for use elsewhere.

Or not.


p




Josh Gooding wrote:
> Once again (sigh) .....
> 
> I just got out of my management meeting, they want to know if it can be done
> the "other" way, with all companies sharing the core code.  I'm not exactly
> sure on how I'd even begin to do this.  While I made a good point that A -
> it's more secure, and B - it is the better way of doing things, they did
> countered.  If we wanted to upgrade the software, it's better to upgrade one
> single install, than to upgrade 50 - 100 clients which takes a large amount
> of time.  It then becomes a logistical issue.  All that aside, would you
> have any clue as to how would I go about starting something like that?  I'm
> going to check the docs more closely, however, I am not confident that I
> will find anything like that in there.
> 
> - Josh
> 
> On Wed, Jun 17, 2009 at 10:10 PM, Caldarale, Charles R <
> Chuck.Caldarale@unisys.com> wrote:
> 
>>> From: Josh Gooding [mailto:josh.gooding@gmail.com]
>>> Subject: Re: Just a few questions on my Tomcat Configuration
>>>
>>> Maybe each company would have a customized few pages each with
>>> their own directories, tied to their own schema, etc, but point
>>> to the core application in another directory.  Everyone would
>>> see their own front ends, but use a common "framework" in the
>>> backend maybe?
>> That's quite a bit more than I was referring to, and I find it unlikely
>> that any company would want its processing to be shared with others in the
>> same webapp.  Better to have separate deployments for each, even if the
>> underlying webapp is identical in each instance.
>>
>>> Are those API's part of teh standard Tomcat docs?
>> The ones I referred to for adding and removing <Host> elements dynamically
>> are part of the Embedded class:
>> http://tomcat.apache.org/tomcat-6.0-doc/api/index.html
>>
>> The doc states that components can be added and removed on the fly, even
>> after the start() method has been invoked.  I've never tried it.
>>
>>  - Chuck
>>
>>
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