comparison vendor/doctrine/cache/lib/Doctrine/Common/Cache/ChainCache.php @ 0:4c8ae668cc8c

Initial import (non-working)

+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\Common\Cache;
+
+/**
+ * Cache provider that allows to easily chain multiple cache providers
+ *
+ * @author Michaël Gallego <[e-mail]>
+ */
+class ChainCache extends CacheProvider
+{
+    /**
+     * @var CacheProvider[]
+     */
+    private $cacheProviders = array();
+
+    /**
+     * Constructor
+     *
+     * @param CacheProvider[] $cacheProviders
+     */
+    public function __construct($cacheProviders = array())
+    {
+        $this->cacheProviders = $cacheProviders;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function setNamespace($namespace)
+    {
+        parent::setNamespace($namespace);
+
+        foreach ($this->cacheProviders as $cacheProvider) {
+            $cacheProvider->setNamespace($namespace);
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    protected function doFetch($id)
+    {
+        foreach ($this->cacheProviders as $key => $cacheProvider) {
+            if ($cacheProvider->doContains($id)) {
+                $value = $cacheProvider->doFetch($id);
+
+                // We populate all the previous cache layers (that are assumed to be faster)
+                for ($subKey = $key - 1 ; $subKey >= 0 ; $subKey--) {
+                    $this->cacheProviders[$subKey]->doSave($id, $value);
+                }
+
+                return $value;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    protected function doContains($id)
+    {
+        foreach ($this->cacheProviders as $cacheProvider) {
+            if ($cacheProvider->doContains($id)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    protected function doSave($id, $data, $lifeTime = 0)
+    {
+        $stored = true;
+
+        foreach ($this->cacheProviders as $cacheProvider) {
+            $stored = $cacheProvider->doSave($id, $data, $lifeTime) && $stored;
+        }
+
+        return $stored;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    protected function doDelete($id)
+    {
+        $deleted = true;
+
+        foreach ($this->cacheProviders as $cacheProvider) {
+            $deleted = $cacheProvider->doDelete($id) && $deleted;
+        }
+
+        return $deleted;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    protected function doFlush()
+    {
+        $flushed = true;
+
+        foreach ($this->cacheProviders as $cacheProvider) {
+            $flushed = $cacheProvider->doFlush() && $flushed;
+        }
+
+        return $flushed;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    protected function doGetStats()
+    {
+        // We return all the stats from all adapters
+        $stats = array();
+
+        foreach ($this->cacheProviders as $cacheProvider) {
+            $stats[] = $cacheProvider->doGetStats();
+        }
+
+        return $stats;
+    }
+}