I am using Eclipse and Maven for a number of Java projects. For our development we use "Run Jetty Run" to launch a Jetty servlet really quickly. I'd like to use this combo for JRuby + Rails development - leveraging many of the benefits of these tools that I've worked hard on learning. 0 - Initial Setup * create a test project * create a test rails app * create a pom.xml in your test project 1 - Run Jetty Run If you don't have it and want to try - you can add the site (and install) to your Eclipse feature sites http://run-jetty-run.googlecode.com/svn/trunk/updatesite 2 - Maven I'm going to assume that you're familiar with Maven. What I've determined you'll need at a minimum is the following additional dependencies: <pre> <dependency> <groupId>org.jruby</groupId> <artifactId>jruby</artifactId> <version>1.1</version> </dependency> <dependency> <groupId>org.jruby.extras</groupId> <artifactId>goldspike</artifactId> <version>1.6</version> </dependency> </pre> 3 - Setting up your webapp Create a directory "src/main/webapp/WEB-INF" if necessary Create a [[Editing Rails Eclipse Jetty Maven web.xml|web.xml ]] web.xml file 4 - Copy (symlink) over your Rails app. I'd prefer to put it into a subdirectory rather than just toss into the webapp dir. So make a subdir like "WEB-INF/rails" and toss your entire rails app in there. You can change the name of this directory in the web.xml file - look for "rails.root" So you'll have a directory structure like: src/main/webapp/WEB-INF/rails/app src/main/webapp/WEB-INF/rails/config src/main/webapp/WEB-INF/rails/db etc. plus src/main/webapp/WEB-INF/web.xml 5 - Adding your gems Put them in "src/main/webapp/WEB-INF/gems". Make sure this directory exists before using the commands: cd src/main/webapp/WEB-INF gem install rails --install-dir=gems --no-rdoc --no-ri gem install activerecord-jdbc-adapter --install-dir=gems --no-rdoc --no-ri plus add your own 6 - Create your Run Jetty Run configuration * Open Eclipse's Run Dialog * Add a new "Jetty Webapp" ** Set the project to this ''Test Project'' ** Set the context to something you like like ''jrails'' ** Set the WebApp dir to "src/main/webapp" * Apply * Run 7 - You should be able to point your browser to http://localhost:8080/jrails/ 8 - Watch your console - debug ad naseum - amend these instructions 9 - Use Maven to make your WAR file when ready mvn clean war:exploded or mvn clean war:war ''I just figured this out - so I haven't used the config extensively. As I discover more things I will come back and put in debugging tips.''