Ruby-Band in Rails application

[tranhv]

Hi,

I would like to use ruby-band gem in rails app (ruby 2.1.3p242, Rails 4.2.1).
When i run by irb:

hvt@hvts-macpro:~/ck (master)$ irb
irb(main):001:0> require 'ruby-band'
LoadError: cannot load such file -- java
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:120:in `require'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:120:in `require'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/jbundler-0.4.3/lib/jbundler/pom.rb:24:in `<top (required)>'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:68:in `require'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:68:in `require'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/jbundler-0.4.3/lib/jbundler/gemfile_lock.rb:22:in `<top (required)>'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:68:in `require'

Version ruby-band in gem list: ruby-band (0.1.13)

What should i do?

Thanks,
Tran

[tranhv]

Hi,

The issue java load is resolved.
I have one new issue about ruby-band:

hvt@hvts-macpro:~/ck (master)$ ruby -v
ruby 2.1.3p242 (2014-09-19 revision 47630) [x86_64-darwin14.0]
hvt@hvts-macpro:~/ck (master)$ irb
irb(main):001:0> require 'ruby-band'
NameError: uninitialized constant JBundler::AetherRuby::NativeException
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/jbundler-0.4.3/lib/jbundler/aether.rb:59:in `rescue in initialize'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/jbundler-0.4.3/lib/jbundler/aether.rb:50:in `initialize'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/jbundler-0.4.3/lib/jbundler.rb:36:in `new'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/jbundler-0.4.3/lib/jbundler.rb:36:in `<top (required)>'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:68:in `require'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:68:in `require'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/ruby-band-0.1.13/lib/ruby-band.rb:3:in `<top (required)>'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:133:in `require'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:133:in `rescue in require'
    from /Users/hvt/.rbenv/versions/2.1.3/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:40:in `require'
    from (irb):1
    from /Users/hvt/.rbenv/versions/2.1.3/bin/irb:11:in `<main>'

Please help me.

Thanks,
Tran

[paulgoetze]

Hi @tranhv, ruby-band only works with JRuby. It looks like you are using C-Ruby.
There might be some other issues even on JRuby (see the current issues list for this project).

Also this project seems to be unmaintained.
You can try the weka gem which uses most of the ideas of ruby-band and should work with an up-to-date JRuby version.

In case you want to give the weka gem a try, I’ll be happy to help, if there are any issues popping up.