Reflex::Role::PidCatcher - add async process reaping behavior to a class
This document describes version 0.100, released on April 02, 2017.
package Reflex::PID; use Moose; extends 'Reflex::Base'; has pid => ( is => 'ro', isa => 'Int', required => 1, ); has active => ( is => 'ro', isa => 'Bool', default => 1, ); with 'Reflex::Role::PidCatcher' => { pid => 'pid', active => 'active', cb_exit => 'on_exit', method_start => 'start', method_stop => 'stop', method_pause => 'pause', method_resume => 'resume', }; 1;
Reflex::Role::PidCatcher is a Moose parameterized role that adds asynchronous child process reaping behavior to Reflex based classes. The SYNOPSIS is the entire implementation of Reflex::PID, a simple class that allows Reflex::Role::PidCatcher to be used as an object.
None. All role parameters as of this writing have what we hope are sensible defaults. Please let us know if they don't seem all that sensible.
pid sets the name of an attribute that will contain the process ID to wait for. Process IDs must be integers.
pid
active specifies whether Reflex::Role::PidCatcher should be created in the active, process-watching state. All Reflex watchers are enabled by default. Set it to a false value, preferably 0, to initialize the catcher in an inactive or paused mode.
active
Process watchers may currently be paused and resumed, but this functionality may be dropped later. It's not good to leave child processes hanging. See method_pause and method_resume for ways to override the default method names.
method_pause
method_resume
cb_exit names the $self method that will be called when the child process identified in <$self-$pid()>> exits. It defaults to "on_%s_exit", where %s is the name of the PID attribute. For example, it will be "on_transcoder_exit" if the process ID is stored in a "transcoder" attribute.
cb_exit
<$self-
method_start sets the name of the method that may be used to start watching for a process exit. It's "start_%s" by default, where %s is the name of the process ID's attribute.
method_start
Reflex::Role::PidCatcher will automatically start watching for its process ID if the value of active's attribute is true.
method_stop may be used to permanently stop a process ID watcher. Stopped watchers cannot be restarted, so use method_pause if you need to temporarily disable them instead. method_resume may be used to resume them again.
method_stop
Process ID catchers will automatically stop watching for process exit upon DEMOLISH.
method_pause sets the name of the method that may be used to pause process catching. It is "pause_%s" by default, where %s is the name of the PID attribute.
method_resume sets the name of the method that may be used to resume process reaping. It is "resume_%s" by default, where %s is the name of the attribute holding the process ID.
Reflex::Role::PidCatcher was initially written to support Reflex::PID, so there aren't many examples of the role's use by itself.
Reflex::POE::Wheel::Run actualy uses Reflex::PID.
eg/eg-07-wheel-run.pl uses Reflex::POE::Wheel::Run.
Please see those modules/websites for more information related to this module.
Reflex
Reflex::Role::SigCatcher
Reflex::Signal
Reflex::Role::PidCatcher
Reflex::PID
"ACKNOWLEDGEMENTS" in Reflex
"ASSISTANCE" in Reflex
"AUTHORS" in Reflex
"BUGS" in Reflex
"CONTRIBUTORS" in Reflex
"COPYRIGHT" in Reflex
"LICENSE" in Reflex
"TODO" in Reflex
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.
Rocco Caputo <rcaputo@cpan.org>
This software is copyright (c) 2017 by Rocco Caputo.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
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/.
BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.
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To install Reflex, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Reflex
CPAN shell
perl -MCPAN -e shell install Reflex
For more information on module installation, please visit the detailed CPAN module installation guide.