ZF-10560: added Zend_Cache_Backend_Libmemcached

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@23136 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Cache.php

@@ -40,7 +40,7 @@ abstract class Zend_Cache
      *
      * @var array
      */
-    public static $standardBackends = array('File', 'Sqlite', 'Memcached', 'Apc', 'ZendPlatform',
+    public static $standardBackends = array('File', 'Sqlite', 'Memcached', 'Libmemcached', 'Apc', 'ZendPlatform',
                                             'Xcache', 'TwoLevels', 'ZendServer_Disk', 'ZendServer_ShMem');
 
     /**
@@ -48,7 +48,7 @@ abstract class Zend_Cache
      *
      * @var array
      */
-    public static $standardExtendedBackends = array('File', 'Apc', 'TwoLevels', 'Memcached', 'Sqlite');
+    public static $standardExtendedBackends = array('File', 'Apc', 'TwoLevels', 'Memcached', 'Libmemcached', 'Sqlite');
 
     /**
      * Only for backward compatibility (may be removed in next major release)
@@ -64,7 +64,7 @@ abstract class Zend_Cache
      * @var array
      * @deprecated
      */
-    public static $availableBackends = array('File', 'Sqlite', 'Memcached', 'Apc', 'ZendPlatform', 'Xcache', 'TwoLevels');
+    public static $availableBackends = array('File', 'Sqlite', 'Memcached', 'Libmemcached', 'Apc', 'ZendPlatform', 'Xcache', 'TwoLevels');
 
     /**
      * Consts for clean() method

library/Zend/Cache/Backend/Libmemcached.php

@@ -0,0 +1,479 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Cache
+ * @subpackage Zend_Cache_Backend
+ * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+
+
+/**
+ * @see Zend_Cache_Backend_Interface
+ */
+require_once 'Zend/Cache/Backend/ExtendedInterface.php';
+
+/**
+ * @see Zend_Cache_Backend
+ */
+require_once 'Zend/Cache/Backend.php';
+
+
+/**
+ * @package    Zend_Cache
+ * @subpackage Zend_Cache_Backend
+ * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Cache_Backend_Libmemcached extends Zend_Cache_Backend implements Zend_Cache_Backend_ExtendedInterface
+{
+    /**
+     * Default Server Values
+     */
+    const DEFAULT_HOST = '127.0.0.1';
+    const DEFAULT_PORT =  11211;
+    const DEFAULT_WEIGHT  = 1;
+
+    /**
+     * Log message
+     */
+    const TAGS_UNSUPPORTED_BY_CLEAN_OF_LIBMEMCACHED_BACKEND = 'Zend_Cache_Backend_Libmemcached::clean() : tags are unsupported by the Libmemcached backend';
+    const TAGS_UNSUPPORTED_BY_SAVE_OF_LIBMEMCACHED_BACKEND =  'Zend_Cache_Backend_Libmemcached::save() : tags are unsupported by the Libmemcached backend';
+
+    /**
+     * Available options
+     *
+     * =====> (array) servers :
+     * an array of memcached server ; each memcached server is described by an associative array :
+     * 'host' => (string) : the name of the memcached server
+     * 'port' => (int) : the port of the memcached server
+     * 'weight' => (int) : number of buckets to create for this server which in turn control its
+     *                     probability of it being selected. The probability is relative to the total
+     *                     weight of all servers.
+     * =====> (array) client :
+     * an array of memcached client options ; the memcached client is described by an associative array :
+     * @see http://php.net/manual/memcached.constants.php
+     * - The option name can be the name of the constant without the prefix 'OPT_'
+     *   or the integer value of this option constant
+     *
+     * @var array available options
+     */
+    protected $_options = array(
+        'servers' => array(array(
+            'host'   => self::DEFAULT_HOST,
+            'port'   => self::DEFAULT_PORT,
+            'weight' => self::DEFAULT_WEIGHT,
+        )),
+        'client' => array()
+    );
+
+    /**
+     * Memcached object
+     *
+     * @var mixed memcached object
+     */
+    protected $_memcache = null;
+
+    /**
+     * Constructor
+     *
+     * @param array $options associative array of options
+     * @throws Zend_Cache_Exception
+     * @return void
+     */
+    public function __construct(array $options = array())
+    {
+        if (!extension_loaded('memcached')) {
+            Zend_Cache::throwException('The memcached extension must be loaded for using this backend !');
+        }
+
+        // override default client options
+        $this->_options['client'] = array(
+            Memcached::OPT_DISTRIBUTION         => Memcached::DISTRIBUTION_CONSISTENT,
+            Memcached::OPT_HASH                 => Memcached::HASH_MD5,
+            Memcached::OPT_LIBKETAMA_COMPATIBLE => true,
+        );
+
+        parent::__construct($options);
+
+        if (isset($this->_options['servers'])) {
+            $value = $this->_options['servers'];
+            if (isset($value['host'])) {
+                // in this case, $value seems to be a simple associative array (one server only)
+                $value = array(0 => $value); // let's transform it into a classical array of associative arrays
+            }
+            $this->setOption('servers', $value);
+        }
+        $this->_memcache = new Memcached;
+
+        // setup memcached client options
+        foreach ($this->_options['client'] as $name => $value) {
+            $optId = null;
+            if (is_int($name)) {
+                $optId = $name;
+            } else {
+                $optConst = 'Memcached::OPT_' . strtoupper($name);
+                if (defined($optName)) {
+                    $optId = constant($optConst);
+                }
+            }
+            if ($optId) {
+                $this->_memcache->setOption($optId, $value);
+            }
+        }
+
+        // setup memcached servers
+        $servers = array();
+        foreach ($this->_options['servers'] as $server) {
+            if (!array_key_exists('port', $server)) {
+                $server['port'] = self::DEFAULT_PORT;
+            }
+            if (!array_key_exists('weight', $server)) {
+                $server['weight'] = self::DEFAULT_WEIGHT;
+            }
+
+            $servers[] = array($server['host'], $server['port'], $server['weight']);
+        }
+        $this->_memcache->addServers($servers);
+    }
+
+    /**
+     * Test if a cache is available for the given id and (if yes) return it (false else)
+     *
+     * @param  string  $id                     Cache id
+     * @param  boolean $doNotTestCacheValidity If set to true, the cache validity won't be tested
+     * @return string|false cached datas
+     */
+    public function load($id, $doNotTestCacheValidity = false)
+    {
+        $tmp = $this->_memcache->get($id);
+        if (isset($tmp[0])) {
+            return $tmp[0];
+        }
+        return false;
+    }
+
+    /**
+     * Test if a cache is available or not (for the given id)
+     *
+     * @param  string $id Cache id
+     * @return int|false (a cache is not available) or "last modified" timestamp (int) of the available cache record
+     */
+    public function test($id)
+    {
+        $tmp = $this->_memcache->get($id);
+        if (isset($tmp[0], $tmp[1])) {
+            return (int)$tmp[1];
+        }
+        return false;
+    }
+
+    /**
+     * Save some string datas into a cache record
+     *
+     * Note : $data is always "string" (serialization is done by the
+     * core not by the backend)
+     *
+     * @param  string $data             Datas to cache
+     * @param  string $id               Cache id
+     * @param  array  $tags             Array of strings, the cache record will be tagged by each string entry
+     * @param  int    $specificLifetime If != false, set a specific lifetime for this cache record (null => infinite lifetime)
+     * @return boolean True if no problem
+     */
+    public function save($data, $id, $tags = array(), $specificLifetime = false)
+    {
+        $lifetime = $this->getLifetime($specificLifetime);
+
+        // ZF-8856: using set because add needs a second request if item already exists
+        $result = @$this->_memcache->set($id, array($data, time(), $lifetime), $lifetime);
+        if ($result === false) {
+            $rsCode = $this->_memcache->getResultCode();
+            $rsMsg  = $this->_memcache->getResultMessage();
+            $this->_log("Memcached::set() failed: [{$rsCode}] {$rsMsg}");
+        }
+
+        if (count($tags) > 0) {
+            $this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_LIBMEMCACHED_BACKEND);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Remove a cache record
+     *
+     * @param  string $id Cache id
+     * @return boolean True if no problem
+     */
+    public function remove($id)
+    {
+        return $this->_memcache->delete($id);
+    }
+
+    /**
+     * Clean some cache records
+     *
+     * Available modes are :
+     * 'all' (default)  => remove all cache entries ($tags is not used)
+     * 'old'            => unsupported
+     * 'matchingTag'    => unsupported
+     * 'notMatchingTag' => unsupported
+     * 'matchingAnyTag' => unsupported
+     *
+     * @param  string $mode Clean mode
+     * @param  array  $tags Array of tags
+     * @throws Zend_Cache_Exception
+     * @return boolean True if no problem
+     */
+    public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
+    {
+        switch ($mode) {
+            case Zend_Cache::CLEANING_MODE_ALL:
+                return $this->_memcache->flush();
+                break;
+            case Zend_Cache::CLEANING_MODE_OLD:
+                $this->_log("Zend_Cache_Backend_Libmemcached::clean() : CLEANING_MODE_OLD is unsupported by the Libmemcached backend");
+                break;
+            case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
+            case Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG:
+            case Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG:
+                $this->_log(self::TAGS_UNSUPPORTED_BY_CLEAN_OF_LIBMEMCACHED_BACKEND);
+                break;
+               default:
+                Zend_Cache::throwException('Invalid mode for clean() method');
+                   break;
+        }
+    }
+
+    /**
+     * Return true if the automatic cleaning is available for the backend
+     *
+     * @return boolean
+     */
+    public function isAutomaticCleaningAvailable()
+    {
+        return false;
+    }
+
+    /**
+     * Set the frontend directives
+     *
+     * @param  array $directives Assoc of directives
+     * @throws Zend_Cache_Exception
+     * @return void
+     */
+    public function setDirectives($directives)
+    {
+        parent::setDirectives($directives);
+        $lifetime = $this->getLifetime(false);
+        if ($lifetime > 2592000) {
+            // #ZF-3490 : For the memcached backend, there is a lifetime limit of 30 days (2592000 seconds)
+            $this->_log('memcached backend has a limit of 30 days (2592000 seconds) for the lifetime');
+        }
+        if ($lifetime === null) {
+            // #ZF-4614 : we tranform null to zero to get the maximal lifetime
+            parent::setDirectives(array('lifetime' => 0));
+        }
+    }
+
+    /**
+     * Return an array of stored cache ids
+     *
+     * @return array array of stored cache ids (string)
+     */
+    public function getIds()
+    {
+        $this->_log("Zend_Cache_Backend_Libmemcached::save() : getting the list of cache ids is unsupported by the Libmemcached backend");
+        return array();
+    }
+
+    /**
+     * Return an array of stored tags
+     *
+     * @return array array of stored tags (string)
+     */
+    public function getTags()
+    {
+        $this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_LIBMEMCACHED_BACKEND);
+        return array();
+    }
+
+    /**
+     * Return an array of stored cache ids which match given tags
+     *
+     * In case of multiple tags, a logical AND is made between tags
+     *
+     * @param array $tags array of tags
+     * @return array array of matching cache ids (string)
+     */
+    public function getIdsMatchingTags($tags = array())
+    {
+        $this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_LIBMEMCACHED_BACKEND);
+        return array();
+    }
+
+    /**
+     * Return an array of stored cache ids which don't match given tags
+     *
+     * In case of multiple tags, a logical OR is made between tags
+     *
+     * @param array $tags array of tags
+     * @return array array of not matching cache ids (string)
+     */
+    public function getIdsNotMatchingTags($tags = array())
+    {
+        $this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_LIBMEMCACHED_BACKEND);
+        return array();
+    }
+
+    /**
+     * Return an array of stored cache ids which match any given tags
+     *
+     * In case of multiple tags, a logical AND is made between tags
+     *
+     * @param array $tags array of tags
+     * @return array array of any matching cache ids (string)
+     */
+    public function getIdsMatchingAnyTags($tags = array())
+    {
+        $this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_LIBMEMCACHED_BACKEND);
+        return array();
+    }
+
+    /**
+     * Return the filling percentage of the backend storage
+     *
+     * @throws Zend_Cache_Exception
+     * @return int integer between 0 and 100
+     */
+    public function getFillingPercentage()
+    {
+        $mems = $this->_memcache->getStats();
+        if ($mems === false) {
+            return 0;
+        }
+
+        $memSize = null;
+        $memUsed = null;
+        foreach ($mems as $key => $mem) {
+            if ($mem === false) {
+                $this->_log('can\'t get stat from ' . $key);
+                continue;
+            }
+
+            $eachSize = $mem['limit_maxbytes'];
+            $eachUsed = $mem['bytes'];
+            if ($eachUsed > $eachSize) {
+                $eachUsed = $eachSize;
+            }
+
+            $memSize += $eachSize;
+            $memUsed += $eachUsed;
+        }
+
+        if ($memSize === null || $memUsed === null) {
+            Zend_Cache::throwException('Can\'t get filling percentage');
+        }
+
+        return ((int) (100. * ($memUsed / $memSize)));
+    }
+
+    /**
+     * Return an array of metadatas for the given cache id
+     *
+     * The array must include these keys :
+     * - expire : the expire timestamp
+     * - tags : a string array of tags
+     * - mtime : timestamp of last modification time
+     *
+     * @param string $id cache id
+     * @return array array of metadatas (false if the cache id is not found)
+     */
+    public function getMetadatas($id)
+    {
+        $tmp = $this->_memcache->get($id);
+        if (isset($tmp[0], $tmp[1], $tmp[2])) {
+            $data     = $tmp[0];
+            $mtime    = $tmp[1];
+            $lifetime = $tmp[2];
+            return array(
+                'expire' => $mtime + $lifetime,
+                'tags' => array(),
+                'mtime' => $mtime
+            );
+        }
+
+        return false;
+    }
+
+    /**
+     * Give (if possible) an extra lifetime to the given cache id
+     *
+     * @param string $id cache id
+     * @param int $extraLifetime
+     * @return boolean true if ok
+     */
+    public function touch($id, $extraLifetime)
+    {
+        $tmp = $this->_memcache->get($id);
+        if (isset($tmp[0], $tmp[1], $tmp[2])) {
+            $data     = $tmp[0];
+            $mtime    = $tmp[1];
+            $lifetime = $tmp[2];
+            $newLifetime = $lifetime - (time() - $mtime) + $extraLifetime;
+            if ($newLifetime <=0) {
+                return false;
+            }
+            // #ZF-5702 : we try replace() first becase set() seems to be slower
+            if (!($result = $this->_memcache->replace($id, array($data, time(), $newLifetime), $newLifetime))) {
+                $result = $this->_memcache->set($id, array($data, time(), $newLifetime), $newLifetime);
+                if ($result === false) {
+                    $rsCode = $this->_memcache->getResultCode();
+                    $rsMsg  = $this->_memcache->getResultMessage();
+                    $this->_log("Memcached::set() failed: [{$rsCode}] {$rsMsg}");
+                }
+            }
+            return $result;
+        }
+        return false;
+    }
+
+    /**
+     * Return an associative array of capabilities (booleans) of the backend
+     *
+     * The array must include these keys :
+     * - automatic_cleaning (is automating cleaning necessary)
+     * - tags (are tags supported)
+     * - expired_read (is it possible to read expired cache records
+     *                 (for doNotTestCacheValidity option for example))
+     * - priority does the backend deal with priority when saving
+     * - infinite_lifetime (is infinite lifetime can work with this backend)
+     * - get_list (is it possible to get the list of cache ids and the complete list of tags)
+     *
+     * @return array associative of with capabilities
+     */
+    public function getCapabilities()
+    {
+        return array(
+            'automatic_cleaning' => false,
+            'tags' => false,
+            'expired_read' => false,
+            'priority' => false,
+            'infinite_lifetime' => false,
+            'get_list' => false
+        );
+    }
+
+}

tests/TestConfiguration.php.dist

@@ -56,15 +56,17 @@ define('TESTS_ZEND_AUTH_ADAPTER_LDAP_ONLINE_ENABLED', false);
 /**
  * Zend_Cache
  *
- * TESTS_ZEND_CACHE_SQLITE_ENABLED    => sqlite extension has to be enabled
- * TESTS_ZEND_CACHE_APC_ENABLED       => apc extension has to be enabled
- * TESTS_ZEND_CACHE_MEMCACHED_ENABLED => memcache extension has to be enabled and
- *                                       a memcached server has to be available
- * TESTS_ZEND_CACHE_XCACHE_ENABLED    => xcache extension has to be enabled
+ * TESTS_ZEND_CACHE_SQLITE_ENABLED     => sqlite extension has to be enabled
+ * TESTS_ZEND_CACHE_APC_ENABLED        => apc extension has to be enabled
+ * TESTS_ZEND_CACHE_MEMCACHED_ENABLED  => memcache extension has to be enabled and
+ *                                        a memcached server has to be available
+ * TESTS_ZEND_CACHE_LIBMEMCACHED_ENABLED => memcached extension has to be enabled and
+ *                                          a memcached server has to be available
+ * TESTS_ZEND_CACHE_XCACHE_ENABLED     => xcache extension has to be enabled
  */
 define('TESTS_ZEND_CACHE_SQLITE_ENABLED', false);
 define('TESTS_ZEND_CACHE_APC_ENABLED', false);
-define('TESTS_ZEND_CACHE_XCACHE_ENABLED', true);
+define('TESTS_ZEND_CACHE_XCACHE_ENABLED', false);
 define('TESTS_ZEND_CACHE_XCACHE_USER', null);
 define('TESTS_ZEND_CACHE_XCACHE_PASSWORD', null);
 define('TESTS_ZEND_CACHE_PLATFORM_ENABLED', false);
@@ -72,6 +74,10 @@ define('TESTS_ZEND_CACHE_MEMCACHED_ENABLED', false);
 define('TESTS_ZEND_CACHE_MEMCACHED_HOST', '127.0.0.1');
 define('TESTS_ZEND_CACHE_MEMCACHED_PORT', 11211);
 define('TESTS_ZEND_CACHE_MEMCACHED_PERSISTENT', true);
+define('TESTS_ZEND_CACHE_LIBMEMCACHED_ENABLED', false);
+define('TESTS_ZEND_CACHE_LIBMEMCACHED_HOST', '127.0.0.1');
+define('TESTS_ZEND_CACHE_LIBMEMCACHED_PORT', 11211);
+define('TESTS_ZEND_CACHE_LIBMEMCACHED_WEIGHT', 1);
 
 /**
  * Zend_Cloud online tests

tests/Zend/Cache/AllTests.php

@@ -35,6 +35,7 @@ require_once 'Zend/Cache/FileFrontendTest.php';
 require_once 'Zend/Cache/FunctionFrontendTest.php';
 require_once 'Zend/Cache/ManagerTest.php';
 require_once 'Zend/Cache/MemcachedBackendTest.php';
+require_once 'Zend/Cache/LibmemcachedBackendTest.php';
 require_once 'Zend/Cache/OutputFrontendTest.php';
 require_once 'Zend/Cache/PageFrontendTest.php';
 require_once 'Zend/Cache/SkipTests.php';
@@ -150,6 +151,31 @@ class Zend_Cache_AllTests
         }
 
         /*
+         * Check if Memcached2 tests are enabled, and if extension is available.
+         */
+        if (!defined('TESTS_ZEND_CACHE_LIBMEMCACHED_ENABLED') ||
+            constant('TESTS_ZEND_CACHE_LIBMEMCACHED_ENABLED') === false) {
+            $skipTest = new Zend_Cache_LibmemcachedBackendTest_SkipTests();
+            $skipTest->message = 'Tests are not enabled in TestConfiguration.php';
+            $suite->addTest($skipTest);
+        } else if (!extension_loaded('memcached')) {
+            $skipTest = new Zend_Cache_LibmemcachedBackendTest_SkipTests();
+            $skipTest->message = "Extension 'Memcached' is not loaded";
+            $suite->addTest($skipTest);
+        } else {
+            if (!defined('TESTS_ZEND_CACHE_LIBMEMCACHED_HOST')) {
+                define('TESTS_ZEND_CACHE_LIBMEMCACHED_HOST', '127.0.0.1');
+            }
+            if (!defined('TESTS_ZEND_CACHE_LIBMEMCACHED_PORT')) {
+                define('TESTS_ZEND_CACHE_LIBMEMCACHED_PORT', 11211);
+            }
+            if (!defined('TESTS_ZEND_CACHE_LIBMEMCACHED_WEIGHT')) {
+                define('TESTS_ZEND_CACHE_LIBMEMCACHED_WEIGHT', 1);
+            }
+            $suite->addTestSuite('Zend_Cache_LibmemcachedBackendTest');
+        }
+
+        /*
          * Check if Zend Platform tests are enabled, and if extension is available.
          */
         if (!defined('TESTS_ZEND_CACHE_PLATFORM_ENABLED') ||

tests/Zend/Cache/LibmemcachedBackendTest.php

@@ -0,0 +1,178 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Cache
+ * @subpackage UnitTests
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id$
+ */
+
+/**
+ * Zend_Cache
+ */
+require_once 'Zend/Cache.php';
+require_once 'Zend/Cache/Backend/Libmemcached.php';
+
+/**
+ * Common tests for backends
+ */
+require_once 'CommonExtendedBackendTest.php';
+
+/**
+ * PHPUnit test case
+ */
+require_once 'PHPUnit/Framework/TestCase.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Cache
+ * @subpackage UnitTests
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @group      Zend_Cache
+ */
+class Zend_Cache_LibmemcachedBackendTest extends Zend_Cache_CommonExtendedBackendTest {
+
+    protected $_instance;
+
+    public function __construct($name = null, array $data = array(), $dataName = '')
+    {
+        parent::__construct('Zend_Cache_Backend_Libmemcached', $data, $dataName);
+    }
+
+    public function setUp($notag = true)
+    {
+        $serverValid = array(
+            'host'   => TESTS_ZEND_CACHE_LIBMEMCACHED_HOST,
+            'port'   => TESTS_ZEND_CACHE_LIBMEMCACHED_PORT,
+            'weight' => TESTS_ZEND_CACHE_LIBMEMCACHED_WEIGHT
+        );
+        $serverFail = array(
+            'host'   => 'not.exist',
+            'port'   => TESTS_ZEND_CACHE_LIBMEMCACHED_PORT,
+            'weight' => TESTS_ZEND_CACHE_LIBMEMCACHED_WEIGHT
+        );
+        $options = array(
+            'servers' => array($serverValid, $serverFail)
+        );
+        $this->_instance = new Zend_Cache_Backend_Libmemcached($options);
+        parent::setUp($notag);
+    }
+
+    public function tearDown()
+    {
+        parent::tearDown();
+        unset($this->_instance);
+        // We have to wait after a memcached flush
+        sleep(1);
+    }
+
+    public function testConstructorCorrectCall()
+    {
+        $test = new Zend_Cache_Backend_Libmemcached();
+    }
+
+    public function testCleanModeOld()
+    {
+        $this->_instance->setDirectives(array('logging' => false));
+        $this->_instance->clean('old');
+        // do nothing, just to see if an error occured
+        $this->_instance->setDirectives(array('logging' => true));
+    }
+
+    public function testCleanModeMatchingTags()
+    {
+        $this->_instance->setDirectives(array('logging' => false));
+        $this->_instance->clean('matchingTag', array('tag1'));
+        // do nothing, just to see if an error occured
+        $this->_instance->setDirectives(array('logging' => true));
+    }
+
+    public function testCleanModeNotMatchingTags()
+    {
+        $this->_instance->setDirectives(array('logging' => false));
+        $this->_instance->clean('notMatchingTag', array('tag1'));
+        // do nothing, just to see if an error occured
+        $this->_instance->setDirectives(array('logging' => true));
+    }
+
+    public function testGetWithCompression()
+    {
+        $this->_instance->setOption('compression', true);
+        $this->testGetWithAnExistingCacheIdAndUTFCharacters();
+    }
+
+    public function testConstructorWithAnAlternativeSyntax()
+    {
+        $server = array(
+            'host'   => TESTS_ZEND_CACHE_LIBMEMCACHED_HOST,
+            'port'   => TESTS_ZEND_CACHE_LIBMEMCACHED_PORT,
+            'weight' => TESTS_ZEND_CACHE_LIBMEMCACHED_WEIGHT
+        );
+        $options = array(
+            'servers' => $server
+        );
+        $this->_instance = new Zend_Cache_Backend_Libmemcached($options);
+        $this->testGetWithAnExistingCacheIdAndUTFCharacters();
+    }
+
+    // Because of limitations of this backend...
+    public function testGetWithAnExpiredCacheId() {}
+    public function testCleanModeMatchingTags2() {}
+    public function testCleanModeNotMatchingTags2() {}
+    public function testCleanModeNotMatchingTags3() {}
+    public function testSaveCorrectCall()
+    {
+        $this->_instance->setDirectives(array('logging' => false));
+        parent::testSaveCorrectCall();
+        $this->_instance->setDirectives(array('logging' => true));
+    }
+
+    public function testSaveWithNullLifeTime()
+    {
+        $this->_instance->setDirectives(array('logging' => false));
+        parent::testSaveWithNullLifeTime();
+        $this->_instance->setDirectives(array('logging' => true));
+    }
+
+    public function testSaveWithSpecificLifeTime()
+    {
+
+        $this->_instance->setDirectives(array('logging' => false));
+        parent::testSaveWithSpecificLifeTime();
+        $this->_instance->setDirectives(array('logging' => true));
+    }
+
+    public function testGetMetadatas($notag = false)
+    {
+        parent::testGetMetadatas(true);
+    }
+
+    public function testGetFillingPercentage()
+    {
+        $this->_instance->setDirectives(array('logging' => false));
+        parent::testGetFillingPercentage();
+    }
+
+    public function testGetFillingPercentageOnEmptyBackend()
+    {
+        $this->_instance->setDirectives(array('logging' => false));
+        parent::testGetFillingPercentageOnEmptyBackend();
+    }
+
+}
+
+

tests/Zend/Cache/SkipTests.php

@@ -98,6 +98,19 @@ class Zend_Cache_MemcachedBackendTest_SkipTests extends Zend_Cache_BackendTest_S
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @group      Zend_Cache
  */
+class Zend_Cache_LibmemcachedBackendTest_SkipTests extends Zend_Cache_BackendTest_SkipTests
+{
+}
+
+
+/**
+ * @category   Zend
+ * @package    Zend_Cache
+ * @subpackage UnitTests
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @group      Zend_Cache
+ */
 class Zend_Cache_SqliteBackendTest_SkipTests extends Zend_Cache_BackendTest_SkipTests
 {
 }