Mojo::Reactor - Low level event reactor base class
package Mojo::Reactor::MyEventLoop; use Mojo::Base 'Mojo::Reactor'; $ENV{MOJO_REACTOR} ||= 'Mojo::Reactor::MyEventLoop'; sub io {...} sub is_running {...} sub one_tick {...} sub recurring {...} sub remove {...} sub start {...} sub stop {...} sub timer {...} sub watch {...}
Mojo::Reactor is an abstract base class for low level event reactors.
Mojo::Reactor can emit the following events.
error
$reactor->on(error => sub { my ($reactor, $err) = @_; ... });
Emitted safely for exceptions caught in callbacks.
$reactor->on(error => sub { my ($reactor, $err) = @_; say "Something very bad happened: $err"; });
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, Mojo::Reactor::EV or Mojo::Reactor::Poll.
MOJO_REACTOR
# Instantiate best reactor implementation available my $reactor = Mojo::Reactor->detect->new;
io
$reactor = $reactor->io($handle => sub {...});
Watch handle for I/O events, invoking the callback whenever handle becomes readable or writable. Meant to be overloaded in a subclass.
# 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'; });
is_readable
my $success = $reactor->is_readable($handle);
Quick non-blocking check if a handle is readable, useful for identifying tainted sockets.
is_running
my $success = $reactor->is_running;
Check if reactor is running. Meant to be overloaded in a subclass.
one_tick
$reactor->one_tick;
Run reactor until an event occurs. Note that this method can recurse back into the reactor, so you need to be careful. Meant to be overloaded in a subclass.
# 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. Meant to be overloaded in a subclass.
# Invoke as soon as possible $reactor->recurring(0 => sub { say 'Reactor tick.' });
remove
my $success = $reactor->remove($handle); my $success = $reactor->remove($id);
Remove handle or timer. Meant to be overloaded in a subclass.
start
$reactor->start;
Start watching for I/O and timer events, this will block until stop is called. Note that some reactors stop automatically if there are no events being watched anymore. Meant to be overloaded in a subclass.
stop
$reactor->stop;
Stop watching for I/O and timer events. Meant to be overloaded in a subclass.
timer
my $id = $reactor->timer(0.5 => sub {...});
Create a new timer, invoking the callback after a given amount of time in seconds. Meant to be overloaded in a subclass.
# Invoke as soon as possible $reactor->timer(0 => sub { say 'Next tick.' });
watch
$reactor = $reactor->watch($handle, $readable, $writable);
Change I/O events to watch handle for with true and false values. Meant to be overloaded in a subclass. Note that this method requires an active I/O watcher.
true
false
# 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);
Mojolicious, Mojolicious::Guides, http://mojolicio.us.
To install Mojolicious, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Mojolicious
CPAN shell
perl -MCPAN -e shell install Mojolicious
For more information on module installation, please visit the detailed CPAN module installation guide.