# Ruby to JRuby guide

**URL:** <https://www.ruby-forum.com/t/ruby-to-jruby-guide/115692>\
**Category:** Rails\
**Created:** [September 27, 2007, 6:22pm UTC](https://www.ruby-forum.com/t/ruby-to-jruby-guide/115692 "2007-09-27T18:22:01Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Marlon\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e9c0ed/32.png) [@Marlon\_M](https://www.ruby-forum.com/u/Marlon_M)\
**Post date:** [September 27, 2007, 6:22pm UTC](https://www.ruby-forum.com/t/ruby-to-jruby-guide/115692/1 "2007-09-27T18:22:01Z")

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Is there something available for developers that will show you how to  
migrate your rails app to JRuby. I’m referring to stuff like “If you  
use ImageMagick to resize your images, here’s how to do it with a java  
component” or “If you use ruby-net-ldap, here’s how you do it in java”

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**Author:** ![Marlon\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e9c0ed/32.png) [@Marlon\_M](https://www.ruby-forum.com/u/Marlon_M)\
**Post date:** [September 27, 2007, 9:41pm UTC](https://www.ruby-forum.com/t/ruby-to-jruby-guide/115692/2 "2007-09-27T21:41:52Z")

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On 9/27/07, Marlon M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> Is there something available for developers that will show you how to  
> migrate your rails app to JRuby. I’m referring to stuff like “If you  
> use ImageMagick to resize your images, here’s how to do it with a java  
> component” or “If you use ruby-net-ldap, here’s how you do it in java”

You should probably look at Ola B.'s JRuby on Rails book. Its out  
maybe a week now? Timely question.

RMagick is certainly the tricky one. But if you follow the JRuby wiki,  
you will notice that they have a plan to port a lot of the most  
popular MRI C-Extensions to JRuby (or at least get a lot of community  
contribution to achieve the same effect).