git-svn-id: http://78.47.251.156/svn/dev/sterntours-3@3283 f459cee4-fb09-11de-96c3-f9c5f16c3c76

trunk/src/AppBundle/RedisClassLoader.php

@@ -0,0 +1,118 @@
+<?php
+/**
+ * @author Ulrich Hecht <ulrich.hecht@hecht-software.de>
+ * @date 12/01/2016
+ */
+
+namespace AppBundle;
+
+
+class RedisClassLoader
+{
+    private $prefix;
+
+    /**
+     * A class loader object that implements the findFile() method.
+     *
+     * @var object
+     */
+    private $decorated;
+
+    /**
+     * @var null|\Redis
+     */
+    private $redis = null;
+
+    /**
+     * Constructor.
+     *
+     * @param string $prefix    The XCache namespace prefix to use
+     * @param object $decorated A class loader object that implements the findFile() method
+     *
+     * @throws \RuntimeException
+     * @throws \InvalidArgumentException
+     */
+    public function __construct($prefix, $decorated)
+    {
+        if (extension_loaded('redis')) {
+            $this->redis = new \Redis();
+            $this->redis->connect('127.0.0.1');
+        }
+
+        if (!method_exists($decorated, 'findFile')) {
+            throw new \InvalidArgumentException('The class finder must implement a "findFile" method.');
+        }
+
+        $this->prefix = $prefix;
+        $this->decorated = $decorated;
+    }
+
+    /**
+     * Registers this instance as an autoloader.
+     *
+     * @param bool $prepend Whether to prepend the autoloader or not
+     */
+    public function register($prepend = false)
+    {
+        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
+    }
+
+    /**
+     * Unregisters this instance as an autoloader.
+     */
+    public function unregister()
+    {
+        spl_autoload_unregister(array($this, 'loadClass'));
+    }
+
+    /**
+     * Loads the given class or interface.
+     *
+     * @param string $class The name of the class
+     *
+     * @return bool|null True, if loaded
+     */
+    public function loadClass($class)
+    {
+        if ($file = $this->findFile($class)) {
+            require $file;
+
+            return true;
+        }
+    }
+
+    /**
+     * Finds a file by class name while caching lookups to Xcache.
+     *
+     * @param string $class A class name to resolve to file
+     *
+     * @return string|null
+     */
+    public function findFile($class)
+    {
+        if ($this->redis === null)
+        {
+            return $this->decorated->findFile($class) ?: null;
+        }
+
+        if ($this->redis->exists($this->prefix.$class))
+        {
+            $file = $this->redis->get($this->prefix.$class);
+        }
+        else
+        {
+            $file = $this->decorated->findFile($class) ?: null;
+            $this->redis->set($this->prefix.$class, $file);
+        }
+
+        return $file;
+    }
+
+    /**
+     * Passes through all unknown calls onto the decorated object.
+     */
+    public function __call($method, $args)
+    {
+        return call_user_func_array(array($this->decorated, $method), $args);
+    }
+}