Class: Mjai::TCPGameServer

Inherits:
Object
  • Object
show all
Defined in:
lib/mjai/tcp_game_server.rb

Direct Known Subclasses

TCPActiveGameServer

Defined Under Namespace

Classes: LocalError

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(params) ⇒ TCPGameServer

Returns a new instance of TCPGameServer.



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# File 'lib/mjai/tcp_game_server.rb', line 17

def initialize(params)
  @params = params
  @server = TCPServer.open(params[:host], params[:port])
  @players = []
  @mutex = Mutex.new()
  @num_finished_games = 0
end

Instance Attribute Details

#num_finished_games ⇒ Object (readonly)

Returns the value of attribute num_finished_games.



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# File 'lib/mjai/tcp_game_server.rb', line 25

def num_finished_games
  @num_finished_games
end

#params ⇒ Object (readonly)

Returns the value of attribute params.



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# File 'lib/mjai/tcp_game_server.rb', line 25

def params
  @params
end

#players ⇒ Object (readonly)

Returns the value of attribute players.



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# File 'lib/mjai/tcp_game_server.rb', line 25

def players
  @players
end

Instance Method Details

#port ⇒ Object 



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# File 'lib/mjai/tcp_game_server.rb', line 145

def port
  return @server.addr[1]
end

#print_backtrace(ex, io = $stderr) ⇒ Object 



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# File 'lib/mjai/tcp_game_server.rb', line 163

def print_backtrace(ex, io = $stderr)
  io.printf("%s: %s (%p)\n", ex.backtrace[0], ex.message, ex.class)
  for s in ex.backtrace[1..-1]
    io.printf("        %s\n", s)
  end
end

#process_one_game ⇒ Object 



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# File 'lib/mjai/tcp_game_server.rb', line 96

def process_one_game()
  
  game = nil
  success = false
  begin
    (game, success) = play_game(@players)
  rescue => ex
    print_backtrace(ex)
  end
  
  begin
    for player in @players
      player.close()
    end
  rescue => ex
    print_backtrace(ex)
  end
  
  begin
    for pid in @pids
      Process.waitpid(pid)
    end
  rescue => ex
    print_backtrace(ex)
  end
  
  @num_finished_games += 1
  
  if success
    on_game_succeed(game)
  else
    on_game_fail(game)
  end
  puts()
  
  @pids = []
  @players = []
  if @num_finished_games >= @params[:num_games]
    exit()
  else
    start_default_players()
  end
  
end

#run ⇒ Object 



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# File 'lib/mjai/tcp_game_server.rb', line 27

def run()
  puts("Listening on host %s, port %d" % [@params[:host], self.port])
  puts("URL: %s" % self.server_url)
  puts("Waiting for %d players..." % self.num_tcp_players)
  @pids = []
  begin
    start_default_players()
    while true
      Thread.new(@server.accept()) do |socket|
        error = nil
        begin
          socket.sync = true
          socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
          send(socket, {
              "type" => "hello",
              "protocol" => "mjsonp",
              "protocol_version" => 3,
          })
          line = socket.gets()
          if !line
            raise(LocalError, "Connection closed")
          end
          puts("server <- player ?\t#{line}")
          message = JSON.parse(line)
          if message["type"] != "join" || !message["name"] || !message["room"]
            raise(LocalError, "Expected e.g. %s" %
                JSON.dump({"type" => "join", "name" => "noname", "room" => @params[:room]}))
          end
          if message["room"] != @params[:room]
            raise(LocalError, "No such room. Available room: %s" % @params[:room])
          end
          @mutex.synchronize() do
            if @players.size >= self.num_tcp_players
              raise(LocalError, "The room is busy. Retry after a while.")
            end
            @players.push(TCPPlayer.new(socket, message["name"]))
            puts("Waiting for %s more players..." % (self.num_tcp_players - @players.size))
            if @players.size == self.num_tcp_players
              Thread.new(){ process_one_game() }
            end
          end
        rescue JSON::ParserError => ex
          error = "JSON syntax error: %s" % ex.message
        rescue SystemCallError => ex
          error = ex.message
        rescue LocalError => ex
          error = ex.message
        end
        if error
          begin
            send(socket, {"type" => "error", "message" => error})
            socket.close()
          rescue SystemCallError
          end
        end
      end
    end
  rescue Exception => ex
    for pid in @pids
      begin
        Process.kill("INT", pid)
      rescue => ex2
        p ex2
      end
    end
    raise(ex)
  end
end

#send(socket, hash) ⇒ Object 



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# File 'lib/mjai/tcp_game_server.rb', line 157

def send(socket, hash)
  line = JSON.dump(hash)
  puts("server -> player ?\t#{line}")
  socket.puts(line)
end

#server_url ⇒ Object 



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# File 'lib/mjai/tcp_game_server.rb', line 141

def server_url
  return "mjsonp://localhost:%d/%s" % [self.port, @params[:room]]
end

#start_default_players ⇒ Object 



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# File 'lib/mjai/tcp_game_server.rb', line 149

def start_default_players()
  for command in @params[:player_commands]
    command += " " + self.server_url
    puts(command)
    @pids.push(fork(){ exec(command) })
  end
end