symfony · Nyholm · Dec 28, 2016 · Dec 28, 2016 · Dec 28, 2016 · Dec 28, 2016
diff --git a/src/Symfony/Component/Cache/Adapter/TraceableAdapter.php b/src/Symfony/Component/Cache/Adapter/TraceableAdapter.php
@@ -0,0 +1,208 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Cache\Adapter;
+
+use Psr\Cache\CacheItemInterface;
+
+/**
+ * An adapter that collects data about all cache calls.
+ *
+ * @author Aaron Scherer <aequasi@gmail.com>
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class TraceableAdapter implements AdapterInterface
+{
+    private $pool;
+    private $calls = array();
+
+    public function __construct(AdapterInterface $pool)
+    {
+        $this->pool = $pool;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getItem($key)
+    {
+        $event = $this->start(__FUNCTION__, $key);
+        try {
+            $item = $this->pool->getItem($key);
+        } finally {
+            $event->end = microtime(true);
+        }
+        if ($item->isHit()) {
+            ++$event->hits;
+        } else {
+            ++$event->misses;
+        }
+        $event->result = $item->get();
+
+        return $item;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function hasItem($key)
+    {
+        $event = $this->start(__FUNCTION__, $key);
+        try {
+            $event->result = $this->pool->hasItem($key);
+        } finally {
+            $event->end = microtime(true);
+        }
+
+        if ($event->result) {
+            ++$event->hits;
+        } else {
+            ++$event->misses;
+        }
+
+        return $event->result;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function deleteItem($key)
+    {
+        $event = $this->start(__FUNCTION__, $key);
+        try {
+            return $event->result = $this->pool->deleteItem($key);
+        } finally {
+            $event->end = microtime(true);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function save(CacheItemInterface $item)
+    {
+        $event = $this->start(__FUNCTION__, $item);
+        try {
+            return $event->result = $this->pool->save($item);
+        } finally {
+            $event->end = microtime(true);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function saveDeferred(CacheItemInterface $item)
+    {
+        $event = $this->start(__FUNCTION__, $item);
+        try {
+            return $event->result = $this->pool->saveDeferred($item);
+        } finally {
+            $event->end = microtime(true);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getItems(array $keys = array())
+    {
+        $event = $this->start(__FUNCTION__, $keys);
+        try {
+            $result = $this->pool->getItems($keys);
+        } finally {
+            $event->end = microtime(true);
+        }
+        $f = function () use ($result, $event) {
+            $event->result = array();
+            foreach ($result as $key => $item) {
+                if ($item->isHit()) {
+                    ++$event->hits;
+                } else {
+                    ++$event->misses;
+                }
+                $event->result[$key] = $item->get();
+                yield $key => $item;
+            }
+        };
+
+        return $f();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function clear()
+    {
+        $event = $this->start(__FUNCTION__);
+        try {
+            return $event->result = $this->pool->clear();
+        } finally {
+            $event->end = microtime(true);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function deleteItems(array $keys)
+    {
+        $event = $this->start(__FUNCTION__, $keys);
+        try {
+            return $event->result = $this->pool->deleteItems($keys);
+        } finally {
+            $event->end = microtime(true);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function commit()
+    {
+        $event = $this->start(__FUNCTION__);
+        try {
+            return $event->result = $this->pool->commit();
+        } finally {
+            $event->end = microtime(true);
+        }
+    }
+
+    public function getCalls()
+    {
+        return $this->calls;
+    }
+
+    private function start($name, $argument = null)
+    {
+        $this->calls[] = $event = new TraceableAdapterEvent();
+        $event->name = $name;
+        $event->argument = $argument;
+        $event->start = microtime(true);
+
+        return $event;
+    }
+}
+
+/**
+ * @internal
+ */
+class TraceableAdapterEvent
+{
+    public $name;
+    public $argument;
+    public $start;
+    public $end;
+    public $result;
+    public $hits = 0;
+    public $misses = 0;
+}