tweaked cache and session namespacing.

system/session/db.php

@@ -0,0 +1,68 @@
+<?php namespace System\Session;
+
+use System\Config;
+
+class DB implements Driver {
+
+	/**
+	 * Load a session by ID.
+	 *
+	 * @param  string  $id
+	 * @return array
+	 */
+	public function load($id)
+	{
+		$session = $this->table()->find($id);
+
+		if ( ! is_null($session))
+		{
+			return array('id' => $session->id, 'last_activity' => $session->last_activity, 'data' => unserialize($session->data));
+		}
+	}
+
+	/**
+	 * Save a session.
+	 *
+	 * @param  array  $session
+	 * @return void
+	 */
+	public function save($session)
+	{
+		$this->delete($session['id']);
+
+		$this->table()->insert(array('id' => $session['id'], 'last_activity' => $session['last_activity'], 'data' => serialize($session['data'])));
+	}
+
+	/**
+	 * Delete a session by ID.
+	 *
+	 * @param  string  $id
+	 * @return void
+	 */
+	public function delete($id)
+	{
+		$this->table()->delete($id);
+	}
+
+	/**
+	 * Delete all expired sessions.
+	 *
+	 * @param  int   $expiration
+	 * @return void
+	 */
+	public function sweep($expiration)
+	{
+		$this->table()->where('last_activity', '<', $expiration)->delete();
+	}
+
+	/**
+	 * Get a session database query.
+	 *
+	 * @return Query
+	 */
+	private function table()
+	{
+		return \System\DB::table(Config::get('session.table'));		
+	}
+	
+}