it was created the Creational namespace and append its patterns

Creational/Pool/Processor.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace DesignPatterns\Creational\Pool;
+
+class Processor
+{
+
+    private $pool;
+    private $processing = 0;
+    private $maxProcesses = 3;
+    private $waitingQueue = [];
+
+    public function __construct(Pool $pool)
+    {
+        $this->pool = $pool;
+    }
+
+    public function process($image)
+    {
+        if ($this->processing++ < $this->maxProcesses) {
+            $this->createWorker($image);
+        } else {
+            $this->pushToWaitingQueue($worker);
+        }
+    }
+
+    private function createWorker($image)
+    {
+        $worker = $this->pool->get();
+        $worker->run($image, array($this, 'processDone'));
+    }
+
+    public function processDone($worker)
+    {
+        $this->processing--;
+        $this->pool->dispose($worker);
+
+        if (count($this->waitingQueue) > 0) {
+            $this->createWorker($this->popFromWaitingQueue());
+        }
+    }
+
+    private function pushToWaitingQueue($image)
+    {
+        $this->waitingQueue[] = $image;
+    }
+
+    private function popFromWaitingQueue()
+    {
+        return array_pop($this->waitingQueue);
+    }
+
+}