Need to make `oj` work because of its runtime dependency on `boxr`.

[swapab]

Environment

• JRuby version :
  jruby 9.0.0.0 (2.2.2) 2015-07-21 e10ec96 Java HotSpot(TM) 64-Bit Server VM 25.65-b01 on 1.8.0_65-b17 +jit [linux-amd64]

• Operating system and platform

  ➜ trunk uname -a
  Linux swapnil-Lenovo-Z50-70 4.2.0-27-generic fix [JRUBY-5765]: cext build fails if 10.4 sdk installed #32-Ubuntu SMP Fri Jan 22 04:49:08 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

  ➜ trunk lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description: Ubuntu 15.10
  Release: 15.10
  Codename: wily

Relevant info:

• Gemfile, Gemfile.lock
• Application/framework version: rails 3.2.22.1
• Environment variables

This is not an issue, really. Just a situation.
I am using boxr to communicate with Box API.

boxr : I need oj. Runtime dependency you know.
jruby : Please Use alternatives(gson, json or json_pure instead)
boxr : I like Oj

Me : How can I make them both settle, so that everyone is happy ?

Error log:

Installing oj 2.12.9 with native extensions

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

/home/swapnil/.rvm/rubies/jruby-9.0.0.0/bin/jruby -r ./siteconf20160322-8577-urgrdc.rb extconf.rb

NotImplementedError: C extensions are not supported
at /home/swapnil/.rvm/rubies/jruby-9.0.0.0/lib/ruby/stdlib/mkmf.rb:1
require at org/jruby/RubyKernel.java:940
(root) at /home/swapnil/.rvm/rubies/jruby-9.0.0.0/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:1
at extconf.rb:1

extconf failed, exit code 1

Gem files will remain installed in /home/swapnil/.rvm/gems/jruby-9.0.0.0@JayApp/gems/oj-2.12.9 for inspection.
Results logged to /home/swapnil/.rvm/gems/jruby-9.0.0.0@JayApp/extensions/universal-java-1.8/2.2.0/oj-2.12.9/gem_make.out

[kares]

Swapnil, you have 2 options to make this work:

1. create a "native" (JRuby ext) backend for oj gem so it works the same on JRuby
2. avoid boxr direct dependending on oj (there used to be stuff such as multi_json which could maybe work with oj as the backend?)

NotImplementedError: C extensions are not supported won't go away - JRuby can not fix that.

[swapab]

Thanks @kares for the quick reply.

create a "native" (JRuby ext) backend for oj gem so it works the same on JRuby

Sounds exciting. Please excuse my knowledge in the native JRuby extension basics. But can you please guide me how to do that ?

avoid boxr direct dependending on oj (there used to be stuff such as multi_json which could maybe work with oj as the backend?)

This looks like an option I can try out. Make the json parser configurable in boxr itself (Oj/Multi_Json/) Again haven't tried this before will try though.

[kares]

there's lots of gems out there that work as described in 1. (they do release 2 platform speficic gems for MRI and JRuby e.g. nokogiri) just do some research. there's also https://github.com/jruby/jruby-examples ... thanks for helping out on making gems work on JRuby!

[enebo]

@kares @swapnilabnave I have in fact very infrequently been working on a native extension for oj. At this point I have most of the parsers ported but I am on the dumper (which is massive). Once the dumper is done I should be able to have a proper test run since results in tests require the dumper. At the point that is done I will try and merge it with oj assuming the author is happy.

[swapab]

Marvelous @enebo 👍 Looking forward to it 😃