server.coldfusion.rootdir

[Dave Merrill]

Hi folks,

In Railo 3.3.1, I'm getting empty string for
server.coldfusion.rootdir. Is this intentional, or a bug? It's clearly
a difference from ACF.

Re my actual use case, I'm looking for a way to uniquely distinguish
the CFML engine instance running my code on from others on the same
server. Ideally this would be a technique that's usable on ACF, Railo,
and Open BlueDragon. This is in environments that may have multiple CF
instances, potentially running on different CFML engines.

Starting my investigation from ACF, I thought
server.coldfusion.rootdir could do it, but hit the above empty string
behavior on Railo.

Thanks for any thoughts,

Dave

[Dave Merrill]

The other alternative so far is cgi.server_port, but my guess is that
may not be unique on a machine w more than one NIC (don't have the
hardware to test that right).

Dave

[Todd Rafferty]

Open a ticket and mark it as a compatibility issue.

--
~Todd Rafferty
Volunteer Community Manager
Railo Server - Open Source
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[Todd Rafferty]

Wait a sec, Doesn't Railo state that it's railo in the server scope somewhere? o_O

On Wed, Oct 12, 2011 at 9:54 PM, Dave Merrill <enig...@gmail.com> wrote:

[Todd Rafferty]

<cfdump var="#server.coldfusion.productname#"> is what you're looking for.

[Dave Merrill]

Sorry if I wasn't clear, I'm not trying to detect which engine it is,
I've got that.

I want a way to "fingerprint" each running instance, to tell it apart
from other running instances, regardless of what engine they're using,
even when there may be multiple instances of the same engine.

For example, my laptop has one instance each of latest Railo, latest
BD, and ACF 8, plus three instances of ACF 9, and I need to be able to
tell each of those apart in code.

Make sense?

Dave

[Dave Merrill]

Maybe the best choice is ExpandPath('/'). Even though I have seen some
sites that have a mapping for that, it still must be different from,
and outside, the path that defines for every other CFML instance.

Still curious about my original question though.

Dave

[Denny]

On 10/12/11 9:15 PM, Dave Merrill wrote:
> Sorry if I wasn't clear, I'm not trying to detect which engine it is,
> I've got that.
>
> I want a way to "fingerprint" each running instance, to tell it apart
> from other running instances, regardless of what engine they're using,
> even when there may be multiple instances of the same engine.
>
> For example, my laptop has one instance each of latest Railo, latest
> BD, and ACF 8, plus three instances of ACF 9, and I need to be able to
> tell each of those apart in code.

If you've got control of the startup, you can set a system property when
starting the engine and tell that way. I do something like this with
JBoss clusters to determine which node it's on, etc..

Or you could try something like expandPath("/") to see what the root dir
is. Or maybe drop to java and to a getResource() on something...

Obviously the most accurate is the explicit one (setting a property on
startup), but you may not have that control.

:Denny

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[Dave Merrill]

Thanks for the thought Denny, but you hit it -- I don't have the
option to set a property at startup.

This is a "guest" package, designed to run under any app, that lets
you view and manipulate dbs and files, plus evaluate or run code you
type into it. Very very handy for debugging remotely.

Looks like ExpandPath('/') may win here; see my msg above. Still
wondering what's up w the blank rootdir though.

Dave

[Randy Merrill]

Could the rootdir in Railo actually be what context it is running in?
--
Randy Merrill

[Denny]

On 10/12/11 9:28 PM, Dave Merrill wrote:
> Thanks for the thought Denny, but you hit it -- I don't have the
> option to set a property at startup.
>
> This is a "guest" package, designed to run under any app, that lets
> you view and manipulate dbs and files, plus evaluate or run code you
> type into it. Very very handy for debugging remotely.
>
> Looks like ExpandPath('/') may win here; see my msg above. Still
> wondering what's up w the blank rootdir though.

Most the time it would probably work, but...

I'd lean towards a getPageContext() type of deal probably.
getPageContext().getServletConfig() maybe? Something like that, which
is tied to the servlet vs. a potentially incorrect file system path.

As for the rootdir, it sounds like it's a valid ticket. File away! :)

[Denny]

It looks like we could change ServerImpl.java rootDir to:

String rootdir= pc.getConfig().getRootDirectory().getAbsolutePath();

And get the web context web root, but Micha would know for sure.

:Denny

[Gert Franz]

Well something that works definitely on Railo is
expandPath("{railo-server}"). This will return you where the server context
directory is under Railo and this is unique per instance (has to be).
expandPath("/") imho wouldn't help since you might end up getting the same
directory for two instances in CF if you use them in a cluster and all point
to the same webroot. I guess best is to file a bug.

Greetings from Switzerland
Gert Franz
 
Railo Technologies      Professional Open Source
skype: gert.franz         ge...@getrailo.com
+41 76 5680 231           www.getrailo.com

-----Ursprüngliche Nachricht-----
Von: ra...@googlegroups.com [mailto:ra...@googlegroups.com] Im Auftrag von
Denny
Gesendet: Donnerstag, 13. Oktober 2011 06:13
An: ra...@googlegroups.com
Betreff: Re: [railo] server.coldfusion.rootdir

[Michael Offner]

server.coldfusion.rootdir works for me?!

i have no idea atm why this is not working in your case, but we will check.

/micha

2011/10/13 Gert Franz <ge...@getrailo.com>

[Todd Rafferty]

It is empty on a windows machine.

[Michael Offner]

do you see a stacktrace in error stream?

/micha

2011/10/13 Todd Rafferty <to...@getrailo.org>

[Todd Rafferty]

No, there's no error on the page or stacktrace. It's a valid "empty" string.

[Robert Zehnder]

FWIW, I am getting a blank string as well for server.coldfusion.rootdir on Ubuntu 10.10 and Railo 3.1.1.000

--
Robert Zehnder

[Dave Merrill]

I will file the bug when I get a chance, since it's clearly an
incompatibility with ACF, and apparently different on different
platforms, regardless of what you need it for.

However, thinking through my specific use case, it turns out that I
don't actually need to tell engine instances apart, only the root
directories they serve from. Given that, ExpandPath('/') is probably
better in the cluster case.

Dave

[Tom Lenz]

Works for me too, Windows XP, Railo 3.3.1.000

[Dave Merrill]

https://issues.jboss.org/browse/RAILO-1561

[Todd Rafferty]

FYI: I'm on Windows 7, Railo 3.3.1.000 and Tomcat 6 & 7. I haven't tested my linux machines yet.