diff --git a/Westdc/Metadata/Metadata.php b/Westdc/Metadata/Metadata.php
index eb57df6..8f3a9e5 100644
--- a/Westdc/Metadata/Metadata.php
+++ b/Westdc/Metadata/Metadata.php
@@ -10,10 +10,40 @@ namespace Westdc\Metadata;
 
 use Zend\ServiceManager\ServiceManager;
 use Zend\ServiceManager\ServiceManagerAwareInterface;
+use Westdc\EventModel\AbstractEventManager;
+
+class Metadata extends AbstractEventManager implements ServiceManagerAwareInterface{
+
+    protected $serviceManager;
+
+    private $db;
+
+    public function setServiceManager(ServiceManager $serviceManager)
+    {
+        $this->serviceManager = $serviceManager;
+
+        $this->init();
+
+        return $this;
+    }
+
+    private function init()
+    {
+        $dbService = $this->serviceManager->get('Db');
+        $this->db = $dbService->getPdo();
+    }
 
 
-class Metadata implements ServiceManagerAwareInterface{
 
+    public function delete($uuid)
+    {
 
+        $tools = $this->serviceManager->get('Tools');
+
+        if( false == $tools->isUUID($uuid) )
+            return "参数错误";
+
+        return true;
+    }//delete 删除元数据
 
 } 
\ No newline at end of file
diff --git a/Westdc/Service/ServiceFactory.php b/Westdc/Service/ServiceFactory.php
index ba8633a..3f5ed3b 100644
--- a/Westdc/Service/ServiceFactory.php
+++ b/Westdc/Service/ServiceFactory.php
@@ -12,8 +12,31 @@ use Zend\ServiceManager\AbstractFactoryInterface;
 
 class ServiceFactory implements AbstractFactoryInterface{
 
+    private $invokedService;
+    private $invokedNames;
+    private $currentServiceType;
+
+    function __construct()
+    {
+        $this->invokedService = $this->getInvokedServiceFromConfig();
+        $this->invokedNames = array_keys($this->invokedService);
+    }
+
+    private function getInvokedServiceFromConfig()
+    {
+        return include dirname(__FILE__) . "/service.lazy.config.php";
+    }
+
     public function canCreateServiceWithName(ServiceLocatorInterface $serviceLocator, $name, $requestedName)
     {
+        if(!is_array($this->invokedService))
+            throw new \RuntimeException('lazy services not found');
+
+        if(in_array($requestedName , $this->invokedNames))
+        {
+            $this->currentServiceType = "lazy";
+            return true;
+        }
 
         $serviceAgentDir = __DIR__ . "/ServiceAgent";
 
@@ -24,6 +47,7 @@ class ServiceFactory implements AbstractFactoryInterface{
                 while(false !== ($file = readdir($handle)))
                 {
                     if(substr($file,0,strlen($file)-4) == (string)$requestedName) {
+                        $this->currentServiceType = "agent";
                         return true;
                     }
                 }
@@ -36,13 +60,30 @@ class ServiceFactory implements AbstractFactoryInterface{
 
     public function createServiceWithName(ServiceLocatorInterface $serviceLocator, $name, $requestedName)
     {
-        $serviceName = __NAMESPACE__ . "\\ServiceAgent\\" . $requestedName;
+        switch($this->currentServiceType)
+        {
+            case 'lazy':
+                $service = new $this->invokedService[$requestedName];
 
-        $service = new $serviceName;
+                $service->WESTDC_SERVICE_TYPE = "lazy";
+                $service->WESTDC_SERVICE_NAME = $requestedName;
 
-        $service->name = $requestedName;
+                return $service;
+
+            case 'agent':
+                $serviceName = __NAMESPACE__ . "\\ServiceAgent\\" . $requestedName;
+
+                $service = new $serviceName;
+
+                $service->WESTDC_SERVICE_TYPE = "agent";
+                $service->WESTDC_SERVICE_NAME = $requestedName;
+
+                return $service;
+
+        }
 
-        return $service;
     }
 
+
+
 } 
\ No newline at end of file
diff --git a/Westdc/Service/service.lazy.config.php b/Westdc/Service/service.lazy.config.php
new file mode 100644
index 0000000..7fce29b
--- /dev/null
+++ b/Westdc/Service/service.lazy.config.php
@@ -0,0 +1,4 @@
+<?php
+return array(
+    'Tools' => 'Westdc\Helpers\Tools'
+);
\ No newline at end of file