Problem with Eventmachine

Ruby JRuby
1

I’m trying to use the Juggernaut http://juggernaut.rubyforge.org/ gem
for a
project and would like to use JRuby. It depends on the JSON and
Eventmachine gems. The JSON gem uses a native extension, but they also
have
a pure ruby version so I changed Juggernaut to depend on the pure ruby
version instead which works fine now. But now I’m having a problem with
Eventmachine.
This is the exception I get when trying to access the Juggernaut server:

arthman:railpro jjathman$ jruby -S juggernaut -c juggernaut.yml
Starting Juggernaut server on port: 5001…
/Users/jjathman/jruby/lib/ruby/gems/1.8/gems/juggernaut-0.5.7/bin/…/lib/juggernaut/server.rb:369:in
client_ip': undefined method get_peername’ for EventMachine:Module
(NoMethodError)
from
/Users/jjathman/jruby/lib/ruby/gems/1.8/gems/juggernaut-0.5.7/bin/…/lib/juggernaut/server.rb:59:in
post_init' from /Users/jjathman/jruby/lib/ruby/gems/1.8/gems/eventmachine-0.12.6-java/lib/eventmachine.rb:1453:in new’
from
/Users/jjathman/jruby/lib/ruby/gems/1.8/gems/eventmachine-0.12.6-java/lib/eventmachine.rb:1446:in
instance_eval' from /Users/jjathman/jruby/lib/ruby/gems/1.8/gems/eventmachine-0.12.6-java/lib/eventmachine.rb:1446:in new’
from
/Users/jjathman/jruby/lib/ruby/gems/1.8/gems/eventmachine-0.12.6-java/lib/eventmachine.rb:1269:in
event_callback' from /Users/jjathman/jruby/lib/ruby/gems/1.8/gems/eventmachine-0.12.6-java/lib/jeventmachine.rb:49:in eventCallback’
from
/Users/jjathman/jruby/lib/ruby/gems/1.8/gems/eventmachine-0.12.6-java/lib/jeventmachine.rb:67:in
run_machine' from /Users/jjathman/jruby/lib/ruby/gems/1.8/gems/eventmachine-0.12.6-java/lib/eventmachine.rb:240:in run’
from
/Users/jjathman/jruby/lib/ruby/gems/1.8/gems/juggernaut-0.5.7/bin/…/lib/juggernaut/runner.rb:72:in
start' from /Users/jjathman/jruby/lib/ruby/gems/1.8/gems/juggernaut-0.5.7/bin/../lib/juggernaut/runner.rb:48:in initialize’
from
/Users/jjathman/jruby/lib/ruby/gems/1.8/gems/juggernaut-0.5.7/bin/…/lib/juggernaut/runner.rb:11:in
run' from /Users/jjathman/jruby/lib/ruby/gems/1.8/gems/juggernaut-0.5.7/bin/juggernaut:4 from /Users/jjathman/jruby/lib/ruby/gems/1.8/gems/juggernaut-0.5.7/bin/juggernaut:19:in load’
from /Users/jjathman/jruby/bin/juggernaut:19

But from what I can see it sure looks like there is a get_peername
method
defined in the JRuby version of the event machine gem. Anyone have any
ideas what’s going on? Thanks.

Joe

2

On May 9, 2009, at 9:05 AM, Joseph A. wrote:

arthman:railpro jjathman$ jruby -S juggernaut -c juggernaut.yml
Starting Juggernaut server on port: 5001…
/Users/jjathman/jruby/lib/ruby/gems/1.8/gems/juggernaut-0.5.7/bin/…/
lib/juggernaut/server.rb:369:in client_ip': undefined methodget_peername’ for EventMachine:Module (NoMethodError)

You are using the pure ruby eventmachine reactor since you don't have the java reactor built. If you installed as a gem, go to your eventmachine gem directory and run 'rake build:java' so that the proper jars get built and installed. Then try again. (Make sure you run "sudo " if your gems are installed as root.)

cr

3

Thanks for the tip, but this didn’t seem to help, still get the same
exception. From what I can see I don’t think this is a problem with the
Java part of the gem. It looks like the EventMachine::Connection class
does
define the “get_peername” method, I don’t understand why I’m getting the
NoMethodError. It’s defined in eventmachine.rb on line 1765.
Joe

4

On May 9, 2009, at 10:39 AM, Joseph A. wrote:

Thanks for the tip, but this didn’t seem to help, still get the same
exception. From what I can see I don’t think this is a problem with
the Java part of the gem. It looks like the
EventMachine::Connection class does define the “get_peername”
method, I don’t understand why I’m getting the NoMethodError. It’s
defined in eventmachine.rb on line 1765.

Weird, my eventmachine.rb file is only 1622 lines long.

Anyway, I looked a little closer at this. There is a #get_peername
method defined in the pure ruby reactor and in the C reactor. I
searched for “peername” and found this comment in the java source.

public final void testBindConnect() throws IOException {
class Server extends Connection {
public void postInit() {
// TODO: get peername here and check if the port is 33333
// doesnt seem like peername is impl yet?
System.out.println(“post init!”);
}
};
…

So, there is no #get_peername defined in the java reactor yet. I
suggest going to rubyeventmachine.com and filing a bug. You might also
want to join the eventmachine mailing list since this is an
eventmachine-specific issue and doesn’t have much to do with jruby.

In the interim, force jruby to use the pure ruby version of the
reactor and you might get a bit further.

cr

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