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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" Mojo::Reactor \- Low level event reactor base class .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 2 \& package Mojo::Reactor::MyEventLoop; \& use Mojo::Base \*(AqMojo::Reactor\*(Aq; \& \& $ENV{MOJO_REACTOR} ||= \*(AqMojo::Reactor::MyEventLoop\*(Aq; \& \& sub io {...} \& sub is_running {...} \& sub one_tick {...} \& sub recurring {...} \& sub remove {...} \& sub start {...} \& sub stop {...} \& sub timer {...} \& sub watch {...} \& \& 1; .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" Mojo::Reactor is an abstract base class for low level event reactors. .SH "EVENTS" .IX Header "EVENTS" Mojo::Reactor can emit the following events. .ie n .SS """error""" .el .SS "\f(CWerror\fP" .IX Subsection "error" .Vb 4 \& $reactor\->on(error => sub { \& my ($reactor, $err) = @_; \& ... \& }); .Ve .PP Emitted safely for exceptions caught in callbacks. .PP .Vb 4 \& $reactor\->on(error => sub { \& my ($reactor, $err) = @_; \& say "Something very bad happened: $err"; \& }); .Ve .SH "METHODS" .IX Header "METHODS" Mojo::Reactor inherits all methods from Mojo::EventEmitter and implements the following new ones. .ie n .SS """detect""" .el .SS "\f(CWdetect\fP" .IX Subsection "detect" .Vb 1 \& my $class = Mojo::Reactor\->detect; .Ve .PP Detect and load the best reactor implementation available, will try the value of the \f(CW\*(C`MOJO_REACTOR\*(C'\fR environment variable, Mojo::Reactor::EV or Mojo::Reactor::Poll. .PP .Vb 2 \& # Instantiate best reactor implementation available \& my $reactor = Mojo::Reactor\->detect\->new; .Ve .ie n .SS """io""" .el .SS "\f(CWio\fP" .IX Subsection "io" .Vb 1 \& $reactor = $reactor\->io($handle => sub {...}); .Ve .PP Watch handle for I/O events, invoking the callback whenever handle becomes readable or writable. Meant to be overloaded in a subclass. .PP .Vb 5 \& # Callback will be invoked twice if handle becomes readable and writable \& $reactor\->io($handle => sub { \& my ($reactor, $writable) = @_; \& say $writable ? \*(AqHandle is writable\*(Aq : \*(AqHandle is readable\*(Aq; \& }); .Ve .ie n .SS """is_readable""" .el .SS "\f(CWis_readable\fP" .IX Subsection "is_readable" .Vb 1 \& my $success = $reactor\->is_readable($handle); .Ve .PP Quick non-blocking check if a handle is readable, useful for identifying tainted sockets. .ie n .SS """is_running""" .el .SS "\f(CWis_running\fP" .IX Subsection "is_running" .Vb 1 \& my $success = $reactor\->is_running; .Ve .PP Check if reactor is running. Meant to be overloaded in a subclass. .ie n .SS """one_tick""" .el .SS "\f(CWone_tick\fP" .IX Subsection "one_tick" .Vb 1 \& $reactor\->one_tick; .Ve .PP 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. Meant to be overloaded in a subclass. .PP .Vb 4 \& # Don\*(Aqt block longer than 0.5 seconds \& my $id = $reactor\->timer(0.5 => sub {}); \& $reactor\->one_tick; \& $reactor\->remove($id); .Ve .ie n .SS """recurring""" .el .SS "\f(CWrecurring\fP" .IX Subsection "recurring" .Vb 1 \& my $id = $reactor\->recurring(0.25 => sub {...}); .Ve .PP Create a new recurring timer, invoking the callback repeatedly after a given amount of time in seconds. Meant to be overloaded in a subclass. .PP .Vb 2 \& # Invoke as soon as possible \& $reactor\->recurring(0 => sub { say \*(AqReactor tick.\*(Aq }); .Ve .ie n .SS """remove""" .el .SS "\f(CWremove\fP" .IX Subsection "remove" .Vb 2 \& my $success = $reactor\->remove($handle); \& my $success = $reactor\->remove($id); .Ve .PP Remove handle or timer. Meant to be overloaded in a subclass. .ie n .SS """start""" .el .SS "\f(CWstart\fP" .IX Subsection "start" .Vb 1 \& $reactor\->start; .Ve .PP Start watching for I/O and timer events, this will block until \f(CW\*(C`stop\*(C'\fR is called or no events are being watched anymore. Meant to be overloaded in a subclass. .ie n .SS """stop""" .el .SS "\f(CWstop\fP" .IX Subsection "stop" .Vb 1 \& $reactor\->stop; .Ve .PP Stop watching for I/O and timer events. Meant to be overloaded in a subclass. .ie n .SS """timer""" .el .SS "\f(CWtimer\fP" .IX Subsection "timer" .Vb 1 \& my $id = $reactor\->timer(0.5 => sub {...}); .Ve .PP Create a new timer, invoking the callback after a given amount of time in seconds. Meant to be overloaded in a subclass. .PP .Vb 2 \& # Invoke as soon as possible \& $reactor\->timer(0 => sub { say \*(AqNext tick.\*(Aq }); .Ve .ie n .SS """watch""" .el .SS "\f(CWwatch\fP" .IX Subsection "watch" .Vb 1 \& $reactor = $reactor\->watch($handle, $readable, $writable); .Ve .PP Change I/O events to watch handle for with \f(CW\*(C`true\*(C'\fR and \f(CW\*(C`false\*(C'\fR values, meant to be overloaded in a subclass. .PP .Vb 2 \& # 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); .Ve .SH "SEE ALSO" .IX Header "SEE ALSO" Mojolicious, Mojolicious::Guides, .