Event::RPC::Loop3pm

Usage

  use Event::RPC::Server;
  use Event::RPC::Loop::Glib;
  
  my $server = Event::RPC::Server->new (
      ...
      loop => Event::RPC::Loop::Glib->new(),
      ...
  );
  $server->start;

Overview

This modules defines the interface of Event::RPC's mainloop abstraction layer. It's a virtual class all mainloop modules should inherit from.

Interface

The following methods need to be implemented:

$loop->enter ()

Enter resp. start a mainloop.

$loop->leave ()

Leave the mainloop, which was started with the enter() method.

$watcher = $loop->add_io_watcher ( %options )

Add an I/O watcher. Options are passed as a hash of key/value pairs. The following options are known:

fh

The filehandle to be watched.

cb

This callback is called, without any parameters, if an event occurred on the filehandle above.

desc

A description of the watcher. Not necessarily implemented by all modules, so it may be ignored.

poll

Either 'r', if your program reads from the filehandle, or 'w' if it writes to it.

A watcher object is returned. What this exactly is depends on the implementation, so you can't do anything useful with it besides passing it back to del_io_watcher().

$loop->del_io_watcher ( $watcher )

Deletes an I/O watcher which was added with $loop->add_io_watcher().

$timer = $loop->add_timer ( %options )

This sets a timer, a subroutine called after a specific timeout or on a regularly basis with a fixed time interval.

Options are passed as a hash of key/value pairs. The following options are known:

interval

A time interval in seconds, may be fractional.

after

Callback is called once after this amount of seconds, may be fractional.

cb

The callback.

desc

A description of the timer. Not necessarily implemented by all modules, so it may be ignored.

A timer object is returned. What this exactly is depends on the implementation, so you can't do anything useful with it besides passing it back to del_io_timer().

$loop->del_timer ( $timer )

Deletes a timer which was added with $loop->add_timer().

Direct usage in your server

You may use the methods of Event::RPC::Loop by yourself if you like. This way your program keeps independent of the actual mainloop module in use, if the simplified interface of Event::RPC::Loop is sufficient for you.

In your server program you access the actual mainloop object this way:

  my $loop = Event::RPC::Server->instance->get_loop;

Naturally nothing speaks against making your program to work only with a specific mainloop implementation, if you need its features. In that case you may use the corresponding API directly (e.g. of Event or Glib), no need to access it through Event::RPC::Loop.

Copyright and license

Copyright (C) 2005-2015 by Jörn Reder <joern AT zyn.de>.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.