# Running Java from Rails **URL:** \ **Category:** ruby-talk\ **Created:** [12 February 2007 16:40 UTC](https://rubytalk.org/t/running-java-from-rails/35297 "2007-02-12T16:40:09Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Javier\_Vazquez](https://avatars.discourse-cdn.com/v4/letter/j/8dc957/32.png) [@Javier\_Vazquez](https://rubytalk.org/u/Javier_Vazquez)\ **Post date:** [12 February 2007 16:40 UTC](https://rubytalk.org/t/running-java-from-rails/35297/1 "2007-02-12T16:40:09Z")
Does anyone know of a possibility to run Java-Classes out of RoR (e.g. use java objects in a ruby context)? I'm a newbie regarding RoR coming from Java-Land and I'm asking myself if there's an easy way for me to code all the complex stuff in Java and use it in RoR. Thanx for your help! ---
**Author:** ![Drew\_Olson](https://avatars.discourse-cdn.com/v4/letter/d/c67d28/32.png) [@Drew\_Olson](https://rubytalk.org/u/Drew_Olson)\ **Post date:** [12 February 2007 16:47 UTC](https://rubytalk.org/t/running-java-from-rails/35297/2 "2007-02-12T16:47:45Z")
Javier\_CH wrote: > Does anyone know of a possibility to run Java-Classes out of RoR (e.g. > use java objects in a ruby context)? > > I'm a newbie regarding RoR coming from Java-Land and I'm asking myself > if there's an easy way for me to code all the complex stuff in Java > and use it in RoR. > > Thanx for your help! Coming from Java, let me tell you that coding the "complex stuff" in ruby is much nicer than coding it in Java IMO. Take the time to learn ruby and you will be extremely happy. -Drew > **···** > > -- > Posted via [http://www.ruby-forum.com/\](http://www.ruby-forum.com/%5C). ---
**Author:** ![Sammy\_Larbi](https://avatars.discourse-cdn.com/v4/letter/s/c67d28/32.png) [@Sammy\_Larbi](https://rubytalk.org/u/Sammy_Larbi)\ **Post date:** [12 February 2007 16:49 UTC](https://rubytalk.org/t/running-java-from-rails/35297/3 "2007-02-12T16:49:04Z")
I don't know if there is such a way, but I think that you'd be losing all the benefit of Ruby by doing the complex stuff (or anything, really) in Java. Javier\_CH wrote, On 2/12/2007 10:40 AM: > **···** > > > Does anyone know of a possibility to run Java-Classes out of RoR (e.g. > > use java objects in a ruby context)? > > > > I'm a newbie regarding RoR coming from Java-Land and I'm asking myself > > if there's an easy way for me to code all the complex stuff in Java > > and use it in RoR. > > > > Thanx for your help! ---
**Author:** ![Adam\_Keys](https://avatars.discourse-cdn.com/v4/letter/a/db5fbb/32.png) [@Adam\_Keys](https://rubytalk.org/u/Adam_Keys)\ **Post date:** [12 February 2007 17:07 UTC](https://rubytalk.org/t/running-java-from-rails/35297/4 "2007-02-12T17:07:22Z")
I'm using RJB[1] to call a Java RMI client that talks to our backend Java code. Working pretty well thus far. The maintainer is pretty response too. [1] [http://rjb.rubyforge.org/](http://rjb.rubyforge.org/) > **···** > > On Feb 12, 2007, at 10:40 AM, Javier\_CH wrote: > > > Does anyone know of a possibility to run Java-Classes out of RoR (e.g. > > use java objects in a ruby context)? > > > > I'm a newbie regarding RoR coming from Java-Land and I'm asking myself > > if there's an easy way for me to code all the complex stuff in Java > > and use it in RoR. > > -- > ~akk > > > **[Adam Keys is typing](https://therealadam.com/)** > > > > Developer and engineering manager at large ---
**Author:** ![Michael\_Guterl1](https://avatars.discourse-cdn.com/v4/letter/m/e47c2d/32.png) [@Michael\_Guterl1](https://rubytalk.org/u/Michael_Guterl1)\ **Post date:** [12 February 2007 18:25 UTC](https://rubytalk.org/t/running-java-from-rails/35297/5 "2007-02-12T18:25:31Z")
Hi, > Does anyone know of a possibility to run Java-Classes out of RoR (e.g. > use java objects in a ruby context)? Could this be something for JRuby? [http://jruby.codehaus.org](http://jruby.codehaus.org) I've not done anything with it, but looking at the site it seems like it may be possible. [http://jruby.codehaus.org/Java+Integration](http://jruby.codehaus.org/Java+Integration) I'm a newbie regarding RoR coming from Java-Land and I'm asking myself > **···** > > On 2/12/07, Javier\_CH \ wrote: > > > if there's an easy way for me to code all the complex stuff in Java > > and use it in RoR. > > > > Thanx for your help! > > -- > Michael Guterl ---
**Author:** ![Javier\_Vazquez](https://avatars.discourse-cdn.com/v4/letter/j/8dc957/32.png) [@Javier\_Vazquez](https://rubytalk.org/u/Javier_Vazquez)\ **Post date:** [12 February 2007 17:20 UTC](https://rubytalk.org/t/running-java-from-rails/35297/6 "2007-02-12T17:20:14Z")
You're right, but I think bytecode is probably faster then interpreted- code when it comes to performance. What have your experiences been? Second, we've a information retrieval project written in java (lucene) which I'd like to use and I don't think using it over a webservice is an option... Thanks for your replies. > **···** > > On 12 Feb., 17:47, Drew Olson \ wrote: > > > Coming from Java, let me tell you that coding the "complex stuff" in > > ruby is much nicer than coding it in Java IMO. Take the time to learn > > ruby and you will be extremely happy. ---
**Author:** ![Alex\_Young](https://avatars.discourse-cdn.com/v4/letter/a/ee7513/32.png) [@Alex\_Young](https://rubytalk.org/u/Alex_Young)\ **Post date:** [12 February 2007 17:37 UTC](https://rubytalk.org/t/running-java-from-rails/35297/7 "2007-02-12T17:37:56Z")
Thought I'd just weigh in here... Javier\_CH wrote: > > Coming from Java, let me tell you that coding the "complex stuff" in > > ruby is much nicer than coding it in Java IMO. Take the time to learn > > ruby and you will be extremely happy. > > You're right, but I think bytecode is probably faster then interpreted- > code when it comes to performance. What have your experiences been? Firstly, the chances are that it doesn't matter - developer speed beats cpu speed in general. Secondly, you're probably right, but benchmark it - don't guess. > Second, we've a information retrieval project written in java (lucene) > which I'd like to use and I don't think using it over a webservice is > an option... If you're interested in Lucene but don't need any of the Lucene-specific tools, it's really worth having a look at Ferret. It's a Lucene-alike written in C with Ruby bindings, and it's very, very good. Hope this helps 🙂 > **···** > > > On 12 Feb., 17:47, Drew Olson \ wrote: > > -- > Alex ---
**Author:** ![Richard\_Conroy1](https://avatars.discourse-cdn.com/v4/letter/r/57b2e6/32.png) [@Richard\_Conroy1](https://rubytalk.org/u/Richard_Conroy1)\ **Post date:** [12 February 2007 18:48 UTC](https://rubytalk.org/t/running-java-from-rails/35297/8 "2007-02-12T18:48:28Z")
> \> Coming from Java, let me tell you that coding the "complex stuff" in > \> ruby is much nicer than coding it in Java IMO. Take the time to learn > \> ruby and you will be extremely happy. > \> > You're right, but I think bytecode is probably faster then interpreted- > code when it comes to performance. What have your experiences been? This is premature optimisation. Which in engineering terms is a great way to ruin a project. Its not like Rails insists that everything is written in Rails/Ruby anyway. A lot of the CPU intensive stuff, like funky graphics stuff is typically handed over to binary stuff anyway. > Second, we've a information retrieval project written in java (lucene) > which I'd like to use and I don't think using it over a webservice is > an option... Well look at JRuby. It seems to be what you need, though it is a bit early to consider running a full Rails install on it. It just about runs Rails, which is probably a by-word for 'but not in a mission critical environment'. The JRuby guys are pretty sharp though, and I don't expect that situation to stay that way for long. > **···** > > On 2/12/07, Javier\_CH \ wrote: > > > On 12 Feb., 17:47, Drew Olson \ wrote: ---
**Author:** ![Jeremy\_McAnally1](https://avatars.discourse-cdn.com/v4/letter/j/eb8c5e/32.png) [@Jeremy\_McAnally1](https://rubytalk.org/u/Jeremy_McAnally1)\ **Post date:** [12 February 2007 17:44 UTC](https://rubytalk.org/t/running-java-from-rails/35297/9 "2007-02-12T17:44:55Z")
Or, optionally, Ruby can work with Solr, a Lucene based search service. [http://wiki.apache.org/solr/SolRuby](http://wiki.apache.org/solr/SolRuby) --Jeremy > **···** > > On 2/12/07, Alex Young \ wrote: > > > Thought I'd just weigh in here... > > > > Javier\_CH wrote: > > \> On 12 Feb., 17:47, Drew Olson \ wrote: > > \>\> Coming from Java, let me tell you that coding the "complex stuff" in > > \>\> ruby is much nicer than coding it in Java IMO. Take the time to learn > > \>\> ruby and you will be extremely happy. > > \>\> > > \> You're right, but I think bytecode is probably faster then interpreted- > > \> code when it comes to performance. What have your experiences been? > > Firstly, the chances are that it doesn't matter - developer speed beats > > cpu speed in general. Secondly, you're probably right, but benchmark it > > - don't guess. > > > > \> Second, we've a information retrieval project written in java (lucene) > > \> which I'd like to use and I don't think using it over a webservice is > > \> an option... > > If you're interested in Lucene but don't need any of the Lucene-specific > > tools, it's really worth having a look at Ferret. It's a Lucene-alike > > written in C with Ruby bindings, and it's very, very good. > > > > Hope this helps 🙂 > > > > -- > > Alex > > -- > [http://www.jeremymcanally.com/](http://www.jeremymcanally.com/) > > My free Ruby e-book: > [http://www.humblelittlerubybook.com/book/](http://www.humblelittlerubybook.com/book/) > > My blogs: > > > **[Site not found · DreamHost](http://www.mrneighborly.com/)** > > > > The owner of this domain has not yet uploaded their website. > > [http://www.rubyinpractice.com/](http://www.rubyinpractice.com/)