Added more docblocks to Cache adapters

Author: frankdejonge

src/Flysystem/Cache/Memcached.php

@@ -12,7 +12,7 @@ class Memcached extends AbstractCache
     protected $key;
 
     /**
-     * @var  int|null  $expire  expiration time
+     * @var  int|null  $expire  seconds until cache expiration
      */
     protected $expire;
 
@@ -26,7 +26,7 @@ class Memcached extends AbstractCache
      *
      * @param   \Memcached  $memcached
      * @param   string      $key        storage key
-     * @param   int|null    $expire     expire time
+     * @param   int|null    $expire     seconds until cache expiration
      */
     public function __construct(NativeMemcached $memcached, $key = 'flysystem', $expire = null)
     {

src/Flysystem/Cache/Memory.php

@@ -4,20 +4,19 @@
 
 class Memory extends AbstractCache
 {
+    /**
+     * {@inheritdoc}
+     */
     public function save()
     {
         // There is nothing to save
     }
 
+    /**
+     * {@inheritdoc}
+     */
     public function load()
     {
         // There is nothing to load
     }
-
-    public function flush()
-    {
-        clearstatcache();
-
-        parent::flush();
-    }
 }

src/Flysystem/Cache/Predis.php

@@ -24,9 +24,9 @@ class Predis extends Memory
     /**
      * Constructor
      *
-     * @param \Predis\Client $client predis client
-     * @param string         $key    storage key
-     * @param int|null       $expire seconds until cache expiration
+     * @param \Predis\Client  $client  predis client
+     * @param string          $key     storage key
+     * @param int|null        $expire  seconds until cache expiration
      */
     public function __construct(Client $client = null, $key = 'flysystem', $expire = null)
     {
@@ -35,6 +35,9 @@ public function __construct(Client $client = null, $key = 'flysystem', $expire =
         $this->expire = $expire;
     }
 
+    /**
+     * {@inheritdoc}
+     */
     public function load()
     {
         $contents = $this->client->get($this->key);
@@ -44,6 +47,9 @@ public function load()
         }
     }
 
+    /**
+     * {@inheritdoc}
+     */
     public function save()
     {
         $contents = $this->getForStorage();