Broker.php

<?php
class Dsao_Module_Broker
{
  const XML_MODULE_INFO_DIR = 'modules/meta/info';

  protected static $_instance = null;

  protected $_modulesActive = array();

  protected $_modulesNotActive = array();

  protected function __construct()
  {
    $modulesLoader = new Dsao_Xml_Loader(XML_DIR.self::XML_MODULE_INFO_DIR);

    // Module durchgehen
    foreach ($modulesLoader->getXmlObjects() as $object)
    {
      // Modul instanziieren
      $module = new Dsao_Module($object->name, (bool) $object->active);

      // Zu internen Arrays hinzufügen
      if ($module->isActive())
      {
        $this->_modulesActive[$module->getName()] = $module;
      }
      else
      {
        $this->_modulesNotActive[$module->getName()] = $module;
      }
    }
  }

  public static function getInstance()
  {
    // Falls Instanz noch nicht initialisiert
    if (null === self::$_instance)
    {
      $cacheLoader = new Dsao_Cache_Loader('File',
        array('automatic_serialization' => true,
              'master_files' => array(XML_DIR.self::XML_MODULE_INFO_DIR)));
      $cache = $cacheLoader->getCache();

      // Falls Modulmanager nicht im Cache vorhanden
      if (!(self::$_instance = $cache->load('moduleBroker')))
      {
        self::$_instance = new self();

        // Alle von den Modulen abhängigen Cache-Einträge entfernen
        $cache->clean(Zend_Cache::CLEANING_MODE_MATCHING_TAG, array('module'));

        $cache->save(self::$_instance, 'moduleBroker');
      }
    }

    return self::$_instance;
  }

  public function getModule($name)
  {
    $name = (string) $name;

    // Falls Modul aktives Modul
    if (isset($this->_modulesActive[$name]))
    {
      return $this->_modulesActive[$name];
    }
    // Falls Modul nicht aktives Modul
    else if (isset($this->_modulesNotActive[$name]))
    {
      return $this->_modulesNotActive[$name];
    }
    // Ansonsten ist Modul nicht vorhanden, Exception werfen
    else
    {
      throw new Dsao_Exception(array(
        'message' => 'dsao_module_manager_invalid_module',
        'variables' => array('name' => $name)
      ));
    }
  }

  public function getModules($namesOnly = false)
  {
    return $namesOnly
    ? array_keys(array_merge($this->_modulesActive, $this->_modulesNotActive))
    : array_merge($this->_modulesActive, $this->_modulesNotActive);
  }

  public function getModulesActive($namesOnly = false)
  {
    return $namesOnly ? array_keys($this->_modulesActive)
      : $this->_modulesActive;
  }

  public function getModulesNotActive($namesOnly = false)
  {
    return $namesOnly ? array_keys($this->_modulesNotActive)
      : $this->_modulesNotActive;
  }
}