On Wed, Nov 25, 2009 at 10:23 AM, Mathijs Kwik <bluescreen303_at_gmail.com> wrote:
> Hi all,
>
> I'm investigating to move to glassfish v3 when it comes out, so I
> installed the latest preview (glassfish-v3-b73).
>
> I have a couple of questions:
>
> 1) I found "ruby container" and installed jruby. Now if I want to
> deploy rails apps, I have to turn them into a .war file I think.
> Do I need to use warbler for this?
If you want to make WARs, yes.
As you say, WARbler will bundle a Ruby webapp with JRuby into
a WAR file.
Alternattively you can install the (j)ruby container and just deploy
directories of unmodified Ruby code
(which is essentially what the Glassfish gem does).
Pretty much any Rack-enabled Ruby app should work, so long as
you're not using native code.
> Also, I think the gem will start separated vms for every app and not
> use the installed glassfish, but I might be mistaken.
For the gem that's correct. If you
'asadmin deploy /path/to/rails/app' --contextroot /foo
'asadmin deploy /path/to/another/rails/app' --contextroot /bar
then you can run mulitple ruby apps on the single Glassfish JVM.
> 2) I have some java applications (mainly network server) that are
> currently just started by "java -jar" with some parameters.
> How can I tell glassfish to serve the application and what parameters to pass?
> I tried uploading the jar but I get errors about missing framework.
Java runs WARs, EJBs, etc. If you've written a standalone app you'll
need to recode
it to use e.g. the servlet API before you can deploy it to Glassfish.
> 3) Filesystem security per app
> When running multiple applications, if 1 app gets hacked, I don't want
> the intruder to be able to look/modify other application code/state.
> Using ruby (the c version), I just created multiple system users and
> started their processes as that user. I then used filesystem
> permissions to make sure a hacked app could not reach other app
> directories.
> Since glassfish runs as a single user, I would like to somehow impose
> a similar restriction on apps.
> How can I achieve this?
Java webapps can't see the state of other webapps. It's much less of an
issue.
> 4) Jetty as servlet container
> I've done some testing/playing with jetty (v6) continuations. I would
> like to do some more serious comet-like stuff in the future.
> Is it possible to configure glassfish to use jetty for web applications?
> Or does glassfish offer something similar?
> It's not just for the comet stuff, I understood jetty is also very
> good performance-wise.
Glassfish supports Comet. Haven't tried it myself yet, but the Atmosphere
framework looks very interesting (even has JRuby support):
http://weblogs.java.net/blog/jfarcand/archive/2009/10/26/atmosphere-04-released
I've not seen any benchmarks on Jetty vs. Glassfish,
but I'd be surprised if GF was signigficantly slower.
It does have a bigger memory footprint, but one big drive of
v3 was to strip down the Glassfish core so you could only run with the
minimum API support you needed (e.g. Ruby support loads on demand,
so does JMS / EJB support).
You might well find GFv3 has what you need anyway.