NAME

Reflex::Role::Streaming - add streaming I/O behavior to a class

VERSION

version 0.085

SYNOPSIS

        use Moose;

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

        with 'Reflex::Role::Streaming' => {
                handle    => 'socket',
                cb_data   => 'on_socket_data',    # default
                cb_error  => 'on_socket_error',   # default
                cb_closed => 'on_socket_closed',  # default
        };

        sub on_socket_data {
                my ($self, $arg) = @_;
                $self->put_socket($arg->{data});
        }

        sub on_socket_error {
                my ($self, $arg) = @_;
                print "$arg->{errfun} error $arg->{errnum}: $arg->{errstr}\n";
                $self->stopped();
        }

        sub on_socket_closed {
                my $self = shift;
                print "Connection closed.\n";
                $self->stopped();
        }

DESCRIPTION

Reflex::Role::Streaming is a Moose parameterized role that adds streaming I/O behavior to Reflex-based classes. In the SYNOPSIS, a filehandle named "socket" is turned into a NBIO stream by the addition addition of Reflex::Role::Streaming.

See Reflex::Stream if you prefer runtime composition with objects, or you just find Moose syntax difficult to handle.

Required Role Parameters

handle

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

        cb_closed   => "on_XYZ_closed",
        cb_data     => "on_XYZ_data",
        cb_error    => "on_XYZ_error",
        method_put  => "put_XYZ",

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

cb_closed

Please see "cb_closed" in Reflex::Role::Reading. Reflex::Role::Reading's "cb_closed" defines this callback.

cb_data

Please see "cb_data" in Reflex::Role::Reading. Reflex::Role::Reading's "cb_data" defines this callback.

cb_error

Please see "cb_error" in Reflex::Role::Reading. Reflex::Role::Reading's "cb_error" defines this callback.

method_put

method_put defines the name of a method that will put data octets into the stream's output buffer. The default name is "put_" followed by the streaming handle's name, such as put_XYZ().

The put method takes an array of strings of raw octets:

        my $pending_count = $self->put_XYZ(
                "raw octets here", " and some more"
        );

The put method will try to flush the stream's output buffer immediately. Any data that cannot be flushed will remain in the buffer. The streaming code will attempt to flush it later when the stream becomes writable again.

The put method returns the number of buffered octets waiting to be flushed---zero if the buffer has been synchronously flushed. If the synchronous syswrite() fails, it will invoke cb_error and return undef.

EXAMPLES

TODO - I'm sure there are some.

SEE ALSO

Reflex Reflex::Role::Readable Reflex::Role::Writable Reflex::Stream

"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