MediaWiki  1.33.0
IDBAccessObject.php
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1 <?php
55 interface IDBAccessObject {
58  const READ_NORMAL = 0;
59 
61  const READ_LATEST = 1;
62 
63  /* @var int Read from the master/quorum and lock out other writers */
64  const READ_LOCKING = self::READ_LATEST | 2; // READ_LATEST (1) and "LOCK IN SHARE MODE" (2)
65 
67  const READ_EXCLUSIVE = self::READ_LOCKING | 4; // READ_LOCKING (3) and "FOR UPDATE" (4)
68 
70  const READ_LATEST_IMMUTABLE = 8;
71 
72  // Convenience constant for tracking how data was loaded (higher => higher QoS)
73  const READ_NONE = -1; // not loaded yet (or the object was cleared)
74 }
IDBAccessObject
Interface for database access objects.
Definition: IDBAccessObject.php:55
php
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
IDBAccessObject\READ_LOCKING
const READ_LOCKING
Constants for object loading bitfield flags (higher => higher QoS)
Definition: IDBAccessObject.php:64
IDBAccessObject\READ_NONE
const READ_NONE
Definition: IDBAccessObject.php:73