Class: CC::Analyzer::Container

Inherits:
Object
  • Object
show all
Defined in:
lib/cc/analyzer/container.rb

Defined Under Namespace

Classes: ContainerData, Result

Constant Summary collapse

ImageRequired = 
Class.new(StandardError)
DEFAULT_TIMEOUT =

15m

15 * 60
DEFAULT_MAXIMUM_OUTPUT_BYTES = 
500_000_000

Instance Method Summary collapse

Constructor Details

#initialize(image:, name:, command: nil, listener: ContainerListener.new) ⇒ Container

Returns a new instance of Container.

Raises:



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# File 'lib/cc/analyzer/container.rb', line 27

def initialize(image:, name:, command: nil, listener: ContainerListener.new)
  raise ImageRequired if image.blank?
  @image = image
  @name = name
  @command = command
  @listener = listener
  @output_delimeter = "\n"
  @on_output = ->(*) {}
  @timed_out = false
  @maximum_output_exceeded = false
  @stderr_io = StringIO.new
  @output_byte_count = 0
  @counter_mutex = Mutex.new
end

Instance Method Details

#on_output(delimeter = "\n", &block) ⇒ Object 



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# File 'lib/cc/analyzer/container.rb', line 42

def on_output(delimeter = "\n", &block)
  @output_delimeter = delimeter
  @on_output = block
end

#run(options = []) ⇒ Object 



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# File 'lib/cc/analyzer/container.rb', line 47

def run(options = [])
  started = Time.now
  @listener.started(container_data)

  command = docker_run_command(options)
  CLI.debug("docker run: #{command.inspect}")
  pid, _, out, err = POSIX::Spawn.popen4(*command)

  @t_out = read_stdout(out)
  @t_err = read_stderr(err)
  t_timeout = timeout_thread

  # blocks until the engine stops. this is put in a thread so that we can
  # explicitly abort it as part of #stop. otherwise a run-away container
  # could still block here forever if the docker-kill/wait is not
  # successful. there may still be stdout in flight if it was being
  # produced more quickly than consumed.
  @t_wait = Thread.new { _, @status = Process.waitpid2(pid) }
  @t_wait.join

  # blocks until all readers are done. they're still governed by the
  # timeout thread at this point. if we hit the timeout while processing
  # output, the threads will be Thread#killed as part of #stop and this
  # will unblock with the correct value in @timed_out
  [@t_out, @t_err].each(&:join)

  if @timed_out
    duration = timeout * 1000
    @listener.timed_out(container_data(duration: duration))
  else
    duration = ((Time.now - started) * 1000).round
    @listener.finished(container_data(duration: duration, status: @status))
  end

  Result.new(
    @status && @status.exitstatus,
    @timed_out,
    duration,
    @maximum_output_exceeded,
    output_byte_count,
    @stderr_io.string,
  )
ensure
  kill_reader_threads
  t_timeout.kill if t_timeout
end

#stop(message = nil) ⇒ Object 



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# File 'lib/cc/analyzer/container.rb', line 94

def stop(message = nil)
  reap_running_container(message)
  kill_reader_threads
  kill_wait_thread
end