MediaWiki  master
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1 <?php
29 abstract class RevisionListBase extends ContextSource implements Iterator {
31  public $title;
34  protected $ids;
37  protected $res;
40  protected $current;
48  $this->setContext( $context );
49  $this->title = $title;
50  }
56  function filterByIds( array $ids ) {
57  $this->ids = $ids;
58  }
65  public function getType() {
66  return null;
67  }
72  protected function initCurrent() {
73  $row = $this->res->current();
74  if ( $row ) {
75  $this->current = $this->newItem( $row );
76  } else {
77  $this->current = false;
78  }
79  }
85  public function reset() {
86  if ( !$this->res ) {
87  $this->res = $this->doQuery( wfGetDB( DB_REPLICA ) );
88  } else {
89  $this->res->rewind();
90  }
91  $this->initCurrent();
92  return $this->current;
93  }
95  public function rewind() {
96  $this->reset();
97  }
103  public function current() {
104  return $this->current;
105  }
111  public function next() {
112  $this->res->next();
113  $this->initCurrent();
114  return $this->current;
115  }
117  public function key() {
118  return $this->res ? $this->res->key() : 0;
119  }
121  public function valid() {
122  return $this->res ? $this->res->valid() : false;
123  }
129  public function length() {
130  if ( !$this->res ) {
131  return 0;
132  } else {
133  return $this->res->numRows();
134  }
135  }
141  abstract public function doQuery( $db );
147  abstract public function newItem( $row );
148 }
The wiki should then use memcached to cache various data To use multiple just add more items to the array To increase the weight of a make its entry a array("", 2))
setContext(IContextSource $context)
Get the internal type name of this list.
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
Initialise the current iteration pointer.
The simplest way of implementing IContextSource is to hold a RequestContext as a member variable and ...
ResultWrapper bool $res
wfGetDB( $db, $groups=[], $wiki=false)
Get a Database object.
Start iteration.
Get the current list item, or false if we are at the end.
__construct(IContextSource $context, Title $title)
Construct a revision list for a given title.
bool Revision $current
IContextSource $context
List for revision table items for a single page.
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that When $user is not null
Definition: hooks.txt:780
Move the iteration pointer to the next list item, and return it.
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
doQuery( $db)
Do the DB query to iterate through the objects.
filterByIds(array $ids)
Select items only where the ID is any of the specified values.
Definition: defines.php:25
Get the number of items in the list.
newItem( $row)
Create an item object from a DB result row.