Issue #1764474 by Berdir, chx, alexpott, pounard, msonnabaum: Make Cache...

Issue #1764474 by Berdir, chx, alexpott, pounard, msonnabaum: Make Cache interface and backends use the DIC.

core/includes/cache.inc

@@ -5,7 +5,7 @@
  * Functions and interfaces for cache handling.
  */
 
-use Drupal\Core\Cache\CacheFactory;
+use Drupal\Core\Cache\Cache;
 
 /**
  * Instantiates and statically caches the correct class for a cache bin.
@@ -26,40 +26,7 @@
  * @see Drupal\Core\Cache\CacheBackendInterface
  */
 function cache($bin = 'cache') {
-  // Use the advanced drupal_static() pattern, since this is called very often.
-  static $drupal_static_fast;
-  if (!isset($drupal_static_fast)) {
-    $drupal_static_fast['cache'] = &drupal_static(__FUNCTION__, array());
-  }
-  $cache_objects = &$drupal_static_fast['cache'];
-
-  // Temporary backwards compatibiltiy layer, allow old style prefixed cache
-  // bin names to be passed as arguments.
-  $bin = str_replace('cache_', '', $bin);
-
-  if (!isset($cache_objects[$bin])) {
-    $cache_objects[$bin] = CacheFactory::get($bin);
-  }
-  return $cache_objects[$bin];
-}
-
-/**
- * Deletes items from all bins with any of the specified tags.
- *
- * Many sites have more than one active cache backend, and each backend may use
- * a different strategy for storing tags against cache items, and deleting cache
- * items associated with a given tag.
- *
- * When deleting a given list of tags, we iterate over each cache backend, and
- * and call deleteTags() on each.
- *
- * @param array $tags
- *   The list of tags to delete cache items for.
- */
-function cache_delete_tags(array $tags) {
-  foreach (CacheFactory::getBackends() as $bin => $class) {
-    cache($bin)->deleteTags($tags);
-  }
+  return Drupal::cache($bin);
 }
 
 /**
@@ -74,9 +41,10 @@ function cache_delete_tags(array $tags) {
  *
  * @param array $tags
  *   The list of tags to invalidate cache items for.
+ *
+ * @deprecated 8.x
+ *   Use \Drupal\Core\Cache\Cache::invalidateTags().
  */
 function cache_invalidate_tags(array $tags) {
-  foreach (CacheFactory::getBackends() as $bin => $class) {
-    cache($bin)->invalidateTags($tags);
-  }
+  Cache::invalidateTags($tags);
 }

core/includes/common.inc

 <?php
 
+use Drupal\Core\Cache\Cache;
 use Symfony\Component\DependencyInjection\Container;
 use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
@@ -6311,8 +6312,7 @@ function drupal_implode_tags($tags) {
  *
  * At times, it is necessary to re-initialize the entire system to account for
  * changed or new code. This function:
- * - Clears all persistent caches (invoking hook_cache_flush()), which always
- *   includes:
+ * - Clears all persistent caches:
  *   - The bootstrap cache bin containing base system, module system, and theme
  *     system information.
  *   - The common 'cache' cache bin containing arbitrary caches.
@@ -6342,6 +6342,7 @@ function drupal_implode_tags($tags) {
  * longer exist. All following hook_rebuild() operations must be based on fresh
  * and current system data. All modules must be able to rely on this contract.
  *
+ * @see \Drupal\Core\Cache\CacheHelper::getBins()
  * @see hook_cache_flush()
  * @see hook_rebuild()
  *
@@ -6364,8 +6365,12 @@ function drupal_flush_all_caches() {
   // Flush all persistent caches.
   // This is executed based on old/previously known information, which is
   // sufficient, since new extensions cannot have any primed caches yet.
-  foreach (module_invoke_all('cache_flush') as $bin) {
-    cache($bin)->deleteAll();
+  module_invoke_all('cache_flush');
+  foreach (Cache::getBins() as $service_id => $cache_backend) {
+    // @todo remove form after http://drupal.org/node/512026 is in.
+    if ($service_id != 'cache.form' && $service_id != 'cache.menu') {
+      $cache_backend->deleteAll();
+    }
   }
 
   // Flush asset file caches.

core/includes/install.core.inc

@@ -350,6 +350,11 @@ function install_begin_request(&$install_state) {
 
     // Register the 'language_manager' service.
     $container->register('language_manager', 'Drupal\Core\Language\LanguageManager');
+    foreach (array('bootstrap', 'config', 'cache', 'form', 'menu', 'page', 'path') as $bin) {
+      $container
+        ->register("cache.$bin", 'Drupal\Core\Cache\MemoryBackend')
+        ->addArgument($bin);
+    }
 
     // The install process cannot use the database lock backend since the database
     // is not fully up, so we use a null backend implementation during the
@@ -390,7 +395,6 @@ function install_begin_request(&$install_state) {
   $module_handler->load('system');
 
   require_once DRUPAL_ROOT . '/core/includes/cache.inc';
-  $conf['cache_classes'] = array('cache' => 'Drupal\Core\Cache\MemoryBackend');
 
   // Prepare for themed output. We need to run this at the beginning of the
   // page request to avoid a different theme accidentally getting set. (We also
@@ -1622,13 +1626,7 @@ function install_load_profile(&$install_state) {
  * @param $install_state
  *   An array of information about the current installation state.
  */
-function install_bootstrap_full(&$install_state) {
-  // The early stages of the installer override the cache backend since Drupal
-  // isn't fully set up yet. Here the override is removed so that the standard
-  // cache backend will be used again.
-  unset($GLOBALS['conf']['cache_classes']['cache']);
-  drupal_static_reset('cache');
-
+function install_bootstrap_full() {
   drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
 }
 

core/includes/update.inc

@@ -9,6 +9,7 @@
  */
 
 use Drupal\Component\Graph\Graph;
+use Drupal\Component\Utility\Settings;
 use Drupal\Core\Config\FileStorage;
 use Drupal\Core\Config\ConfigException;
 use Drupal\Core\DrupalKernel;
@@ -97,7 +98,9 @@ function update_prepare_d8_bootstrap() {
   // During the bootstrap to DRUPAL_BOOTSTRAP_PAGE_CACHE, code will try to read
   // the cache but the cache tables are not compatible yet. Use the Null backend
   // by default to avoid exceptions.
-  $GLOBALS['conf']['cache_classes'] = array('cache' => 'Drupal\Core\Cache\NullBackend');
+  $settings = settings()->getAll();
+  $settings['cache']['default'] = 'cache.backend.memory';
+  new Settings($settings);
 
   // Enable UpdateBundle service overrides.
   $GLOBALS['conf']['container_bundles'][] = 'Drupal\Core\DependencyInjection\UpdateBundle';
@@ -420,8 +423,11 @@ function update_prepare_d8_bootstrap() {
     }
   }
   // Now remove the cache override.
-  unset($GLOBALS['conf']['cache_classes']['cache']);
-  drupal_static_reset('cache');
+  $settings = settings()->getAll();
+  unset($settings['cache']['default']);
+  new Settings($settings);
+  $kernel = new DrupalKernel('update', FALSE, drupal_classloader(), FALSE);
+  $kernel->boot();
 }
 
 /**

core/lib/Drupal.php

@@ -131,6 +131,20 @@ public static function database() {
     return static::$container->get('database');
   }
 
+  /**
+   * Returns the requested cache bin.
+   *
+   * @param string $bin
+   *   (optional) The cache bin for which the cache object should be returned,
+   *   defaults to 'cache'.
+   *
+   * @return Drupal\Core\Cache\CacheBackendInterface
+   *   The cache object associated with the specified bin.
+   */
+  public static function cache($bin = 'cache') {
+    return static::$container->get('cache.' . $bin);
+  }
+
   /**
    * Returns an expirable key value store collection.
    *

core/lib/Drupal/Core/Cache/Cache.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Cache\Cache.
+ */
+
+namespace Drupal\Core\Cache;
+
+/**
+ * Helper methods for cache.
+ */
+class Cache {
+
+  /**
+   * Deletes items from all bins with any of the specified tags.
+   *
+   * Many sites have more than one active cache backend, and each backend may
+   * use a different strategy for storing tags against cache items, and
+   * deleting cache items associated with a given tag.
+   *
+   * When deleting a given list of tags, we iterate over each cache backend, and
+   * and call deleteTags() on each.
+   *
+   * @param array $tags
+   *   The list of tags to delete cache items for.
+   */
+  public static function deleteTags(array $tags) {
+    foreach (static::getBins() as $cache_backend) {
+      $cache_backend->deleteTags($tags);
+    }
+  }
+
+  /**
+   * Marks cache items from all bins with any of the specified tags as invalid.
+   *
+   * Many sites have more than one active cache backend, and each backend my use
+   * a different strategy for storing tags against cache items, and invalidating
+   * cache items associated with a given tag.
+   *
+   * When invalidating a given list of tags, we iterate over each cache backend,
+   * and call invalidateTags() on each.
+   *
+   * @param array $tags
+   *   The list of tags to invalidate cache items for.
+   */
+  public static function invalidateTags(array $tags) {
+    foreach (static::getBins() as $cache_backend) {
+      $cache_backend->invalidateTags($tags);
+    }
+  }
+
+  /**
+   * Gets all cache bin services.
+   *
+   * @return array
+   *  An array of cache backend objects keyed by cache bins.
+   */
+  public static function getBins() {
+    $bins = array();
+    $container = \Drupal::getContainer();
+    foreach ($container->getParameter('cache_bins') as $service_id => $bin) {
+      $bins[$bin] = $container->get($service_id);
+    }
+    return $bins;
+  }
+
+}

core/lib/Drupal/Core/Cache/CacheFactory.php

@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\Core\Cache\CacheFactory.
+ * Contains \Drupal\Core\Cache\CacheFactory.
  */
 
 namespace Drupal\Core\Cache;
@@ -10,7 +10,28 @@
 /**
  * Defines the cache backend factory.
  */
-class CacheFactory {
+use Drupal\Component\Utility\Settings;
+use Symfony\Component\DependencyInjection\ContainerAware;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+class CacheFactory extends ContainerAware {
+
+  /**
+   * The settings array.
+   *
+   * @var \Drupal\Component\Utility\Settings
+   */
+  protected $settings;
+
+  /**
+   * Constructs CacheFactory object.
+   *
+   * @param \Drupal\Component\Utility\Settings $settings
+   *   The settings array.
+   */
+  function __construct(Settings $settings) {
+    $this->settings = $settings;
+  }
 
   /**
    * Instantiates a cache backend class for a given cache bin.
@@ -24,33 +45,37 @@ class CacheFactory {
    * @param string $bin
    *   The cache bin for which a cache backend object should be returned.
    *
-   * @return Drupal\Core\Cache\CacheBackendInterface
+   * @return \Drupal\Core\Cache\CacheBackendInterface
    *   The cache backend object associated with the specified bin.
    */
-  public static function get($bin) {
-    // Check whether there is a custom class defined for the requested bin or
-    // use the default 'cache' definition otherwise.
-    $cache_backends = self::getBackends();
-    $class = isset($cache_backends[$bin]) ? $cache_backends[$bin] : $cache_backends['cache'];
-    return new $class($bin);
+  public function get($bin) {
+    $cache_settings = $this->settings->get('cache');
+    if (isset($cache_settings[$bin])) {
+      $service_name = $cache_settings[$bin];
+    }
+    elseif (isset($cache_settings['default'])) {
+      $service_name = $cache_settings['default'];
+    }
+    else {
+      $service_name = 'cache.backend.database';
+    }
+    return $this->container->get($service_name)->get($bin);
   }
 
   /**
-   * Returns a list of cache backends for this site.
+   * Helper to register a cache bin to the container.
    *
-   * @return array
-   *   An associative array with cache bins as keys, and backend class names as
-   *   value.
+   * @param \Symfony\Component\DependencyInjection\ContainerBuilder $container
+   *   The container to register the cache bin on.
+   * @param $bin
+   *   The cache bin to add. Do not add the cache_ prefix.
    */
-  public static function getBackends() {
-    // @todo Improve how cache backend classes are defined. Cannot be
-    //   configuration, since e.g. the CachedStorage config storage controller
-    //   requires the definition in its constructor already.
-    global $conf;
-    $cache_backends = isset($conf['cache_classes']) ? $conf['cache_classes'] : array();
-    // Ensure there is a default 'cache' bin definition.
-    $cache_backends += array('cache' => 'Drupal\Core\Cache\DatabaseBackend');
-    return $cache_backends;
+  public static function registerBin(ContainerBuilder $container, $bin) {
+    $container
+      ->register("cache.$bin", 'Drupal\Core\Cache\CacheBackendInterface')
+      ->setFactoryService('cache_factory')
+      ->setFactoryMethod('get')
+      ->addArgument($bin)
+      ->addTag('cache.bin');
   }
-
 }

core/lib/Drupal/Core/Cache/DatabaseBackend.php

@@ -7,8 +7,8 @@
 
 namespace Drupal\Core\Cache;
 
+use Drupal\Core\Database\Connection;
 use Drupal\Core\Database\Database;
-use Drupal\Core\Database\DatabaseException;
 
 /**
  * Defines a default cache implementation.
@@ -23,19 +23,30 @@ class DatabaseBackend implements CacheBackendInterface {
    */
   protected $bin;
 
+
+  /**
+   * The database connection.
+   *
+   * @var \Drupal\Core\Database\Connection
+   */
+  protected $connection;
+
   /**
    * Constructs a DatabaseBackend object.
    *
+   * @param \Drupal\Core\Database\Connection $connection
+   *   The database connection.
    * @param string $bin
    *   The cache bin for which the object is created.
    */
-  public function __construct($bin) {
+  public function __construct(Connection $connection, $bin) {
     // All cache tables should be prefixed with 'cache_', except for the
     // default 'cache' bin.
     if ($bin != 'cache') {
       $bin = 'cache_' . $bin;
     }
     $this->bin = $bin;
+    $this->connection = $connection;
   }
 
   /**
@@ -58,7 +69,7 @@ public function getMultiple(&$cids, $allow_invalid = FALSE) {
     // is used here only due to the performance overhead we would incur
     // otherwise. When serving an uncached page, the overhead of using
     // ::select() is a much smaller proportion of the request.
-    $result = Database::getConnection()->query('SELECT cid, data, created, expire, serialized, tags, checksum_invalidations, checksum_deletions FROM {' . Database::getConnection()->escapeTable($this->bin) . '} WHERE cid IN (:cids)', array(':cids' => $cids));
+    $result = $this->connection->query('SELECT cid, data, created, expire, serialized, tags, checksum_invalidations, checksum_deletions FROM {' . $this->connection->escapeTable($this->bin) . '} WHERE cid IN (:cids)', array(':cids' => $cids));
     $cache = array();
     foreach ($result as $item) {
       $item = $this->prepareItem($item, $allow_invalid);
@@ -142,7 +153,7 @@ public function set($cid, $data, $expire = CacheBackendInterface::CACHE_PERMANEN
       $fields['serialized'] = 0;
     }
 
-    Database::getConnection()->merge($this->bin)
+    $this->connection->merge($this->bin)
       ->key(array('cid' => $cid))
       ->fields($fields)
       ->execute();
@@ -152,7 +163,7 @@ public function set($cid, $data, $expire = CacheBackendInterface::CACHE_PERMANEN
    * Implements Drupal\Core\Cache\CacheBackendInterface::delete().
    */
   public function delete($cid) {
-    Database::getConnection()->delete($this->bin)
+    $this->connection->delete($this->bin)
       ->condition('cid', $cid)
       ->execute();
   }
@@ -163,7 +174,7 @@ public function delete($cid) {
   public function deleteMultiple(array $cids) {
     // Delete in chunks when a large array is passed.
     do {
-      Database::getConnection()->delete($this->bin)
+      $this->connection->delete($this->bin)
         ->condition('cid', array_splice($cids, 0, 1000), 'IN')
         ->execute();
     }
@@ -177,7 +188,7 @@ public function deleteTags(array $tags) {
     $tag_cache = &drupal_static('Drupal\Core\Cache\CacheBackendInterface::tagCache');
     foreach ($this->flattenTags($tags) as $tag) {
       unset($tag_cache[$tag]);
-      Database::getConnection()->merge('cache_tags')
+      $this->connection->merge('cache_tags')
         ->insertFields(array('deletions' => 1))
         ->expression('deletions', 'deletions + 1')
         ->key(array('tag' => $tag))
@@ -189,7 +200,7 @@ public function deleteTags(array $tags) {
    * Implements Drupal\Core\Cache\CacheBackendInterface::deleteAll().
    */
   public function deleteAll() {
-    Database::getConnection()->truncate($this->bin)->execute();
+    $this->connection->truncate($this->bin)->execute();
   }
 
   /**
@@ -205,7 +216,7 @@ public function invalidate($cid) {
   public function invalidateMultiple(array $cids) {
     // Update in chunks when a large array is passed.
     do {
-      Database::getConnection()->update($this->bin)
+      $this->connection->update($this->bin)
         ->fields(array('expire' => REQUEST_TIME - 1))
         ->condition('cid', array_splice($cids, 0, 1000), 'IN')
         ->execute();
@@ -220,7 +231,7 @@ public function invalidateTags(array $tags) {
     $tag_cache = &drupal_static('Drupal\Core\Cache\CacheBackendInterface::tagCache');
     foreach ($this->flattenTags($tags) as $tag) {
       unset($tag_cache[$tag]);
-      Database::getConnection()->merge('cache_tags')
+      $this->connection->merge('cache_tags')
         ->insertFields(array('invalidations' => 1))
         ->expression('invalidations', 'invalidations + 1')
         ->key(array('tag' => $tag))
@@ -232,7 +243,7 @@ public function invalidateTags(array $tags) {
    * Implements Drupal\Core\Cache\CacheBackendInterface::invalidateAll().
    */
   public function invalidateAll() {
-    Database::getConnection()->update($this->bin)
+    $this->connection->update($this->bin)
       ->fields(array('expire' => REQUEST_TIME - 1))
       ->execute();
   }
@@ -296,7 +307,7 @@ protected function checksumTags($flat_tags) {
 
     $query_tags = array_diff($flat_tags, array_keys($tag_cache));
     if ($query_tags) {
-      $db_tags = Database::getConnection()->query('SELECT tag, invalidations, deletions FROM {cache_tags} WHERE tag IN (:tags)', array(':tags' => $query_tags))->fetchAllAssoc('tag', \PDO::FETCH_ASSOC);
+      $db_tags = $this->connection->query('SELECT tag, invalidations, deletions FROM {cache_tags} WHERE tag IN (:tags)', array(':tags' => $query_tags))->fetchAllAssoc('tag', \PDO::FETCH_ASSOC);
       $tag_cache += $db_tags;
 
       // Fill static cache with empty objects for tags not found in the database.
@@ -316,7 +327,7 @@ protected function checksumTags($flat_tags) {
    */
   public function isEmpty() {
     $this->garbageCollection();
-    $query = Database::getConnection()->select($this->bin);
+    $query = $this->connection->select($this->bin);
     $query->addExpression('1');
     $result = $query->range(0, 1)
       ->execute()

core/lib/Drupal/Core/Cache/DatabaseBackendFactory.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Cache\DatabaseBackendFactory.
+ */
+
+namespace Drupal\Core\Cache;
+
+use Drupal\Core\Database\Connection;
+
+class DatabaseBackendFactory {
+
+  /**
+   * The database connection.
+   *
+   * @var \Drupal\Core\Database\Connection
+   */
+  protected $connection;
+
+  /**
+   * Constructs the DatabaseBackendFactory object.
+   *
+   * @param \Drupal\Core\Database\Connection $connection
+   */
+  function __construct(Connection $connection) {
+    $this->connection = $connection;
+  }
+
+  /**
+   * Gets DatabaseBackend for the specified cache bin.
+   *
+   * @param $bin
+   *   The cache bin for which the object is created.
+   *
+   * @return \Drupal\Core\Cache\DatabaseBackend
+   *   The cache backend object for the specified cache bin.
+   */
+  function get($bin) {
+    return new DatabaseBackend($this->connection, $bin);
+  }
+
+}

core/lib/Drupal/Core/Cache/ListCacheBinsPass.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Cache\ListCacheBinsPass.
+ */
+
+namespace Drupal\Core\Cache;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+
+/**
+ * Adds cache_bins parameter to the container.
+ */
+class ListCacheBinsPass implements CompilerPassInterface {
+
+  /**
+   * Implements CompilerPassInterface::process().
+   *
+   * Collects the cache bins into the cache_bins parameter.
+   */
+  public function process(ContainerBuilder $container) {
+    $cache_bins = array();
+    foreach ($container->findTaggedServiceIds('cache.bin') as $id => $attributes) {
+      $cache_bins[$id] = substr($id, strpos($id, '.') + 1);
+    }
+    $container->setParameter('cache_bins', $cache_bins);
+  }
+}

core/lib/Drupal/Core/Cache/MemoryBackendFactory.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Cache\MemoryBackendFactory.
+ */
+
+namespace Drupal\Core\Cache;
+
+class MemoryBackendFactory {
+
+  /**
+   * Gets MemoryBackend for the specified cache bin.
+   *
+   * @param $bin
+   *   The cache bin for which the object is created.
+   *
+   * @return \Drupal\Core\Cache\MemoryBackend
+   *   The cache backend object for the specified cache bin.
+   */
+  function get($bin) {
+    return new MemoryBackend($bin);
+  }
+
+}

core/lib/Drupal/Core/CoreBundle.php

@@ -7,6 +7,8 @@
 
 namespace Drupal\Core;
 
+use Drupal\Core\Cache\CacheFactory;
+use Drupal\Core\Cache\ListCacheBinsPass;
 use Drupal\Core\DependencyInjection\Compiler\RegisterKernelListenersPass;
 use Drupal\Core\DependencyInjection\Compiler\RegisterAccessChecksPass;
 use Drupal\Core\DependencyInjection\Compiler\RegisterMatchersPass;
@@ -36,18 +38,11 @@ class CoreBundle extends Bundle {
    * Implements \Symfony\Component\HttpKernel\Bundle\BundleInterface::build().
    */
   public function build(ContainerBuilder $container) {
-
+    $this->registerCache($container);
     // Register active configuration storage.
     $container
       ->register('config.cachedstorage.storage', 'Drupal\Core\Config\FileStorage')
       ->addArgument(config_get_config_directory(CONFIG_ACTIVE_DIRECTORY));
-    // @todo Replace this with a cache.factory service plus 'config' argument.
-    $container
-      ->register('cache.config', 'Drupal\Core\Cache\CacheBackendInterface')
-      ->setFactoryClass('Drupal\Core\Cache\CacheFactory')
-      ->setFactoryMethod('get')
-