added special DeviceDetectorCache class used for caching DeviceDetector. This cache combines file and static caching to speed up detections as much as possible

1 files changed, 65 insertions, 0 deletions

diff --git a/core/DeviceDetectorCache.php b/core/DeviceDetectorCache.php
new file mode 100644
index 0000000000..744560df92
--- /dev/null
+++ b/core/DeviceDetectorCache.php
@@ -0,0 +1,65 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik;
+
+use Exception;
+
+/**
+ * Caching class used for DeviceDetector caching
+ *
+ * Combines Piwik\CacheFile with an additional caching in static property
+ *
+ * Static caching speeds up multiple detections in one request, which is mostly the case when importing logs
+ */
+class DeviceDetectorCache extends CacheFile implements \DeviceDetector\Cache\CacheInterface
+{
+    protected static $staticCache = array();
+
+    /**
+     * Function to fetch a cache entry
+     *
+     * @param string $id The cache entry ID
+     * @return array|bool  False on error, or array the cache content
+     */
+    public function get($id)
+    {
+        if (empty($id)) {
+            return false;
+        }
+        $id = $this->cleanupId($id);
+
+        if (array_key_exists($id, self::$staticCache)) {
+            return self::$staticCache[$id];
+        }
+
+        return parent::get($id);
+    }
+
+
+    /**
+     * A function to store content a cache entry.
+     *
+     * @param string $id The cache entry ID
+     * @param array $content The cache content
+     * @throws \Exception
+     * @return bool  True if the entry was succesfully stored
+     */
+    public function set($id, $content)
+    {
+        if (empty($id)) {
+            return false;
+        }
+
+        $id = $this->cleanupId($id);
+
+        self::$staticCache[$id] = $content;
+
+        return parent::set($id, $content);
+    }
+}