MediaWiki  REL1_31
IExpiringStore.php
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1 <?php
31 interface IExpiringStore {
32  // Constants for TTL values, in seconds
33  const TTL_SECOND = 1;
34  const TTL_MINUTE = 60;
35  const TTL_HOUR = 3600;
36  const TTL_DAY = 86400; // 24 * 3600
37  const TTL_WEEK = 604800; // 7 * 24 * 3600
38  const TTL_MONTH = 2592000; // 30 * 24 * 3600
39  const TTL_YEAR = 31536000; // 365 * 24 * 3600
40 
41  // Shorthand process cache TTLs (useful for web requests and CLI mode)
42  const TTL_PROC_SHORT = 3; // reasonably strict cache time that last the life of quick requests
43  const TTL_PROC_LONG = 30; // loose cache time that can survive slow web requests
44 
45  const TTL_INDEFINITE = 0;
46 
47  // Attribute and QoS constants; higher QOS values with the same prefix rank higher...
48  // Medium attributes constants related to emulation or media type
49  const ATTR_EMULATION = 1;
50  const QOS_EMULATION_SQL = 1;
51  // Medium attributes constants related to replica consistency
52  const ATTR_SYNCWRITES = 2; // SYNC_WRITES flag support
53  const QOS_SYNCWRITES_NONE = 1; // replication only supports eventual consistency or less
54  const QOS_SYNCWRITES_BE = 2; // best effort synchronous with limited retries
55  const QOS_SYNCWRITES_QC = 3; // write quorum applied directly to state machines where R+W > N
56  const QOS_SYNCWRITES_SS = 4; // strict-serializable, nodes refuse reads if possible stale
57  // Generic "unknown" value that is useful for comparisons (e.g. always good enough)
58  const QOS_UNKNOWN = INF;
59 }
IExpiringStore\QOS_SYNCWRITES_SS
const QOS_SYNCWRITES_SS
Definition: IExpiringStore.php:56
IExpiringStore\QOS_EMULATION_SQL
const QOS_EMULATION_SQL
Definition: IExpiringStore.php:50
IExpiringStore\TTL_SECOND
const TTL_SECOND
Definition: IExpiringStore.php:33
IExpiringStore\TTL_MINUTE
const TTL_MINUTE
Definition: IExpiringStore.php:34
IExpiringStore\QOS_SYNCWRITES_QC
const QOS_SYNCWRITES_QC
Definition: IExpiringStore.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:37
IExpiringStore\ATTR_EMULATION
const ATTR_EMULATION
Definition: IExpiringStore.php:49
IExpiringStore
Generic base class for storage interfaces.
Definition: IExpiringStore.php:31
IExpiringStore\TTL_DAY
const TTL_DAY
Definition: IExpiringStore.php:36
IExpiringStore\TTL_INDEFINITE
const TTL_INDEFINITE
Definition: IExpiringStore.php:45
IExpiringStore\QOS_SYNCWRITES_BE
const QOS_SYNCWRITES_BE
Definition: IExpiringStore.php:54
IExpiringStore\TTL_MONTH
const TTL_MONTH
Definition: IExpiringStore.php:38
IExpiringStore\QOS_UNKNOWN
const QOS_UNKNOWN
Definition: IExpiringStore.php:58
IExpiringStore\TTL_PROC_SHORT
const TTL_PROC_SHORT
Definition: IExpiringStore.php:42
IExpiringStore\ATTR_SYNCWRITES
const ATTR_SYNCWRITES
Definition: IExpiringStore.php:52
IExpiringStore\TTL_WEEK
const TTL_WEEK
Definition: IExpiringStore.php:37
IExpiringStore\TTL_HOUR
const TTL_HOUR
Definition: IExpiringStore.php:35
IExpiringStore\TTL_YEAR
const TTL_YEAR
Definition: IExpiringStore.php:39
IExpiringStore\QOS_SYNCWRITES_NONE
const QOS_SYNCWRITES_NONE
Definition: IExpiringStore.php:53
IExpiringStore\TTL_PROC_LONG
const TTL_PROC_LONG
Definition: IExpiringStore.php:43