NAME

   Mojo::Reactor::UV - UV backend for Mojo::Reactor

SYNOPSIS

     use Mojo::Reactor::UV;

     # Watch if handle becomes readable or writable
     my $reactor = Mojo::Reactor::UV->new;
     $reactor->io($first => sub {
       my ($reactor, $writable) = @_;
       say $writable ? 'First handle is writable' : 'First handle is readable';
     });

     # Change to watching only if handle becomes writable
     $reactor->watch($first, 0, 1);

     # Turn file descriptor into handle and watch if it becomes readable
     my $second = IO::Handle->new_from_fd($fd, 'r');
     $reactor->io($second => sub {
       my ($reactor, $writable) = @_;
       say $writable ? 'Second handle is writable' : 'Second handle is readable';
     })->watch($second, 1, 0);

     # Add a timer
     $reactor->timer(15 => sub {
       my $reactor = shift;
       $reactor->remove($first);
       $reactor->remove($second);
       say 'Timeout!';
     });

     # Start reactor if necessary
     $reactor->start unless $reactor->is_running;

     # Or in an application using Mojo::IOLoop
     use Mojo::Reactor::UV;
     use Mojo::IOLoop;

     # Or in a Mojolicious application
     $ MOJO_REACTOR=Mojo::Reactor::UV hypnotoad script/myapp

DESCRIPTION

   Mojo::Reactor::UV is an event reactor for Mojo::IOLoop that uses libuv.
   The usage is exactly the same as other Mojo::Reactor implementations
   such as Mojo::Reactor::Poll. Mojo::Reactor::UV will be used as the
   default backend for Mojo::IOLoop if it is loaded before Mojo::IOLoop or
   any module using the loop. However, when invoking a Mojolicious
   application through morbo or hypnotoad, the reactor must be set as the
   default by setting the MOJO_REACTOR environment variable to
   Mojo::Reactor::UV.

EVENTS

   Mojo::Reactor::UV inherits all events from Mojo::Reactor::Poll.

METHODS

   Mojo::Reactor::UV inherits all methods from Mojo::Reactor::Poll and
   implements the following new ones.

new

     my $reactor = Mojo::Reactor::UV->new;

   Construct a new Mojo::Reactor::UV object.

again

     $reactor->again($id);

   Restart timer. Note that this method requires an active timer.

io

     $reactor = $reactor->io($handle => sub {...});

   Watch handle for I/O events, invoking the callback whenever handle
   becomes readable or writable.

     # Callback will be invoked twice if handle becomes readable and writable
     $reactor->io($handle => sub {
       my ($reactor, $writable) = @_;
       say $writable ? 'Handle is writable' : 'Handle is readable';
     });

one_tick

     $reactor->one_tick;

   Run reactor until an event occurs or no events are being watched
   anymore. Note that this method can recurse back into the reactor, so
   you need to be careful.

     # Don't block longer than 0.5 seconds
     my $id = $reactor->timer(0.5 => sub {});
     $reactor->one_tick;
     $reactor->remove($id);

recurring

     my $id = $reactor->recurring(0.25 => sub {...});

   Create a new recurring timer, invoking the callback repeatedly after a
   given amount of time in seconds.

remove

     my $bool = $reactor->remove($handle);
     my $bool = $reactor->remove($id);

   Remove handle or timer.

reset

     $reactor->reset;

   Remove all handles and timers.

timer

     my $id = $reactor->timer(0.5 => sub {...});

   Create a new timer, invoking the callback after a given amount of time
   in seconds.

watch

     $reactor = $reactor->watch($handle, $readable, $writable);

   Change I/O events to watch handle for with true and false values. Note
   that this method requires an active I/O watcher.

     # Watch only for readable events
     $reactor->watch($handle, 1, 0);

     # Watch only for writable events
     $reactor->watch($handle, 0, 1);

     # Watch for readable and writable events
     $reactor->watch($handle, 1, 1);

     # Pause watching for events
     $reactor->watch($handle, 0, 0);

CAVEATS

   When using Mojo::IOLoop with UV, the event loop must be controlled by
   Mojo::IOLoop or Mojo::Reactor::UV, such as with the methods "start",
   "stop", and "one_tick". Starting or stopping the event loop through UV
   will not provide required functionality to Mojo::IOLoop applications.

   Care should be taken that file descriptors are not closed while being
   watched by the reactor. They can be safely closed after calling "watch"
   with readable and writable set to 0, or after removing the handle with
   "remove" or "reset".

   On windows, libuv can only watch sockets, not regular filehandles.

BUGS

   Report any issues on the public bugtracker.

AUTHOR

   Dan Book, [email protected]

COPYRIGHT AND LICENSE

   Copyright 2015, Dan Book.

   This library is free software; you may redistribute it and/or modify it
   under the terms of the Artistic License version 2.0.

SEE ALSO

   Mojolicious, Mojo::IOLoop, UV