Protocol::Sys::Virt - Abstract LibVirt protocol implementation
v10.3.13
Based on LibVirt tag v10.3.0
The first two numbers follow the LibVirt release numbering (and thus API version); the last digit indicates the sequence number of releases of this library.
This distribution implements the mechanics of the LibVirt protocol. With it, client and server components can be built, although it's unlikely anyone would want to build a LibVirt compatible server.
Rationale behind the creation of this distribution is that it allows for the imlpementation of a truely asynchronous interface to LibVirt; a property Sys::Virt doesn't have, even when using its event loop integration. After having implemented Sys::Virt::IO::Async, the invocations to the methods in Sys::Virt turned out to be blocking regardless. The LibVirt development team explained this is by design. The solution in e.g. Python is to use threading (the same solution as used with Python): the underlying protocol and handling on the server is asynchronous, but the API calls are not. Unfortunately, in Perl, threading isn't a viable option: first of all because using Perl threads is highly discouraged, but more so because each thread creates its own Perl interpreter with its own copies of all variables -- a clear difference with Python, where a single interpreter is used for all threads, sharing variables and values.
The LibVirt project describes the stability guarantees of the protocol at https://libvirt.org/support.html#rpc-protocol.
Write documentation
Erik Huelsmann
<ehuels@gmail.com>
Copyright (c) 2024, Erik Huelsmann <ehuels@gmail.com>. All rights reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
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.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.