如何在ZF2中的ServiceManager中注册Zend\Log实例

Question

我想知道通过ZF2中的ServiceManager启动和重用logger实例的最佳方法是什么.当然,我可以在任何类中使用一种简单的方法,例如:

public function getLogger () {
        $this->logger = new Logger();
        $this->logger->addWriter(new Writer\Stream('/log/cms_errors.log'));
        return $logger;
    }

但我想知道在global.php中注册类似结构的最佳方法是什么.到目前为止,我可以

将以下内容添加到global.php中

'Zend\Log'=>array(
        'timestampFormat' => 'Y-m-d',
        array(
            'writerName'   => 'Stream',
            'writerParams' => array(
                'stream'   => '/log/zend.log',
            ),
            'formatterName' => 'Simple',            
        ),
    ),

如果我尝试通过以下方式调用它:

$this->getServiceLocator()->get('Zend\Log')

我得到一个:

Zend\ServiceManager\ServiceManager::get was unable to fetch or create an instance for Zend\Log

Answer 1

将以下数据添加到'global.php'

'service_manager' => array(
    'factories' => array(
        'Zend\Log' => function ($sm) {
            $log = new Zend\Log\Logger();
            $writer = new Zend\Log\Writer\Stream('./data/logs/logfile');
            $log->addWriter($writer);

            return $log;
        },
    ),
),

然后你就可以打电话了

$this->getServiceLocator()->get('Zend\Log')->info('Something...');

Answer 2

或者,更优雅的是,您可以设置日志监听器并使您的记录器与您的应用程序分离.这EventManager是一个非常强大的组件,ZF2现在基本上是一个事件驱动的框架.

在你的module.php你可以添加如下内容:

// Setup the Zend Logger, pseudocode
$logger = new Logger;
$writer = new Writer;
$logger->addWriter($writer);

// Attach a logging listener for the log event on application level, working code
$events = StaticEventManager::getInstance();
$events->attach('*', 'log', function($event) use ($logger) {
    $target = get_class($event->getTarget());
    $message = $event->getParam('message', 'No message provided');
    $priority = (int) $event->getParam('priority', Logger::INFO);
    $message = sprintf('%s: %s', $target, $message);
    $logger->log($priority, $message);
});

然后从任何地方,例如从Controller,您可以:

$this->getEventManager()->trigger('log', $this, array(
                                                       'priority' => 7, 
                                                       'message' => 'some log message'
                                                      ));