jruby

I'd like to be able to compile a ruby program to a java JAR program. I've looked into JRuby and seen several examples of Java applications that would be able to eval() ruby code, but is there a more elegant solution allowing to simply code everything in ruby and then compile the lot directly to a JAR file? The overall goal behind that is to be able to extend a security tool called Burp Proxy. So I'd like to be able to use all my Ruby pentesting scripts (obviously organising them so they interface with Burp extender) and compile my plugins to JAR file that can be executed by the tool. If you

while using Jruby, i get this message. Complete Java stackTrace java.lang.OutOfMemoryError: Java heap space how to resolve ? TLDR: jruby -J-Xmx1024m script_you_want_to_run.rb As others have mentioned, your program is trying to allocate more memory than the max size the JVM is allowed to allocate. Also as others have mentioned, you can configure Java to allow more memory allocation by telling it via the command line with the argument -Xmx1024m (as an example). -Xmx is the argument for max memory, and the 1024m would be the memory size (the final m for megabytes). I think JRuby starts the JVM

Here is the only way I know to ask it at the moment. As Understand it Scala uses the Java Virtual Machine. I thought Jruby did also. Twitter switched its middleware to Scala. Could they have done the same thing and used Jruby? Could they have started with Jruby to start with and not had their scaling problems that caused them to move from Ruby to Scala in the first place? Do I not understand what Jruby is? I'm assuming that because Jruby can use Java it would have scaled where Ruby would not. Does it all boil down to the static versus dynamic types, in this case? Scala is "scalable" in the

I am using Jruby and rails 2.2.2. My problem is I have a migration that is not being correctly written to the database schema. Here is my migration: class CreateNotes < ActiveRecord::Migration def self.up create_table(:notes, :options => 'ENGINE=MyISAM') do |t| t.string :title t.text :body t.timestamps end execute "alter table notes ADD FULLTEXT(title, body)" end Here is what it produces on in schema.rb create_table "notes", :force => true do |t| t.string "title" t.text "body" t.datetime "created_at" t.datetime "updated_at" end add_index "notes", ["title", "body"], :name => "title" I have two

I'm looking to run some un-verified scripts (written in a yet-to-be-determined language, but needs to be Java-based, so JRuby, Groovy, Jython, BeanShell, etc are all candidates). I want these scripts to be able to do some things and restricted from doing other things. Normally, I'd just go use Java's SecurityManager and be done with it. That's pretty simple and lets me restrict file and network access, the ability to shutdown the JVM, etc. And that will work well for the high level stuff I want to block off. But there is some stuff I want to allow, but only via my custom API/library that I've

I'm looking to try out JRuby and JRuby on Rails. I'm having trouble finding information on what's difference between JRuby on Rails and Ruby on Rails. What's the differences I need to look out for? user23117 JRuby is the Ruby implementation that runs on a JVM whereas Matz's Ruby is a C implementation. Key features to note are: JRuby runs on Java VM's and it's either compiled or interpreted down to Java byte code. JRuby can integrate with Java code. If you have Java class libraries (.jar's), you can reference and use them from within Ruby code with JRuby. In the other direction you can also

I'm trying to use JRuby (through the JSR233 interface included in JRuby 1.5) from a Java application to load a ruby implementation of a Java interface. My sample implementation looks like this: Interface: package some.package; import java.util.List; public interface ScriptDemoIf { int fibonacci(int d); List<String> filterLength(List<String> source, int maxlen); } Ruby Implementation: require 'java' include Java class ScriptDemo java_implements some.package.ScriptDemoIf java_signature 'int fibonacci(int d)' def fibonacci(d) d < 2 ? d : fibonacci(d-1) + fibonacci(d-2) end java_signature 'List