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Home Backend Development PHP Tutorial 设计模式 - 在php项目中 各位兄台是怎么优雅的调用工具类库的呢?

设计模式 - 在php项目中 各位兄台是怎么优雅的调用工具类库的呢?

Jun 06, 2016 pm 08:40 PM
php system structure Design Patterns

最近一直在纠结 项目分层架构的问题 其中最纠结的就是在项目中 如何引入第三方类库

比如说 有个 msg控制器 要发送邮件

<code>class MsgConstroller extends Constroller {
    public function send() {
       $email = new email([options....]);
       $email->send();
    }
}
</code>
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Copy after login

这个控制器通过引入一个 email 工具类 实现了发送 email 的功能 但是如果同时要发送短信呢

<code>class MsgConstroller extends Constroller {
        public function send() {
           $email = new email([options....]);
           $sms = new sms([options....]);
           $email->send();
           $sms->send();
        }
    }
</code>
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Copy after login

这样感觉很不优雅 所以 我想到了使用个服务层来解决

<code>class MsgConstroller extends Constroller {
        public function send() {
          $msg = service('Msg');  //实例化一个Msg服务类 
          $msg->send('message,email,sms'); //通过send接口传的参数 会同时发送站内信、邮件、短信
        }
    }
</code>
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Copy after login

但是 这样 又会把 new 操作给转移到服务层 感觉还不是怎么理想 那么 大家有什么比较 简单优雅的解决方案吗?

回复内容:

最近一直在纠结 项目分层架构的问题 其中最纠结的就是在项目中 如何引入第三方类库

比如说 有个 msg控制器 要发送邮件

<code>class MsgConstroller extends Constroller {
    public function send() {
       $email = new email([options....]);
       $email->send();
    }
}
</code>
Copy after login
Copy after login

这个控制器通过引入一个 email 工具类 实现了发送 email 的功能 但是如果同时要发送短信呢

<code>class MsgConstroller extends Constroller {
        public function send() {
           $email = new email([options....]);
           $sms = new sms([options....]);
           $email->send();
           $sms->send();
        }
    }
</code>
Copy after login
Copy after login

这样感觉很不优雅 所以 我想到了使用个服务层来解决

<code>class MsgConstroller extends Constroller {
        public function send() {
          $msg = service('Msg');  //实例化一个Msg服务类 
          $msg->send('message,email,sms'); //通过send接口传的参数 会同时发送站内信、邮件、短信
        }
    }
</code>
Copy after login
Copy after login

但是 这样 又会把 new 操作给转移到服务层 感觉还不是怎么理想 那么 大家有什么比较 简单优雅的解决方案吗?

你的做法已经可以了。再优化可以再包裹一个有依赖注入的消息类,邮件短信各种类全变成私有变量,操作方法里传入参数控制是否实例化并赋值给私有变量,send方法支持连缀,用起来类似于

<code>$message = new Message();
$result = $message->send(array('mail', 'mail_address'))->send(array('sms', 'tel'));
</code>
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再切设计模式也是万变不离其宗,又想用着爽又想升级改动的时候好维护是没有出路的。封装粒度太粗好用难改;太细好改难用。

再一个,别什么都跟优雅扯上关系,就两行程序而已哪那么多优雅。

sms和email等同时实现send()方法接口,再用Composite设计模式组合起来怎样?

<code>class MsgConstroller extends Constroller {
    public function send() {
      $msg = new MsgComposite();
      $msg->add(new email());
      $msg->add(new sms());
      $msg->send();
    }
}
</code>
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new操作现在框架好像都喜欢用统一的ServiceLocator解决,方便统一替换利于单元测试

类似这种需求更合适 Service ,在 Symfony2 中可以使用服务,只需配置好服务可以在全局任何地方调用:

<code>$mailer = $this->get('mailer');
</code>
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同理:

<code>$sms = $this->get('sms');
</code>
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参考:

http://symfony.com/doc/current/book/service_container.html

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