46 unset(
$params[
'reportDupes'] );
50 $this->backend = $backend;
51 $this->attrMap = $backend->attrMap;
54 public function get( $key, $flags = 0 ) {
55 $ret = parent::get( $key, $flags );
56 if (
$ret ===
false && !$this->
hasKey( $key ) ) {
57 $ret = $this->backend->get( $key, $flags );
58 $this->
set( $key,
$ret, 0, self::WRITE_CACHE_ONLY );
63 public function set( $key,
$value, $exptime = 0, $flags = 0 ) {
64 parent::set( $key,
$value, $exptime, $flags );
65 if ( !( $flags & self::WRITE_CACHE_ONLY ) ) {
66 $this->backend->set( $key,
$value, $exptime, $flags & ~self::WRITE_CACHE_ONLY );
71 public function delete( $key, $flags = 0 ) {
72 parent::delete( $key, $flags );
73 if ( !( $flags & self::WRITE_CACHE_ONLY ) ) {
74 $this->backend->delete( $key );
81 parent::setDebug( $bool );
82 $this->backend->setDebug( $bool );
86 parent::deleteObjectsExpiringBefore( $date, $progressCallback );
87 return $this->backend->deleteObjectsExpiringBefore( $date, $progressCallback );
91 return $this->backend->makeKeyInternal( ...func_get_args() );
94 public function makeKey( $class, $component =
null ) {
95 return $this->backend->makeKey( ...func_get_args() );
99 return $this->backend->makeGlobalKey( ...func_get_args() );
105 public function add( $key,
$value, $exptime = 0, $flags = 0 ) {
106 if ( $this->
get( $key ) ===
false ) {
107 return $this->
set( $key,
$value, $exptime, $flags );
114 $n = $this->backend->incr( $key,
$value );
115 parent::delete( $key );
120 public function lock( $key, $timeout = 6, $expiry = 6, $rclass =
'' ) {
121 return $this->backend->lock( $key, $timeout, $expiry, $rclass );
125 return $this->backend->unlock( $key );
129 return $this->backend->getLastError();
133 return $this->backend->clearLastError();
Class representing a cache/ephemeral data store.
Wrapper around a BagOStuff that caches data in memory.
__construct(BagOStuff $backend, $params=[])
getLastError()
Get the "last error" registered; clearLastError() should be called manually.
unlock( $key)
Release an advisory lock on a key string.
lock( $key, $timeout=6, $expiry=6, $rclass='')
Acquire an advisory lock on a key string.
clearLastError()
Clear the "last error" registry.
makeGlobalKey( $class, $component=null)
Make a global cache key.
makeKeyInternal( $keyspace, $args)
Construct a cache key.
incr( $key, $value=1)
Increase stored value of $key by $value while preserving its TTL.
add( $key, $value, $exptime=0, $flags=0)
Insert an item if it does not already exist.
makeKey( $class, $component=null)
Make a cache key, scoped to this instance's keyspace.
deleteObjectsExpiringBefore( $date, $progressCallback=false)
Delete all objects expiring before a certain date.
Simple store for keeping values in an associative array for the current process.
hasKey( $key)
Does this bag have a non-null value for the given key?
null means default in associative array with keys and values unescaped Should be merged with default with a value of false meaning to suppress the attribute in associative array with keys and values unescaped noclasses & $ret
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