Bruno Ghisi's Blog

My First JRuby Bluetooth App

• Download Netbeans IDE 6 (Select All package version, because it comes with Java and Ruby).
• Get marge-core in Marge repository (you can use Netbeans to checkout from Subversion and generate a jar, because the last version is under development and was not launched yet, we are working on it :) ). Otherwise download the last launched version (0.4.0) and fix the inquiry method.
• Get a JSR 82 implementation, I have used Avetana for Linux. I have explained it in another post, you can take a look here.

1. Create a Ruby Project: File -> New Project -> Ruby -> Ruby Application. Click Next, configure your project (create a main.rb file and use a JRuby interpreter) and then click Finish.
2. Add marge-core and Avetana. Right click in the project -> Properties -> Java and then add the jars in the JRuby classpath.
3. Add the following code into main.rb. The code is pretty intuitive, because Ruby is! It basically imports some Marge classes (that are going to use Avetana internally), defines a listener that will be called during the inquiry and will print all the devices found. Also, the inquiry will be started by the singleton DeviceDiscoverer.



include Java

include_class 'net.java.dev.marge.inquiry.DeviceDiscoverer'
include_class 'net.java.dev.marge.inquiry.InquiryListener'

puts 'Inquiring for Bluetooth Devices'
discoverer = DeviceDiscoverer.instance;

class InquiryListenerAppender 
    include InquiryListener
  def inquiryCompleted(remoteDevices)
    remoteDevices.each { |device| print "#{device.bluetooth_address} - #{device.get_friendly_name true} \n"  }
  end
  def inquiryError
    puts 'Inquiry Error'
  end
  def deviceDiscovered(device,deviceClass)
  end
end

discoverer.start_inquiry_giac InquiryListenerAppender.new

Comments

• ruby is really fantastic! easy to programming, fexible...

  nice to see how easy is use jruby... I don't try it yet...next step!!

  cheers

  Posted by: pedrobachiega on February 01, 2008 at 08:30 AM

This work is licensed under a Creative Commons License.