热重启 · PHP/Python/前端/Linux 等等学习笔记

[TOC] > [参考](https://www.easyswoole.com/Cn/Other/hotReload.html) ## 使用 App/Process/HotReload.php ``` <?php /** * Created by PhpStorm. * User: evalor * Date: 2018-11-26 * Time: 23:18 */ namespace App\Process; use EasySwoole\Component\Process\AbstractProcess; use EasySwoole\EasySwoole\ServerManager; use EasySwoole\Utility\File; use Swoole\Process; use Swoole\Table; use Swoole\Timer; /** * 暴力热重载 * Class HotReload * @package App\Process */ class HotReload extends AbstractProcess { /** @var \swoole_table $table */ protected $table; protected $isReady = false; protected $monitorDir; // 需要监控的目录 protected $monitorExt; // 需要监控的后缀 /** * 启动定时器进行循环扫描 */ public function run($arg) { // 此处指定需要监视的目录建议只监视App目录下的文件变更 $this->monitorDir = !empty($arg['monitorDir']) ? $arg['monitorDir'] : EASYSWOOLE_ROOT . '/App'; // 指定需要监控的扩展名不属于指定类型的的文件无视变更不重启 $this->monitorExt = !empty($arg['monitorExt']) && is_array($arg['monitorExt']) ? $arg['monitorExt'] : ['php']; if (extension_loaded('inotify') && empty($arg['disableInotify'])) { // 扩展可用优先使用扩展进行处理 $this->registerInotifyEvent(); echo "server hot reload start : use inotify\n"; } else { // 扩展不可用时进行暴力扫描 $this->table = new Table(512); $this->table->column('mtime', Table::TYPE_INT, 4); $this->table->create(); $this->runComparison(); Timer::tick(1000, function () { $this->runComparison(); }); echo "server hot reload start : use timer tick comparison\n"; } } /** * 扫描文件变更 */ private function runComparison() { $startTime = microtime(true); $doReload = false; $dirIterator = new \RecursiveDirectoryIterator($this->monitorDir); $iterator = new \RecursiveIteratorIterator($dirIterator); $inodeList = array(); // 迭代目录全部文件进行检查 foreach ($iterator as $file) { /** @var \SplFileInfo $file */ $ext = $file->getExtension(); if (!in_array($ext, $this->monitorExt)) { continue; // 只检查指定类型 } else { // 由于修改文件名称并不需要重新载入可以基于inode进行监控 $inode = $file->getInode(); $mtime = $file->getMTime(); array_push($inodeList, $inode); if (!$this->table->exist($inode)) { // 新建文件或修改文件变更了inode $this->table->set($inode, ['mtime' => $mtime]); $doReload = true; } else { // 修改文件但未发生inode变更 $oldTime = $this->table->get($inode)['mtime']; if ($oldTime != $mtime) { $this->table->set($inode, ['mtime' => $mtime]); $doReload = true; } } } } foreach ($this->table as $inode => $value) { // 迭代table寻找需要删除的inode if (!in_array(intval($inode), $inodeList)) { $this->table->del($inode); $doReload = true; } } if ($doReload) { $count = $this->table->count(); $time = date('Y-m-d H:i:s'); $usage = round(microtime(true) - $startTime, 3); if (!$this->isReady == false) { // 监测到需要进行热重启 echo "severReload at {$time} use : {$usage} s total: {$count} files\n"; ServerManager::getInstance()->getSwooleServer()->reload(); } else { // 首次扫描不需要进行重启操作 echo "hot reload ready at {$time} use : {$usage} s total: {$count} files\n"; $this->isReady = true; } } } /** * 注册Inotify监听事件 */ private function registerInotifyEvent() { // 因为进程独立且当前是自定义进程全局变量只有该进程使用 // 在确定不会造成污染的情况下也可以合理使用全局变量 global $lastReloadTime; global $inotifyResource; $lastReloadTime = 0; $files = File::scanDirectory(EASYSWOOLE_ROOT . '/App'); $files = array_merge($files['files'], $files['dirs']); $inotifyResource = inotify_init(); // 为当前所有的目录和文件添加事件监听 foreach ($files as $item) { inotify_add_watch($inotifyResource, $item, IN_CREATE | IN_DELETE | IN_MODIFY); } // 加入事件循环 swoole_event_add($inotifyResource, function () { global $lastReloadTime; global $inotifyResource; $events = inotify_read($inotifyResource); if ($lastReloadTime < time() && !empty($events)) { // 限制1s内不能进行重复reload $lastReloadTime = time(); ServerManager::getInstance()->getSwooleServer()->reload(); } }); } public function onShutDown() { // TODO: Implement onShutDown() method. } public function onReceive(string $str) { // TODO: Implement onReceive() method. } } ``` 调用 ``` public static function mainServerCreate(EventRegister $register) { $swooleServer = ServerManager::getInstance()->getSwooleServer(); $swooleServer->addProcess((new HotReload('HotReload', ['disableInotify' => false]))->getProcess()); } ``` > 因为虚拟机中inotify无法监听到FTP/SFTP等文件上传的事件，将 disableInotify 设置为 true ，可以关闭inotify方式的热重启，使得虚拟机环境下，强制使用文件循环扫描来触发重载操作，同理 OSX 开发环境下，没有Inotify扩展，将自动使用扫描式重载