NAME

Reflex::POE::Postback - Communicate with POE components expecting postbacks.

VERSION

version 0.011

SYNOPSIS

Not a complete example. Please see eg-11-poco-postback.pl in the eg directory for a complete working program.

        my $postback = Reflex::POE::Postback->new(
                $self, "on_component_result", { cookie => 123 }
        );

DESCRIPTION

Reflex::POE::Postback creates an object that's substitutes for POE::Session postbacks. When invoked, however, they sent events back to the object and method (and with optional continuation data) provided during construction.

Reflex::POE::Postback was designed to interact with POE modules that want to respond via caller-provided postbacks. Authors are encouraged to encapsulate POE interaction within Reflex objects. Most users should therefore not need use Reflex::POE::Postback (or other Reflex::POE helpers) directly.

Public Methods

new

new() constructs a new Reflex::POE::Postback object, which will be a blessed coderef following POE's postback convention.

It takes three positional parameters: the required object and method to invoke when the postback is called, and an optional context that will be passed verbatim to the callback.

Callback Parameters

context

The "context" callback parameter contains whatever was supplied to the Reflex::POE::Postback when it was created. In the case of the SYNOPSIS, that would be:

        sub on_component_result {
                my ($self, $arg) = @_;

                # Displays: 123
                print $arg->{context}{cookie}, "\n";
        }

response

"response" contains an array reference that holds whatever was passed to the postback. If we assume this postback call:

        $postback->(qw(eight six seven five three oh nine));

Then the callback might look something like this:

        sub on_component_result {
                my ($self, $arg) = @_;

                # Displays: nine
                print "$arg->{response}[-1]\n";
        }

CAVEATS

Reflex::POE::Postback must produce objects as blessed coderefs. This is something I don't know how to do yet with Moose, so Moose isn't used. Therefore, Reflex::POE::Postback doesn't do a lot of things one might expect after working with other Reflex objects.

If Moose can be used later, it may fundamentally change the entire interface. The goal is to do this only once, however.

It might be nice to map positional response parameters to named parameters. Reflex::POE::Wheel does this, but it remains to be seen whether that's considered cumbersome.

SEE ALSO

Moose::Manual::Concepts

Reflex Reflex::POE::Event Reflex::POE::Session Reflex::POE::Wheel::Run Reflex::POE::Wheel

"ACKNOWLEDGEMENTS" in Reflex "ASSISTANCE" in Reflex "AUTHORS" in Reflex "BUGS" in Reflex "BUGS" in Reflex "CONTRIBUTORS" in Reflex "COPYRIGHT" in Reflex "LICENSE" in Reflex "TODO" in Reflex

cpanm Reflex

perl -MCPAN -e shell
install Reflex