Just thought of a another way to map files... and I think it may work out
better... but dont ask me how to set it up I've forgotten... because linux
never breaks.
Try Samba.... on linux, it allows you to map the linux file system to
windows.
So the windows guys will be working with files just like they normally do...
but those files actually live on the linux server.... now if you symlink on
linux, windows will just think its the normal file system. I like this more
because I know it works and it means you also have the test case running on
linux... ie if you stick tomcat on linux, the changes on windows will just
happen there as well.... Samba... its better... no daring technology on MS
thats always going to be a headache to maintain.
----- Original Message -----
From: "Johnny Kewl" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <[EMAIL PROTECTED]>
Sent: Wednesday, April 11, 2007 11:12 PM
Subject: Re: virtual directory
I dont know... I think you have be spoilt by linux .... windows shortcuts
just dont equal linux soft links... hey! :)
I see what you saying.... even if say you made a little servlet that could
suck files from anywhere, how does the calling program see shell folders,
I suppose you could make the URL mimic files like
http://myMagicFileSucker/filesystem/subfolder but its never going to be
enough to make a normal java program think its a folder.
I think if you had linux links on windows, it would make you happy... and
guess what, its possible but MS doesnt advertise it because there are a
few things a normal user can do that can really screw things up.
Have a look at a free solution and have a look at microsofts solution...
they call linux links... junction points.
Free solution http://www.rekenwonder.com/linkmagic.htm
Microsoft http://support.microsoft.com/kb/205524
You will be able to map external folders to a tomcat webapp folder...
I think this is a kludge of last resort and I wouldnt recommend it to any1
unless there is absolutely no other way.
Make sure your programmers really understand things like if they delete a
junction point in explorer... weird stuff can happen because the ms file
explorer doesnt know what these things are.
Whew!... just be careful... I'm thinking about stuff like tomcats auto
deployment... I mean if that whacks the folders before it makes new ones,
and it probably does... some programmers files somewhere else will get
whacked if you drop another WAR file in... ha ha, but then hey I suppose
that should also happen on linux links... anyway test it carefully.
....have fun.... I'm putting on my bullet proof vest, and changing my
name... so you will never find me again.... ha ha.
----- Original Message -----
From: "Sylvain Roche" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <[EMAIL PROTECTED]>
Sent: Wednesday, April 11, 2007 4:16 PM
Subject: Re: virtual directory
Hi Johnny, hi everybody
I took the images example to explain and simplify the problem, but
actually I may need to include different contents, which may be static -
like images, flash animations, html pages - but may also be jsp pages for
exemple, and some of these contents are likely to be generated by another
web application.
This works fine for years with oc4j / orion, so we would rather have the
lesser to change before we can switch oc4j for tomcat. In fact if we
can't manage to do that, it may be a reason to discard tomcat from our
choice list, because some part of our application relies on virtual
directories.
Best regards
Sylvain
At 10:14 11/04/2007, Johnny Kewl wrote:
Hi sylvian....
When developing I do this
request.getContextPath() + uri;
but I wrap the request.getContextPath() in a little routine like say
imageMap(String uri) and use that in my JSP's
Thats cool because if I change the context path the app doesnt break...
BUT... I do it for a much better reason.
When I'm done making a Tomcat app I move all the images to the Apache
server...
And then just change imageMap(String uri) to point to the Apache Web
server url...
Apache Web Srvr is damn good at delivering images and Tomcat speeds up
nicely when you do this.....
I actually cant believe that people use cross context stuff for
images.... if you dont want to use apache, the you could make a single
webapp, dump all your images in there, and just address that in your
other apps, http://myImageTomcatServer/image/xxx.jpg
Let the browser join the images for you... if you have a look at web
pages you will often see the images come from a different server... like
look at web counters for example.
Heres another example.... if I make a captcha generator (you know those
little images that have numbers in them) then I make a seperate servlet
called CapchaGen.jpg.... and in my other apps I call that URL.... image
appears in the browser.
What document is this that you talking about... sucking images from other
webApps through context sharing... sounds crazy?
Good luck
[EMAIL PROTECTED]
----- Original Message ----- From: "Sylvain Roche"
<[EMAIL PROTECTED]>
To: "Tomcat Users List" <[EMAIL PROTECTED]>
Sent: Tuesday, April 10, 2007 7:23 PM
Subject: virtual directory
Hi
this seems a very classical problem for tomcat users, but I couldn't
find on the web a solution which satisfies me.
We plan to host multiple applications, on a tomcat box. These
applications may all need an images directory. But of course each of
them has a different images directory.
What we want to do is to deploy different versions of each application,
without the need to move the images.
The crosscontext context solution, which is the one given everywhere,
does not correspond to our need, because, as far as I tried it
- I may need an unknow depth for the point I will make the link, for
example, it could be /images/layout/DE_de
- I need to have a mapping inside my web-app, ie inside the context
rather than at the same level
- when I read the doc, it seems to me that this is a workaround, a
misuse of something that was made for being able to dispatch requests to
another application - what I want is only to link something out of my
application deployment path as if it was inside. I don't know if it is
wise to rely on this workaround for long term
- the same mapping (/images) has to be different for each application
basically this is what is performed on Oracle's OC4J with the
virtual-directory directive, on weblogic with virtual-directory-mapping.
Actually I found some kind of virtual directory on every j2ee server but
tomcat. I can't imagine that this problem has no solution other than the
cross context. I may have missed something, but where ?
Best regards
Sylvain
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