本篇文章给大家带来了关于PHP设计模式的相关知识,其中主要介绍了PHP是怎么实现职责链设计模式的,下面一起来看一下,希望对需要的朋友有所帮助。
参考文章地址:深入聊聊设计模式利器之“职责链模式”(附go实现流程)
实现原理看参考文章就好了 原文是用 go 语言去实现,这里写一个 php 版本的实现方式,框架用的 hyperf。
文件结构:
IndexController 为调用端,UserInfoEntity 用户实体用于存用户信息,flow 里面的为各种处理流程
IndexController
<?php declare(strict_types=1); /** * This file is part of Hyperf. * * @link https://www.hyperf.io * @document https://hyperf.wiki * @contact group@hyperf.io * @license https://github.com/hyperf/hyperf/blob/master/LICENSE */ namespace App\Controller; use App\Service\Entity\UserInfoEntity; use App\Service\Flow\Cashier; use App\Service\Flow\Clinic; use App\Service\Flow\Pharmacy; use App\Service\Flow\Reception; use App\Service\StartHandler; class IndexController extends AbstractController { public function index() { $startHandler = new StartHandler(); $userInfo = (new UserInfoEntity())->setName('zhangsan'); $startHandler->setNextHandler(new Reception()) ->setNextHandler(new Clinic()) ->setNextHandler(new Cashier()) ->setNextHandler(new Pharmacy()); $startHandler->execute($userInfo); } }
UserInfoEntity
<?php declare(strict_types=1); /** * This file is part of Hyperf. * * @link https://www.hyperf.io * @document https://hyperf.wiki * @contact group@hyperf.io * @license https://github.com/hyperf/hyperf/blob/master/LICENSE */ namespace App\Service\Entity; class UserInfoEntity { private string $name; private bool $registrationDone = false; private bool $doctorCheckUpDone = false; private bool $medicineDone = false; private bool $paymentDone = false; public function getName(): string { return $this->name; } public function setName(string $name): UserInfoEntity { $this->name = $name; return $this; } public function isRegistrationDone(): bool { return $this->registrationDone; } public function setRegistrationDone(bool $registrationDone): UserInfoEntity { $this->registrationDone = $registrationDone; return $this; } public function isDoctorCheckUpDone(): bool { return $this->doctorCheckUpDone; } public function setDoctorCheckUpDone(bool $doctorCheckUpDone): UserInfoEntity { $this->doctorCheckUpDone = $doctorCheckUpDone; return $this; } public function isMedicineDone(): bool { return $this->medicineDone; } public function setMedicineDone(bool $medicineDone): UserInfoEntity { $this->medicineDone = $medicineDone; return $this; } public function isPaymentDone(): bool { return $this->paymentDone; } public function setPaymentDone(bool $paymentDone): UserInfoEntity { $this->paymentDone = $paymentDone; return $this; } }
HandlerInterface
<?php declare(strict_types=1); /** * This file is part of Hyperf. * * @link https://www.hyperf.io * @document https://hyperf.wiki * @contact group@hyperf.io * @license https://github.com/hyperf/hyperf/blob/master/LICENSE */ namespace App\Service; use App\Service\Entity\UserInfoEntity; interface HandlerInterface { public function setNextHandler(HandlerInterface $handler): HandlerInterface; public function execute(UserInfoEntity $info); public function do(UserInfoEntity $info); }
AbstractHandler
<?php declare(strict_types=1); /** * This file is part of Hyperf. * * @link https://www.hyperf.io * @document https://hyperf.wiki * @contact group@hyperf.io * @license https://github.com/hyperf/hyperf/blob/master/LICENSE */ namespace App\Service; use App\Service\Entity\UserInfoEntity; class AbstractHandler implements HandlerInterface { private HandlerInterface $nextHandler; public function setNextHandler(HandlerInterface $handler): HandlerInterface { $this->nextHandler = $handler; return $this->nextHandler; } public function execute(UserInfoEntity $info) { if (! empty($this->nextHandler)) { try { $this->nextHandler->do($info); } catch (\Exception $e) { return; } return $this->nextHandler->execute($info); } } public function do(UserInfoEntity $info) { // TODO: Implement do() method. } }
StartHandler
<?php declare(strict_types=1); /** * This file is part of Hyperf. * * @link https://www.hyperf.io * @document https://hyperf.wiki * @contact group@hyperf.io * @license https://github.com/hyperf/hyperf/blob/master/LICENSE */ namespace App\Service; class StartHandler extends AbstractHandler { }
Cashier
<?php declare(strict_types=1); /** * This file is part of Hyperf. * * @link https://www.hyperf.io * @document https://hyperf.wiki * @contact group@hyperf.io * @license https://github.com/hyperf/hyperf/blob/master/LICENSE */ namespace App\Service\Flow; use App\Service\AbstractHandler; use App\Service\Entity\UserInfoEntity; class Cashier extends AbstractHandler { public function do(UserInfoEntity $info) { echo '收费' . PHP_EOL; $info->setPaymentDone(true); } }
Clinic
<?php declare(strict_types=1); /** * This file is part of Hyperf. * * @link https://www.hyperf.io * @document https://hyperf.wiki * @contact group@hyperf.io * @license https://github.com/hyperf/hyperf/blob/master/LICENSE */ namespace App\Service\Flow; use App\Service\AbstractHandler; use App\Service\Entity\UserInfoEntity; class Clinic extends AbstractHandler { public function do(UserInfoEntity $info) { echo '诊室' . PHP_EOL; $info->setDoctorCheckUpDone(true); } }
Pharmacy
<?php declare(strict_types=1); /** * This file is part of Hyperf. * * @link https://www.hyperf.io * @document https://hyperf.wiki * @contact group@hyperf.io * @license https://github.com/hyperf/hyperf/blob/master/LICENSE */ namespace App\Service\Flow; use App\Service\AbstractHandler; use App\Service\Entity\UserInfoEntity; class Pharmacy extends AbstractHandler { public function do(UserInfoEntity $info) { echo '药房' . PHP_EOL; $info->setMedicineDone(true); } }
Reception
<?php declare(strict_types=1); /** * This file is part of Hyperf. * * @link https://www.hyperf.io * @document https://hyperf.wiki * @contact group@hyperf.io * @license https://github.com/hyperf/hyperf/blob/master/LICENSE */ namespace App\Service\Flow; // 挂号 use App\Service\AbstractHandler; use App\Service\Entity\UserInfoEntity; class Reception extends AbstractHandler { public function do(UserInfoEntity $info) { echo '挂号' . PHP_EOL; $info->setRegistrationDone(true); } }
写一个单元测试跑一下 indexController 的 index 方法,结果如下:
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