putting some load on a tiny io-bound application

ruby-sockets/marco-polo/.gitignore

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+/*.sqlite3*

ruby-sockets/marco-polo/client.rb

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+require 'socket'
+
+loop do
+  TCPSocket.open('127.0.0.1', 22000) do |sock|
+    sock.send("sally #{rand(100)} #{rand(100)}\n", 0)
+    sock.recv(100)
+    sock.close
+    STDOUT.write('.')
+    STDOUT.flush
+  end
+end

ruby-sockets/marco-polo/em-server.rb

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+require 'eventmachine'
+require 'sequel'
+
+DB = Sequel.connect('sqlite://marco-polo.sqlite3')
+
+if DB[:locations].nil?
+  DB.create_table :locations do
+    primary_key :id
+    String :client
+    Integer :x
+    Integer :y
+  end
+end
+
+module MarcoPoloServer
+  def post_init
+    @locations = DB[:locations]
+  end
+
+  def receive_data(data)
+    client, x, y = data.split
+    @locations.insert(:client => client, :x => x.to_i, :y => y.to_i)
+    send_data("thanks\n")
+  rescue => e
+    STDERR.puts("#{e.class.name} #{e.message}: #{e.backtrace.join("\n")}")
+  end
+end
+
+EventMachine.run do
+  host, port = '0.0.0.0', 22000
+  EventMachine.start_server(host, port, MarcoPoloServer)
+  puts "Listening on #{host}:#{port}"
+end