class ChildProcess::JRuby::Process

Public Class Methods

new(args) click to toggle source
Calls superclass method ChildProcess::AbstractProcess.new
# File lib/childprocess/jruby/process.rb, line 6
def initialize(args)
  super(args)

  @pumps = []
end

Public Instance Methods

exited?() click to toggle source
# File lib/childprocess/jruby/process.rb, line 16
def exited?
  return true if @exit_code

  assert_started
  @exit_code = @process.exitValue
  stop_pumps

  true
rescue java.lang.IllegalThreadStateException
  false
ensure
  log(:exit_code => @exit_code)
end
io() click to toggle source
# File lib/childprocess/jruby/process.rb, line 12
def io
  @io ||= JRuby::IO.new
end
pid() click to toggle source

Only supported in JRuby on a Unix operating system, thanks to limitations in Java's classes

@return [Fixnum] the pid of the process after it has started @raise [NotImplementedError] when trying to access pid on non-Unix platform

# File lib/childprocess/jruby/process.rb, line 55
def pid
  if @process.getClass.getName != "java.lang.UNIXProcess"
    raise NotImplementedError, "pid is only supported by JRuby child processes on Unix"
  end

  # About the best way we can do this is with a nasty reflection-based impl
  # Thanks to Martijn Courteaux
  # http://stackoverflow.com/questions/2950338/how-can-i-kill-a-linux-process-in-java-with-sigkill-process-destroy-does-sigter/2951193#2951193
  field = @process.getClass.getDeclaredField("pid")
  field.accessible = true
  field.get(@process)
end
stop(timeout = nil) click to toggle source
# File lib/childprocess/jruby/process.rb, line 30
def stop(timeout = nil)
  assert_started

  @process.destroy
  wait # no way to actually use the timeout here..
end
wait() click to toggle source
# File lib/childprocess/jruby/process.rb, line 37
def wait
  if exited?
    exit_code
  else
    @process.waitFor

    stop_pumps
    @exit_code = @process.exitValue
  end
end

Private Instance Methods

create_stdin() click to toggle source
# File lib/childprocess/jruby/process.rb, line 120
def create_stdin
  output_stream = @process.getOutputStream

  stdin = output_stream.to_io
  stdin.sync = true
  stdin.instance_variable_set(:@childprocess_java_stream, output_stream)

  class << stdin
    # The stream provided is a BufferedeOutputStream, so we
    # have to flush it to make the bytes flow to the process
    def __childprocess_flush__
      @childprocess_java_stream.flush
    end

    [:flush, :print, :printf, :putc, :puts, :write, :write_nonblock].each do |m|
      define_method(m) do |*args|
        super(*args)
        self.__childprocess_flush__
      end
    end
  end

  stdin
end
launch_process(&blk) click to toggle source
# File lib/childprocess/jruby/process.rb, line 70
def launch_process(&blk)
  pb = java.lang.ProcessBuilder.new(@args)

  pb.directory java.io.File.new(@cwd || Dir.pwd)
  set_env pb.environment

  begin
    @process = pb.start
  rescue java.io.IOException => ex
    raise LaunchError, ex.message
  end

  setup_io
end
redirect(input, output) click to toggle source
# File lib/childprocess/jruby/process.rb, line 101
def redirect(input, output)
  if output.nil?
    input.close
    return
  end

  @pumps << Pump.new(input, output.to_outputstream).run
end
set_env(env) click to toggle source
# File lib/childprocess/jruby/process.rb, line 114
def set_env(env)
  ENV.to_hash.merge(@environment).each do |k,v|
    env.put(k.to_s, v.to_s) if v
  end
end
setup_io() click to toggle source
# File lib/childprocess/jruby/process.rb, line 85
def setup_io
  if @io
    redirect(@process.getErrorStream, @io.stderr)
    redirect(@process.getInputStream, @io.stdout)
  else
    @process.getErrorStream.close
    @process.getInputStream.close
  end

  if duplex?
    io._stdin = create_stdin
  else
    @process.getOutputStream.close
  end
end
stop_pumps() click to toggle source
# File lib/childprocess/jruby/process.rb, line 110
def stop_pumps
  @pumps.each { |pump| pump.stop }
end