Forum: JRuby 1.7.2 Exception

I have a java shell application. I recently brought it back, the main 
reason being to see what was going on with all this new java scripting 
stuff like invokedynamic. Sort of got it working with some functionality 
for JRuby 1.6.7.
Recent talk about performance and invokedynamic got me to thinking maybe 
I'd get current and go from there.
I had googled up some stuff and had tried to add a jirb command into the 
application. That currently is run off this

  public static void main(final String[] args) {
      final ConsoleInterface console = CommandLine.getConsole();
      final Jirb jirb = new Jirb();
      Thread.currentThread().setContextClassLoader(jirb.getClass().getClassLoader());
      final RubyInstanceConfig config = new RubyInstanceConfig() {{
          setInput(console.getIn());
          setOutput(System.out);
          setError(System.out);
          setArgv(args);
      }};
      final Ruby runtime = Ruby.newInstance(config);
      runtime.getGlobalVariables().defineReadonly("$$", new 
ValueAccessor(runtime.newFixnum(System.identityHashCode(runtime))));
      runtime.getLoadService().init(new ArrayList());
      hookIntoRuntime(runtime,jirb);
      if (runtime.getClass("HP") == null) {
      runtime.evalScriptlet(
                 "class HP\n"
                +"require 'java'\n"
                +"def hp(*cmd)\n"
                +"  _ps = org.cmdline.cmdIO.ArrayCmdOut.getInstance()\n"
                 +" 
org.cmdline.psuedoGestalt.CommandShell.new.command(cmd.join(\" 
\"),true,_ps,_ps);\n"
                 +"  _result = _ps.getOutput()\n"
                +"end\n"
                +"\n"
                +"def hpQ(*cmd)\n"
                +"  _ps = org.cmdline.cmdIO.QueueCmdOut.getInstance()\n"
                +" 
org.cmdline.psuedoGestalt.CommandShell.new.command(cmd.join(\" 
\"),true,_ps,_ps);\n"
                +"  _result = _ps.getOutput()\n"
                +"end\n"
              +"end"
             );
      }

The application is called HalfPipe, since it sometimes seems like I'm 
just using it to do new skateboarding tricks. But from that, came the HP 
class which is supposed to be glue code to allow the ruby code command 
line API type access back into the application shell.
So you could do something like
halfpipe = HP.new
halfpipe.hp("exec jps");

This worked fine 1.6.7 but at 1.7.2 I get

jirb
org.jruby.exceptions.RaiseException: (NameError) ArrayJavaProxy is 
already defined
  at org.jruby.RubyKernel.require(org/jruby/RubyKernel.java:1027)
  at 
RUBY.require(/Library/Frameworks/JRuby.framework/Versions/Current/lib/ruby/shared/rubygems/custom_require.rb:36)
  at RUBY.HP(<script>:2)
  at RUBY.(root)(<script>:1)

Would anyone have any thoughts what might be different and how I should 
now work this?

Michael Hall

trz nio.2 for OS X http://www195.pair.com/mik3hall/index.html#trz

HalfPipe Java 6/7 shell app 
http://www195.pair.com/mik3hall/index.html#halfpipe

AppConverter convert Apple jvm to openjdk apps 
http://www195.pair.com/mik3hall/index.html#appconverter

On Jan 27, 2013, at 9:51 AM, Michael Hall wrote:

I commented out this line and it is now working at 1.7.2, haven't back 
tested 1.6.7.

>       runtime.getLoadService().init(new ArrayList());

If anyone curious, it looks like this working

jirb
Switch to inspect mode.
irb(main):001:0>halfpipe = HP.new
#<HP:0x65eee8c>
irb(main):002:0>halfpipe.hp("exec jps")
#<Java::JavaUtil::ArrayList:0x3eec44a6>
irb(main):003:0>jprocs = halfpipe.hp("exec jps")
#<Java::JavaUtil::ArrayList:0x5302b9f7>
irb(main):004:0>jprocs[0]
"1566 Jps"
irb(main):005:0>quit
exec jps
1567 Jps
1313
1543 LoaderLaunchStub
exec ls -l /Library/Frameworks/JRuby.framework/Versions/Current
lrwxr-xr-x  1 root  wheel  50 Jan 28 05:22 
/Library/Frameworks/JRuby.framework/Versions/Current -> 
/Library/Frameworks/JRuby.framework/Versions/1.7.2

(exec is of course Runtime exec, there are other commands).

Michael Hall

trz nio.2 for OS X http://www195.pair.com/mik3hall/index.html#trz

HalfPipe Java 6/7 shell app 
http://www195.pair.com/mik3hall/index.html#halfpipe

AppConverter convert Apple jvm to openjdk apps 
http://www195.pair.com/mik3hall/index.html#appconverter