Class: NATSD::Route

Inherits:
EventMachine::Connection
  • Object
show all
Includes:
Connection
Defined in:
lib/nats/server/route.rb

Overview

Need to make this a class with EM > 1.0

Instance Attribute Summary collapse

Attributes included from Connection

#cid, #in_bytes, #in_msgs, #last_activity, #out_bytes, #out_msgs, #subscriptions, #writev_size

Instance Method Summary collapse

Methods included from Connection

#client_info, #connect_ssl_timeout, #debug_print_controlline_too_big, #debug_print_msg_too_big, #delete_subscriber, #error_close, #flush_data, #info, #max_connections_exceeded?, #process_connect_config, #process_unbind, #queue_data, #send_ping, #ssl_handshake_completed, #ssl_verify_peer, #strip_op

Constructor Details

#initialize(route = nil) ⇒ Route


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# File 'lib/nats/server/route.rb', line 12

def initialize(route=nil)
  @r_obj = route
end

Instance Attribute Details

#closingObject (readonly)

Returns the value of attribute closing


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# File 'lib/nats/server/route.rb', line 8

def closing
  @closing
end

#r_objObject (readonly)

Returns the value of attribute r_obj


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# File 'lib/nats/server/route.rb', line 8

def r_obj
  @r_obj
end

#reconnectingObject (readonly) Also known as: reconnecting?

Returns the value of attribute reconnecting


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# File 'lib/nats/server/route.rb', line 8

def reconnecting
  @reconnecting
end

#remote_ridObject (readonly)

Returns the value of attribute remote_rid


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# File 'lib/nats/server/route.rb', line 8

def remote_rid
  @remote_rid
end

#ridObject (readonly)

Returns the value of attribute rid


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# File 'lib/nats/server/route.rb', line 8

def rid
  @rid
end

Instance Method Details

#auth_ok?(user, pass) ⇒ Boolean


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# File 'lib/nats/server/route.rb', line 230

def auth_ok?(user, pass)
  Server.route_auth_ok?(user, pass)
end

#cancel_reconnectObject


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# File 'lib/nats/server/route.rb', line 249

def cancel_reconnect
  EM.cancel_timer(@reconnect_timer) if @reconnect_timer
  @reconnect_timer = nil
  @reconnecting = false
end

#connect_auth_timeoutObject


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# File 'lib/nats/server/route.rb', line 83

def connect_auth_timeout
  error_close AUTH_REQUIRED
  debug "#{type} connection timeout due to lack of auth credentials", rid
end

#connection_completedObject


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# File 'lib/nats/server/route.rb', line 20

def connection_completed
  debug "Route connected", rid
  return unless reconnecting?

  # Kill reconnect if we got here from there
  cancel_reconnect
  @buf, @closing = nil, false
  post_init
end

#ctrace(*args) ⇒ Object


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# File 'lib/nats/server/route.rb', line 265

def ctrace(*args)
  trace(args, "r: #{rid}")
end

#dec_connectionsObject


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# File 'lib/nats/server/route.rb', line 239

def dec_connections
  Server.num_routes -= 1
  Server.remove_route(self)
end

#inc_connectionsObject


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# File 'lib/nats/server/route.rb', line 234

def inc_connections
  Server.num_routes += 1
  Server.add_route(self)
end

#is_route?Boolean


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# File 'lib/nats/server/route.rb', line 269

def is_route?
  true
end

#post_initObject


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# File 'lib/nats/server/route.rb', line 30

def post_init
  @rid = Server.rid
  @subscriptions = {}
  @in_msgs = @out_msgs = @in_bytes = @out_bytes = 0
  @writev_size = 0
  @parse_state = AWAITING_CONTROL_LINE

  # Queue up auth if needed and we solicited the connection
  debug "Route connection created", peer_info, rid

  # queue up auth if needed and we solicited the connection
  if solicited?
    debug "Route sent authorization", rid
    send_auth
  else
    # FIXME, separate variables for timeout?
    @auth_pending = EM.add_timer(NATSD::Server.auth_timeout) { connect_auth_timeout } if Server.route_auth_required?
  end

  send_info
  @ping_timer = EM.add_periodic_timer(NATSD::Server.ping_interval) { send_ping }
  @pings_outstanding = 0
  inc_connections
  send_local_subs_to_route
end

#process_connect_route_config(config) ⇒ Object


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# File 'lib/nats/server/route.rb', line 66

def process_connect_route_config(config)
  @verbose  = config['verbose'] unless config['verbose'].nil?
  @pedantic = config['pedantic'] unless config['pedantic'].nil?

  return queue_data(OK) unless Server.route_auth_required?

  EM.cancel_timer(@auth_pending)
  if auth_ok?(config['user'], config['pass'])
    debug "Route received proper credentials", rid
    queue_data(OK) if @verbose
    @auth_pending = nil
  else
    error_close AUTH_FAILED
    debug "Authorization failed for #{type.downcase} connection", rid
  end
end

#process_info(info_json) ⇒ Object


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# File 'lib/nats/server/route.rb', line 224

def process_info(info_json)
  info = JSON.parse(info_json)
  @remote_rid = info['server_id'] unless info['server_id'].nil?
  super(info_json)
end

#receive_data(data) ⇒ Object


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# File 'lib/nats/server/route.rb', line 88

def receive_data(data)
  @buf = @buf ? @buf << data : data
  return close_connection if @buf =~ /(\006|\004)/ # ctrl+c or ctrl+d for telnet friendly

  while (@buf && !@closing)
    case @parse_state
    when AWAITING_CONTROL_LINE
      case @buf
      when MSG
        ctrace('MSG OP', strip_op($&)) if NATSD::Server.trace_flag?
        return connect_auth_timeout if @auth_pending
        @buf = $'
        @parse_state = AWAITING_MSG_PAYLOAD
        @msg_sub, @msg_sid, @msg_reply, @msg_size = $1, $2, $4, $5.to_i
        if (@msg_size > NATSD::Server.max_payload)
          debug_print_msg_too_big(@msg_size)
          error_close PAYLOAD_TOO_BIG
        end
        queue_data(INVALID_SUBJECT) if (@pedantic && !(@msg_sub =~ SUB_NO_WC))
      when SUB_OP
        ctrace('SUB OP', strip_op($&)) if NATSD::Server.trace_flag?
        return connect_auth_timeout if @auth_pending
        @buf = $'
        sub, qgroup, sid = $1, $3, $4
        return queue_data(INVALID_SUBJECT) if !($1 =~ SUB)
        return queue_data(INVALID_SID_TAKEN) if @subscriptions[sid]
        sub = Subscriber.new(self, sub, sid, qgroup, 0)
        @subscriptions[sid] = sub
        Server.subscribe(sub, is_route?)
        queue_data(OK) if @verbose
      when UNSUB_OP
        ctrace('UNSUB OP', strip_op($&)) if NATSD::Server.trace_flag?
        return connect_auth_timeout if @auth_pending
        @buf = $'
        sid, sub = $1, @subscriptions[$1]
        if sub
          # If we have set max_responses, we will unsubscribe once we have received
          # the appropriate amount of responses.
          sub.max_responses = ($2 && $3) ? $3.to_i : nil
          delete_subscriber(sub) unless (sub.max_responses && (sub.num_responses < sub.max_responses))
          queue_data(OK) if @verbose
        else
          queue_data(INVALID_SID_NOEXIST) if @pedantic
        end
      when PING
        ctrace('PING OP') if NATSD::Server.trace_flag?
        @buf = $'
        queue_data(PONG_RESPONSE)
        flush_data
      when PONG
        ctrace('PONG OP') if NATSD::Server.trace_flag?
        @buf = $'
        @pings_outstanding -= 1
      when CONNECT
        ctrace('CONNECT OP', strip_op($&)) if NATSD::Server.trace_flag?
        @buf = $'
        begin
          config = JSON.parse($1)
          process_connect_route_config(config)
        rescue => e
          queue_data(INVALID_CONFIG)
          log_error
        end
      when INFO_REQ
        ctrace('INFO_REQUEST OP') if NATSD::Server.trace_flag?
        return connect_auth_timeout if @auth_pending
        @buf = $'
        send_info
      when INFO
        ctrace('INFO OP', strip_op($&)) if NATSD::Server.trace_flag?
        return connect_auth_timeout if @auth_pending
        @buf = $'
        process_info($1)
      when ERR_RESP
        ctrace('-ERR', $1) if NATSD::Server.trace_flag?
        close_connection
        exit
      when OK_RESP
        ctrace('+OK') if NATSD::Server.trace_flag?
        @buf = $'
      when UNKNOWN
        ctrace('Unknown Op', strip_op($&)) if NATSD::Server.trace_flag?
        return connect_auth_timeout if @auth_pending
        @buf = $'
        queue_data(UNKNOWN_OP)
      else
        # If we are here we do not have a complete line yet that we understand.
        # If too big, cut the connection off.
        if @buf.bytesize > NATSD::Server.max_control_line
          debug_print_controlline_too_big(@buf.bytesize)
          close_connection
        end
        return
      end
      @buf = nil if (@buf && @buf.empty?)

    when AWAITING_MSG_PAYLOAD
      return unless (@buf.bytesize >= (@msg_size + CR_LF_SIZE))
      msg = @buf.slice(0, @msg_size)

      ctrace('Processing routed msg', @msg_sub, @msg_reply, msg) if NATSD::Server.trace_flag?
      queue_data(OK) if @verbose

      # We deliver normal subscriptions like a client publish, which
      # eliminates the duplicate traversal over the route. However,
      # qgroups are sent individually per group for only the route
      # with the intended subscriber, since route interest is L2
      # semantics, we deliver those direct.
      if (sub = Server.rsid_qsub(@msg_sid))
        # Allows nil reply to not have extra space
        reply = @msg_reply + ' ' if @msg_reply
        Server.deliver_to_subscriber(sub, @msg_sub, reply, msg)
      else
        Server.route_to_subscribers(@msg_sub, @msg_reply, msg, is_route?)
      end

      @in_msgs += 1
      @in_bytes += @msg_size
      @buf = @buf.slice((@msg_size + CR_LF_SIZE), @buf.bytesize)
      @msg_sub = @msg_size = @reply = nil
      @parse_state = AWAITING_CONTROL_LINE
      @buf = nil if (@buf && @buf.empty?)
    end
  end
end

#send_authObject


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# File 'lib/nats/server/route.rb', line 214

def send_auth
  return unless r_obj[:uri].user
  cs = { :user => r_obj[:uri].user, :pass => r_obj[:uri].password }
  queue_data("CONNECT #{cs.to_json}#{CR_LF}")
end

#send_infoObject


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# File 'lib/nats/server/route.rb', line 220

def send_info
  queue_data("INFO #{Server.route_info_string}#{CR_LF}")
end

#send_local_subs_to_routeObject

TODO: Make sure max_requested is also propogated on reconnect


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# File 'lib/nats/server/route.rb', line 57

def send_local_subs_to_route
  ObjectSpace.each_object(NATSD::Connection) do |c|
    next if c.closing? || c.type != 'Client'
    c.subscriptions.each_value do |sub|
      queue_data(NATSD::Server.route_sub_proto(sub))
    end
  end
end

#solicited?Boolean


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# File 'lib/nats/server/route.rb', line 16

def solicited?
  r_obj != nil
end

#try_reconnectObject


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# File 'lib/nats/server/route.rb', line 244

def try_reconnect
  debug "Trying to reconnect route", peer_info, rid
  EM.reconnect(r_obj[:uri].host, r_obj[:uri].port, self)
end

#typeObject


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# File 'lib/nats/server/route.rb', line 273

def type
  'Route'
end

#unbindObject


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# File 'lib/nats/server/route.rb', line 255

def unbind
  return if reconnecting?
  debug "Route connection closed", peer_info, rid
  process_unbind
  if solicited?
    @reconnecting = true
    @reconnect_timer = EM.add_periodic_timer(NATSD::DEFAULT_ROUTE_RECONNECT_INTERVAL) { try_reconnect }
  end
end