#  File: Stem/Test/Echo.pm

#  This file is part of Stem.
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package Stem::Test::Echo ;

use strict ;

my $attr_spec = [ { } ];

sub new {

	my( $class ) = shift ;

	my $self = Stem::Class::parse_args( $attr_spec, @_ ) ;
	return $self unless ref $self ;

	return $self ;
}

# send general messages to test default delivery speed

sub msg_in {

	my ( $self, $msg ) = @_ ;

	my $reply_msg = $msg->reply() ;

	$reply_msg->dispatch() ;

        return ;
}

# send an 'echo' type to test plain reply speed

sub echo_in {

	my ( $self, $msg ) = @_ ;

#print $msg->dump( 'ECHO' ) ;

# 	$self->{'reply_msg'} ||= $msg->reply() ;

# 	$self->{'reply_msg'}->dispatch() ;

	$msg->reply()->dispatch() ;

        return ;
}

# send an 'echo_data' type to test reply with data

sub echo_data_in {

	my ( $self, $msg ) = @_ ;

	my $data = $msg->data() ;

	my $reply_msg = $msg->reply( data => { echo => $data } ) ;

	$reply_msg->dispatch() ;

        return ;
}

# send an 'echo' command to test plain command speed

sub echo_cmd {

	my ( $self ) = @_ ;

        return '' ;
}

# send an 'echo_data' command to test command speed with data

sub echo_data_cmd {

	my ( $self, $msg ) = @_ ;

	my $data = $msg->data() ;

        return $data ;
}

1 ;

__END__

=pod

=head1 NAME

Stem::Test::Echo - This cell accepts messages and sends back reply
messages or command data. It can be used to test message receipt,
replies, and command returns and to benchmark message throughput.

=head1 SYNOPSIS

  [
          'class'	=>	'Stem::Test::Echo',
          'name'	=>	'test_echo',
  ],

=head1 USAGE

This cell accepts various messages, all of which will echo some
message back to the sender.

	An echo type message will do a reply with no data.

	An echo_data type message will do a reply with the sent data.

	An echo command message will return a null string.

	An echo_data command message will return the data.

	Any other message type or command will do a plain reply like
	an 'echo' type message.

=cut