NAME

Twiggy::Prefork - Preforking AnyEvent HTTP server for PSGI

SYNOPSIS

$ plackup -s Twiggy::Prefork -a app.psgi

DESCRIPTION

Twiggy::Prefork is Preforking AnyEvent HTTP server for PSGI based on Twiggy. This server supports,

• Min/Max Request Per Child

  supports Min/Max Request Per Child feature.

• Superdaemon aware

  Supports Server::Starter for hot deploy and graceful restarts.

  To use it, instead of the usual:

    plackup --server Twiggy::Prefork --port 8111 app.psgi
  

  install Server::Starter and use:

    start_server --port 8111 plackup --server Twiggy::Prefork app.psgi
  

OPTIONS

• max_workers

  number of worker processes (default: 10)

• max_reqs_per_child

  max. number of requests to be handled before a worker process exits. If passed 0, child process is not existed by number of requests (default: 100).

• min_reqs_per_child

  if set, randomizes the number of requests handled by a single worker process between the value and that supplied by --max-reqs-per-child (default: none)

PSGI extensions

• psgix.exit_guard

  AnyEvent::CondVar object. You can make graceful stop mechanism with this variable.

    use Coro;
    use AnyEvent;
  
    my $channel = Coro::Channel->new(100);
  
    async {
      while(1){
        my $q = $channel->get;
        # works..
        $q[0]->end;
      }
    };
  
    #psgi app
    sub {
      my $env = shift;
      my $cv = AE::cv;
      async {
        $env->{psgix.exit_guard}->begin; 
        $channel->put([$env->{psgix.exit_guard}]);
        $cv->send;
      };
      return sub {
        my $start_response = shift;
        $cv->cb(sub {
          $start_response->([200,['Content-Type'=>'text/plain'],['OK']]);
        });
      }
    }
  

  Block Twiggy::Prefork worker process exiting until your jobs done.

AUTHOR

Masahiro Nagano <kazeburo {at} gmail.com>

Shigeki Morimoto

SEE ALSO

Twiggy, Parallel::Prefork

LICENSE

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.