Class: Flor::Caller

Inherits:
Object
  • Object
show all
Defined in:
lib/flor/unit/caller.rb,
lib/flor/unit/caller_jruby.rb

Overview

The caller calls Ruby or other scripts.

Defined Under Namespace

Modules: CmdParser Classes: ProcessStatus, SpawnError, SpawnNonZeroExitError, TimeoutError, WrappedSpawnError

Instance Method Summary collapse

Constructor Details

#initialize(unit) ⇒ Caller

NB: tasker configuration entries start with “cal_”



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# File 'lib/flor/unit/caller.rb', line 11

def initialize(unit)

  @unit = unit
end

Instance Method Details

#call(service, conf, message) ⇒ Object 



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# File 'lib/flor/unit/caller.rb', line 19

def call(service, conf, message)

  return ruby_call(service, conf, message) \
    if conf['class'] || conf['module']
  return cmd_call(service, conf, message) \
    if conf['cmd']

  fail ArgumentError.new("don't know how to call item at #{conf['_path']}")

rescue => err

  [ Flor.to_error_message(message, err) ]
end

#shutdown ⇒ Object 



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# File 'lib/flor/unit/caller.rb', line 16

def shutdown
end

#spawn(conf, data) ⇒ Object 



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# File 'lib/flor/unit/caller.rb', line 198

def spawn(conf, data)

  t0 = Time.now

  cmd = conf['cmd']

  to = Fugit.parse(conf['timeout'] || '14s')
  to = to.is_a?(Fugit::Duration) ? to.to_sec : 14
  to = 0 if to < 0 # no timeout

  i, o = IO.pipe # _ / stdout
  f, e = IO.pipe # _ / stderr
  r, w = IO.pipe # stdin / _

  pid = Kernel.spawn(cmd, in: r, out: o, err: e)
  w.write(data)
  w.close
  o.close
  e.close

  _, status = timeout(to) { Process.wait2(pid) }

  fail SpawnNonZeroExitError.new(conf, { to: to, t0: t0 }, status, i, f) \
    if status.exitstatus != 0

  [ i.read, status ]

rescue => err

  Process.detach(pid) \
    if pid
  (Process.kill(9, pid) rescue nil) \
    unless Flor.no?(conf['on_error_kill'])

  raise err if err.is_a?(SpawnError)
  raise WrappedSpawnError.new(conf, { to: to, t0: t0, pid: pid }, err)

ensure

  [ i, o, f, e, r, w ].each { |x| x.close rescue nil }
end

#split_cmd(cmd) ⇒ Object 



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# File 'lib/flor/unit/caller_jruby.rb', line 7

def split_cmd(cmd)

  #cmd.split(/ +/)
    # too naive

#Raabro.pp(Flor::Caller::CmdParser.parse(cmd, debug: 3), colours: true)
  Flor::Caller::CmdParser.parse(cmd)
end