NAME

Reflex::Role::Writable - add writable-watching behavior to a class

VERSION

version 0.060

SYNOPSIS

        use Moose;

        has socket => ( is => 'rw', isa => 'FileHandle', required => 1 );

        with 'Reflex::Role::Writable' => {
                handle   => 'socket',
                cb_ready => 'on_socket_writable',
                active   => 1,
        };

        sub on_socket_writable {
                my ($self, $arg) = @_;
                print "Socket $arg->{handle} is ready for data.\n";
                $self->pause_socket_writabe();
        }

DESCRIPTION

Reflex::Role::Writable is a Moose parameterized role that adds writable-watching behavior to Reflex-based classes. In the SYNOPSIS, a filehandle named "socket" is watched for writability. The method on_socket_writable() is called when data becomes available.

TODO - Explain the difference between role-based and object-based composition.

Required Role Parameters

handle

The handle parameter must contain the name of the attribute that holds the handle to watch. The name indirection allows the role to generate methods that are unique to the handle. For example, a handle named "XYZ" would generates these methods by default:

        cb_ready      => "on_XYZ_writable",
        method_pause  => "pause_XYZ_writable",
        method_resume => "resume_XYZ_writable",
        method_stop   => "stop_XYZ_writable",

This naming convention allows the role to be used for more than one handle in the same class. Each handle will have its own name, and the mixed in methods associated with them will also be unique.

Optional Role Parameters

active

active specifies whether the Reflex::Role::Writable watcher should be enabled when it's initialized. All Reflex watchers are enabled by default. Set it to a false value, preferably 0, to initialize the watcher in an inactive or paused mode.

Writability watchers may be paused and resumed. See method_pause and method_resume for ways to override the default method names.

cb_ready

cb_ready names the $self method that will be called whenever handle has space for more data to be written. By default, it's the catenation of "on_", the handle name, and "_writable". A handle named "XYZ" will by default trigger on_XYZ_writable() callbacks.

        handle => "socket",  # on_socket_writable()
        handle => "XYZ",     # on_XYZ_writable()

All Reflex parameterized role callbacks are invoked with two parameters: $self and an anonymous hashref of named values specific to the callback. cb_ready callbacks include a single named value, handle, that contains the filehandle from which has become ready for writing.

handle is the handle itself, not the handle attribute's name.

method_pause

method_pause sets the name of the method that may be used to pause the watcher. It is "pause_${handle}_writable" by default.

method_resume

method_resume may be used to resume paused writability watchers, or to activate them if they are started in an inactive state.

method_stop

method_stop may be used to stop readability watchers. These watchers may not be restarted once they've been stopped. If you want to pause and resume watching, see method_pause and method_resume.

EXAMPLES

TODO - I'm sure there are some.

SEE ALSO

Reflex Reflex::Role::Readable Reflex::Role::Streaming

"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