class BlockManager

Same name and namespace in other branches
  1. 8.9.x core/lib/Drupal/Core/Block/BlockManager.php \Drupal\Core\Block\BlockManager
  2. 10 core/lib/Drupal/Core/Block/BlockManager.php \Drupal\Core\Block\BlockManager
  3. 11.x core/lib/Drupal/Core/Block/BlockManager.php \Drupal\Core\Block\BlockManager

Manages discovery and instantiation of block plugins.

@todo Add documentation to this class.


Expanded class hierarchy of BlockManager

See also


1 file declares its use of BlockManager
BlockManagerTest.php in core/tests/Drupal/Tests/Core/Block/BlockManagerTest.php
1 string reference to 'BlockManager' in core/
1 service uses BlockManager
plugin.manager.block in core/


core/lib/Drupal/Core/Block/BlockManager.php, line 20


View source
class BlockManager extends DefaultPluginManager implements BlockManagerInterface, FallbackPluginManagerInterface {
    use CategorizingPluginManagerTrait {
        getSortedDefinitions as traitGetSortedDefinitions;
    use FilteredPluginManagerTrait;
     * The logger.
     * @var \Psr\Log\LoggerInterface
    protected $logger;
     * Constructs a new \Drupal\Core\Block\BlockManager object.
     * @param \Traversable $namespaces
     *   An object that implements \Traversable which contains the root paths
     *   keyed by the corresponding namespace to look for plugin implementations.
     * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
     *   Cache backend instance to use.
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
     *   The module handler to invoke the alter hook with.
     * @param \Psr\Log\LoggerInterface $logger
     *   The logger.
    public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler, LoggerInterface $logger) {
        parent::__construct('Plugin/Block', $namespaces, $module_handler, 'Drupal\\Core\\Block\\BlockPluginInterface', 'Drupal\\Core\\Block\\Annotation\\Block');
        $this->setCacheBackend($cache_backend, 'block_plugins');
        $this->logger = $logger;
     * {@inheritdoc}
    protected function getType() {
        return 'block';
     * {@inheritdoc}
    public function processDefinition(&$definition, $plugin_id) {
        parent::processDefinition($definition, $plugin_id);
     * {@inheritdoc}
    public function getSortedDefinitions(array $definitions = NULL) {
        // Sort the plugins first by category, then by admin label.
        $definitions = $this->traitGetSortedDefinitions($definitions, 'admin_label');
        // Do not display the 'broken' plugin in the UI.
        return $definitions;
     * {@inheritdoc}
    public function getFallbackPluginId($plugin_id, array $configuration = []) {
        return 'broken';
     * {@inheritdoc}
    protected function handlePluginNotFound($plugin_id, array $configuration) {
            ->warning('The "%plugin_id" was not found', [
            '%plugin_id' => $plugin_id,
        return parent::handlePluginNotFound($plugin_id, $configuration);



Title Sort descending Modifiers Object type Summary Member alias Overriden Title Overrides
BlockManager::$logger protected property The logger.
BlockManager::getFallbackPluginId public function Gets a fallback id for a missing plugin. Overrides FallbackPluginManagerInterface::getFallbackPluginId
BlockManager::getSortedDefinitions public function
BlockManager::getType protected function A string identifying the plugin type. Overrides FilteredPluginManagerTrait::getType
BlockManager::handlePluginNotFound protected function Allows plugin managers to specify custom behavior if a plugin is not found. Overrides PluginManagerBase::handlePluginNotFound
BlockManager::processDefinition public function Performs extra processing on plugin definitions. Overrides DefaultPluginManager::processDefinition
BlockManager::__construct public function Constructs a new \Drupal\Core\Block\BlockManager object. Overrides DefaultPluginManager::__construct
CategorizingPluginManagerTrait::getCategories public function
CategorizingPluginManagerTrait::getGroupedDefinitions public function
CategorizingPluginManagerTrait::getModuleHandler public function Returns the module handler used.
CategorizingPluginManagerTrait::getProviderName protected function Gets the name of a provider.
CategorizingPluginManagerTrait::getSortedDefinitions public function Aliased as: traitGetSortedDefinitions
CategorizingPluginManagerTrait::processDefinitionCategory protected function Processes a plugin definition to ensure there is a category.
ContextAwarePluginManagerTrait::contextHandler protected function Wraps the context handler. 1
ContextAwarePluginManagerTrait::getDefinitions abstract public function See \Drupal\Component\Plugin\Discovery\DiscoveryInterface::getDefinitions(). 1
ContextAwarePluginManagerTrait::getDefinitionsForContexts public function See \Drupal\Core\Plugin\Context\ContextAwarePluginManagerInterface::getDefinitionsForContexts().
DefaultPluginManager::$additionalAnnotationNamespaces protected property Additional annotation namespaces.
DefaultPluginManager::$alterHook protected property Name of the alter hook if one should be invoked.
DefaultPluginManager::$cacheKey protected property The cache key.
DefaultPluginManager::$cacheTags protected property An array of cache tags to use for the cached definitions.
DefaultPluginManager::$defaults protected property A set of defaults to be referenced by $this->processDefinition(). 9
DefaultPluginManager::$moduleHandler protected property The module handler to invoke the alter hook. 1
DefaultPluginManager::$namespaces protected property An object of root paths that are traversable.
DefaultPluginManager::$pluginDefinitionAnnotationName protected property The name of the annotation that contains the plugin definition.
DefaultPluginManager::$pluginInterface protected property The interface each plugin should implement. 1
DefaultPluginManager::$subdir protected property The subdirectory within a namespace to look for plugins.
DefaultPluginManager::alterDefinitions protected function Invokes the hook to alter the definitions if the alter hook is set. 1
DefaultPluginManager::alterInfo protected function Sets the alter hook name.
DefaultPluginManager::clearCachedDefinitions public function Clears static and persistent plugin definition caches. Overrides CachedDiscoveryInterface::clearCachedDefinitions 6
DefaultPluginManager::extractProviderFromDefinition protected function Extracts the provider from a plugin definition.
DefaultPluginManager::findDefinitions protected function Finds plugin definitions. 7
DefaultPluginManager::getCacheContexts public function The cache contexts associated with this object. Overrides CacheableDependencyInterface::getCacheContexts
DefaultPluginManager::getCachedDefinitions protected function Returns the cached plugin definitions of the decorated discovery class.
DefaultPluginManager::getCacheMaxAge public function The maximum age for which this object may be cached. Overrides CacheableDependencyInterface::getCacheMaxAge
DefaultPluginManager::getCacheTags public function The cache tags associated with this object. Overrides CacheableDependencyInterface::getCacheTags
DefaultPluginManager::getDiscovery protected function Gets the plugin discovery. Overrides PluginManagerBase::getDiscovery 13
DefaultPluginManager::getFactory protected function Gets the plugin factory. Overrides PluginManagerBase::getFactory
DefaultPluginManager::providerExists protected function Determines if the provider of a definition exists. 3
DefaultPluginManager::setCacheBackend public function Initialize the cache backend.
DefaultPluginManager::setCachedDefinitions protected function Sets a cache of plugin definitions for the decorated discovery class.
DefaultPluginManager::useCaches public function Disable the use of caches. Overrides CachedDiscoveryInterface::useCaches 1
DiscoveryCachedTrait::$definitions protected property Cached definitions array. 1
DiscoveryCachedTrait::getDefinition public function Overrides DiscoveryTrait::getDefinition 3
DiscoveryTrait::doGetDefinition protected function Gets a specific plugin definition.
DiscoveryTrait::hasDefinition public function
FilteredPluginManagerTrait::getFilteredDefinitions public function Implements \Drupal\Core\Plugin\FilteredPluginManagerInterface::getFilteredDefinitions().
FilteredPluginManagerTrait::moduleHandler protected function Wraps the module handler. 1
FilteredPluginManagerTrait::themeManager protected function Wraps the theme manager. 1
PluginManagerBase::$discovery protected property The object that discovers plugins managed by this manager.
PluginManagerBase::$factory protected property The object that instantiates plugins managed by this manager.
PluginManagerBase::$mapper protected property The object that returns the preconfigured plugin instance appropriate for a particular runtime condition.
PluginManagerBase::createInstance public function 12
PluginManagerBase::getInstance public function 6
StringTranslationTrait::$stringTranslation protected property The string translation service. 3
StringTranslationTrait::formatPlural protected function Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals protected function Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation protected function Gets the string translation service.
StringTranslationTrait::setStringTranslation public function Sets the string translation service to use. 2
StringTranslationTrait::t protected function Translates a string to the current language or to a given language.
UseCacheBackendTrait::$cacheBackend protected property Cache backend instance.
UseCacheBackendTrait::$useCaches protected property Flag whether caches should be used or skipped.
UseCacheBackendTrait::cacheGet protected function Fetches from the cache backend, respecting the use caches flag.
UseCacheBackendTrait::cacheSet protected function Stores data in the persistent cache, respecting the use caches flag.

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