bionic (3) KiokuDB::Linker.3pm.gz

NAME

       KiokuDB::Linker - Relinks live objects from storage entries

VERSION

       version 0.57

SYNOPSIS

           # mostly internal

DESCRIPTION

       The linker reconnects entry data, recreating the connected object graph in memory.

       The linkage process starts with an ID (or several IDs) to be loaded passed to the "get_or_load_objects"
       method.

       This ID will first be searched for in the live object set (KiokuDB::LiveObjects). If the object is
       already live, then it will be returned as is.

       If the object is not live, then the corresponding entry is fetched from the backend, and expanded into an
       actual instance.

       Expansion consults the KiokuDB::TypeMap using KiokuDB::TypeMap::Resolver, to find the correct typemap
       entry (see "COLLAPSING STRATEGIES" in KiokuDB::Collapser and KiokuDB::TypeMap), and that is used for the
       actual expansion.

       Most of the grunt work is delegated by the entries back to the linker using the "inflate_data" method,
       which handles circular structures, retrying of tied structures, etc.

       Inflated objects are registered with KiokuDB::LiveObjects, and get inserted into the current live object
       scope (KiokuDB::LiveObjects::Scope). The scope's job is to maintain a reference count of at least 1 for
       any loaded object, until it is destroyed itself. This ensures that weak references are not destroyed
       prematurely, but allows their use in order to avoid memory leaks.

AUTHOR

       Yuval Kogman <nothingmuch@woobling.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2014 by Yuval Kogman, Infinity Interactive.

       This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5
       programming language system itself.