Easyswoole源码分析-2-CommandRunner

1. 分析CommandRunner类

分析CommandRunner，主要关注Singleton 组合、CommandContainer、Core类

2. 知识点

1.new static()和new self()的区别2.get_called_class()函数与get_class()函数的区别3.Trait详解及其应用4.Hook

3.Singleton组合

核心代码

trait Singleton { private static $instance; static function getInstance(...$args) { if(!isset(self::$instance)){ self::$instance = new static(...$args); } return self::$instance; } }

根据上面代码可以当执行easyswoole入口文件$ret = CommandRunner::getInstance()->run($args);的时候、首先CommandRunner::getINstance() 获取CommandRunner 对象，进而执行此对象的run方法。

4.CommandContainer 类

核心代码

class CommandContainer { // 每个类都引入了此Trait，目的是为了获取当前对象 use Singleton; // 用于存储注入的对象们 private $container = []; // 注入对象 public function set(CommandInterface $command) { $this->container[strtolower($command->commandName())] = $command; } // 获取对象 function get($key): ?CommandInterface { $key = strtolower($key); if (isset($this->container[$key])) { return $this->container[$key]; } else { return null; } } // 获取对象列表 function getCommandList() { return array_keys($this->container); } // 执行某一command对象中的exec方法 function hook($commandName, array $args):?string { $handler = $this->get($commandName); if($handler){ return $handler->exec($args); } return null; } }

通过此类可以将command相关的对象注入到container变量中

5.Core (核心)类

核心代码

class Core { use Singleton; private $isDev = true; // 初始化一些常量 function __construct() { defined('SWOOLE_VERSION') or define('SWOOLE_VERSION',intval(phpversion('swoole'))); defined('IN_PHAR') or define('IN_PHAR', boolval(\Phar::running(false))); defined('RUNNING_ROOT') or define('RUNNING_ROOT', realpath(getcwd())); defined('EASYSWOOLE_ROOT') or define('EASYSWOOLE_ROOT', IN_PHAR ? \Phar::running() : realpath(getcwd())); defined('EASYSWOOLE_SERVER') or define('EASYSWOOLE_SERVER',1); defined('EASYSWOOLE_WEB_SERVER') or define('EASYSWOOLE_WEB_SERVER',2); defined('EASYSWOOLE_WEB_SOCKET_SERVER') or define('EASYSWOOLE_WEB_SOCKET_SERVER',3); } // 设置是否加载dev配置文件 function setIsDev(bool $isDev) { $this->isDev = $isDev; return $this; } function initialize() { //检查全局文件是否存在. $file = EASYSWOOLE_ROOT . '/EasySwooleEvent.php'; if(file_exists($file)){ require_once $file; try{ $ref = new \ReflectionClass('EasySwoole\EasySwoole\EasySwooleEvent'); if(!$ref->implementsInterface(Event::class)){ die('global file for EasySwooleEvent is not compatible for EasySwoole\EasySwoole\EasySwooleEvent'); } unset($ref); }catch (\Throwable $throwable){ die($throwable->getMessage()); } }else{ die('global event file missing'); } //先加载配置文件dev和produce两种 $this->loadEnv(); //执行框架初始化事件、主要初始化了时区 EasySwooleEvent::initialize(); //临时文件和Log目录初始化 $this->sysDirectoryInit(); //注册错误回调 $this->registerErrorHandler(); return $this; } }

此类目前在CommandRunner类中主要作用就是初始化一些必要信息

6.CommandRunner类

了解了以上信息后，接下来介绍CommandRunner核心代码

class CommandRunner { use Singleton; // 注入处理相应命令的对象 function __construct() { CommandContainer::getInstance()->set(new Help()); CommandContainer::getInstance()->set(new Install()); CommandContainer::getInstance()->set(new Start()); CommandContainer::getInstance()->set(new Stop()); CommandContainer::getInstance()->set(new Reload()); CommandContainer::getInstance()->set(new Console()); CommandContainer::getInstance()->set(new Phar()); } // 根据启动命令执行相应的对象方法 function run(array $args):?string { $command = array_shift($args); if(empty($command)){ $command = 'help'; }else if($command != 'install'){ //预先加载配置 if(in_array('produce',$args)){ Core::getInstance()->setIsDev(false); } Core::getInstance()->initialize(); } if(!CommandContainer::getInstance()->get($command)){ $command = 'help'; } return CommandContainer::getInstance()->hook($command,$args); } }

此类完成的功能主要有1.注入Help、Install、Start、Stop、Reload、Console、Phar 对象 2.根据cli 指令信息看执行哪个对象中的exec方法、处理不同的业务。

后面会逐个分析Help、Install、Start、Stop、Reload、Console、Phar 类

7.相关地址

EasySwoole文档地址