NAME

Reflex::Role::Connecting - add non-blocking client connecting to a class

VERSION

This document describes version 0.100, released on April 02, 2017.

SYNOPSIS

        package Reflex::Connector;

        use Moose;
        extends 'Reflex::Base';

        has socket => (
                is        => 'rw',
                isa       => 'FileHandle',
        );

        has port => (
                is => 'ro',
                isa => 'Int',
        );

        has address => (
                is      => 'ro',
                isa     => 'Str',
                default => '127.0.0.1',
        );
TODO - Changed.
        with 'Reflex::Role::Connecting' => {
                connector   => 'socket',      # Default!
                address     => 'address',     # Default!
                port        => 'port',        # Default!
                cb_success  => 'on_connection',
                cb_error    => 'on_error',
        };

        1;

DESCRIPTION

Reflex::Role::Connecting is a Moose parameterized role that adds non-blocking connect() behaviors to classes.

See Reflex::Connector if you prefer runtime composition with objects, or if Moose syntax just gives you the willies.

"address" defines the attribute that will contain the address to which the class will connect. The address() attribute will be used if the class doesn't override the name. The default address will be the IPv4 localhost, "127.0.0.1".

port

"port" defines the attribute that will contain the port to which this role will connect. By default, the role will use the port() attribute. There is no default port() value.

socket

The "socket" parameter must contain the name of an attribute that contains the connecting socket handle. "socket" will be used if a name isn't provided. A "socket" must be provided if two or more client connections will be created from the same class, otherwise they will both attempt to use the same "socket".

Reflex::Role::Connecting will create a plain TCP socket if "socket"'s attribute is empty at connecting time. A class may build its own socket, if it needs to set special options.

The role will generate additional methods and callbacks that are named after "socket". For example, if "socket" contains XYZ, then the default error callback will be on_XYZ_error().

cb_success

"cb_success" overrides the default name for the class's successful connection handler method. This handler will be called whenever a client connection is successfully connected.

The default method name is "on_${socket}_success", where $socket is the name of the socket attribute.

The role defines a default "on_${socket}_success" callback that emits an event with the callback's parameters. The default event is the "socket" name followed by "_success", as in "XYZ_success".

The role's "ev_success" parameter changes the name of the success event to be emitted.

All callback methods receive two parameters: $self and an anonymous hash containing information specific to the callback. In "cb_success"'s case, the anonymous hash contains one value: the socket that has just established a connection.

cb_error

"cb_error" names the $self method that will be called whenever connect() encounters an error. By default, this method will be the catenation of "on_", the "socket" name, and "_error". As in on_XYZ_error(), if the socket attribute is named "XYZ".

The role defines a default callback that will emit an event with cb_error()'s parameters. The default event is the "socket" name followed by "_error". For example, "XYZ_error". The role's "ev_error" parameter changes the event to be emitted.

"cb_error" callbacks receive two parameters, $self and an anonymous hashref of named values specific to the callback. Reflex error callbacks include three standard values. "errfun" contains a single word description of the function that failed. "errnum" contains the numeric value of $! at the time of failure. "errstr" holds the stringified version of $!.

Values of $! are passed as parameters since the global variable may change before the callback can be invoked.

When overriding this callback, please be sure to call stopped(), which is provided by Reflex::Role::Collectible. Calling stopped() is vital for collectible objects to be released from memory when managed by Reflex::Collection.

EXAMPLES

TODO - I'm sure there are some.

BUGS AND LIMITATIONS

You can make new bug reports, and view existing ones, through the web interface at <http://rt.cpan.org/Public/Dist/Display.html?Name=Reflex>.

AUTHOR

Rocco Caputo <rcaputo@cpan.org>

COPYRIGHT AND LICENSE

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

AVAILABILITY

The latest version of this module is available from the Comprehensive Perl Archive Network (CPAN). Visit <http://www.perl.com/CPAN/> to find a CPAN site near you, or see <https://metacpan.org/module/Reflex/>.

DISCLAIMER OF WARRANTY

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