set a customer connection resolver using a static setter

src/Illuminate/Database/Connection.php

@@ -136,6 +136,13 @@ class Connection implements ConnectionInterface
      */
     protected $doctrineConnection;
 
+    /**
+     * The connection resolvers.
+     *
+     * @var array
+     */
+    protected static $resolvers = [];
+
     /**
      * Create a new database connection instance.
      *
@@ -937,6 +944,30 @@ public function setReconnector(callable $reconnector)
         return $this;
     }
 
+    /**
+     * Register a connection resolver.
+     *
+     * @param  string  $driver
+     * @param  \Closure  $callback
+     * @return void
+     */
+    public static function resolveConnection($driver, Closure $callback)
+    {
+        static::$resolvers[$driver] = $callback;
+    }
+
+    /**
+     * Get the connection resolver for the given driver.
+     *
+     * @param  string  $driver
+     * @return mixed
+     */
+    public static function getResolver($driver)
+    {
+        return isset(static::$resolvers[$driver]) ?
+                     static::$resolvers[$driver] : null;
+    }
+
     /**
      * Get the database connection name.
      *

src/Illuminate/Database/Connectors/ConnectionFactory.php

@@ -5,6 +5,7 @@
 use PDOException;
 use Illuminate\Support\Arr;
 use InvalidArgumentException;
+use Illuminate\Database\Connection;
 use Illuminate\Database\MySqlConnection;
 use Illuminate\Database\SQLiteConnection;
 use Illuminate\Database\PostgresConnection;
@@ -267,8 +268,8 @@ public function createConnector(array $config)
      */
     protected function createConnection($driver, $connection, $database, $prefix = '', array $config = [])
     {
-        if ($this->container->bound($key = "db.connection.{$driver}")) {
-            return $this->container->make($key, [$connection, $database, $prefix, $config]);
+        if ($resolver = Connection::getResolver($driver)) {
+            return $resolver($connection, $database, $prefix, $config);
         }
 
         switch ($driver) {