Mojo::IOWatcher - Async IO Watcher
use Mojo::IOWatcher; # Watch if io handles become readable or writable my $watcher = Mojo::IOWatcher->new; $watcher->add($handle, on_readable => sub { my ($watcher, $handle) = @_; ... }); # Use timers $watcher->timer(15 => sub { my $watcher = shift; $watcher->remove($handle); print "Timeout!\n"; }); # And loop! $watcher->one_tick('0.25') while 1;
Mojo::IOWatcher is a minimalistic async io watcher and the foundation of Mojo::IOLoop. Mojo::IOWatcher::KQueue and Mojo::IOWatcher::Epoll are good examples for its extensibility. Note that this module is EXPERIMENTAL and might change without warning!
Mojo::IOWatcher inherits all methods from Mojo::Base and implements the following new ones.
add
$watcher = $watcher->add($handle, on_readable => sub {...});
Add handles and watch for io events.
These options are currently available:
on_readable
Callback to be invoked once the handle becomes readable.
on_writable
Callback to be invoked once the handle becomes writable.
cancel
my $success = $watcher->cancel($id);
Cancel timer.
is_readable
my $readable = $watcher->is_readable($handle);
Quick check if a handle is readable, useful for identifying tainted sockets.
not_writing
$watcher = $watcher->not_writing($handle);
Only watch handle for readable events.
one_tick
$watcher->one_tick('0.25');
Run for exactly one tick and watch for io and timer events.
recurring
my $id = $watcher->recurring(3 => sub {...});
Create a new recurring timer, invoking the callback repeatedly after a given amount of seconds.
remove
$watcher = $watcher->remove($handle);
Remove handle.
timer
my $id = $watcher->timer(3 => sub {...});
Create a new timer, invoking the callback after a given amount of seconds.
watch
$watcher->watch('0.25');
Run for exactly one tick and watch only for io events.
writing
$watcher = $watcher->writing($handle);
Watch handle for readable and writable events.
You can set the MOJO_IOWATCHER_DEBUG environment variable to get some advanced diagnostics information printed to STDERR.
MOJO_IOWATCHER_DEBUG
STDERR
MOJO_IOWATCHER_DEBUG=1
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.