diff --git a/sylvilagus/jruby/Gemfile b/sylvilagus/jruby/Gemfile
new file mode 100644
index 0000000..d2152b6
--- /dev/null
+++ b/sylvilagus/jruby/Gemfile
@@ -0,0 +1,5 @@
+source :rubygems
+
+group :development, :test do
+  gem 'rspec'
+end
diff --git a/sylvilagus/jruby/Gemfile.lock b/sylvilagus/jruby/Gemfile.lock
new file mode 100644
index 0000000..b83e6c3
--- /dev/null
+++ b/sylvilagus/jruby/Gemfile.lock
@@ -0,0 +1,18 @@
+GEM
+  remote: http://rubygems.org/
+  specs:
+    diff-lcs (1.1.3)
+    rspec (2.12.0)
+      rspec-core (~> 2.12.0)
+      rspec-expectations (~> 2.12.0)
+      rspec-mocks (~> 2.12.0)
+    rspec-core (2.12.0)
+    rspec-expectations (2.12.0)
+      diff-lcs (~> 1.1.3)
+    rspec-mocks (2.12.0)
+
+PLATFORMS
+  java
+
+DEPENDENCIES
+  rspec
diff --git a/sylvilagus/jruby/lib/sylvilagus.rb b/sylvilagus/jruby/lib/sylvilagus.rb
new file mode 100644
index 0000000..6174b76
--- /dev/null
+++ b/sylvilagus/jruby/lib/sylvilagus.rb
@@ -0,0 +1,2 @@
+module Sylvilagus
+end
diff --git a/sylvilagus/jruby/lib/sylvilagus/ch04.rb b/sylvilagus/jruby/lib/sylvilagus/ch04.rb
new file mode 100644
index 0000000..eb9a071
--- /dev/null
+++ b/sylvilagus/jruby/lib/sylvilagus/ch04.rb
@@ -0,0 +1,4 @@
+module Sylvilagus
+  module Ch04
+  end
+end
diff --git a/sylvilagus/jruby/lib/sylvilagus/ch04/alert_producer.rb b/sylvilagus/jruby/lib/sylvilagus/ch04/alert_producer.rb
new file mode 100644
index 0000000..af72dc8
--- /dev/null
+++ b/sylvilagus/jruby/lib/sylvilagus/ch04/alert_producer.rb
@@ -0,0 +1,63 @@
+require 'sylvilagus/init'
+require 'sylvilagus/ch04'
+require 'optparse'
+require 'rabbitmq-client.jar'
+require 'gson.jar'
+import com.rabbitmq.client.ConnectionFactory
+import com.google.gson.Gson
+
+class Sylvilagus::Ch04::AlertProducer
+  def main
+    opts = {}
+    OptionParser.new do |opts|
+      opts.on('-r', '--routing-key=',
+              'Routing key for message (e.g. myalert.im)') do |r|
+        opts[:routing_key] = r
+      end
+      opts.on('-m', '--message=', 'Message text for alert.') do |m|
+        opts[:message] = m
+      end
+    end.parse!
+
+    factory = ConnectionFactory.new
+    factory.uri = ENV.fetch('SYLVILAGUS_ALERT_AMQP_URI')
+    @conn = factory.new_connection
+    puts "Made it! conn=#{@conn}"
+    channel = @conn.create_channel
+
+    gson = Gson.new
+    puts gson.to_json({'wat' => 'now?', 'huh' => [1, 2, 3]})
+
+  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