Class: Mqlight::UnsecureEndPoint

Inherits:
Object
  • Object
show all
Includes:
Logging
Defined in:
lib/mqlight/connection.rb

Direct Known Subclasses

SecureEndPoint

Instance Method Summary collapse

Methods included from Logging

#logger, logger

Constructor Details

#initialize(args) ⇒ UnsecureEndPoint

Returns a new instance of UnsecureEndPoint.



291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
 
# File 'lib/mqlight/connection.rb', line 291

def initialize(args)
  logger.entry(@id) { self.class.to_s + '#' + __method__.to_s }
  parms = Hash[method(__method__).parameters.map do |parm|
    [parm[1], eval(parm[1].to_s)]
  end]
  logger.parms(@id, parms) { self.class.to_s + '#' + __method__.to_s }

  @thread_vars = args[:thread_vars]
  @proton = @thread_vars.proton
  @service = @thread_vars.service
  hostname = @service.host
  port = @service.port

  begin
    @tcp_transport = TCPSocket.open(hostname, port)
    @proton.sockets_open = true
  rescue => e
    logger.throw(@id, e) { self.class.to_s + '#' + __method__.to_s }
    raise Mqlight::NetworkError, e.to_s
  end

  @transport = @tcp_transport
  logger.exit(@id) { self.class.to_s + '#' + __method__.to_s }
end

Instance Method Details

#incoming_thread ⇒ Object 



355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
 
# File 'lib/mqlight/connection.rb', line 355

def incoming_thread
  logger.entry(@id) { self.class.to_s + '#' + __method__.to_s }

  until stopped? or not @proton.sockets_open?
    begin
      logger.often(@id, 'Waiting for incoming message') do
        self.class.to_s + '#' + __method__.to_s
      end

      msg = read_socket
      break if stopped?

      logger.often(@id, 'New incoming message size=' + msg.size.to_s) do
        self.class.to_s + '#' + __method__.to_s
      end unless msg.nil?

      # TODO: a null length message is treated as stream close.
      # TODO: but could the server not send a blank message?
      # TODO: get a way to detect remote end disconnect.
      break  if msg.nil? || msg.size == 0

      until msg.nil? || msg.size == 0
        n = @proton.proton_push(msg)
        if n == -2
          msg = nil
        elsif  n <= 0
          # Busy - try later.
          sleep(0.2)
        elsif n < msg.size
          # trim the message
          msg = msg[n..msg.length]
        else
          # Delivered
          msg = nil
        end
      end

    rescue Errno::ECONNRESET, EOFError => e
      logger.data(@id, 'Connection remotely terminated') do
        self.class.to_s + '#' + __method__.to_s
      end
      @proton.sockets_open = false

      unless stopped? || stopping?
        # A race condition can occur here as this error
        # could be processed before the preceeding CLOSE
        # message is read. This then results in a Retry
        # So ... delaying the report to ensure any CLOSE
        # message is processed first
        sleep 0.5
        ne = Mqlight::NetworkError.new(
          'Connection remotely terminated [' + e.to_s + ']')
        @thread_vars.change_state(:retrying, ne)
      end
      break
    rescue => e
      logger.data(@id, "Exception: #{e}") do
        self.class.to_s + '#' + __method__.to_s
      end
      logger.ffdc(self.class.to_s + '#' + __method__.to_s,
                  'ffdc002', self, 'Uncaught exception', e)
    end
  end
  @proton.sockets_open = false
  logger.exit(@id) { self.class.to_s + '#' + __method__.to_s }
end

#outgoing_thread ⇒ Object 



432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
 
# File 'lib/mqlight/connection.rb', line 432

def outgoing_thread
  logger.entry(@id) { self.class.to_s + '#' + __method__.to_s }
  deliver = @thread_vars.proton.create_delivery_message(@service)

  until stopped? or not @proton.sockets_open?
    begin
      logger.often(@id, 'Waiting for outgoing message') do
        self.class.to_s + '#' + __method__.to_s
      end
      msg = deliver.get
      if msg.nil?
        # Wait a little and wake-up proton in case a heart beat is required.
        deliver.empty_pop
        sleep(0.01)
      else
        logger.often(@id, 'Outgoing message size=' + msg.size.to_s) do
          self.class.to_s + '#' + __method__.to_s
        end
        @transport.write(msg)
        @transport.flush
      end

    rescue Errno::EPIPE => e
      logger.data(@id, 'Connection remotely terminated') do
        self.class.to_s + '#' + __method__.to_s
      end
      @proton.sockets_open = false
      # A race condition can occur here as this error
      # could be processed before the preceeding CLOSE
      # message is read. This then results in a Retry
      # So ... delaying the report to ensure any CLOSE
      # message is processed first
      sleep 0.5
      ne = Mqlight::NetworkError.new(
        'Connection remotely terminated [' + e.to_s + ']')
      @thread_vars.change_state(:retrying, ne)
    rescue => e
      logger.ffdc(self.class.to_s + '#' + __method__.to_s,
                  'ffdc003', self, 'Uncaught exception', e)
    end
  end
  logger.exit(@id) { self.class.to_s + '#' + __method__.to_s }
rescue => e
  logger.ffdc(self.class.to_s + '#' + __method__.to_s,
              'ffdc004', self, 'Uncaught exception', e)
end

#read_socket ⇒ Object 



425
426
427
 
# File 'lib/mqlight/connection.rb', line 425

def read_socket
  @transport.recv(1024)
end

#retrying? ⇒ Boolean

Returns:

  • (Boolean) 


496
497
498
 
# File 'lib/mqlight/connection.rb', line 496

def retrying?
  @thread_vars.state == :retrying
end

#start_connection_threads ⇒ Object 



319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
 
# File 'lib/mqlight/connection.rb', line 319

def start_connection_threads
  logger.entry(@id) { self.class.to_s + '#' + __method__.to_s }

  @incoming = Thread.new do
    incoming_thread
  end

  @outgoing = Thread.new do
    outgoing_thread
  end

  # Time for the threads to start
  sleep(0.1)
  logger.exit(@id) { self.class.to_s + '#' + __method__.to_s }
end

#stop_threads ⇒ Object

Stop the IO threads



338
339
340
341
342
343
344
345
346
347
348
349
350
 
# File 'lib/mqlight/connection.rb', line 338

def stop_threads
  logger.entry(@id) { self.class.to_s + '#' + __method__.to_s }
  begin
    @transport.shutdown(:WR)
  rescue => e
    logger.data(@id, 'Ignored: shutdown error ' + e.to_s) do
      self.class.to_s + '#' + __method__.to_s
    end
  end
  @incoming.kill
  @outgoing.kill
  logger.exit(@id) { self.class.to_s + '#' + __method__.to_s }
end

#stopped? ⇒ Boolean

Returns:

  • (Boolean) 


482
483
484
 
# File 'lib/mqlight/connection.rb', line 482

def stopped?
  @thread_vars.state == :stopped
end

#stopping? ⇒ Boolean

Returns:

  • (Boolean) 


489
490
491
 
# File 'lib/mqlight/connection.rb', line 489

def stopping?
  @thread_vars.state == :stopping
end