FEATURE: Implement countReserved, countFailed and countReady

Comply with next major doctrine-common QueueInterface

Author: daniellienert

Classes/Queue/RedisQueue.php

@@ -193,14 +193,41 @@ public function peek($limit = 1)
     /**
      * @inheritdoc
      */
-    public function count()
+    public function count():int
+    {
+        return $this->countReady();
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function countReady(): int
     {
         $this->checkClientConnection();
         return $this->client->lLen("queue:{$this->name}:messages");
     }
 
+    /**
+     * @inheritdoc
+     */
+    public function countReserved(): int
+    {
+        $this->checkClientConnection();
+        return $this->client->lLen("queue:{$this->name}:processing");
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function countFailed(): int
+    {
+        $this->checkClientConnection();
+        return $this->client->lLen("queue:{$this->name}:failed");
+    }
+
     /**
      * @return void
+     * @throws JobQueueException
      */
     public function setUp()
     {
@@ -279,4 +306,4 @@ protected function connectClient()
         }
         return $connected;
     }
-}
+}