Adding the default and slave database connections as services

core/lib/Drupal/Core/DrupalBundle.php

@@ -22,6 +22,7 @@ public function build(ContainerBuilder $container)
         'tags' => array(),
         'references' => array(),
         'methods' => array(),
+        'arguments' => array(),
       );
 
       $references = array();
@@ -31,6 +32,15 @@ public function build(ContainerBuilder $container)
 
       $definition = new Definition($info['class'], $references);
 
+      if (isset($info['factory_class']) && isset($info['factory_method'])) {
+        $definition->setFactoryClass($info['factory_class']);
+        $definition->setFactoryMethod($info['factory_method']);
+      }
+
+      foreach ($info['arguments'] as $argument) {
+        $definition->addArgument($argument);
+      }
+
       foreach($info['tags'] as $tag) {
         $definition->addTag($tag);
       }
@@ -122,6 +132,18 @@ function getDefinitions() {
         'references' => array('exception_controller'),
         'tags' => array('kernel.event_subscriber')
       ),
+      'database' => array(
+        'class' => 'Drupal\Core\Database\Connection',
+        'factory_class' => 'Drupal\Core\Database\Database',
+        'factory_method' => 'getConnection',
+        'arguments' => array('default'),
+      ),
+      'database.slave' => array(
+        'class' => 'Drupal\Core\Database\Connection',
+        'factory_class' => 'Drupal\Core\Database\Database',
+        'factory_method' => 'getConnection',
+        'arguments' => array('slave'),
+      ),
     );
   }