Added simple-cache dependency. Added Decorator implementation (v1).

Author: ndobromirov

PrefixedSimpleCache.php

@@ -0,0 +1,145 @@
+<?php
+
+/*
+ * This file is part of php-cache organization.
+ *
+ * (c) 2015 Aaron Scherer <aequasi@gmail.com>, Tobias Nyholm <tobias.nyholm@gmail.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace Cache\Prefixed;
+
+use Psr\SimpleCache\CacheInterface;
+
+/**
+ * PrefixedSimpleCache.
+ *
+ * Prefixes all cache keys with a string.
+ *
+ * @author ndobromirov
+ */
+class PrefixedSimpleCache implements CacheInterface
+{
+    /**
+     * @type CacheInterface
+     */
+    private $cache;
+
+    /**
+     * @type string
+     */
+    private $prefix;
+
+    /**
+     * @param CacheInterface $simpleCache
+     * @param string         $prefix
+     */
+    public function __construct(CacheInterface $simpleCache, $prefix)
+    {
+        $this->cache  = $simpleCache;
+        $this->prefix = $prefix;
+    }
+
+    /**
+     * Add namespace prefix on the key.
+     *
+     * @param array $keys
+     */
+    private function prefixValue(&$key)
+    {
+        $key = $this->prefix.$key;
+    }
+
+    /**
+     * @param array $keys
+     */
+    private function prefixValues(array &$keys)
+    {
+        foreach ($keys as &$key) {
+            $this->prefixValue($key);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function clear()
+    {
+        $this->cache->clear();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function delete($key)
+    {
+        $this->prefixValue($key);
+
+        return $this->cache->delete($key);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function deleteMultiple($keys)
+    {
+        $this->prefixValues($keys);
+
+        return $this->cache->deleteMultiple($keys);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function get($key, $default = null)
+    {
+        $this->prefixValue($key);
+
+        return $this->cache->get($key, $default);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getMultiple($keys, $default = null)
+    {
+        $this->prefixValues($keys);
+
+        return $this->cache->getMultiple($keys, $default);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function has($key)
+    {
+        $this->prefixValue($key);
+
+        return $this->cache->has($key);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function set($key, $value, $ttl = null)
+    {
+        $this->prefixValue($key);
+
+        return $this->set($key, $value, $ttl);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setMultiple($values, $ttl = null)
+    {
+        $keys = array_keys($values);
+        $this->prefixValues($keys);
+
+        $values = array_combine($keys, array_values($values));
+
+        return $this->cache->setMultiple($values, $ttl);
+    }
+}

composer.json

@@ -20,6 +20,7 @@
     "require":           {
         "php":                      "^5.6 || ^7.0",
         "psr/cache":                "^1.0",
+        "psr/simple-cache":         "^1.0",
         "cache/hierarchical-cache": "^0.4"
     },
     "require-dev":       {