/**
* Clear RepoGroup process cache used for finding a file
* @param Title|null $title Title of the file or null to clear all files
*/
public function clearCache(Title $title = null)
{
if ($title == null) {
$this->cache->clear();
} else {
$this->cache->clear($title->getDBkey());
}
}
/**
* Create a new BacklinkCache or reuse any existing one.
* Currently, only one cache instance can exist; callers that
* need multiple backlink cache objects should keep them in scope.
*
* @param Title $title : Title object to get a backlink cache for
* @return BacklinkCache
*/
public static function get(Title $title)
{
if (!self::$cache) {
// init cache
self::$cache = new ProcessCacheLRU(1);
}
$dbKey = $title->getPrefixedDBkey();
if (!self::$cache->has($dbKey, 'obj')) {
self::$cache->set($dbKey, 'obj', new self($title));
}
return self::$cache->get($dbKey, 'obj');
}
protected function doPrimeContainerCache( array $containerInfo ) {
try {
$conn = $this->getConnection(); // Swift proxy connection
foreach ( $containerInfo as $container => $info ) {
$contObj = new CF_Container( $conn->cfs_auth, $conn->cfs_http,
$container, $info['count'], $info['bytes'] );
$this->connContainerCache->set( $container, 'obj', $contObj );
}
} catch ( CloudFilesException $e ) { // some other exception?
$this->handleException( $e, null, __METHOD__, array() );
}
}
/**
* Check if jobs should not be popped of a queue right now.
* This is only used for performance, such as to avoid spamming
* the queue with many sub-jobs before they actually get run.
*
* @param $type string
* @return bool
*/
public function isQueueDeprioritized( $type ) {
if ( $this->cache->has( 'isDeprioritized', $type, 5 ) ) {
return $this->cache->get( 'isDeprioritized', $type );
}
if ( $type === 'refreshLinks2' ) {
// Don't keep converting refreshLinks2 => refreshLinks jobs if the
// later jobs have not been done yet. This helps throttle queue spam.
$deprioritized = !$this->get( 'refreshLinks' )->isEmpty();
$this->cache->set( 'isDeprioritized', $type, $deprioritized );
return $deprioritized;
}
return false;
}
/**
* Translate legacy "title" paths to their "sha1" counterparts
*
* E.g. mwstore://local-backend/local-public/a/ab/<name>.jpg
* => mwstore://local-backend/local-original/x/y/z/<sha1>.jpg
*
* @param array $paths
* @param bool $latest
* @return array Translated paths in same order
*/
public function getBackendPaths(array $paths, $latest = true)
{
$db = $this->getDB($latest ? DB_MASTER : DB_SLAVE);
$origBasePath = $this->backend->getContainerStoragePath("{$this->repoName}-original");
// @TODO: batching
$resolved = array();
foreach ($paths as $i => $path) {
if (!$latest && $this->resolvedPathCache->has($path, 'target', 10)) {
$resolved[$i] = $this->resolvedPathCache->get($path, 'target');
continue;
}
list(, $container, $rel) = FileBackend::splitStoragePath($path);
if ($container === "{$this->repoName}-public") {
$name = basename($path);
if (strpos($path, '!') !== false) {
$sha1 = $db->selectField('oldimage', 'oi_sha1', array('oi_archive_name' => $name), __METHOD__);
} else {
$sha1 = $db->selectField('image', 'img_sha1', array('img_name' => $name), __METHOD__);
}
if (!strlen($sha1)) {
$resolved[$i] = $path;
// give up
continue;
}
$resolved[$i] = $this->getPathForSHA1($sha1);
$this->resolvedPathCache->set($path, 'target', $resolved[$i]);
} elseif ($container === "{$this->repoName}-deleted") {
$name = basename($path);
// <hash>.<ext>
$sha1 = substr($name, 0, strpos($name, '.'));
// ignore extension
$resolved[$i] = $this->getPathForSHA1($sha1);
$this->resolvedPathCache->set($path, 'target', $resolved[$i]);
} else {
$resolved[$i] = $path;
}
}
$res = array();
foreach ($paths as $i => $path) {
$res[$i] = $resolved[$i];
}
return $res;
}
/**
* Pop a job off one of the job queues
*
* This pops a job off a queue as specified by $wgJobTypeConf and
* updates the aggregate job queue information cache as needed.
*
* @param int|string $qtype JobQueueGroup::TYPE_* constant or job type string
* @param int $flags Bitfield of JobQueueGroup::USE_* constants
* @param array $blacklist List of job types to ignore
* @return Job|bool Returns false on failure
*/
public function pop($qtype = self::TYPE_DEFAULT, $flags = 0, array $blacklist = array())
{
$job = false;
if (is_string($qtype)) {
// specific job type
if (!in_array($qtype, $blacklist)) {
$job = $this->get($qtype)->pop();
if (!$job) {
JobQueueAggregator::singleton()->notifyQueueEmpty($this->wiki, $qtype);
}
}
} else {
// any job in the "default" jobs types
if ($flags & self::USE_CACHE) {
if (!$this->cache->has('queues-ready', 'list', self::PROC_CACHE_TTL)) {
$this->cache->set('queues-ready', 'list', $this->getQueuesWithJobs());
}
$types = $this->cache->get('queues-ready', 'list');
} else {
$types = $this->getQueuesWithJobs();
}
if ($qtype == self::TYPE_DEFAULT) {
$types = array_intersect($types, $this->getDefaultQueueTypes());
}
$types = array_diff($types, $blacklist);
// avoid selected types
shuffle($types);
// avoid starvation
foreach ($types as $type) {
// for each queue...
$job = $this->get($type)->pop();
if ($job) {
// found
break;
} else {
// not found
JobQueueAggregator::singleton()->notifyQueueEmpty($this->wiki, $type);
$this->cache->clear('queues-ready');
}
}
}
return $job;
}
/**
* Do a batch lookup from cache for file stats for all paths
* used in a list of storage paths or FileOp objects.
* This loads the persistent cache values into the process cache.
*
* @param array $items List of storage paths or FileOps
* @return void
*/
protected final function primeFileCache(array $items)
{
wfProfileIn(__METHOD__);
wfProfileIn(__METHOD__ . '-' . $this->name);
$paths = array();
// list of storage paths
$pathNames = array();
// (cache key => storage path)
// Get all the paths/containers from the items...
foreach ($items as $item) {
if ($item instanceof FileOp) {
$paths = array_merge($paths, $item->storagePathsRead());
$paths = array_merge($paths, $item->storagePathsChanged());
} elseif (self::isStoragePath($item)) {
$paths[] = FileBackend::normalizeStoragePath($item);
}
}
// Get rid of any paths that failed normalization...
$paths = array_filter($paths, 'strlen');
// remove nulls
// Get all the corresponding cache keys for paths...
foreach ($paths as $path) {
list(, $rel, ) = $this->resolveStoragePath($path);
if ($rel !== null) {
// valid path for this backend
$pathNames[$this->fileCacheKey($path)] = $path;
}
}
// Get all cache entries for these container cache keys...
$values = $this->memCache->getMulti(array_keys($pathNames));
foreach ($values as $cacheKey => $val) {
if (is_array($val)) {
$path = $pathNames[$cacheKey];
$this->cheapCache->set($path, 'stat', $val);
if (isset($val['sha1'])) {
// some backends store SHA-1 as metadata
$this->cheapCache->set($path, 'sha1', array('hash' => $val['sha1'], 'latest' => $val['latest']));
}
}
}
wfProfileOut(__METHOD__ . '-' . $this->name);
wfProfileOut(__METHOD__);
}
/**
* Clear the cache for slag lag delay times
*/
public function clearLagTimeCache()
{
$this->mProcCache->clear('slave_lag');
}
