Rails - Mar 2012 - HTTP Streaming with Ruby on Rails running with JRuby (on Tomcat)

Is there any way to utilize Rails HTTP Streaming, the conventional way 
provided in Ruby on Rails 3.1, with JRuby (running in Tomcat)?

I did not expect this to work, but I''ll post the error message anyway:

NameError (uninitialized constant 
ActionView::StreamingTemplateRenderer::Fiber):
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/actionpack-3.2.1/lib/action_view/renderer/streaming_template_renderer.rb:71:in
`delayed_render''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/actionpack-3.2.1/lib/action_view/renderer/abstract_renderer.rb:38:in
`instrument''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/activesupport-3.2.1/lib/active_support/notifications.rb:123:in
`instrument''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/activesupport-3.2.1/lib/active_support/notifications/instrumenter.rb:20:in
`instrument''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/activesupport-3.2.1/lib/active_support/notifications.rb:123:in
`instrument''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/actionpack-3.2.1/lib/action_view/renderer/abstract_renderer.rb:38:in
`instrument''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/actionpack-3.2.1/lib/action_view/renderer/streaming_template_renderer.rb:70:in
`delayed_render''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/actionpack-3.2.1/lib/action_view/renderer/streaming_template_renderer.rb:56:in
`render_template''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/actionpack-3.2.1/lib/action_view/renderer/streaming_template_renderer.rb:23:in
`call''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/actionpack-3.2.1/lib/action_view/renderer/streaming_template_renderer.rb:23:in
`each''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/rack-1.4.1/lib/rack/chunked.rb:23:in
`each''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/actionpack-3.2.1/lib/action_dispatch/http/response.rb:44:in
`send''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/actionpack-3.2.1/lib/action_dispatch/http/response.rb:44:in
`each''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/rack-1.4.1/lib/rack/body_proxy.rb:26:in
`send''
  
/path/to/tomcat/webapps/ROOT/WEB-INF/gems/gems/rack-1.4.1/lib/rack/body_proxy.rb:26:in
`method_missing''
  
file:/path/to/tomcat/webapps/ROOT/WEB-INF/lib/jruby-rack-1.1.4.jar!/jruby/rack/response.rb:103:in
`send''
  
file:/path/to/tomcat/webapps/ROOT/WEB-INF/lib/jruby-rack-1.1.4.jar!/jruby/rack/response.rb:103:in
`write_body''
  
file:/path/to/tomcat/webapps/ROOT/WEB-INF/lib/jruby-rack-1.1.4.jar!/jruby/rack/response.rb:50:in
`respond''


my controller looks like:
class ApplicationController < ActionController::Base
  def index
    render :stream => true 
  end
end


Thanks in advance for any pointers. Thanks again!

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this feature needs Fiber and that you have only with ruby 1.9.x, i.e.
you need to use jruby in 1.9 mode. there is options setting in jruby-
rack (or in warbler).

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On Friday, March 2, 2012 3:33:40 AM UTC-5, mkristian
wrote:
>
> this feature needs Fiber and that you have only with ruby 1.9.x, i.e. 
> you need to use jruby in 1.9 mode. there is options setting in jruby- 
> rack (or in warbler). 
>
Yes, just found that. This now works.

warble.rb:
Warbler::Config.new do |config|
# stuff before
   config.webxml.jruby.compat.version = "1.9"
# stuff after
end

In addition to the content, It spits out some random numbers and letters as 
it streams, but I guess I''ll find the answer for that in due time too
:)

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