Class: ACE::ForkUtil

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

Class Method Summary collapse

Class Method Details

.isolate ⇒ Object

Forks and calls a function It is expected that the function returns a JSON response Throws an exception if JSON.generate fails to generate



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# File 'lib/ace/fork_util.rb', line 11

def self.isolate
  reader, writer = IO.pipe
  pid = fork {
    success = true
    begin
      response = yield
      writer.puts JSON.generate(response)
    rescue StandardError => e
      writer.puts(e)
      success = false
    ensure
      Process.exit! success
    end
  }
  unless pid
    log "Could not fork"
    exit 1
  end
  writer.close
  output = reader.read
  Process.wait(pid)
  if $CHILD_STATUS != 0
    raise output
  else
    JSON.parse(output)
  end
end