[Feature] add cache manager service

Add cache manager to get registered memcache pools and
flush all pools at once.

Cache/MemcacheManager.php

@@ -0,0 +1,87 @@
+<?php
+
+namespace Lsw\MemcacheBundle\Cache;
+
+/**
+ * Central class to manage single memcache instances.
+ *
+ * @author David Geistert <[email protected]>
+ */
+class MemcacheManager
+{
+    /**
+     * Registered memcache pools.
+     *
+     * @var MemcacheInterface[]
+     */
+    private $pools;
+
+    /**
+     * Inititialize empty pool collection.
+     */
+    public function __construct()
+    {
+        $this->pools = array();
+    }
+
+    /**
+     * Add registered memcache.
+     *
+     * @param string            $name     memcache name obtained from config
+     * @param MemcacheInterface $memcache
+     */
+    public function addMemcachePool($name, MemcacheInterface $memcache)
+    {
+        $this->pools[$name] = $memcache;
+    }
+
+    /**
+     * Get memcache service by name if it exists.
+     *
+     * @param string $name memcache name
+     *
+     * @return null|MemcacheInterface
+     */
+    public function getMemcache($name)
+    {
+        if (array_key_exists($name, $this->pools)) {
+            return $this->pools[$name];
+        }
+    }
+
+    /**
+     * Get all memcache pools.
+     *
+     * @return array
+     */
+    public function getMemcaches()
+    {
+        return $this->pools;
+    }
+
+    /**
+     * Flush memcache by name.
+     *
+     * @param string $name memcache name
+     *
+     * @return bool TRUE if flush was successful, FALSE otherwise
+     */
+    public function flushMemcache($name)
+    {
+        if ($memcache = $this->getMemcache($name)) {
+            return $memcache->flush();
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Flush all registered memcaches.
+     */
+    public function flushAllMemcaches()
+    {
+        foreach ($this->pools as $memcache) {
+            $memcache->flush();
+        }
+    }
+}

DependencyInjection/LswMemcacheExtension.php

@@ -126,7 +126,7 @@ protected function loadDoctrine(array $config, ContainerBuilder $container)
             }
         }
     }
-    
+
     /**
      * Loads the Firewall configuration.
      *
@@ -211,7 +211,7 @@ private function newMemcacheClient($name, array $config, ContainerBuilder $conta
                 $memcache->addMethodCall('addServer', $server);
             }
         }
-        
+
         $memcache->addArgument($config['options']);
 
         $options = array();
@@ -223,11 +223,16 @@ private function newMemcacheClient($name, array $config, ContainerBuilder $conta
         // Add the service to the container
         $serviceName = sprintf('memcache.%s', $name);
         $container->setDefinition($serviceName, $memcache);
+
         // Add the service to the data collector
         if ($container->hasDefinition('memcache.data_collector')) {
             $definition = $container->getDefinition('memcache.data_collector');
             $definition->addMethodCall('addClient', array($name, $options, new Reference($serviceName)));
         }
+
+        // Add the service to the manager
+        $container->getDefinition('memcache.memcache_manager')
+            ->addMethodCall('addMemcachePool', array($name, new Reference($serviceName)));
     }
 
 }

Resources/config/config.yml

@@ -2,3 +2,7 @@ parameters:
     memcache.doctrine_cache.class: Lsw\MemcacheBundle\Doctrine\Cache\MemcacheCache
     memcache.session_handler.class: Lsw\MemcacheBundle\Session\Storage\LockingSessionHandler
     memcache.firewall_handler.class: Lsw\MemcacheBundle\Firewall\FirewallHandler
+
+services:
+    memcache.memcache_manager:
+        class: Lsw\MemcacheBundle\Cache\MemcacheManager 

Tests/Cache/MemcacheManagerTest.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace Lsw\MemcacheBundle\Tests\Cache;
+
+
+use Lsw\MemcacheBundle\Cache\MemcacheManager;
+use Lsw\MemcacheBundle\Cache\LoggingMemcache;
+
+/**
+ * Testing the MemcacheManager Class.
+ *
+ * @author David Geistert <[email protected]>
+ */
+class MemcacheManagerTest extends \PHPUnit_Framework_TestCase
+{
+    public function testConstruct()
+    {
+        $cache = new LoggingMemcache(false);
+        $cache->addServer('localhost', '11211');
+        $cacheManager = new MemcacheManager();
+
+        $this->assertEquals(array(), $cacheManager->getMemcaches());
+
+        $cacheManager->addMemcachePool('foo', $cache);
+
+        $this->assertArrayHasKey('foo', $cacheManager->getMemcaches());
+        $this->assertEquals($cache, $cacheManager->getMemcache('foo'));
+
+        return array($cache, $cacheManager);
+    }
+
+    /**
+     * @depends testConstruct
+     */
+	public function testFlush($args)
+    {
+        list($cache, $cacheManager) = $args;
+
+        $cache->set('key', 'value');
+        $this->assertEquals('value', $cache->get('key'));
+
+        $this->assertFalse($cacheManager->flushMemcache('bar'));
+        $this->assertTrue($cacheManager->flushMemcache('foo'));
+        $this->assertNull($cache->get('key'));
+
+        $cache->set('key', 'value');
+        $this->assertEquals('value', $cache->get('key'));
+        $cacheManager->flushAllMemcaches();
+
+        $this->assertNull($cache->get('key'));
+
+    }
+}