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POE-Component-WWW-Google-Calculator-0.03
River stage one • 2 direct dependents • 2 total dependents
/ POE::Component::WWW::Google::Calculator

NAME

POE::Component::WWW::Google::Calculator - A non-blocking POE wrapper around WWW::Google::Calculator

SYNOPSIS

use strict;
use warnings;

use POE qw(Component::WWW::Google::Calculator);

my $poco = POE::Component::WWW::Google::Calculator->spawn( alias => 'calc' );

POE::Session->create(
    package_states => [
        'main' => [ qw( _start calc_result ) ],
    ],
);

$poe_kernel->run;

sub _start {
    $poe_kernel->alias_set('foo');
    $poe_kernel->post( 'calc' => 'calc' => {
            term => '2+2',
            event => 'calc_result',
            session => 'foo',
            _random_name => 'random_value',
        }
    );
}

sub calc_result {
    my ( $kernel, $result ) = @_[ KERNEL, ARG0 ];

    if ( $result->{error} ) {
        print "ZOMG! Error: $result->{error}\n";
    }
    else {
        print "Results: $result->{out}\n";
    }

    print "Oh, and BTW: $result->{_random_name}\n";

    $kernel->post( 'calc' => 'shutdown' );
}

DESCRIPTION

This module is a simple non-blocking POE wrapper around WWW::Google::Calculator

CONSTRUCTOR

my $poco = POE::Component::WWW::Google::Calculator->spawn;

POE::Component::WWW::Google::Calculator->spawn( alias => 'calc' );

Takes three optional arguments:

alias

POE::Component::WWW::Google::Calculator->spawn( alias => 'calc' );

Specifies a POE Kernel alias for the component

options

POE::Component::WWW::Google::Calculator->spawn(
    options => {
        trace => 1,
        default => 1,
    },
);

A hashref of POE Session options to pass to the component's session.

debug

POE::Component::WWW::Google::Calculator->spawn( debug => 1 );

When set to a true value turns on output of debug messages.

METHODS

These are the object-oriented methods of the components.

calc

$poco->calc( {
        term  => '2+2',
        event => 'calc_result',
    }
);

Takes hashref of options. See calc event below for description.

session_id

my $calc_id = $poco->session_id;

Takes no arguments. Returns component's session ID.

shutdown

$poco->shutdown;

Takes no arguments. Shuts down the component.

ACEPTED EVENTS

calc

$poe_kernel->post( 'calc' => 'calc' => {
        term          => '2+2',
        event         => 'calc_result',
        session       => $some_other_session,
        _user_defined => $whatever,
    }
);

Instructs the component to do a calculation. Options are passed in a hashref with keys as follows:

term

{ term => '2+2' }

Mandatory. The term you wish to solve. Whatever Google's calculator would take. Such as '2*2+2' or '2USD in CAD'

event

{ event => 'calc_result' }

Mandatory. An event to send the result to.

session

{ session => $some_other_session_ref }

{ session => 'some_alias' }

{ session => $session->ID }

Optional. An alternative session alias, reference or ID that the response should be sent to, defaults to sending session.

user defined

Optional. Any keys starting with _ (underscore) will not affect the component and will be passed back in the result intact.

shutdown

$poe_kernel->post( 'calc' => 'shutdown' );

Takes no arguments. Tells the component to shut itself down.

OUTPUT

sub calc_result {
    my ( $kernel, $result ) = @_[ KERNEL, ARG0 ];

    if ( $result->{error} ) {
        print "ZOMG! Error: $result->{error}\n";
    }
    else {
        print "Results: $result->{out}\n";
    }

    print "Oh, and BTW: $result->{_random_name}\n";

    $kernel->post( 'calc' => 'shutdown' );
}

The result will be posted to the event and (optional) session specified in the arguments to the calc (event or method). The result, in the form of a hashref, will be passed in ARG0. The keys of that hashref are as follows

out

print "Results: $result->{out}\n";

The out key will contain the result of the "calculation" in scalar form. If an error occured it will be undefined and error key will also be present.

error

if ( $result->{error} ) {
    print "Error calculating :( $result->{error}\n";
}
else {
    print "Result: $result->{out}\n";
}

If an error occured during the calculation the error key will be present with possibly meaningful description of the error.

user defined

print "$result->{_name}, the answer is $result->{out}\n";

Any arguments beginning with _ (underscore) passed into the calc event/method will be present intact in the result.

PREREQUISITES

Needs POE and WWW::Google::Calculator

SEE ALSO

POE WWW::Google::Calculator

AUTHOR

Zoffix Znet, <zoffix at cpan.org> (http://zoffix.com, http://haslayout.net)

BUGS

Please report any bugs or feature requests to bug-poe-component-www-google-calculator at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=POE-Component-WWW-Google-Calculator. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

perldoc POE::Component::WWW::Google::Calculator

You can also look for information at:

COPYRIGHT & LICENSE

Copyright 2008 Zoffix Znet, all rights reserved.

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