NAME Deeme - a Database-agnostic driven Event Emitter SYNOPSIS package Cat; use Deeme::Obj 'Deeme'; use Deeme::Backend::Meerkat; # app1.pl package main; # Subscribe to events in an application (thread, fork, whatever) my $tiger = Cat->new(backend=> Deeme::Backend::Meerkat->new(...) ); #or you can just do Deeme->new $tiger->on(roar => sub { my ($tiger, $times) = @_; say 'RAWR!' for 1 .. $times; }); ... #then, later in another application # app2.pl my $tiger = Cat->new(backend=> Deeme::Backend::Meerkat->new(...)); $tiger->emit(roar => 3); DESCRIPTION Deeme is a database-agnostic driven event emitter base-class. Deeme allows you to define binding subs on different points in multiple applications, and execute them later, in another worker. It is handy if you have to attach subs to events that are delayed in time and must be fixed. It is strongly inspired by (and a rework of) Mojo::EventEmitter. EVENTS Deeme can emit the following events. error $e->on(error => sub { my ($e, $err) = @_; ... }); Emitted for event errors, fatal if unhandled. $e->on(error => sub { my ($e, $err) = @_; say "This looks bad: $err"; }); METHODS Deeme inherits all methods from Deeme::Obj and implements the following new ones. catch $e = $e->catch(sub {...}); Subscribe to "error" event. # Longer version $e->on(error => sub {...}); emit $e = $e->emit('foo'); $e = $e->emit('foo', 123); Emit event. reset $e = $e->reset; Delete all events on the backend. emit_safe $e = $e->emit_safe('foo'); $e = $e->emit_safe('foo', 123); Emit event safely and emit "error" event on failure. has_subscribers my $bool = $e->has_subscribers('foo'); Check if event has subscribers. on my $cb = $e->on(foo => sub {...}); Subscribe to event. $e->on(foo => sub { my ($e, @args) = @_; ... }); once my $cb = $e->once(foo => sub {...}); Subscribe to event and unsubscribe again after it has been emitted once. $e->once(foo => sub { my ($e, @args) = @_; ... }); subscribers my $subscribers = $e->subscribers('foo'); All subscribers for event. # Unsubscribe last subscriber $e->unsubscribe(foo => $e->subscribers('foo')->[-1]); unsubscribe $e = $e->unsubscribe('foo'); $e = $e->unsubscribe(foo => $cb); Unsubscribe from event. DEBUGGING You can set the "DEEME_DEBUG" environment variable to get some advanced diagnostics information printed to "STDERR". DEEME_DEBUG=1 AUTHOR mudler COPYRIGHT Copyright 2014- mudler LICENSE This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO Deeme::Backend::Memory, Deeme::Backend::Mango, Deeme::Backend::Meerkat, Mojo::EventEmitter, Mojolicious