jRuby allows a developer to run Ruby applications in a Java Virtual Machine. Adam Kalsey from Tropo explains why you'd want to do that, what jRuby can do for you, and show how Tropo uses jRuby in building a real-time communications cloud service. Includes how to deploy apps on jRuby, and some of the pitfalls to watch out for.

1. Tropo Adam Kalsey
www.Tropo.com akalsey@voxeo.com
@tropo @akalsey

3. http://www.flickr.com/photos/chefranden/

4. http://www.flickr.com/photos/malias/

5. http://www.flickr.com/photos/thatguyfromcchs08/

6. include Java
import java.lang.ArrayList
import javax.swing.JFrame
list = ArrayList.new
frame = JFrame.new("Ruby SWINGS!")
list << frame
list.each {|f| f.set_size(200,200) }

7. http://www.flickr.com/photos/yakobusan/

8. http://www.flickr.com/photos/thisisbossi/

9. include_class 'java.lang.String'

10. include_class('java.lang.String')
{|package,name| "J#{name}"}

11. 1. Download & unpack jRuby
2. ???
3. Profit

12. Demo Time

13. bin/gem install <package>

14. Demo Time

15. http://www.flickr.com/photos/oneaustin/

16. http://www.flickr.com/photos/underbiteman/

18. • Call • Say
• Answer • Ask
• Transfer • Record
• Reject • Conference
• Hangup

19. answer
say 'Yes, this works across
channels.'
hangup

20. Mozilla Rhino
Quercus
JRuby
Python
Jython

21. answer
options = { :choices => '1 (1,sales), 2 (2 support)' }
result = ask 'Hi. For sales, say Sales or press 1. For
support, say Support or press 2.', options
if result.name == 'choice'
case result.value
when '1'
say 'Your money is important to us.'
when '2'
say 'Your call will be ignored in the order received.'
end
end
hangup

22. def ask (ttsOrUrl, options={})
...
result = call.prompt(ttsOrUrl,
localOptions[:voice],
localOptions[:recognizer],
localOptions[:bargein],
localOptions[:grammar],
localOptions[:terminator],
localOptions[:choiceConfidence],
localOptions[:choiceMode],
localOptions[:timeout])
if (result.get('event.name'))
...

23. public Map<String, Object> prompt(final String ttsOrUrl,
final String ttsResourceName, ...) {
LOG.info(this + "->prompt("" + ttsOrUrl +
"", ... )");
Map<String, Object> retval = null;
try {
assertReady("prompt", Call.State.ANSWERED);
if (!Strings.isEmpty(termChar) && Strings.isEmpty
(grammar)) {
log("termChar with no grammar. Setting grammar to
equal termChar: " + termChar);
grammar = termChar;
termChar = null;
}
...

24. Call or SMS: (407) 374-9954
GTalk, XMPP: bartdemo@tropo.im
Twitter: @tropobart
http://github.com/voxeo/tropo-samples/

25. Tropo Adam Kalsey
www.Tropo.com akalsey@voxeo.com
@tropo @akalsey