On Monday 01 August 2005 00:52, Michael Peters wrote:
> Jan Berwich wrote:
> > Hi
> >
> > I have a small Java class which I'd like to embed into a mod_perl module.
> > The class imports several packages from a .jar file. It works when
> > embedded into a Perl CGI script, but not under mod_perl. It fails with a
> > message like "package org.example.widget.document does not exist". The
> > CLASSPATH is correct and the .jar files exist at the specified locations
> > and are the same ones which work for the CGI script.
>
> How do you know that the CLASSPATH is set?
It's in the debug output:
[perl]
[2] classpath:
/usr/data/www/java/example-1.4.3.jar:/usr/data/www/java/example-widget-1.9-rc1-dev.jar:/usr/lib/perl5/site_perl/5.8.5/i586-linux-thread-multi/Inline/Java/InlineJavaServer.jar
> Inside of you mod_perl module, before you load your java classes in a
> BEGIN block, print out $ENV{CLASSPATH} and see what value you get. If
> you don't get what you expected, you can set that value either in you
> httpd.conf or your startup script.
That was also showing the value I expected.
> Whenever there is a problem
> with something that runs under mod_cgi but not mod_perl it's typically
> user, permission and environment differences. What user are you running
> apache as?
Initially the default "nobody" user, but changing it to a dedicated
"www" user doesn't make any difference.
> > I'm using: Apache 2.0.54 with mod_perl 2.0, JDK 1.4.2. Inline::Java is
> > 0.50; while building with perl Makefile.PL I said "yes" to building with
> > JNI, "server" when there was a choice between server and client
> > (apologies, I can't recall exactly what) and "no" to all the options.
>
> I've used Inline::Java with mod_perl and it has been working just fine.
Have you used it with mod_perl2 by any chance?
> But I've never used it with JNI under mod_perl so I couldn't tell you if
> that might be an issue or not.
I've tryed Inline::Java with and without the JNI option, that doesn't seem
to be making any difference either.
However, experimenting with Inline/Java.pm shows that the CLASSPATH set
in Inline::Java is not passed to the environment when system() is executed.
Inserting
system('env > /tmp/somefile');
just before
my $res = system($cmd) ;
produces a list of environment variables where CLASSPATH is not set
Changing system($cmd) to
system("CLASSPATH=$ENV{CLASSPATH} $cmd") ;
($ENV{CLASSPATH} is set prior to this, and contains the correct values, as
supplied by the debug output) then gives me a different set of errors like
this:
[perl][1] starting JVM...
[perl][1] client/server mode
[perl][4] portable: GOT_ALARM for linux is default 'define'
[perl][4] portable: EXE_EXTENSION for linux is default ''
[perl][4] portable: SUB_FIX_CMD_QUOTES => "/usr/bin/java"
org.perl.inline.java.InlineJavaServer 5 7891 true false for linux is default
'"/usr/bin/java" org.perl.inline.java.InlineJavaServer 5 7891 true false'
[perl][2] "/usr/bin/java" org.perl.inline.java.InlineJavaServer 5 7891 true
false
[perl][4] portable: DEV_NULL for linux is default '/dev/null'
[perl][4] portable: GOT_ALARM for linux is default 'define'
Exception in thread "main" java.lang.NoClassDefFoundError:
org/perl/inline/java/InlineJavaServer
[Mon Aug 01 08:26:51 2005] [notice] child pid 7877 exit signal Alarm clock
(14)
After manually executing "perl -MInline::Java::Server=start" the code
then seems to compile without error. Haven't got it to run yet, but I've
probably borked something else along the way.
Thanks
Jan Berwich
