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