Class: OpalWebpackLoader::CompileServer

Inherits:
Object
  • Object
show all
Defined in:
lib/opal-webpack-loader/compile_server.rb

Constant Summary collapse

OWL_CACHE_DIR = 
File.join('.','.owl_cache/')
OWL_LP_CACHE = 
File.join(OWL_CACHE_DIR, 'load_paths.json')
OWCS_SOCKET_PATH = 
File.join(OWL_CACHE_DIR, 'owcs_socket')
SIGNALS = 
%w[QUIT INT TERM TTIN TTOU]
TIMEOUT = 
15

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CompileServer

Returns a new instance of CompileServer.



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# File 'lib/opal-webpack-loader/compile_server.rb', line 38

def initialize
  @read_pipe, @write_pipe = IO.pipe
  @workers = {}
  @signal_queue = []
end

Class Method Details



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# File 'lib/opal-webpack-loader/compile_server.rb', line 19

def self.dont_unlink_socket_on_exit
  @unlink = false
end

.stop(do_exit = true) ⇒ Object 



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# File 'lib/opal-webpack-loader/compile_server.rb', line 23

def self.stop(do_exit = true)
  if File.exist?(OWCS_SOCKET_PATH)
    dont_unlink_socket_on_exit
    begin
      s = UNIXSocket.new(OWCS_SOCKET_PATH)
      s.send("command:stop\x04", 0)
      s.close
    rescue
      # socket cant be reached so owlcs is already dead, delete socket
      unlink_socket_on_exit
    end
    exit(0) if do_exit
  end
end

.unlink_socket? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/opal-webpack-loader/compile_server.rb', line 11

def self.unlink_socket?
  @unlink
end

.unlink_socket_on_exit ⇒ Object 



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# File 'lib/opal-webpack-loader/compile_server.rb', line 15

def self.unlink_socket_on_exit
  @unlink = true
end

Instance Method Details

#start(number_of_workers = 4) ⇒ Object 



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# File 'lib/opal-webpack-loader/compile_server.rb', line 44

def start(number_of_workers = 4)
  $PROGRAM_NAME = 'owl compile server'
  @number_of_workers = number_of_workers
  @server_pid = Process.pid
  $stderr.sync = $stdout.sync = true
  @socket = UNIXServer.new(OWCS_SOCKET_PATH)
  spawn_workers
  SIGNALS.each { |sig| trap_deferred(sig) }
  trap('CHLD') { @write_pipe.write_nonblock('.') }

  loop do
    reap_workers
    case (mode = @signal_queue.shift)
    when nil
      kill_runaway_workers
      spawn_workers
    when 'QUIT', 'TERM', 'INT'
      @workers.each_pair do |pid, _worker|
        Process.kill('TERM', pid)
      end
      break
    when 'TTIN'
      @number_of_workers += 1
    when 'TTOU'
      unless @number_of_workers <= 0
        Config.workers -= 1
        kill_worker('QUIT', @workers.keys.max)
      end
    end
    reap_workers
    ready = IO.select([@read_pipe], nil, nil, 1) || next
    ready.first && ready.first.first || next
    @read_pipe.read_nonblock(1)
    OpalWebpackLoader::CompileServer.unlink_socket_on_exit
  end
end