Ubic::Daemon::PidState - internal object representing process info stored on disk
This is considered to be a non-public class. Its interface is subject to change without notice.
Constructor. Does nothing by itself, doesn't read pidfile and doesn't try to create pid dir.
Check if pid dir doesn't exist yet.
Create pid dir.
After tihs method is called,
is_empty() will start to return false value.
Read daemon info from pidfile.
Returns undef if pidfile not found. Throws exceptions when content is invalid.
Acquire piddir lock. Lock will be nonblocking unless 'timeout' parameter is set.
Remove the pidfile from the piddir.
is_empty() will still return false.
This method should be called only after lock is acquired via
lock() method (TODO - check before removing?).
Write guardian pid and guid into the pidfile.
Vyacheslav Matyukhin <email@example.com>
This software is copyright (c) 2013 by Yandex LLC.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.