NAME
Message::Passing:Role::Script - Handy role for building messaging scripts.
SYNOPSIS
# my_message_passer.pl
package My::Message::Passer;
use Moo;
use MooX::Options;
use MooX::Types::MooseLike::Base qw/ Bool /;
use Message::Passing::DSL;
with 'Message::Passing::Role::Script';
option foo => (
is => 'ro',
isa => Bool,
);
sub build_chain {
my $self = shift;
message_chain {
input example => ( output_to => 'test_out', .... );
output test_out => ( foo => $self->foo, ... );
};
}
__PACKAGE__->start unless caller;
1;DESCRIPTION
This role can be used to make simple message passing scripts.
The user implements a MooX::Options type script class, with a build_chain method, that builds one or more Message::Passing chains and returns them.
__PACKAGE__->start unless caller;is then used before the end of the script.
This means that when the code is run as a script, it'll parse the command line options, and start a message passing server..
REQUIRED METHODS
build_chain
Return a chain of message processors, or an array reference with multiple chains of message processors.
ATTRIBUTES
daemonize
Do a double fork and lose controlling terminal.
Used to run scripts in the background.
io_priority
The IO priority to run the script at..
Valid values for the IO priority are:
- none
- be
- rt
- idle
user
Changes the user the script is running as. You probably need to run the script as root for this option to work.
pid_file
Write a pid file out. Useful for running Message::Passing scripts as daemons and/or from init.d scripts.
METHODS
start
Called as a class method, it will build the current class as a command line script (parsing ARGV), setup the daemonization options, call the ->build_chain method supplied by the user to build the chains needed for this application.
Then enters the event loop and never returns.
change_uid_if_needed
Tries to change uid if the --user option has been supplied
deamonize_if_needed
Tires to daemonize if the --daemonize option has been supplied
set_io_priority_if_needed
Tries to set the process' IO priority if the --io_priority option has been supplied.
SPONSORSHIP
This module exists due to the wonderful people at Suretec Systems Ltd. <http://www.suretecsystems.com/> who sponsored its development for its VoIP division called SureVoIP <http://www.surevoip.co.uk/> for use with the SureVoIP API - <http://www.surevoip.co.uk/support/wiki/api_documentation>
AUTHOR, COPYRIGHT AND LICENSE
See Message::Passing.