Class: KineticRuby::Server

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(port = DEFAULT_KINETIC_PORT, log_level = Logger::LOG_LEVEL_INFO) ⇒ Server

Returns a new instance of Server.



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# File 'lib/kinetic_server.rb', line 14

def initialize(port = DEFAULT_KINETIC_PORT, log_level=Logger::LOG_LEVEL_INFO)
  @host = 'localhost'
  @port ||= DEFAULT_KINETIC_PORT
  raise "Invalid Kinetic test server port specified (port: #{port})" if !@port || @port < 0
  @logger = Logger.new(log_level)
  @proto = Proto.new(@logger)
  @server = nil
  @worker = nil
  @clients = []
  @logger.log "Kinetic Ruby test device server started!"
end

Instance Attribute Details

#connected ⇒ Object (readonly)

Returns the value of attribute connected.



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# File 'lib/kinetic_server.rb', line 12

def connected
  @connected
end

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/kinetic_server.rb', line 12

def host
  @host
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/kinetic_server.rb', line 12

def port
  @port
end

Instance Method Details

#report_buffer(buf) ⇒ Object 



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# File 'lib/kinetic_server.rb', line 30

def report_buffer(buf)
  bytes = buf.bytes
  row_len = 16
  @logger.log "Raw Data (length=#{buf.count}):"
  while !bytes.empty?
    row_len = bytes.count >= row_len ? row_len : bytes.count
    @logger.log "  row_len: #{row_len}"
    row = bytes.slice!(row_len)
    @logger.log "  row: #{row.inspect}"
    msg = "  "
    row.each do |b|
      msg += sprintf("0x%02X", b)
    end
    @logger.log msg
  end
  report
end

#shutdown ⇒ Object 



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# File 'lib/kinetic_server.rb', line 133

def shutdown
  return if @server.nil?
  @logger.log "Kinetic Test Server: shutting down..."
  if @worker
    @worker.exit
    @worker.join(2)
    @worker = nil
  end
  if @server
    @server.close
    @server = nil
  end
  @logger.log "Kinetic Test Server: shutdown complete"
end

#start ⇒ Object 



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# File 'lib/kinetic_server.rb', line 48

def start
  return unless @server.nil?

  @server = TCPServer.new(@host, @port)

  # Setup handler for signaled shutdown (via ctrl+c)
  trap("INT") do
    @logger.log "Kinetic Test Server: INT triggered Kintic Test Server shutdown"
    shutdown
  end

  # Create worker thread for test server to run in so we can continue
  @worker = Thread.new do
    @logger.log "Kinetic Test Server: Listening for Kinetic clients..."
    loop do
      client = nil
      begin
        client, client_info = @server.accept
      rescue Exception => e
        @logger.log "Kinetic Test Server: EXCEPTION during accept!\n" +
          "  #{e.inspect}\n" +
          "  #{e.message}\n  #{e.backtrace.join("  \n")}"
        next if client.nil?
      end

      next if client.nil?

      @logger.log "Kinetic Test Server: Connected to #{client.inspect}"
      request = ''
      data = nil
      pdu = nil
      disconnect = false

      while !disconnect
        begin
          data = client.recv(1024)
        rescue IO::WaitReadable
          @logger.log("IO:WaitReadable");
          IO.select([client])
          retry
        rescue Exception => e
          @logger.logv "Kinetic Test Server: EXCEPTION during receive!\n" +
            "  #{e.inspect}\n" +
            "  #{e.message}\n  #{e.backtrace.join("  \n")}"
          disconnect = true
          next
        end

        if (data.nil? || data.empty?)
          @logger.log "Kinetic Test Server: Client #{client.inspect} disconnected!"
          disconnect = true
          next
        end

        # Incrementally parse PDU until complete
        if request[0] == KineticRuby::Proto::VERSION_PREFIX && request.length >= 9
          pdu ||= PDU.new(@Logger)
          pdu.update(request)
        end

        # Otherwise, handle custom test requests
        if pdu.nil?
          request_match = request.match(/^read\((\d+)\)/)
          if request_match
            len = request_match[1].to_i
            response = 'G'*len
            @logger.log "Kinetic Test Server: Responding to 'read(#{len})' w/ '#{response}'"
            client.write response
            request = ''
          elsif request =~ /^readProto()/
            response = @proto.test_encode
            @logger.log "Kinetic Test Server: Responding to 'read(#{len})' w/ dummy @protobuf (#{response.length} bytes)"
            client.write response
            request = ''
          end
        end

        @logger.log "Kinetic Test Server: Client #{client.inspect} disconnected!"
        client.close
        @logger.log "Kinetic Test Server: Client connection shutdown successfully"
      end
    end
  end
end