NAME
Mojo::Reactor - Minimalistic low level event reactor
SYNOPSIS
use Mojo::Reactor;
# Watch if handle becomes readable or writabe
my $reactor = Mojo::Reactor->new;
$reactor->io($handle => sub {
my ($reactor, $handle, $writable) = @_;
say $writable ? 'Handle is writable' : 'Handle is readable';
});
# Add a timer
$reactor->timer(15 => sub {
my $reactor = shift;
$reactor->drop($handle);
say 'Timeout!';
});
# Start reactor if necessary
$reactor->start unless $reactor->is_running;DESCRIPTION
Mojo::Reactor is a minimalistic low level event reactor based on IO::Poll and the foundation of Mojo::IOLoop. Mojo::Reactor::EV is a good example for its extensibility. Note that this module is EXPERIMENTAL and might change without warning!
EVENTS
Mojo::Reactor can emit the following events.
error
$reactor->on(error => sub {
my ($reactor, $err) = @_;
...
});Emitted safely if an error happens.
$reactor->on(error => sub {
my ($reactor, $err) = @_;
say "Something very bad happened: $err";
});METHODS
Mojo::Reactor inherits all methods from Mojo::EventEmitter and implements the following new ones.
detect
my $class = Mojo::Reactor->detect;Detect and load the best reactor implementation available, will try the value of the MOJO_REACTOR environment variable or Mojo::Reactor::EV.
drop
my $success = $reactor->drop($handle);
my $success = $reactor->drop($id);Drop handle or 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, $handle, $writable) = @_;
say $writable ? 'Handle is writable' : 'Handle is readable';
});is_readable
my $success = $reactor->is_readable($handle);Quick check if a handle is readable, useful for identifying tainted sockets.
is_running
my $success = $reactor->is_running;Check if reactor is running.
recurring
my $id = $reactor->recurring(3 => sub {...});Create a new recurring timer, invoking the callback repeatedly after a given amount of time in seconds.
start
$reactor->start;Start watching for I/O and timer events, this will block until stop is called or no events are being watched anymore.
stop
$reactor->stop;Stop watching for I/O and timer events.
timer
my $id = $reactor->timer(3 => sub {...});Create a new timer, invoking the callback after a given amount of time in seconds.
watch
$reactor = $reactor->watch($handle, $read, $write);Change I/O events to watch handle for.
# 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);