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class PageCacheCheck in Purge 8.3

Tests if the page_cache module is installed.

Plugin annotation


@PurgeDiagnosticCheck(
  id = "page_cache",
  title = @Translation("Page cache"),
  description = @Translation("Tests if the page_cache module is installed."),
  dependent_queue_plugins = {},
  dependent_purger_plugins = {}
)

Hierarchy

Expanded class hierarchy of PageCacheCheck

File

src/Plugin/Purge/DiagnosticCheck/PageCacheCheck.php, line 19

Namespace

Drupal\purge\Plugin\Purge\DiagnosticCheck
View source 
class PageCacheCheck extends DiagnosticCheckBase implements DiagnosticCheckInterface {

  /**
   * The module handler.
   *
   * @var \Drupal\Core\Extension\ModuleHandlerInterface
   */
  protected $moduleHandler;

  /**
   * Construct a PageCacheCheck object.
   *
   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
   *   The module handler.
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   */
  public final function __construct(ModuleHandlerInterface $module_handler, array $configuration, $plugin_id, $plugin_definition) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->moduleHandler = $module_handler;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($container
      ->get('module_handler'), $configuration, $plugin_id, $plugin_definition);
  }

  /**
   * {@inheritdoc}
   */
  public function run() {
    $this->value = $this
      ->t('installed');

    // Test for the page_cache module, which is required for cache invalidation.
    if (!$this->moduleHandler
      ->moduleExists('page_cache')) {
      $this->value = '';
      $this->recommendation = $this
        ->t("Please install the page_cache module. The page cache acts as a 'second layer of defence' by keeping copies of all generated pages, which protects you from widespread performance degradation in case of emergencies.");
      return self::SEVERITY_WARNING;
    }
    return self::SEVERITY_OK;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
DependencySerializationTrait::$_entityStorages protected property An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds protected property An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep public function 1
DependencySerializationTrait::__wakeup public function 2
DiagnosticCheckBase::$description private property The description of the check as described in the plugin's metadata.
DiagnosticCheckBase::$recommendation protected property A recommendation matching the severity level, may contain NULL.
DiagnosticCheckBase::$severity private property The severity of the outcome of this check.
DiagnosticCheckBase::$title private property The title of the check as described in the plugin's metadata.
DiagnosticCheckBase::$value protected property Optional check outcome / value (e.g. version numbers), may contain NULL.
DiagnosticCheckBase::getDescription public function Gets the description of the check. Overrides DiagnosticCheckInterface::getDescription
DiagnosticCheckBase::getRecommendation public function Get a recommendation matching the severity level, may return NULL. Overrides DiagnosticCheckInterface::getRecommendation
DiagnosticCheckBase::getRequirementsArray public function Generates a individual Drupal-like requirements array. Overrides DiagnosticCheckInterface::getRequirementsArray
DiagnosticCheckBase::getRequirementsSeverity public function Get the severity level, expressed as a status_report severity. Overrides DiagnosticCheckInterface::getRequirementsSeverity
DiagnosticCheckBase::getSeverity public function Get the severity level. Overrides DiagnosticCheckInterface::getSeverity
DiagnosticCheckBase::getSeverityString public function Get the severity level as unprefixed string. Overrides DiagnosticCheckInterface::getSeverityString
DiagnosticCheckBase::getTitle public function Gets the title of the check. Overrides DiagnosticCheckInterface::getTitle
DiagnosticCheckBase::getValue public function Get an optional value for the check output, may return NULL. Overrides DiagnosticCheckInterface::getValue
DiagnosticCheckBase::runCheck protected function Late runtime helper to assure that ::run() got called (and only once).
DiagnosticCheckInterface::SEVERITY_ERROR constant BLOCKING severity -- Error condition; purge.purgers service cannot operate.
DiagnosticCheckInterface::SEVERITY_INFO constant Non-blocking severity -- Informational message only.
DiagnosticCheckInterface::SEVERITY_OK constant Non-blocking severity -- check successfully passed.
DiagnosticCheckInterface::SEVERITY_WARNING constant Non-blocking severity -- Warning condition; proceed but flag warning.
MessengerTrait::$messenger protected property The messenger. 29
MessengerTrait::messenger public function Gets the messenger. 29
MessengerTrait::setMessenger public function Sets the messenger.
PageCacheCheck::$moduleHandler protected property The module handler.
PageCacheCheck::create public static function Creates an instance of the plugin. Overrides DiagnosticCheckBase::create
PageCacheCheck::run public function Perform the check and determine the severity level. Overrides DiagnosticCheckInterface::run
PageCacheCheck::__construct final public function Construct a PageCacheCheck object. Overrides PluginBase::__construct
PluginBase::$configuration protected property Configuration information passed into the plugin. 1
PluginBase::$pluginDefinition protected property The plugin implementation definition. 1
PluginBase::$pluginId protected property The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR constant A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId public function Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId public function Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition public function Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition 3
PluginBase::getPluginId public function Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable public function Determines if the plugin is configurable.
StringTranslationTrait::$stringTranslation protected property The string translation service. 1
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.