diff --git a/README.md b/README.md
index 2a042d9..3f2d90b 100644
--- a/README.md
+++ b/README.md
@@ -1,58 +1,2 @@
 # cache-php
 Cache tools for PHP applications
-
-### Memory
-
-Extends [PHP memcached](https://www.php.net/manual/en/book.memcached.php)
-
-#### Init
-
-```
-$memory = new \Yggverse\Cache\Memory(
-
-  'localhost',  // memcached server host, localhost by default
-  11211,        // memcached server port, 11211 by default
-
-  'my_app',     // application namespace
-  3600 + time() // cache time by default
-);
-```
-
-#### Supported methods
-
-##### Memory::set
-
-##### Memory::delete
-
-##### Memory::flush
-
-##### Memory::get
-
-##### Memory::getByValueCallback
-
-Return cached or cache new value of plain value callback
-
-```
-  $value = $memory->getByValueCallback(
-    'key_name',    // string, unique key name
-    'value',       // mixed, plain value
-    3600 + time(), // optional, cache timeout for this value
-  );
-```
-
-##### Memory::getByMethodCallback
-
-Return cached or cache new value of object method callback
-
-```
-  $value = $memory->getByMethodCallback(
-    $class_object,         // object of method class
-    'method_name',         // object method name
-    [
-      $method_attribute_1, // optional, array of attributes callback method requires
-      $method_attribute_2,
-      ...
-    ]
-    3600 + time(),         // optional, cache timeout for this value
-  );
-```
\ No newline at end of file
diff --git a/src/Memory.php b/src/Memory.php
index 3bc6858..b2ce747 100644
--- a/src/Memory.php
+++ b/src/Memory.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Yggverse\Cache;
+namespace YGGverse\Cache;
 
 class Memory {
 
@@ -19,58 +19,11 @@ class Memory {
     $this->_timeout   = $timeout;
   }
 
-  public function get(mixed $key) : mixed
+  public function get(string $key, mixed $value = null, int $timeout = null) : mixed
   {
-    $key = $this->_setKey(
-      [
-        $this->_namespace,
-        $key
-      ]
-    );
-
-    return $this->_memcached->get($key);
-  }
-
-  public function set(mixed $key, mixed $value = null, int $timeout = null) : bool
-  {
-    $key = $this->_setKey(
-      [
-        $this->_namespace,
-        $key
-      ]
-    );
-
-    return $this->_memcached->set($key, $value, ($timeout ? $timeout : $this->_timeout));
-  }
-
-  public function delete(mixed $key) : bool
-  {
-    $key = $this->_setKey(
-      [
-        $this->_namespace,
-        $key
-      ]
-    );
-
-    return $this->_memcached->delete($key);
-  }
-
-  public function getByValueCallback(mixed $key, mixed $value = null, int $timeout = null) : mixed
-  {
-    $key = $this->_setKey(
-      [
-        $this->_namespace,
-        $key
-      ]
-    );
-
-    if (false !== $value = $this->_memcached->get($key))
+    if (false === $result = $this->_memcached->get($this->_key($key)))
     {
-      return $value;
-    }
-    else
-    {
-      if (true === $this->_memcached->set($key, $value, ($timeout ? $timeout : $this->_timeout)))
+      if (true === $this->set($key, $value, $timeout))
       {
         return $value;
       }
@@ -79,55 +32,29 @@ class Memory {
         return false;
       }
     }
-  }
-
-  public function getByMethodCallback(object $object, string $method, array $arguments = [], int $timeout = null) : mixed
-  {
-    $key = $this->_setKey(
-      [
-        $this->_namespace,
-        $object,
-        $method,
-        $arguments
-      ]
-    );
-
-    if (false !== $value = $this->_memcached->get($key))
-    {
-      return $value;
-    }
     else
     {
-      $value = call_user_func_array(
-        [
-          $object,
-          $method
-        ],
-        $arguments
-      );
-
-      if (true === $this->_memcached->set($key, $value, ($timeout ? $timeout : $this->_timeout)))
-      {
-        return $value;
-      }
-      else
-      {
-        return false;
-      }
+      return $result;
     }
   }
 
-  public function flush(?int $delay = 0) : bool
+  public function set(string $key, mixed $value, int $timeout = null)
   {
-    return $this->_memcached->flush(
-      $delay
-    );
+    return $this->_memcached->set($this->_key($key), $value, ($timeout ? $timeout : $this->_timeout) + time());
   }
 
-  private function _setKey(mixed $key) : string
+  public function delete(string $key) : bool
   {
-    return md5(
-      json_encode($key)
-    );
+    return $this->_memcached->delete($this->_key($key));
+  }
+
+  public function flush(int $delay = 60)
+  {
+    return $this->_memcached->flush();
+  }
+
+  private function _key(string $key) : string
+  {
+    return sprintf('%s.%s', $this->_namespace, $key);
   }
 }
\ No newline at end of file