public function getOrSet($key, $callable, $duration = null, $dependency = null)
    {
        if (($value = $this->get($key)) !== false) {
            return $value;
        }
 
        $value = call_user_func($callable, $this);
        if (!$this->set($key, $value, $duration, $dependency)) {
            Yii::warning('Failed to set cache value for key ' . json_encode($key), __METHOD__);
        }
 
        return $value;
    }
                

                         */
    public function __construct($config = [])
    {
        if (!empty($config)) {
            Yii::configure($this, $config);
        }
        $this->init();
    }
 
    /**
     * Initializes the object.
     * This method is invoked at the end of the constructor after the object is initialized with the
     * given configuration.
                

                     
        $dependencies = $this->resolveDependencies($dependencies, $reflection);
        if (!$reflection->isInstantiable()) {
            throw new NotInstantiableException($reflection->name);
        }
        if (empty($config)) {
            return $reflection->newInstanceArgs($dependencies);
        }
 
        $config = $this->resolveDependencies($config);
 
        if (!empty($dependencies) && $reflection->implementsInterface('yii\base\Configurable')) {
            // set $config as the last parameter (existing one will be overwritten)
                

                        public function get($class, $params = [], $config = [])
    {
        if (isset($this->_singletons[$class])) {
            // singleton
            return $this->_singletons[$class];
        } elseif (!isset($this->_definitions[$class])) {
            return $this->build($class, $params, $config);
        }
 
        $definition = $this->_definitions[$class];
 
        if (is_callable($definition, true)) {
            $params = $this->resolveDependencies($this->mergeParams($class, $params));
                

                        {
        if (is_string($type)) {
            return static::$container->get($type, $params);
        } elseif (is_array($type) && isset($type['class'])) {
            $class = $type['class'];
            unset($type['class']);
            return static::$container->get($class, $params, $type);
        } elseif (is_callable($type, true)) {
            return static::$container->invoke($type, $params);
        } elseif (is_array($type)) {
            throw new InvalidConfigException('Object configuration must be an array containing a "class" element.');
        }
 
                

                            if (isset($this->_definitions[$id])) {
            $definition = $this->_definitions[$id];
            if (is_object($definition) && !$definition instanceof Closure) {
                return $this->_components[$id] = $definition;
            }
 
            return $this->_components[$id] = Yii::createObject($definition);
        } elseif ($throwException) {
            throw new InvalidConfigException("Unknown component ID: $id");
        }
 
        return null;
    }
                

                         * Since version 2.0.13, if a component isn't defined in the module, it will be looked up in the parent module.
     * The parent module may be the application.
     */
    public function get($id, $throwException = true)
    {
        if (!isset($this->module)) {
            return parent::get($id, $throwException);
        }
 
        $component = parent::get($id, false);
        if ($component === null) {
            $component = $this->module->get($id, $throwException);
        }
                

                         * @param string $name component or property name
     * @return mixed the named property value
     */
    public function __get($name)
    {
        if ($this->has($name)) {
            return $this->get($name);
        }
 
        return parent::__get($name);
    }
 
    /**
                

                         */
    public function __construct($config = [])
    {
        if (!empty($config)) {
            Yii::configure($this, $config);
        }
        $this->init();
    }
 
    /**
     * Initializes the object.
     * This method is invoked at the end of the constructor after the object is initialized with the
     * given configuration.
                

                     
        $dependencies = $this->resolveDependencies($dependencies, $reflection);
        if (!$reflection->isInstantiable()) {
            throw new NotInstantiableException($reflection->name);
        }
        if (empty($config)) {
            return $reflection->newInstanceArgs($dependencies);
        }
 
        $config = $this->resolveDependencies($config);
 
        if (!empty($dependencies) && $reflection->implementsInterface('yii\base\Configurable')) {
            // set $config as the last parameter (existing one will be overwritten)
                

                        public function get($class, $params = [], $config = [])
    {
        if (isset($this->_singletons[$class])) {
            // singleton
            return $this->_singletons[$class];
        } elseif (!isset($this->_definitions[$class])) {
            return $this->build($class, $params, $config);
        }
 
        $definition = $this->_definitions[$class];
 
        if (is_callable($definition, true)) {
            $params = $this->resolveDependencies($this->mergeParams($class, $params));
                

                        {
        if (is_string($type)) {
            return static::$container->get($type, $params);
        } elseif (is_array($type) && isset($type['class'])) {
            $class = $type['class'];
            unset($type['class']);
            return static::$container->get($class, $params, $type);
        } elseif (is_callable($type, true)) {
            return static::$container->invoke($type, $params);
        } elseif (is_array($type)) {
            throw new InvalidConfigException('Object configuration must be an array containing a "class" element.');
        }
 
                

                            if (isset($this->_definitions[$id])) {
            $definition = $this->_definitions[$id];
            if (is_object($definition) && !$definition instanceof Closure) {
                return $this->_components[$id] = $definition;
            }
 
            return $this->_components[$id] = Yii::createObject($definition);
        } elseif ($throwException) {
            throw new InvalidConfigException("Unknown component ID: $id");
        }
 
        return null;
    }
                

                         * Since version 2.0.13, if a component isn't defined in the module, it will be looked up in the parent module.
     * The parent module may be the application.
     */
    public function get($id, $throwException = true)
    {
        if (!isset($this->module)) {
            return parent::get($id, $throwException);
        }
 
        $component = parent::get($id, false);
        if ($component === null) {
            $component = $this->module->get($id, $throwException);
        }
                

                                    Yii::debug('Bootstrap with Closure', __METHOD__);
                if (!$component = call_user_func($mixed, $this)) {
                    continue;
                }
            } elseif (is_string($mixed)) {
                if ($this->has($mixed)) {
                    $component = $this->get($mixed);
                } elseif ($this->hasModule($mixed)) {
                    $component = $this->getModule($mixed);
                } elseif (strpos($mixed, '\\') === false) {
                    throw new InvalidConfigException("Unknown bootstrapping component ID: $mixed");
                }
            }
                

                        protected function bootstrap()
    {
        $request = $this->getRequest();
        Yii::setAlias('@webroot', dirname($request->getScriptFile()));
        Yii::setAlias('@web', $request->getBaseUrl());
 
        parent::bootstrap();
    }
 
    /**
     * Handles the specified request.
     * @param Request $request the request to be handled
     * @return Response the resulting response
                

                        /**
     * {@inheritdoc}
     */
    public function init()
    {
        $this->state = self::STATE_INIT;
        $this->bootstrap();
    }
 
    /**
     * Initializes extensions and executes bootstrap components.
     * This method is called by [[init()]] after the application has been fully configured.
     * If you override this method, make sure you also call the parent implementation.
                

                         */
    public function __construct($config = [])
    {
        if (!empty($config)) {
            Yii::configure($this, $config);
        }
        $this->init();
    }
 
    /**
     * Initializes the object.
     * This method is invoked at the end of the constructor after the object is initialized with the
     * given configuration.
                

                            $this->state = self::STATE_BEGIN;
 
        $this->preInit($config);
 
        $this->registerErrorHandler($config);
 
        Component::__construct($config);
    }
 
    /**
     * Pre-initializes the application.
     * This method is called at the beginning of the application constructor.
     * It initializes several important application properties.