diff --git a/sylvilagus/jruby/Gemfile b/sylvilagus/jruby/Gemfile
index d2152b6..5d130ae 100644
--- a/sylvilagus/jruby/Gemfile
+++ b/sylvilagus/jruby/Gemfile
@@ -1,5 +1,7 @@
 source :rubygems
 
+gem 'json_pure'
+
 group :development, :test do
   gem 'rspec'
 end
diff --git a/sylvilagus/jruby/Gemfile.lock b/sylvilagus/jruby/Gemfile.lock
index b83e6c3..55a40f8 100644
--- a/sylvilagus/jruby/Gemfile.lock
+++ b/sylvilagus/jruby/Gemfile.lock
@@ -2,6 +2,7 @@ GEM
   remote: http://rubygems.org/
   specs:
     diff-lcs (1.1.3)
+    json_pure (1.7.5)
     rspec (2.12.0)
       rspec-core (~> 2.12.0)
       rspec-expectations (~> 2.12.0)
@@ -15,4 +16,5 @@ PLATFORMS
   java
 
 DEPENDENCIES
+  json_pure
   rspec
diff --git a/sylvilagus/jruby/lib/sylvilagus/ch04/alert_producer.rb b/sylvilagus/jruby/lib/sylvilagus/ch04/alert_producer.rb
index af72dc8..6c3dd3b 100644
--- a/sylvilagus/jruby/lib/sylvilagus/ch04/alert_producer.rb
+++ b/sylvilagus/jruby/lib/sylvilagus/ch04/alert_producer.rb
@@ -1,63 +1,49 @@
 require 'sylvilagus/init'
 require 'sylvilagus/ch04'
 require 'optparse'
+require 'json'
 require 'rabbitmq-client.jar'
-require 'gson.jar'
-import com.rabbitmq.client.ConnectionFactory
-import com.google.gson.Gson
 
 class Sylvilagus::Ch04::AlertProducer
   def main
-    opts = {}
+    options = {}
     OptionParser.new do |opts|
-      opts.on('-r', '--routing-key=',
+      opts.on('-rROUTING_KEY', '--routing-key=ROUTING_KEY',
               'Routing key for message (e.g. myalert.im)') do |r|
-        opts[:routing_key] = r
+        options[:routing_key] = r
       end
-      opts.on('-m', '--message=', 'Message text for alert.') do |m|
-        opts[:message] = m
+      opts.on('-mMESSAGE', '--message=MESSAGE',
+              'Message text for alert.') do |m|
+        options[:message] = m
       end
     end.parse!
 
-    factory = ConnectionFactory.new
+    unless options[:message] && options[:routing_key]
+      STDERR.puts 'Need both message and routing_key!'
+      exit 1
+    end
+
+    factory = Java::ComRabbitmqClient::ConnectionFactory.new
     factory.uri = ENV.fetch('SYLVILAGUS_ALERT_AMQP_URI')
     @conn = factory.new_connection
-    puts "Made it! conn=#{@conn}"
     channel = @conn.create_channel
+    channel.exchange_declare('alerts', 'topic', true, false, false, nil)
+
+    props = Java::ComRabbitmqClient::AMQP::BasicProperties.new
+    props.content_type = 'application/json'
 
-    gson = Gson.new
-    puts gson.to_json({'wat' => 'now?', 'huh' => [1, 2, 3]})
+    json_msg = JSON.dump({'message' => options[:message]})
+    channel.basic_publish('alerts', options[:routing_key],
+                          true, true, props, json_msg.to_java_bytes)
 
+    puts "Sent message #{json_msg.inspect} tagged " <<
+         "with routing key #{options[:routing_key].inspect} to " <<
+         'exchange "alerts" on vhost "/".'
   ensure
     @conn.close if @conn
   end
 end
 
-#     creds_broker = pika.PlainCredentials('alert_user', 'alertme')
-#     conn_params = pika.ConnectionParameters('localhost',
-#                                             virtual_host='/',
-#                                             credentials=creds_broker)
-#     conn_broker = pika.BlockingConnection(conn_params)
-#
-#     channel = conn_broker.channel()
-#
-#     msg = json.dumps({'message': args.message})
-#     msg_props = pika.BasicProperties()
-#     msg_props.content_type = 'application/json'
-#     msg_props.durable = False
-#
-#     channel.basic_publish(body=msg,
-#                           exchange='alerts',
-#                           properties=msg_props,
-#                           routing_key=args.routing_key)
-#
-#     print(
-#         ('Sent message {} tagged with routing key {!r} to ' +
-#          'exchange "alerts" on vhost "/".').format(msg, args.routing_key)
-#     )
-#
-#     conn_broker.close()
-
 if $0 == __FILE__
   Sylvilagus::Ch04::AlertProducer.new.main
 end