改进Cache类 及 驱动 改进Connection类及驱动

library/think/cache/driver/Memcache.php

@@ -14,7 +14,7 @@ namespace think\cache\driver;
 use think\Cache;
 use think\Exception;
 
-class Memcache implements CacheInterface
+class Memcache
 {
     protected $handler = null;
     protected $options = [
@@ -65,7 +65,6 @@ class Memcache implements CacheInterface
      */
     public function get($name)
     {
-        Cache::$readTimes++;
         return $this->handler->get($this->options['prefix'] . $name);
     }
 
@@ -79,30 +78,11 @@ class Memcache implements CacheInterface
      */
     public function set($name, $value, $expire = null)
     {
-        Cache::$writeTimes++;
         if (is_null($expire)) {
             $expire = $this->options['expire'];
         }
         $name = $this->options['prefix'] . $name;
         if ($this->handler->set($name, $value, 0, $expire)) {
-            if ($this->options['length'] > 0) {
-                // 记录缓存队列
-                $queue = $this->handler->get('__info__');
-                if (!$queue) {
-                    $queue = [];
-                }
-                if (false === array_search($name, $queue)) {
-                    array_push($queue, $name);
-                }
-
-                if (count($queue) > $this->options['length']) {
-                    // 出列
-                    $key = array_shift($queue);
-                    // 删除缓存
-                    $this->handler->delete($key);
-                }
-                $this->handler->set('__info__', $queue);
-            }
             return true;
         }
         return false;