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.
- new()
- Constructor. Does nothing by itself, doesn't read pidfile and doesn't try
to create pid dir.
- is_empty()
- Check if pid dir doesn't exist yet.
- init()
- Create pid dir. After this method is called,
is_empty() will start to return false value.
- read()
- Read daemon info from pidfile.
Returns undef if pidfile not found. Throws exceptions when
content is invalid.
- lock() =item
lock($timeout)
- Acquire piddir lock. Lock will be nonblocking unless 'timeout' parameter
is set.
- remove()
- 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({ pid =
$pid, guid => $guid })>
- Write guardian pid and guid into the pidfile.
Vyacheslav Matyukhin <mmcleric@yandex-team.ru>
This software is copyright (c) 2016 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.