TOTD #87: How to fix the error undefined method `new' for "Rack::Lock":String caused by Warbler/JRuby-Rack ?

This is a known issue as reported at href="http://jira.codehaus.org/browse/JRUBY-3789">JRUBY-3789
and JRUBY_RACK-18.



As the bug report indicates, this is actually an issue with
jruby-rack-0.9.4 and is fixed in jruby-rack-0.9.5. The 3-step
workaround is described href="http://stufftohelpyouout.blogspot.com/2009/06/how-to-get-warbler-to-include-custom.html">here
and explained below for convenience:

1. Do "warble war:clean" to clean up the .war file and staging
   area. This basically removes previous version of jruby-rack.jar.
2. Download the latest href="http://snapshots.repository.codehaus.org/org/jruby/rack/jruby-rack/0.9.5-SNAPSHOT/">jruby-rack-0.9.5
   snapshot ( href="http://snapshots.repository.codehaus.org/org/jruby/rack/jruby-rack/0.9.5-SNAPSHOT/">complete
   list) and copy in the "lib" directory of your application.
3. If "config/warble.rb" does not exist then generate it using
   "jruby -S config warble". Edit "config/warble.rb" such that it looks
   like:
   
   
   
   style="text-align: left; background-color: rgb(204, 204, 255); width: 100%;"
   cellpadding="2" cellspacing="2">
     # Additional Java .jar files to include.
   Note that if .jar files are placed
   
     # in lib (and not otherwise excluded) then they need not be
   mentioned here.
   
     # JRuby and JRuby-Rack are pre-loaded in this list. Be sure
   to include your
   
     # own versions if you directly set the value
   
     # config.java_libs += FileList["lib/java/*.jar"]
   
     config.java_libs.delete_if {|f| f =~ /jruby-rack/ }
   
     config.java_libs += FileList["lib/jruby-rack*.jar"]

   
   
   This will pack jruby-rack-0.9.5 snapshot instead of the one bundled
   with Warbler.
   
   
   
   Now warbler 1.0.0 bundles "jruby-complete-1.3.0RC1.jar". Optionally,
   you can also download the latest jruby-complete ( href="http://dist.codehaus.org/jruby/1.3.1/jruby-complete-1.3.1.jar">jruby-complete-1.3.1.jar
   as of this writing) and copy in the "lib" directory of your
   application. In that case, modify the above fragment to:
   
   
   

   style="text-align: left; background-color: rgb(204, 204, 255); width: 100%;"
   cellpadding="2" cellspacing="2">
     # Additional Java .jar files to include.
   Note that if .jar files are placed
   
     # in lib (and not otherwise excluded) then they need not be
   mentioned here.
   
     # JRuby and JRuby-Rack are pre-loaded in this list. Be sure
   to include your
   
     # own versions if you directly set the value
   
     # config.java_libs += FileList["lib/java/*.jar"]
   
     config.java_libs.delete_if {|f| f =~ /jruby-rack/ || f =~
   /jruby-complete/ }
   
     config.java_libs += FileList["lib/jruby-complete*.jar"]
   
     config.java_libs += FileList["lib/jruby-rack*.jar"]

   
   
   This packs the "jruby-complete-1.3.1.jar" in your .war file.

And now follow your regular procedure of creating the .war file using
"jruby -S warble" and happily deploy your Rails/ href="http://blogs.sun.com/arungupta/entry/totd_80_sinatra_crud_application">Sintara/ href="http://blogs.sun.com/arungupta/entry/lotd_15_deploying_merb_application">Merb
applications on GlassFish.



There are several users who are already using Rails on GlassFish in
production environment and they are listed at href="http://blogs.sun.com/arungupta/tags/rubyonrails+glassfish+stories">rubyonrails+glassfish+stories.
Drop a comment on this blog if you are using it too :)



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