Perl Object Environment: Difference between revisions

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{{essay-like|date=October 2018}}

{{overly detailed|date=October 2018}}

{{manualhow-to|article|date=January 2017}}

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The '''Perl Object Environment''' ('''POE''') is a [[library (computing)|library]] of Perl modules written in the [[Perl]] [[programming language]] by [[Rocco Caputo]] et al.

From CPAN:

:''"POE originally was developed as the core of a persistent object server and runtime environment. It has evolved into a general purpose multitasking and networking framework, encompassing and providing a consistent interface to other event [[Programevent loops|loopsloop]]s such as Event and the [[Tk (software)|Tk]] and [[GTK|Gtk]] toolkits."''

==Architecture and layers of abstraction ==

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The POE::Kernel namespace contains a suite of functions which are plugged into the kernel itself. These loop abstractions are designed after POE's standardized event loop bridge interface - '''POE::Loop'''. These can be mixed and matched as needed to provide runtime services and a lean facility for [[interprocess communication]]. The basic functions are '''POE::Loop::Event''', '''POE::Loop::Poll''' and '''POE::Loop::Select'''. Also available are '''POE::Loop::Tk''' and '''POE::Loop::Gtk''' which offer hooks into other loop bridges in the external environment. If that isn't enough, the POE::Loop kernel abstraction provides reusable signal callbacks, time or alarm callbacks, and filehandle activity callbacks as well as administrative functions such as initializing, executing, and finalizing event loops.

There is also a higher level packaging framework - POE::Macro and a debugging utility for testing them called POE::Preprocessor. This framework has yielded '''POE::Macro::UseBytes'''.

:NOTE: As the Perl tradition mandates, POE is also a moving target.

Always check [[CPAN]] to see what new goodies the community has placed in the archive.