diff --git a/core/core.services.yml b/core/core.services.yml
index 7b326eb..f7b830f 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -60,7 +60,7 @@ services:
     arguments: ['@config.cachedstorage.storage', '@cache.config']
   config.context.factory:
     class: Drupal\Core\Config\Context\ConfigContextFactory
-    arguments: ['@event_dispatcher']
+    arguments: ['@event_dispatcher', '@uuid']
   config.context:
     class: Drupal\Core\Config\Context\ContextInterface
     tags:
diff --git a/core/includes/config.inc b/core/includes/config.inc
index 32ba50d..e8122f2 100644
--- a/core/includes/config.inc
+++ b/core/includes/config.inc
@@ -34,7 +34,8 @@ function config_install_default_config($type, $name) {
       Drupal::service('event_dispatcher'),
       Drupal::service('config.factory'),
       Drupal::entityManager(),
-      Drupal::lock()
+      Drupal::lock(),
+      Drupal::service('uuid')
     );
     $installer->import();
   }
diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index f3b3ccf..11a0f02 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -359,7 +359,8 @@ function install_begin_request(&$install_state) {
 
     $container->register('config.storage', 'Drupal\Core\Config\InstallStorage');
     $container->register('config.context.factory', 'Drupal\Core\Config\Context\ConfigContextFactory')
-      ->addArgument(new Reference('event_dispatcher'));
+      ->addArgument(new Reference('event_dispatcher'))
+      ->addArgument(new Reference('uuid'));
 
     $container->register('config.context', 'Drupal\Core\Config\Context\ContextInterface')
       ->setFactoryService(new Reference('config.context.factory'))
@@ -419,6 +420,9 @@ function install_begin_request(&$install_state) {
 
     $container->register('url_generator', 'Drupal\Core\Routing\NullGenerator');
 
+    // Register Uuid.
+    CoreBundle::registerUuid($container);
+
     Drupal::setContainer($container);
   }
 
diff --git a/core/includes/update.inc b/core/includes/update.inc
index 327dce2..524b9e4 100644
--- a/core/includes/update.inc
+++ b/core/includes/update.inc
@@ -13,7 +13,6 @@
 use Drupal\Core\Config\FileStorage;
 use Drupal\Core\Config\ConfigException;
 use Drupal\Core\DrupalKernel;
-use Drupal\Component\Uuid\Uuid;
 use Drupal\Component\Utility\NestedArray;
 use Symfony\Component\HttpFoundation\Request;
 
@@ -1487,7 +1486,7 @@ function update_variables_to_state(array $variable_map) {
  *   A $primary_key values of rows to be updated.
  */
 function update_add_uuids(&$sandbox, $table, $primary_key, $values) {
-  $uuid = new Uuid();
+  $uuid = Drupal::service('uuid');
   foreach ($values as $value) {
     db_update($table)
       ->fields(array(
diff --git a/core/lib/Drupal/Component/Uuid/Com.php b/core/lib/Drupal/Component/Uuid/Com.php
index 945a30b..df73a71 100644
--- a/core/lib/Drupal/Component/Uuid/Com.php
+++ b/core/lib/Drupal/Component/Uuid/Com.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\Component\Uuid\Com.
+ * Contains \Drupal\Component\Uuid\Com.
  */
 
 namespace Drupal\Component\Uuid;
@@ -12,9 +12,14 @@
  *
  * @see http://php.net/com_create_guid
  */
-class Com implements UuidInterface {
+class Com extends UuidBase implements UuidInterface {
+
+  /**
+   * {@inheritdoc}
+   */
   public function generate() {
     // Remove {} wrapper and make lower case to keep result consistent.
     return strtolower(trim(com_create_guid(), '{}'));
   }
+
 }
diff --git a/core/lib/Drupal/Component/Uuid/Pecl.php b/core/lib/Drupal/Component/Uuid/Pecl.php
index 3d4cb27..32ff7cf 100644
--- a/core/lib/Drupal/Component/Uuid/Pecl.php
+++ b/core/lib/Drupal/Component/Uuid/Pecl.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\Component\Uuid\Pecl.
+ * Contains \Drupal\Component\Uuid\Pecl.
  */
 
 namespace Drupal\Component\Uuid;
@@ -10,12 +10,13 @@
 /**
  * UUID implementation using the PECL extension.
  */
-class Pecl implements UuidInterface {
+class Pecl extends UuidBase implements UuidInterface {
 
   /**
-   * Implements Drupal\Component\Uuid\UuidInterface::generate().
+   * {@inheritdoc}
    */
   public function generate() {
     return uuid_create(UUID_TYPE_DEFAULT);
   }
+
 }
diff --git a/core/lib/Drupal/Component/Uuid/Php.php b/core/lib/Drupal/Component/Uuid/Php.php
index 3841f36..0991525 100644
--- a/core/lib/Drupal/Component/Uuid/Php.php
+++ b/core/lib/Drupal/Component/Uuid/Php.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\Component\Uuid\Php.
+ * Contains \Drupal\Component\Uuid\Php.
  */
 
 namespace Drupal\Component\Uuid;
@@ -16,10 +16,10 @@
  *
  * @see http://uuidtools.rubyforge.org/api/classes/UUIDTools/UUID.html
  */
-class Php implements UuidInterface {
+class Php extends UuidBase implements UuidInterface {
 
   /**
-   * Implements Drupal\Component\Uuid\UuidInterface::generate().
+   * {@inheritdoc}
    */
   public function generate() {
     $hex = substr(hash('sha256', Crypt::randomBytes(16)), 0, 32);
@@ -46,4 +46,5 @@ public function generate() {
 
     return $uuid;
   }
+
 }
diff --git a/core/lib/Drupal/Component/Uuid/Uuid.php b/core/lib/Drupal/Component/Uuid/Uuid.php
deleted file mode 100644
index 5df83ce..0000000
--- a/core/lib/Drupal/Component/Uuid/Uuid.php
+++ /dev/null
@@ -1,87 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\Component\Uuid\Uuid.
- */
-
-namespace Drupal\Component\Uuid;
-
-/**
- * Factory class for UUIDs.
- *
- * Determines which UUID implementation to use, and uses that to generate
- * and validate UUIDs.
- */
-class Uuid {
-
-  /**
-   * Holds the UUID implementation.
-   *
-   * @var Drupal\Component\Uuid\UuidInterface
-   */
-  protected $plugin;
-
-  /**
-   * Instantiates the correct UUID object.
-   */
-  public function __construct() {
-    $class = $this->determinePlugin();
-    $this->plugin = new $class();
-  }
-
-  /**
-   * Generates a universally unique identifier.
-   *
-   * @see Drupal\Component\Uuid\UuidInterface::generate()
-   */
-  public function generate() {
-    return $this->plugin->generate();
-  }
-
-  /**
-   * Checks that a string appears to be in the format of a UUID.
-   *
-   * Plugins should not implement validation, since UUIDs should be in a
-   * consistent format across all plugins.
-   *
-   * @param string $uuid
-   *   The string to test.
-   *
-   * @return bool
-   *   TRUE if the string is well formed, FALSE otherwise.
-   */
-  public function isValid($uuid) {
-    return preg_match("/^[0-9a-f]{8}-([0-9a-f]{4}-){3}[0-9a-f]{12}$/", $uuid);
-  }
-
-  /**
-   * Determines the optimal implementation to use for generating UUIDs.
-   *
-   * The selection is made based on the enabled PHP extensions with the
-   * most performant available option chosen.
-   *
-   * @return string
-   *  The class name for the optimal UUID generator.
-   */
-  protected function determinePlugin() {
-    static $plugin;
-    if (!empty($plugin)) {
-      return $plugin;
-    }
-
-    $plugin = 'Drupal\Component\Uuid\Php';
-
-    // Debian/Ubuntu uses the (broken) OSSP extension as their UUID
-    // implementation. The OSSP implementation is not compatible with the
-    // PECL functions.
-    if (function_exists('uuid_create') && !function_exists('uuid_make')) {
-      $plugin = 'Drupal\Component\Uuid\Pecl';
-    }
-    // Try to use the COM implementation for Windows users.
-    elseif (function_exists('com_create_guid')) {
-      $plugin = 'Drupal\Component\Uuid\Com';
-    }
-    return $plugin;
-  }
-}
diff --git a/core/lib/Drupal/Component/Uuid/UuidBase.php b/core/lib/Drupal/Component/Uuid/UuidBase.php
new file mode 100644
index 0000000..2bd285b
--- /dev/null
+++ b/core/lib/Drupal/Component/Uuid/UuidBase.php
@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Component\Uuid\UuidBase.
+ */
+
+namespace Drupal\Component\Uuid;
+
+/**
+ * Abstract bas class for Uuid classes.
+ */
+abstract class UuidBase {
+
+  /**
+   * Checks that a string appears to be in the format of a UUID.
+   *
+   * Plugins should not implement validation, since UUIDs should be in a
+   * consistent format across all plugins.
+   *
+   * @param string $uuid
+   *   The string to test.
+   *
+   * @return bool
+   *   TRUE if the string is well formed, FALSE otherwise.
+   */
+  public function isValid($uuid) {
+    return preg_match("/^[0-9a-f]{8}-([0-9a-f]{4}-){3}[0-9a-f]{12}$/", $uuid);
+  }
+
+}
diff --git a/core/lib/Drupal/Component/Uuid/UuidInterface.php b/core/lib/Drupal/Component/Uuid/UuidInterface.php
index d1225ba..a632f66 100644
--- a/core/lib/Drupal/Component/Uuid/UuidInterface.php
+++ b/core/lib/Drupal/Component/Uuid/UuidInterface.php
@@ -19,4 +19,19 @@
    *   A 32 byte integer represented as a hex string formatted with 4 hypens.
    */
   public function generate();
+
+  /**
+   * Checks that a string appears to be in the format of a UUID.
+   *
+   * Plugins should not implement validation, since UUIDs should be in a
+   * consistent format across all plugins.
+   *
+   * @param string $uuid
+   *   The string to test.
+   *
+   * @return bool
+   *   TRUE if the string is well formed, FALSE otherwise.
+   */
+  public function isValid($uuid);
+
 }
diff --git a/core/lib/Drupal/Core/Config/ConfigImporter.php b/core/lib/Drupal/Core/Config/ConfigImporter.php
index d496fe7..f5aff08 100644
--- a/core/lib/Drupal/Core/Config/ConfigImporter.php
+++ b/core/lib/Drupal/Core/Config/ConfigImporter.php
@@ -10,6 +10,7 @@
 use Drupal\Core\Config\Context\FreeConfigContext;
 use Drupal\Core\Entity\EntityManager;
 use Drupal\Core\Lock\LockBackendInterface;
+use Drupal\Component\Uuid\UuidInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
 /**
@@ -108,18 +109,21 @@ class ConfigImporter {
    *   The entity manager used to import config entities.
    * @param \Drupal\Core\Lock\LockBackendInterface
    *   The lock backend to ensure multiple imports do not occur at the same time.
+   * @param \Drupal\Component\Uuid\UuidInterface $uuid
+   *   The uuid service.
    */
-  public function __construct(StorageComparerInterface $storage_comparer, EventDispatcherInterface $event_dispatcher, ConfigFactory $config_factory, EntityManager $entity_manager, LockBackendInterface $lock) {
+  public function __construct(StorageComparerInterface $storage_comparer, EventDispatcherInterface $event_dispatcher, ConfigFactory $config_factory, EntityManager $entity_manager, LockBackendInterface $lock, UuidInterface $uuid) {
     $this->storageComparer = $storage_comparer;
     $this->eventDispatcher = $event_dispatcher;
     $this->configFactory = $config_factory;
     $this->entityManager = $entity_manager;
     $this->lock = $lock;
+    $this->uuidService = $uuid;
     $this->processed = $this->storageComparer->getEmptyChangelist();
     // Use an override free context for importing so that overrides to do not
     // pollute the imported data. The context is hard coded to ensure this is
     // the case.
-    $this->context = new FreeConfigContext($this->eventDispatcher);
+    $this->context = new FreeConfigContext($this->eventDispatcher, $this->uuidService);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Config/Context/ConfigContext.php b/core/lib/Drupal/Core/Config/Context/ConfigContext.php
index a5382fd..fbd8b96 100644
--- a/core/lib/Drupal/Core/Config/Context/ConfigContext.php
+++ b/core/lib/Drupal/Core/Config/Context/ConfigContext.php
@@ -10,7 +10,7 @@
 use Drupal\Core\Config\Config;
 use Drupal\Core\Config\ConfigEvent;
 use Drupal\Component\Utility\NestedArray;
-use Drupal\Component\Uuid\Uuid;
+use Drupal\Component\Uuid\UuidInterface;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 
 /**
@@ -50,13 +50,23 @@ class ConfigContext implements ContextInterface {
   protected $uuid;
 
   /**
+   * The Uuid service.
+   *
+   * @var \Drupal\Core\Component\Uuid\UuidInterface
+   */
+  protected $uuidService;
+
+  /**
    * Constructs the configuration context.
    *
    * @param \Symfony\Component\EventDispatcher\EventDispatcher $event_dispatcher
    *   An event dispatcher instance to use for configuration events.
+   * @param \Drupal\Core\Component\Uuid\UuidInterface
+   *   The Uuid service.
    */
-  public function __construct(EventDispatcher $event_dispatcher) {
+  public function __construct(EventDispatcher $event_dispatcher, UuidInterface $uuid) {
     $this->eventDispatcher = $event_dispatcher;
+    $this->uuidService = $uuid;
   }
 
   /**
@@ -89,8 +99,7 @@ public function set($key, $value) {
    * Implements \Drupal\Core\Config\Context\ContextInterface::setUuid().
    */
   public function setUuid() {
-    $uuid = new Uuid();
-    $this->uuid = $uuid->generate();
+    $this->uuid = $this->uuidService->generate();
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Config/Context/ConfigContextFactory.php b/core/lib/Drupal/Core/Config/Context/ConfigContextFactory.php
index 1642380..12a1ab9 100644
--- a/core/lib/Drupal/Core/Config/Context/ConfigContextFactory.php
+++ b/core/lib/Drupal/Core/Config/Context/ConfigContextFactory.php
@@ -9,6 +9,7 @@
 
 use Drupal\Core\Config\Config;
 use Drupal\Core\Config\ConfigException;
+use Drupal\Component\Uuid\UuidInterface;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 
 /**
@@ -28,13 +29,23 @@ class ConfigContextFactory {
   protected $eventDispatcher;
 
   /**
+   * The Uuid service.
+   *
+   * @var \Drupal\Core\Component\Uuid\UuidInterface
+   */
+  protected $uuidService;
+
+  /**
    * Constructs the configuration context.
    *
    * @param \Symfony\Component\EventDispatcher\EventDispatcher $event_dispatcher
    *   An event dispatcher instance to use for configuration events.
+   * @param \Drupal\Core\Component\Uuid\UuidInterface
+   *   The Uuid service.
    */
-  public function __construct(EventDispatcher $event_dispatcher) {
+  public function __construct(EventDispatcher $event_dispatcher, UuidInterface $uuid) {
     $this->eventDispatcher = $event_dispatcher;
+    $this->uuidService = $uuid;
   }
 
   /**
@@ -52,7 +63,7 @@ public function get($class = NULL) {
       $class = 'Drupal\Core\Config\Context\ConfigContext';
     }
     if (class_exists($class)) {
-      $context = new $class($this->eventDispatcher);
+      $context = new $class($this->eventDispatcher, $this->uuidService);
     }
     else {
       throw new ConfigException(sprintf('Unknown config context class: %s', $class));
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php b/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php
index 79554d6..1a1eed9 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\Core\Config\Entity;
 
-use Drupal\Component\Uuid\Uuid;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityControllerInterface;
 use Drupal\Core\Entity\EntityMalformedException;
@@ -15,6 +14,7 @@
 use Drupal\Core\Config\Config;
 use Drupal\Core\Config\ConfigFactory;
 use Drupal\Core\Config\StorageInterface;
+use Drupal\Component\Uuid\UuidInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -74,6 +74,13 @@ class ConfigStorageController implements EntityStorageControllerInterface, Entit
   protected $uuidKey = 'uuid';
 
   /**
+   * The Uuid service.
+   *
+   * @var \Drupal\Core\Component\Uuid\UuidInterface
+   */
+  protected $uuidService;
+
+  /**
    * Name of the entity's status key or FALSE if a status is not supported.
    *
    * @var string|bool
@@ -106,7 +113,7 @@ class ConfigStorageController implements EntityStorageControllerInterface, Entit
    * @param \Drupal\Core\Config\StorageInterface $config_storage
    *   The config storage service.
    */
-  public function __construct($entity_type, array $entity_info, ConfigFactory $config_factory, StorageInterface $config_storage) {
+  public function __construct($entity_type, array $entity_info, ConfigFactory $config_factory, StorageInterface $config_storage, UuidInterface $uuid_service) {
     $this->entityType = $entity_type;
     $this->entityInfo = $entity_info;
     $this->hookLoadArguments = array();
@@ -121,6 +128,7 @@ public function __construct($entity_type, array $entity_info, ConfigFactory $con
 
     $this->configFactory = $config_factory;
     $this->configStorage = $config_storage;
+    $this->uuidService = $uuid_service;
   }
 
   /**
@@ -131,7 +139,8 @@ public static function createInstance(ContainerInterface $container, $entity_typ
       $entity_type,
       $entity_info,
       $container->get('config.factory'),
-      $container->get('config.storage')
+      $container->get('config.storage'),
+      $container->get('uuid')
     );
   }
 
@@ -340,8 +349,7 @@ public function create(array $values) {
 
     // Assign a new UUID if there is none yet.
     if (!isset($entity->{$this->uuidKey})) {
-      $uuid = new Uuid();
-      $entity->{$this->uuidKey} = $uuid->generate();
+      $entity->{$this->uuidKey} = $this->uuidService->generate();
     }
 
     // Modules might need to add or change the data initially held by the new
diff --git a/core/lib/Drupal/Core/CoreBundle.php b/core/lib/Drupal/Core/CoreBundle.php
index 472105a..9fd5255 100644
--- a/core/lib/Drupal/Core/CoreBundle.php
+++ b/core/lib/Drupal/Core/CoreBundle.php
@@ -47,6 +47,7 @@ public function build(ContainerBuilder $container) {
     $container->addScope(new Scope('request'));
     $this->registerTwig($container);
     $this->registerModuleHandler($container);
+    $this->registerUuid($container);
 
     $container->addCompilerPass(new RegisterMatchersPass());
     $container->addCompilerPass(new RegisterRouteFiltersPass());
@@ -121,4 +122,31 @@ public static function registerTwig(ContainerBuilder $container) {
       ->addMethodCall('addExtension', array(new Definition('Twig_Extension_Debug')));
   }
 
+  /**
+   * Determines and registers the Uuid service.
+   *
+   * @param \Symfony\Component\DependencyInjection\ContainerBuilder $container
+   *   The container.
+   *
+   * @return string
+   *   Class name for the Uuid service.
+   */
+  public static function registerUuid(ContainerBuilder $container) {
+    $uuid_class = 'Drupal\Component\Uuid\Php';
+
+    // Debian/Ubuntu uses the (broken) OSSP extension as their UUID
+    // implementation. The OSSP implementation is not compatible with the
+    // PECL functions.
+    if (function_exists('uuid_create') && !function_exists('uuid_make')) {
+      $uuid_class = 'Drupal\Component\Uuid\Pecl';
+    }
+    // Try to use the COM implementation for Windows users.
+    elseif (function_exists('com_create_guid')) {
+      $uuid_class = 'Drupal\Component\Uuid\Com';
+    }
+
+    $container->register('uuid', $uuid_class);
+    return $uuid_class;
+  }
+
 }
diff --git a/core/lib/Drupal/Core/Entity/DatabaseStorageController.php b/core/lib/Drupal/Core/Entity/DatabaseStorageController.php
index f3a8790..050c36b 100644
--- a/core/lib/Drupal/Core/Entity/DatabaseStorageController.php
+++ b/core/lib/Drupal/Core/Entity/DatabaseStorageController.php
@@ -11,10 +11,9 @@
 use PDO;
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\Entity\Query\QueryInterface;
-use Drupal\Component\Uuid\Uuid;
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Database\Connection;
-
+use Drupal\Component\Uuid\UuidInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -92,6 +91,13 @@ class DatabaseStorageController implements EntityStorageControllerInterface, Ent
   protected $uuidKey;
 
   /**
+   * The Uuid service.
+   *
+   * @var \Drupal\Core\Component\Uuid\UuidInterface
+   */
+  protected $uuidService;
+
+  /**
    * Name of entity's revision database table field, if it supports revisions.
    *
    * Has the value FALSE if this entity does not use revisions.
@@ -130,7 +136,8 @@ public static function createInstance(ContainerInterface $container, $entity_typ
     return new static(
       $entity_type,
       $entity_info,
-      $container->get('database')
+      $container->get('database'),
+      $container->get('uuid')
     );
   }
 
@@ -144,10 +151,12 @@ public static function createInstance(ContainerInterface $container, $entity_typ
    * @param \Drupal\Core\Database\Connection $database
    *   The database connection to be used.
    */
-  public function __construct($entity_type, array $entity_info, Connection $database) {
+  public function __construct($entity_type, array $entity_info, Connection $database, UuidInterface $uuid_service) {
     $this->database = $database;
     $this->entityType = $entity_type;
     $this->entityInfo = $entity_info;
+    $this->uuidService = $uuid_service;
+
     $this->entityCache = array();
     $this->hookLoadArguments = array();
 
@@ -483,8 +492,7 @@ public function create(array $values) {
 
     // Assign a new UUID if there is none yet.
     if ($this->uuidKey && !isset($entity->{$this->uuidKey})) {
-      $uuid = new Uuid();
-      $entity->{$this->uuidKey} = $uuid->generate();
+      $entity->{$this->uuidKey} = $this->uuidService->generate();
     }
 
     // Modules might need to add or change the data initially held by the new
diff --git a/core/lib/Drupal/Core/Entity/DatabaseStorageControllerNG.php b/core/lib/Drupal/Core/Entity/DatabaseStorageControllerNG.php
index 91ec62d..5766010 100644
--- a/core/lib/Drupal/Core/Entity/DatabaseStorageControllerNG.php
+++ b/core/lib/Drupal/Core/Entity/DatabaseStorageControllerNG.php
@@ -9,13 +9,12 @@
 
 use Drupal\Core\Language\Language;
 use PDO;
-
 use Drupal\Core\Entity\Query\QueryInterface;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\DatabaseStorageController;
 use Drupal\Core\Entity\EntityStorageException;
 use Drupal\Core\TypedData\ComplexDataInterface;
-use Drupal\Component\Uuid\Uuid;
+use Drupal\Component\Uuid\UuidInterface;
 use Drupal\Core\Database\Connection;
 
 /**
@@ -54,8 +53,8 @@ class DatabaseStorageControllerNG extends DatabaseStorageController {
   /**
    * Overrides DatabaseStorageController::__construct().
    */
-  public function __construct($entity_type, array $entity_info, Connection $database) {
-    parent::__construct($entity_type,$entity_info, $database);
+  public function __construct($entity_type, array $entity_info, Connection $database, UuidInterface $uuid_service) {
+    parent::__construct($entity_type,$entity_info, $database, $uuid_service);
     $this->bundleKey = !empty($this->entityInfo['entity_keys']['bundle']) ? $this->entityInfo['entity_keys']['bundle'] : FALSE;
     $this->entityClass = $this->entityInfo['class'];
 
@@ -115,8 +114,7 @@ public function create(array $values) {
 
     // Assign a new UUID if there is none yet.
     if ($this->uuidKey && !isset($entity->{$this->uuidKey}->value)) {
-      $uuid = new Uuid();
-      $entity->{$this->uuidKey} = $uuid->generate();
+      $entity->{$this->uuidKey} =  $this->uuidService->generate();
     }
 
     // Modules might need to add or change the data initially held by the new
diff --git a/core/lib/Drupal/Core/Entity/Entity.php b/core/lib/Drupal/Core/Entity/Entity.php
index 9798515..447024e 100644
--- a/core/lib/Drupal/Core/Entity/Entity.php
+++ b/core/lib/Drupal/Core/Entity/Entity.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\Core\Entity;
 
-use Drupal\Component\Uuid\Uuid;
 use Drupal\Core\Language\Language;
 use Drupal\Core\TypedData\TypedDataInterface;
 use Drupal\user\UserInterface;
@@ -354,8 +353,9 @@ public function createDuplicate() {
 
     // Check if the entity type supports UUIDs and generate a new one if so.
     if (!empty($entity_info['entity_keys']['uuid'])) {
-      $uuid = new Uuid();
-      $duplicate->{$entity_info['entity_keys']['uuid']} = $uuid->generate();
+      // @todo Inject the uuid service into the storage controller once
+      //    possible.
+      $duplicate->{$entity_info['entity_keys']['uuid']} = \Drupal::service('uuid')->generate();
     }
     return $duplicate;
   }
diff --git a/core/lib/Drupal/Core/Entity/EntityNG.php b/core/lib/Drupal/Core/Entity/EntityNG.php
index 078094c..a1970f6 100644
--- a/core/lib/Drupal/Core/Entity/EntityNG.php
+++ b/core/lib/Drupal/Core/Entity/EntityNG.php
@@ -9,7 +9,6 @@
 
 use Drupal\Core\Language\Language;
 use Drupal\Core\TypedData\TypedDataInterface;
-use Drupal\Component\Uuid\Uuid;
 use ArrayIterator;
 use InvalidArgumentException;
 
@@ -487,8 +486,9 @@ public function createDuplicate() {
 
     // Check if the entity type supports UUIDs and generate a new one if so.
     if (!empty($entity_info['entity_keys']['uuid'])) {
-      $uuid = new Uuid();
-      $duplicate->{$entity_info['entity_keys']['uuid']}->value = $uuid->generate();
+      // @todo Inject the uuid service into the storage controller once
+      //    possible.
+      $duplicate->{$entity_info['entity_keys']['uuid']}->value = \Drupal::service('uuid')->generate();
     }
 
     // Check whether the entity type supports revisions and initialize it if so.
diff --git a/core/modules/block/block.install b/core/modules/block/block.install
index ec72d06..8d6c756 100644
--- a/core/modules/block/block.install
+++ b/core/modules/block/block.install
@@ -4,7 +4,7 @@
  * @file
  * Install, update and uninstall functions for the block module.
  */
-use Drupal\Component\Uuid\Uuid;
+
 use Drupal\Core\Language\Language;
 
 /**
@@ -194,7 +194,7 @@ function block_update_8007() {
   // Populate the {custom_block} and {custom_block_revision} table.
   $results = db_select('block_custom', 'bc')->fields('bc')->execute();
 
-  $uuid = new Uuid();
+  $uuid = Drupal::service('uuid');
   $execute = FALSE;
   $block_insert = db_insert('custom_block')->fields(array(
     'id',
diff --git a/core/modules/comment/lib/Drupal/comment/CommentStorageController.php b/core/modules/comment/lib/Drupal/comment/CommentStorageController.php
index eef80c8..76a5e3d 100644
--- a/core/modules/comment/lib/Drupal/comment/CommentStorageController.php
+++ b/core/modules/comment/lib/Drupal/comment/CommentStorageController.php
@@ -9,7 +9,6 @@
 
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\DatabaseStorageControllerNG;
-use Drupal\Component\Uuid\Uuid;
 use LogicException;
 
 /**
diff --git a/core/modules/config/config.admin.inc b/core/modules/config/config.admin.inc
index e7d5ce7..a6dba62 100644
--- a/core/modules/config/config.admin.inc
+++ b/core/modules/config/config.admin.inc
@@ -128,7 +128,8 @@ function config_admin_import_form_submit($form, &$form_state) {
     Drupal::service('event_dispatcher'),
     Drupal::service('config.factory'),
     Drupal::entityManager(),
-    Drupal::lock()
+    Drupal::lock(),
+    Drupal::service('uuid')
   );
   if ($config_importer->alreadyImporting()) {
     drupal_set_message(t('Another request may be synchronizing configuration already.'));
diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigImporterTest.php b/core/modules/config/lib/Drupal/config/Tests/ConfigImporterTest.php
index aa133d5..f85150f 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigImporterTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigImporterTest.php
@@ -60,7 +60,8 @@ function setUp() {
       $this->container->get('event_dispatcher'),
       $this->container->get('config.factory'),
       $this->container->get('plugin.manager.entity'),
-      $this->container->get('lock')
+      $this->container->get('lock'),
+      $this->container->get('uuid')
     );
     $this->copyConfig($this->container->get('config.storage'), $this->container->get('config.storage.staging'));
   }
diff --git a/core/modules/contact/contact.install b/core/modules/contact/contact.install
index eaac51c..8dab029 100644
--- a/core/modules/contact/contact.install
+++ b/core/modules/contact/contact.install
@@ -5,7 +5,6 @@
  * Install, update and uninstall functions for the contact module.
  */
 
-use Drupal\Component\Uuid\Uuid;
 use Drupal\Core\Language\Language;
 
 /**
@@ -54,7 +53,7 @@ function contact_update_8000() {
  * @ingroup config_upgrade
  */
 function contact_update_8001() {
-  $uuid = new Uuid();
+  $uuid = Drupal::service('uuid');
   $result = db_query('SELECT * FROM {contact}');
   foreach ($result as $category) {
     // Take over the category's serial ID as new machine name.
diff --git a/core/modules/entity/entity.install b/core/modules/entity/entity.install
index af2aba1..5a118c0 100644
--- a/core/modules/entity/entity.install
+++ b/core/modules/entity/entity.install
@@ -5,8 +5,6 @@
  * Install, update and uninstall functions for the entity module.
  */
 
-use Drupal\Component\Uuid\Uuid;
-
 /**
  * Returns the raw configuration object for an EntityDisplay entity.
  *
@@ -31,7 +29,7 @@ function _update_8000_entity_get_display($entity_type, $bundle, $view_mode) {
   }
 
   // Initialize a fresh structure.
-  $uuid = new Uuid();
+  $uuid = Drupal::service('uuid');
   $properties = array(
     'id' => $id,
     'uuid' => $uuid->generate(),
@@ -70,7 +68,7 @@ function _update_8000_entity_get_form_display($entity_type, $bundle, $form_mode)
   }
 
   // Initialize a fresh structure.
-  $uuid = new Uuid();
+  $uuid = Drupal::service('uuid');
   $properties = array(
     'id' => $id,
     'uuid' => $uuid->generate(),
diff --git a/core/modules/field/field.install b/core/modules/field/field.install
index 7cfa1f6..ab02f94 100644
--- a/core/modules/field/field.install
+++ b/core/modules/field/field.install
@@ -5,7 +5,6 @@
  * Install, update, and uninstall functions for the Field module.
  */
 
-use Drupal\Component\Uuid\Uuid;
 use Drupal\field\Plugin\Core\Entity\Field;
 
 /**
@@ -241,8 +240,7 @@ function field_update_8002() {
  * Convert fields and instances to config.
  */
 function field_update_8003() {
-  $uuid = new Uuid();
-
+  $uuid = Drupal::service('uuid');
   $state = Drupal::state();
   $deleted_fields = $state->get('field.field.deleted') ?: array();
   $deleted_instances = $state->get('field.instance.deleted') ?: array();
diff --git a/core/modules/filter/filter.install b/core/modules/filter/filter.install
index b450c36..42512a6 100644
--- a/core/modules/filter/filter.install
+++ b/core/modules/filter/filter.install
@@ -5,8 +5,6 @@
  * Install, update, and uninstall functions for the Filter module.
  */
 
-use Drupal\Component\Uuid\Uuid;
-
 /**
  * @addtogroup updates-7.x-to-8.x
  * @{
@@ -29,7 +27,7 @@ function filter_update_8000() {
  * @ingroup config_upgrade
  */
 function filter_update_8001() {
-  $uuid = new Uuid();
+  $uuid = Drupal::service('uuid');
   $result = db_query('SELECT format, name, cache, status, weight FROM {filter_format}', array(), array('fetch' => PDO::FETCH_ASSOC));
   foreach ($result as $format) {
     $id = $format['format'];
diff --git a/core/modules/image/image.install b/core/modules/image/image.install
index 8a05660..aa78b94 100644
--- a/core/modules/image/image.install
+++ b/core/modules/image/image.install
@@ -5,8 +5,6 @@
  * Install, update and uninstall functions for the image module.
  */
 
-use Drupal\Component\Uuid\Uuid;
-
 /**
  * Implements hook_install().
  */
@@ -129,7 +127,7 @@ function _image_update_get_style_with_effects(array $style) {
     $effect['data'] = unserialize($effect['data']);
 
     // Generate a unique image effect ID for the effect.
-    $uuid = new Uuid();
+    $uuid = Drupal::service('uuid');
     $effect['ieid'] = $uuid->generate();
 
     $effects[$effect['ieid']] = $effect;
diff --git a/core/modules/image/image.module b/core/modules/image/image.module
index 2304c7d..657e528 100644
--- a/core/modules/image/image.module
+++ b/core/modules/image/image.module
@@ -13,7 +13,6 @@
 use Symfony\Component\HttpFoundation\BinaryFileResponse;
 use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
 use Drupal\Component\Utility\Crypt;
-use Drupal\Component\Uuid\Uuid;
 use Drupal\file\Plugin\Core\Entity\File;
 use Drupal\image\Plugin\Core\Entity\ImageStyle;
 
@@ -948,7 +947,7 @@ function image_effect_save($style, &$effect) {
 
   // Generate a unique image effect ID for a new effect.
   if (empty($effect['ieid'])) {
-    $uuid = new Uuid();
+    $uuid = Drupal::service('uuid');
     $effect['ieid'] = $uuid->generate();
   }
   $style->effects[$effect['ieid']] = $effect;
diff --git a/core/modules/menu/menu.install b/core/modules/menu/menu.install
index ae94f90..5b2fc2b 100644
--- a/core/modules/menu/menu.install
+++ b/core/modules/menu/menu.install
@@ -5,8 +5,6 @@
  * Install, update and uninstall functions for the menu module.
  */
 
-use Drupal\Component\Uuid\Uuid;
-
 /**
  * Implements hook_uninstall().
  */
@@ -76,7 +74,7 @@ function menu_update_8003() {
  * @ingroup config_upgrade
  */
 function menu_update_8004() {
-  $uuid = new Uuid();
+  $uuid = Drupal::service('uuid');
   $result = db_query('SELECT * FROM {menu_custom}');
   foreach ($result as $menu) {
     // Save the config object.
diff --git a/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkStorageController.php b/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkStorageController.php
index 6a3eddb..54d3cea 100644
--- a/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkStorageController.php
+++ b/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkStorageController.php
@@ -11,6 +11,7 @@
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityStorageException;
 use Drupal\Core\Database\Connection;
+use Drupal\Component\Uuid\UuidInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Cmf\Component\Routing\RouteProviderInterface;
 use Symfony\Component\HttpFoundation\Request;
@@ -56,8 +57,8 @@ class MenuLinkStorageController extends DatabaseStorageController {
    * @param \Symfony\Cmf\Component\Routing\RouteProviderInterface $route_provider
    *   The route provider service.
    */
-  public function __construct($entity_type, array $entity_info, Connection $database, RouteProviderInterface $route_provider) {
-    parent::__construct($entity_type, $entity_info, $database);
+  public function __construct($entity_type, array $entity_info, Connection $database, UuidInterface $uuid_service, RouteProviderInterface $route_provider) {
+    parent::__construct($entity_type, $entity_info, $database, $uuid_service);
 
     $this->routeProvider = $route_provider;
 
@@ -74,6 +75,7 @@ public static function createInstance(ContainerInterface $container, $entity_typ
       $entity_type,
       $entity_info,
       $container->get('database'),
+      $container->get('uuid'),
       $container->get('router.route_provider')
     );
   }
diff --git a/core/modules/shortcut/shortcut.install b/core/modules/shortcut/shortcut.install
index d78fa3b..ba7c324 100644
--- a/core/modules/shortcut/shortcut.install
+++ b/core/modules/shortcut/shortcut.install
@@ -5,8 +5,6 @@
  * Install, update and uninstall functions for the shortcut module.
  */
 
-use Drupal\Component\Uuid\Uuid;
-
 /**
  * Implements hook_uninstall().
  */
@@ -68,7 +66,7 @@ function shortcut_schema() {
  * Migrate shortcuts into configuration.
  */
 function shortcut_update_8000() {
-  $uuid = new Uuid();
+  $uuid = Drupal::service('uuid');
   $result = db_query('SELECT * from {shortcut_set}');
   $ids = array();
   foreach ($result as $set) {
diff --git a/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php b/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
index d3ba7b3..b688f21 100644
--- a/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
+++ b/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
@@ -1305,7 +1305,8 @@ public function configImporter() {
         $this->container->get('event_dispatcher'),
         $this->container->get('config.factory'),
         $this->container->get('plugin.manager.entity'),
-        $this->container->get('lock')
+        $this->container->get('lock'),
+        $this->container->get('uuid')
       );
     }
     // Always recalculate the changelist when called.
diff --git a/core/modules/system/lib/Drupal/system/Tests/Entity/EntityUUIDTest.php b/core/modules/system/lib/Drupal/system/Tests/Entity/EntityUUIDTest.php
index 0168bb3..86ae833 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Entity/EntityUUIDTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Entity/EntityUUIDTest.php
@@ -7,8 +7,6 @@
 
 namespace Drupal\system\Tests\Entity;
 
-use Drupal\Component\Uuid\Uuid;
-
 /**
  * Tests creation, saving, and loading of entity UUIDs.
  */
@@ -54,7 +52,7 @@ function testCRUD() {
    */
   protected function assertCRUD($entity_type) {
     // Verify that no UUID is auto-generated when passing one for creation.
-    $uuid_service = new Uuid();
+    $uuid_service = $this->container->get('uuid');
     $uuid = $uuid_service->generate();
     $custom_entity = entity_create($entity_type, array(
       'name' => $this->randomName(),
diff --git a/core/modules/system/lib/Drupal/system/Tests/Uuid/UuidUnitTest.php b/core/modules/system/lib/Drupal/system/Tests/Uuid/UuidUnitTest.php
deleted file mode 100644
index 579ff33..0000000
--- a/core/modules/system/lib/Drupal/system/Tests/Uuid/UuidUnitTest.php
+++ /dev/null
@@ -1,77 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Uuid\UuidUnitTest.
-*/
-
-namespace Drupal\system\Tests\Uuid;
-
-use Drupal\Component\Uuid\Uuid;
-use Drupal\simpletest\UnitTestBase;
-
-/**
- * Tests the Drupal\Component\Uuid\Uuid class.
- */
-class UuidUnitTest extends UnitTestBase {
-
-  /**
-   * The UUID object to be used for generating UUIDs.
-   *
-   * @var Drupal\Component\Uuid\UuidInterface
-   */
-  protected $uuid;
-
-  public static function getInfo() {
-    return array(
-      'name' => 'UUID handling',
-      'description' => "Test the handling of Universally Unique IDentifiers (UUIDs).",
-      'group' => 'UUID',
-    );
-  }
-
-  public function setUp() {
-    // Initiate the generator. This will lazy-load uuid.inc.
-    $this->uuid = new Uuid();
-    parent::setUp();
-  }
-
-  /**
-   * Tests generating a UUID.
-   */
-  public function testGenerateUuid() {
-    $uuid = $this->uuid->generate();
-    $this->assertTrue($this->uuid->isValid($uuid), 'UUID generation works.');
-  }
-
-  /**
-   * Tests that generated UUIDs are unique.
-   */
-  public function testUuidIsUnique() {
-    $uuid1 = $this->uuid->generate();
-    $uuid2 = $this->uuid->generate();
-    $this->assertNotEqual($uuid1, $uuid2, 'Same UUID was not generated twice.');
-  }
-
-  /**
-   * Tests UUID validation.
-   */
-  function testUuidValidation() {
-    // These valid UUIDs.
-    $uuid_fqdn = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
-    $uuid_min = '00000000-0000-0000-0000-000000000000';
-    $uuid_max = 'ffffffff-ffff-ffff-ffff-ffffffffffff';
-
-    $this->assertTrue($this->uuid->isValid($uuid_fqdn), format_string('FQDN namespace UUID (@uuid) is valid', array('@uuid' => $uuid_fqdn)));
-    $this->assertTrue($this->uuid->isValid($uuid_min), format_string('Minimum UUID value (@uuid) is valid', array('@uuid' => $uuid_min)));
-    $this->assertTrue($this->uuid->isValid($uuid_max), format_string('Maximum UUID value (@uuid) is valid', array('@uuid' => $uuid_max)));
-
-    // These are invalid UUIDs.
-    $invalid_format = '0ab26e6b-f074-4e44-9da-601205fa0e976';
-    $invalid_length = '0ab26e6b-f074-4e44-9daf-1205fa0e9761f';
-
-    $this->assertFalse($this->uuid->isValid($invalid_format), format_string('@uuid is not a valid UUID', array('@uuid' => $invalid_format)));
-    $this->assertFalse($this->uuid->isValid($invalid_length), format_string('@uuid is not a valid UUID', array('@uuid' => $invalid_length)));
-
-  }
-}
diff --git a/core/modules/taxonomy/taxonomy.install b/core/modules/taxonomy/taxonomy.install
index d89b89c..3380888 100644
--- a/core/modules/taxonomy/taxonomy.install
+++ b/core/modules/taxonomy/taxonomy.install
@@ -5,8 +5,6 @@
  * Install, update and uninstall functions for the taxonomy module.
  */
 
-use Drupal\Component\Uuid\Uuid;
-
 /**
  * Implements hook_uninstall().
  */
@@ -295,7 +293,7 @@ function taxonomy_update_8004() {
  * Convert vocabularies into configuration.
  */
 function taxonomy_update_8005() {
-  $uuid = new Uuid();
+  $uuid = Drupal::service('uuid');
 
   $result = db_query('SELECT * FROM {taxonomy_vocabulary}');
   foreach ($result as $vocabulary) {
diff --git a/core/modules/user/lib/Drupal/user/UserStorageController.php b/core/modules/user/lib/Drupal/user/UserStorageController.php
index c8d40fd..b9f0bbe 100644
--- a/core/modules/user/lib/Drupal/user/UserStorageController.php
+++ b/core/modules/user/lib/Drupal/user/UserStorageController.php
@@ -11,6 +11,7 @@
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Password\PasswordInterface;
 use Drupal\Core\Database\Connection;
+use Drupal\Component\Uuid\UuidInterface;
 use Drupal\user\UserDataInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Drupal\Core\Entity\DatabaseStorageControllerNG;
@@ -51,8 +52,8 @@ class UserStorageController extends DatabaseStorageControllerNG {
    * @param \Drupal\user\UserDataInterface $user_data
    *   The user data service.
    */
-  public function __construct($entity_type, $entity_info, Connection $database, PasswordInterface $password, UserDataInterface $user_data) {
-    parent::__construct($entity_type, $entity_info, $database);
+  public function __construct($entity_type, $entity_info, Connection $database, UuidInterface $uuid_service, PasswordInterface $password, UserDataInterface $user_data) {
+    parent::__construct($entity_type, $entity_info, $database, $uuid_service);
 
     $this->password = $password;
     $this->userData = $user_data;
@@ -66,6 +67,7 @@ public static function createInstance(ContainerInterface $container, $entity_typ
       $entity_type,
       $entity_info,
       $container->get('database'),
+      $container->get('uuid'),
       $container->get('password'),
       $container->get('user.data')
     );
diff --git a/core/modules/user/user.install b/core/modules/user/user.install
index 69d96b6..b542833 100644
--- a/core/modules/user/user.install
+++ b/core/modules/user/user.install
@@ -5,7 +5,6 @@
  * Install, update and uninstall functions for the user module.
  */
 
-use Drupal\Component\Uuid\Uuid;
 use Drupal\Core\Language\Language;
 
 /**
@@ -690,7 +689,7 @@ function user_update_8011() {
     // of file_save_data() by updating an eventually existing record for that
     // file.
     file_unmanaged_save_data($default_image, $destination, FILE_EXISTS_REPLACE);
-    $uuid = new Uuid();
+    $uuid = Drupal::service('uuid');
     db_merge('file_managed')
       ->key(array(
         'uri' => $destination,
@@ -1033,7 +1032,7 @@ function user_update_8016() {
  * @ingroup config_upgrade
  */
 function user_update_8017() {
-  $uuid = new Uuid();
+  $uuid = Drupal::service('uuid');
 
   $roles = db_select('role', 'r')
     ->fields('r')
diff --git a/core/modules/views/lib/Drupal/views/Tests/ViewTestData.php b/core/modules/views/lib/Drupal/views/Tests/ViewTestData.php
index 3f2bfd1..e08d7dd 100644
--- a/core/modules/views/lib/Drupal/views/Tests/ViewTestData.php
+++ b/core/modules/views/lib/Drupal/views/Tests/ViewTestData.php
@@ -66,7 +66,8 @@ public static function importTestViews($class, $modules = array()) {
           \Drupal::service('event_dispatcher'),
           \Drupal::service('config.factory'),
           \Drupal::entityManager(),
-          \Drupal::lock()
+          \Drupal::lock(),
+          \Drupal::service('uuid')
         );
         $installer->import();
       }
diff --git a/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php b/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php
new file mode 100644
index 0000000..3cfed16
--- /dev/null
+++ b/core/tests/Drupal/Tests/Component/Uuid/UuidTest.php
@@ -0,0 +1,101 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Tests\Component\Uuid\UuidTest.
+ */
+
+namespace Drupal\Tests\Component\Uuid;
+
+use Drupal\Tests\UnitTestCase;
+use Drupal\Core\CoreBundle;
+
+/**
+ * Tests the Drupal\Component\Uuid\Uuid class.
+ */
+class UuidTest extends UnitTestCase {
+
+  /**
+   * An array of uuid classes which can be tested by the current environment.
+   *
+   * @var array
+   */
+  protected $uuidInstances = array();
+
+
+  public static function getInfo() {
+    return array(
+      'name' => 'UUID handling',
+      'description' => "Test the handling of Universally Unique Identifiers (UUIDs).",
+      'group' => 'UUID',
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    // Initiate the generator. We use the CoreBundle to save repeating the
+    // logic.
+    $container = $this->getMockBuilder('Symfony\Component\DependencyInjection\ContainerBuilder')
+      ->getMock();
+    $class = CoreBundle::registerUuid($container);
+    $this->uuidInstances[] = new $class();
+
+
+    // Add additional uuid implementations when accessible.
+    if (function_exists('uuid_create') && !function_exists('uuid_make')) {
+      $this->uuidInstances[] = new \Drupal\Component\Uuid\Pecl();
+    }
+    elseif (function_exists('com_create_guid')) {
+      $this->uuidInstances[] = new \Drupal\Component\Uuid\Com();
+    }
+
+  }
+
+  /**
+   * Tests generating a UUID.
+   */
+  public function testGenerateUuid() {
+    foreach ($this->uuidInstances as $instance) {
+      $uuid = $instance->generate();
+      $this->assertTrue((bool) $instance->isValid($uuid));
+    }
+  }
+
+  /**
+   * Tests that generated UUIDs are unique.
+   */
+  public function testUuidIsUnique() {
+    foreach ($this->uuidInstances as $instance) {
+      $uuid1 = $instance->generate();
+      $uuid2 = $instance->generate();
+      $this->assertNotEquals($uuid1, $uuid2);
+    }
+  }
+
+  /**
+   * Tests UUID validation.
+   */
+  public function testUuidValidation() {
+    // These valid UUIDs.
+    $uuid_fqdn = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
+    $uuid_min = '00000000-0000-0000-0000-000000000000';
+    $uuid_max = 'ffffffff-ffff-ffff-ffff-ffffffffffff';
+
+    foreach ($this->uuidInstances as $instance) {
+      $this->assertTrue((bool) $instance->isValid($uuid_fqdn));
+      $this->assertTrue((bool) $instance->isValid($uuid_min));
+      $this->assertTrue((bool) $instance->isValid($uuid_max));
+    }
+
+    // These are invalid UUIDs.
+    $invalid_format = '0ab26e6b-f074-4e44-9da-601205fa0e976';
+    $invalid_length = '0ab26e6b-f074-4e44-9daf-1205fa0e9761f';
+
+    foreach ($this->uuidInstances as $instance) {
+      $this->assertFalse((bool) $instance->isValid($invalid_format));
+      $this->assertFalse((bool) $instance->isValid($invalid_length));
+    }
+  }
+}