• 技术文章 >后端开发 >php教程

    一文详解PHP实现职责链设计模式(附代码示例)

    藏色散人藏色散人2023-01-17 11:50:31转载180

    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。

    PHP实现职责链设计模式

    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

    8fbf1f3ee06110c577dd31976a58e62.jpg

    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:

    cec1aaca54e57f053b82c91f29a7a9a.jpg

    推荐学习:《PHP视频教程

    以上就是一文详解PHP实现职责链设计模式(附代码示例)的详细内容,更多请关注php中文网其它相关文章!

    声明:本文转载于:learnku,如有侵犯,请联系admin@php.cn删除
    专题推荐:php 职责链
    上一篇:php实现通过JSON RPC与go通讯(附代码) 下一篇:自己动手写 PHP MVC 框架(40节精讲/巨细/新人进阶必看)

    相关文章推荐

    • PHP高级特性:反射与工厂设计模式如何结合使用• PHP常用六大设计模式(总结分享)• 详解PHP八大设计模式• Laravel中怎么实现Repository设计模式• 深入聊聊设计模式利器之“职责链模式”(附go实现流程)
    1/1

    PHP中文网