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Posted to users@tomcat.apache.org by nlif <na...@plimus.com> on 2008/10/23 16:56:04 UTC
How to serve two docBases under the same context path
Hi all,
I am using Tomcat 6, and I have the following problem:
I am trying to separate the static content from the dynamic content of my
application. In production, I intend to use Apache to serve the static
content, and Tomcat to process requests to the application (mainly JSP's).
This can be accomplished by writing a deployment script that will copy
everything to its repsective place.
My problem, however, is with the development environment:
The static-content (css,js,images,html) is in one SVN project, and the
dynamic (JSP,WEB-INF,classes) is in another. Thus, on my local workspace,
they are on separate paths (e.g. c:\workspace\static and
c:\workspace\webapp). Now, I need some way to have Tomcat serve them as a
single context.
I thought I'd create two <context> elements in my server.xml file, but they
will need to have the same PATH, like this:
<Context docBase="workspace\static" path="/myapp"/>
<Context docBase="workspace\webapp" path="/myapp"/>
Unfortunately, it is illegal to have two CONTEXT elements with the same PATH
value.
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Re: How to serve two docBases under the same context path
Posted by Hassan Schroeder <ha...@gmail.com>.
On Thu, Oct 23, 2008 at 10:23 AM, nlif <na...@plimus.com> wrote:
> Should my dev and prod environments be identical? Really? So you deploy your
> source files? :-)
> This is one of many cases in which the development environment does not
> match the production environment.
Well, "deploying source files" isn't exactly the same as having your
development infrastructure reflect, at least reasonably closely, that of
production. Personally I wouldn't work very long at a place that took
such a haphazard approach.
YMMV, but I'm not the one wasting time trying to work around this
easily fixable discrepancy :-)
--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
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Re: How to serve two docBases under the same context path
Posted by nlif <na...@plimus.com>.
Should my dev and prod environments be identical? Really? So you deploy your
source files? :-)
This is one of many cases in which the development environment does not
match the production environment. And as I explained in my other post, not
using Apache will not change my problem.
Hassan Schroeder-2 wrote:
>
> On Thu, Oct 23, 2008 at 7:56 AM, nlif <na...@plimus.com> wrote:
>
>> I am trying to separate the static content from the dynamic content of my
>> application. In production, I intend to use Apache to serve the static
>> content, and Tomcat to process requests to the application (mainly
>> JSP's).
>
>> My problem, however, is with the development environment:
>
> I'd say you should either forget about using Apache httpd altogether
> or make your dev environment match production.
>
> FWIW,
> --
> Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
>
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Re: How to serve two docBases under the same context path
Posted by Hassan Schroeder <ha...@gmail.com>.
On Thu, Oct 23, 2008 at 7:56 AM, nlif <na...@plimus.com> wrote:
> I am trying to separate the static content from the dynamic content of my
> application. In production, I intend to use Apache to serve the static
> content, and Tomcat to process requests to the application (mainly JSP's).
> My problem, however, is with the development environment:
I'd say you should either forget about using Apache httpd altogether
or make your dev environment match production.
FWIW,
--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
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Re: How to serve two docBases under the same context path
Posted by Johnny Kewl <jo...@kewlstuff.co.za>.
----- Original Message -----
From: "nlif" <na...@plimus.com>
To: <us...@tomcat.apache.org>
Sent: Thursday, October 23, 2008 4:56 PM
Subject: How to serve two docBases under the same context path
>
> Hi all,
>
> I am using Tomcat 6, and I have the following problem:
>
> I am trying to separate the static content from the dynamic content of my
> application. In production, I intend to use Apache to serve the static
> content, and Tomcat to process requests to the application (mainly JSP's).
> This can be accomplished by writing a deployment script that will copy
> everything to its repsective place.
>
> My problem, however, is with the development environment:
>
> The static-content (css,js,images,html) is in one SVN project, and the
> dynamic (JSP,WEB-INF,classes) is in another. Thus, on my local workspace,
> they are on separate paths (e.g. c:\workspace\static and
> c:\workspace\webapp). Now, I need some way to have Tomcat serve them as a
> single context.
>
> I thought I'd create two <context> elements in my server.xml file, but
> they
> will need to have the same PATH, like this:
>
> <Context docBase="workspace\static" path="/myapp"/>
> <Context docBase="workspace\webapp" path="/myapp"/>
>
> Unfortunately, it is illegal to have two CONTEXT elements with the same
> PATH
> value.
nlif, if your framework allows for this, this is what we do...
Think of URLs like this
<a href="<%=request.getContextPath()%>/pathTo/myThing.html">View My
Thing</a>
and then it becomes fairly easy to do something like
<a href="<%=aBean.adjustURL(request,"pathTo/myThing.html")%>">View My
Thing</a>
I normally use a parameter init in a servlet to set the base contexts I
want.
Its not unlike the filter idea mentioned which is what I think you may have
to do if you cant do the above.
The thing is that now we just design the web app and let TC serve the static
stuff in *one* webapp.
But changing a param in web.xml lets us move the static resources to
anywhere, later.
So adjustURL is basically saying....
If external context is null then use request.getContextPath
else if html do this thing etc.
else if jpg do that thing etc.
I use a bean via an attribute which is easy to do outside of frameworks, you
may find a static (thread safe) adjustURL is easier, and decide to wrap the
idea up in EL or a special tag handler.
I dont use tags and EL but it may be a cool thing to try...
with a static class it would prbably look like
<a href="<%=packag.name.adjustURL(request,"pathTo/myThing.html")%>">View My
Thing</a>
with EL something like
<a href="${my:adjustURL(request,"pathTo/myThing.html")}">View My Thing</a>
with tags (big guess here) something like
<MY:a href ="/pathTo/myThing.html">View My Thing</MY:a>
which could be a very cool thing if I knew how to do it ;)
Hope that idea helps... TC has got all this cool powerful stuff, maybe worth
giving it a try ;)
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Re: How to serve two docBases under the same context path
Posted by Jeff <jl...@gmail.com>.
On Thu, Oct 23, 2008 at 9:56 AM, nlif <na...@plimus.com> wrote:
> I am trying to separate the static content from the dynamic content of my
> application. In production, I intend to use Apache to serve the static
> content, and Tomcat to process requests to the application (mainly JSP's).
> This can be accomplished by writing a deployment script that will copy
> everything to its repsective place.
>
> My problem, however, is with the development environment:
What is your development environment? Eclipse?
In Eclipse, you could link the source of the static project into the
dynamic project. Eclipse might even automatically combine the content
in your war file. I have not tried this myself, so YMMV. You may need
to write a custom ant build file to create a combined war file. You
might have better luck posting on a list for your IDE. This is more of
an IDE problem than a tomcat issue.
--
Jeff
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Re: How to serve two docBases under the same context path
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Nlif,
nlif wrote:
> The problem stems from the decision to
> separate the web-app and static-content to two projects in SVN, and this is
> due to the fact that different people maintain them.
This shouldn't be a problem: set your <Context> to point to your actual
Tomcat-related stuff, and set your DocumentRoot (or Alias) to the static.
I don't know why you would ever need dual contexts unless you were
trying to mimic your production (split Apache httpd/TC) environment by
splitting your TC environment into two and trying to use two Tomcats
instead. If that's what you're trying to do, it won't work.
As I see it, you have several options:
1. Replicate your production environment in dev (always a good idea,
as Hassan suggested) by using Apache httpd alongside TC.
2. In dev, copy everything into the same deployment directory and
simply use a single context (i.e. merge these separate file sets
for dev).
3. Merge your project repos back together and do either #1 or #2.
Was there a particular reason to split your project in half like that in
the first place?
- -chris
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RE: How to serve two docBases under the same context path
Posted by nlif <na...@plimus.com>.
Theoretically, maybe, but in real-life heavy-duty production environments, I
believe using Apache as a front to Tomcat has advantages, in areas as
security, load-balancing, caching and scalability.
Furthermore, the production architecture is not the issue here, as I've
explained in my original post. The problem stems from the decision to
separate the web-app and static-content to two projects in SVN, and this is
due to the fact that different people maintain them.
Thanks anyway.
Caldarale, Charles R wrote:
>
>> From: nlif [mailto:naamanl@plimus.com]
>> Subject: How to serve two docBases under the same context path
>>
>> In production, I intend to use Apache to serve the static
>> content, and Tomcat to process requests to the application
>
> Why are you wasting your time, energy, and resources to do that? Tomcat
> is just as capable as httpd when it comes to handling static content.
>
> - Chuck
>
>
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>
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RE: How to serve two docBases under the same context path
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: nlif [mailto:naamanl@plimus.com]
> Subject: How to serve two docBases under the same context path
>
> In production, I intend to use Apache to serve the static
> content, and Tomcat to process requests to the application
Why are you wasting your time, energy, and resources to do that? Tomcat is just as capable as httpd when it comes to handling static content.
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
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Re: How to serve two docBases under the same context path
Posted by André Warnier <aw...@ice-sa.com>.
nlif wrote:
[...]
I will not, like some others (;-)), presume to guess why you want to do
this.
But I will presume that you have a clear way to distinguish what are
links to static content from what are links to dynamic content (e.g.
static ends in .html,.jpg,.css etc.. while dynamic ends in .jsp etc).
With that premise, I can think of two ways :
1) as others said, set up an Apache on your development environment and
do what you would do on your production one.
(JkMount and JkUnmount e.g.)
2) use a servlet filter in Tomcat like urlrewrite to catch either the
links to dynamic content or the others, and rewrite these links to point
to the other context.
See http://tuckey.org/urlrewrite/
and look at rules like
<rule>
<from>/allcontext/([^.]+\.(jpg|html|css))$</from>
<to type="redirect">/staticcontext/$1</to>
</rule>
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