MediaWiki  1.23.2
MemcachedPeclBagOStuff.php
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1 <?php
30 
46  function __construct( $params ) {
48 
49  if ( $params['persistent'] ) {
50  // The pool ID must be unique to the server/option combination.
51  // The Memcached object is essentially shared for each pool ID.
52  // We can only reuse a pool ID if we keep the config consistent.
53  $this->client = new Memcached( md5( serialize( $params ) ) );
54  if ( count( $this->client->getServerList() ) ) {
55  wfDebug( __METHOD__ . ": persistent Memcached object already loaded.\n" );
56  return; // already initialized; don't add duplicate servers
57  }
58  } else {
59  $this->client = new Memcached;
60  }
61 
62  if ( !isset( $params['serializer'] ) ) {
63  $params['serializer'] = 'php';
64  }
65 
66  if ( isset( $params['retry_timeout'] ) ) {
67  $this->client->setOption( Memcached::OPT_RETRY_TIMEOUT, $params['retry_timeout'] );
68  }
69 
70  if ( isset( $params['server_failure_limit'] ) ) {
71  $this->client->setOption( Memcached::OPT_SERVER_FAILURE_LIMIT, $params['server_failure_limit'] );
72  }
73 
74  // The compression threshold is an undocumented php.ini option for some
75  // reason. There's probably not much harm in setting it globally, for
76  // compatibility with the settings for the PHP client.
77  ini_set( 'memcached.compression_threshold', $params['compress_threshold'] );
78 
79  // Set timeouts
80  $this->client->setOption( Memcached::OPT_CONNECT_TIMEOUT, $params['connect_timeout'] * 1000 );
81  $this->client->setOption( Memcached::OPT_SEND_TIMEOUT, $params['timeout'] );
82  $this->client->setOption( Memcached::OPT_RECV_TIMEOUT, $params['timeout'] );
83  $this->client->setOption( Memcached::OPT_POLL_TIMEOUT, $params['timeout'] / 1000 );
84 
85  // Set libketama mode since it's recommended by the documentation and
86  // is as good as any. There's no way to configure libmemcached to use
87  // hashes identical to the ones currently in use by the PHP client, and
88  // even implementing one of the libmemcached hashes in pure PHP for
89  // forwards compatibility would require MWMemcached::get_sock() to be
90  // rewritten.
91  $this->client->setOption( Memcached::OPT_LIBKETAMA_COMPATIBLE, true );
92 
93  // Set the serializer
94  switch ( $params['serializer'] ) {
95  case 'php':
96  $this->client->setOption( Memcached::OPT_SERIALIZER, Memcached::SERIALIZER_PHP );
97  break;
98  case 'igbinary':
99  if ( !Memcached::HAVE_IGBINARY ) {
100  throw new MWException( __CLASS__ . ': the igbinary extension is not available ' .
101  'but igbinary serialization was requested.' );
102  }
103  $this->client->setOption( Memcached::OPT_SERIALIZER, Memcached::SERIALIZER_IGBINARY );
104  break;
105  default:
106  throw new MWException( __CLASS__ . ': invalid value for serializer parameter' );
107  }
108  $servers = array();
109  foreach ( $params['servers'] as $host ) {
110  $servers[] = IP::splitHostAndPort( $host ); // (ip, port)
111  }
112  $this->client->addServers( $servers );
113  }
114 
120  public function get( $key, &$casToken = null ) {
121  wfProfileIn( __METHOD__ );
122  $this->debugLog( "get($key)" );
123  $result = $this->client->get( $this->encodeKey( $key ), null, $casToken );
124  $result = $this->checkResult( $key, $result );
125  wfProfileOut( __METHOD__ );
126  return $result;
127  }
128 
135  public function set( $key, $value, $exptime = 0 ) {
136  $this->debugLog( "set($key)" );
137  return $this->checkResult( $key, parent::set( $key, $value, $exptime ) );
138  }
139 
147  public function cas( $casToken, $key, $value, $exptime = 0 ) {
148  $this->debugLog( "cas($key)" );
149  return $this->checkResult( $key, parent::cas( $casToken, $key, $value, $exptime ) );
150  }
151 
157  public function delete( $key, $time = 0 ) {
158  $this->debugLog( "delete($key)" );
159  $result = parent::delete( $key, $time );
160  if ( $result === false && $this->client->getResultCode() === Memcached::RES_NOTFOUND ) {
161  // "Not found" is counted as success in our interface
162  return true;
163  } else {
164  return $this->checkResult( $key, $result );
165  }
166  }
167 
174  public function add( $key, $value, $exptime = 0 ) {
175  $this->debugLog( "add($key)" );
176  return $this->checkResult( $key, parent::add( $key, $value, $exptime ) );
177  }
178 
184  public function incr( $key, $value = 1 ) {
185  $this->debugLog( "incr($key)" );
186  $result = $this->client->increment( $key, $value );
187  return $this->checkResult( $key, $result );
188  }
189 
195  public function decr( $key, $value = 1 ) {
196  $this->debugLog( "decr($key)" );
197  $result = $this->client->decrement( $key, $value );
198  return $this->checkResult( $key, $result );
199  }
200 
212  protected function checkResult( $key, $result ) {
213  if ( $result !== false ) {
214  return $result;
215  }
216  switch ( $this->client->getResultCode() ) {
217  case Memcached::RES_SUCCESS:
218  break;
219  case Memcached::RES_DATA_EXISTS:
220  case Memcached::RES_NOTSTORED:
221  case Memcached::RES_NOTFOUND:
222  $this->debugLog( "result: " . $this->client->getResultMessage() );
223  break;
224  default:
225  $msg = $this->client->getResultMessage();
226  if ( $key !== false ) {
227  $server = $this->client->getServerByKey( $key );
228  $serverName = "{$server['host']}:{$server['port']}";
229  $msg = "Memcached error for key \"$key\" on server \"$serverName\": $msg";
230  } else {
231  $msg = "Memcached error: $msg";
232  }
233  wfDebugLog( 'memcached-serious', $msg );
235  }
236  return $result;
237  }
238 
243  public function getMulti( array $keys ) {
244  wfProfileIn( __METHOD__ );
245  $this->debugLog( 'getMulti(' . implode( ', ', $keys ) . ')' );
246  $callback = array( $this, 'encodeKey' );
247  $result = $this->client->getMulti( array_map( $callback, $keys ) );
248  wfProfileOut( __METHOD__ );
249  return $this->checkResult( false, $result );
250  }
251 
252  /* NOTE: there is no cas() method here because it is currently not supported
253  * by the BagOStuff interface and other BagOStuff subclasses, such as
254  * SqlBagOStuff.
255  */
256 }
$result
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'ImportHandleLogItemXMLTag':When parsing a XML tag in a log item. $reader:XMLReader object $logInfo:Array of information Return false to stop further processing of the tag 'ImportHandlePageXMLTag':When parsing a XML tag in a page. $reader:XMLReader object $pageInfo:Array of information Return false to stop further processing of the tag 'ImportHandleRevisionXMLTag':When parsing a XML tag in a page revision. $reader:XMLReader object $pageInfo:Array of page information $revisionInfo:Array of revision information Return false to stop further processing of the tag 'ImportHandleToplevelXMLTag':When parsing a top level XML tag. $reader:XMLReader object Return false to stop further processing of the tag 'ImportHandleUploadXMLTag':When parsing a XML tag in a file upload. $reader:XMLReader object $revisionInfo:Array of information Return false to stop further processing of the tag 'InfoAction':When building information to display on the action=info page. $context:IContextSource object & $pageInfo:Array of information 'InitializeArticleMaybeRedirect':MediaWiki check to see if title is a redirect. $title:Title object for the current page $request:WebRequest $ignoreRedirect:boolean to skip redirect check $target:Title/string of redirect target $article:Article object 'InterwikiLoadPrefix':When resolving if a given prefix is an interwiki or not. Return true without providing an interwiki to continue interwiki search. $prefix:interwiki prefix we are looking for. & $iwData:output array describing the interwiki with keys iw_url, iw_local, iw_trans and optionally iw_api and iw_wikiid. 'InternalParseBeforeSanitize':during Parser 's internalParse method just before the parser removes unwanted/dangerous HTML tags and after nowiki/noinclude/includeonly/onlyinclude and other processings. Ideal for syntax-extensions after template/parser function execution which respect nowiki and HTML-comments. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InternalParseBeforeLinks':during Parser 's internalParse method before links but after nowiki/noinclude/includeonly/onlyinclude and other processings. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InvalidateEmailComplete':Called after a user 's email has been invalidated successfully. $user:user(object) whose email is being invalidated 'IRCLineURL':When constructing the URL to use in an IRC notification. Callee may modify $url and $query, URL will be constructed as $url . $query & $url:URL to index.php & $query:Query string $rc:RecentChange object that triggered url generation 'IsFileCacheable':Override the result of Article::isFileCacheable()(if true) $article:article(object) being checked 'IsTrustedProxy':Override the result of wfIsTrustedProxy() $ip:IP being check $result:Change this value to override the result of wfIsTrustedProxy() 'IsUploadAllowedFromUrl':Override the result of UploadFromUrl::isAllowedUrl() $url:URL used to upload from & $allowed:Boolean indicating if uploading is allowed for given URL 'isValidEmailAddr':Override the result of User::isValidEmailAddr(), for instance to return false if the domain name doesn 't match your organization. $addr:The e-mail address entered by the user & $result:Set this and return false to override the internal checks 'isValidPassword':Override the result of User::isValidPassword() $password:The password entered by the user & $result:Set this and return false to override the internal checks $user:User the password is being validated for 'Language::getMessagesFileName':$code:The language code or the language we 're looking for a messages file for & $file:The messages file path, you can override this to change the location. 'LanguageGetNamespaces':Provide custom ordering for namespaces or remove namespaces. Do not use this hook to add namespaces. Use CanonicalNamespaces for that. & $namespaces:Array of namespaces indexed by their numbers 'LanguageGetMagic':DEPRECATED, use $magicWords in a file listed in $wgExtensionMessagesFiles instead. Use this to define synonyms of magic words depending of the language $magicExtensions:associative array of magic words synonyms $lang:language code(string) 'LanguageGetSpecialPageAliases':DEPRECATED, use $specialPageAliases in a file listed in $wgExtensionMessagesFiles instead. Use to define aliases of special pages names depending of the language $specialPageAliases:associative array of magic words synonyms $lang:language code(string) 'LanguageGetTranslatedLanguageNames':Provide translated language names. & $names:array of language code=> language name $code language of the preferred translations 'LanguageLinks':Manipulate a page 's language links. This is called in various places to allow extensions to define the effective language links for a page. $title:The page 's Title. & $links:Associative array mapping language codes to prefixed links of the form "language:title". & $linkFlags:Associative array mapping prefixed links to arrays of flags. Currently unused, but planned to provide support for marking individual language links in the UI, e.g. for featured articles. 'LinkBegin':Used when generating internal and interwiki links in Linker::link(), before processing starts. Return false to skip default processing and return $ret. See documentation for Linker::link() for details on the expected meanings of parameters. $skin:the Skin object $target:the Title that the link is pointing to & $html:the contents that the< a > tag should have(raw HTML) $result
Definition: hooks.txt:1528
$time
see documentation in includes Linker php for Linker::makeImageLink & $time
Definition: hooks.txt:1358
php
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Definition: skin.txt:62
MemcachedBagOStuff
Base class for memcached clients.
Definition: MemcachedBagOStuff.php:29
MemcachedBagOStuff\applyDefaultParams
applyDefaultParams( $params)
Fill in the defaults for any parameters missing from $params, using the backwards-compatible global v...
Definition: MemcachedBagOStuff.php:36
MemcachedPeclBagOStuff\__construct
__construct( $params)
Constructor.
Definition: MemcachedPeclBagOStuff.php:46
wfDebugLog
wfDebugLog( $logGroup, $text, $dest='all')
Send a line to a supplementary debug log file, if configured, or main debug log if not.
Definition: GlobalFunctions.php:1040
wfProfileIn
wfProfileIn( $functionname)
Begin profiling of a function.
Definition: Profiler.php:33
$params
$params
Definition: styleTest.css.php:40
MemcachedPeclBagOStuff\checkResult
checkResult( $key, $result)
Check the return value from a client method call and take any necessary action.
Definition: MemcachedPeclBagOStuff.php:212
MemcachedBagOStuff\debugLog
debugLog( $text)
Send a debug message to the log.
Definition: MemcachedBagOStuff.php:170
MemcachedPeclBagOStuff\add
add( $key, $value, $exptime=0)
Definition: MemcachedPeclBagOStuff.php:174
MWException
MediaWiki exception.
Definition: MWException.php:26
MemcachedPeclBagOStuff\getMulti
getMulti(array $keys)
Definition: MemcachedPeclBagOStuff.php:243
MemcachedPeclBagOStuff\incr
incr( $key, $value=1)
Definition: MemcachedPeclBagOStuff.php:184
wfProfileOut
wfProfileOut( $functionname='missing')
Stop profiling of a function.
Definition: Profiler.php:46
array
the array() calling protocol came about after MediaWiki 1.4rc1.
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add
An extension or a will often add custom code to the function with or without a global variable For someone wanting email notification when an article is shown may add
Definition: hooks.txt:51
MemcachedBagOStuff\encodeKey
encodeKey( $key)
Encode a key for use on the wire inside the memcached protocol.
Definition: MemcachedBagOStuff.php:128
wfDebug
wfDebug( $text, $dest='all')
Sends a line to the debug log if enabled or, optionally, to a comment in output.
Definition: GlobalFunctions.php:933
$value
$value
Definition: styleTest.css.php:45
IP\splitHostAndPort
static splitHostAndPort( $both)
Given a host/port string, like one might find in the host part of a URL per RFC 2732,...
Definition: IP.php:240
MemcachedPeclBagOStuff\cas
cas( $casToken, $key, $value, $exptime=0)
Definition: MemcachedPeclBagOStuff.php:147
set
it s the revision text itself In either if gzip is set
Definition: hooks.txt:2113
MemcachedPeclBagOStuff
A wrapper class for the PECL memcached client.
Definition: MemcachedPeclBagOStuff.php:29
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Definition: distributors.txt:9
$keys
$keys
Definition: testCompression.php:63
BagOStuff\setLastError
setLastError( $err)
Set the "last error" registry.
Definition: BagOStuff.php:332
BagOStuff\ERR_UNEXPECTED
const ERR_UNEXPECTED
Definition: BagOStuff.php:52
MemcachedPeclBagOStuff\decr
decr( $key, $value=1)
Definition: MemcachedPeclBagOStuff.php:195