Script plugin for testing PocketMine async worker init closures.

TestAsyncPoolInitClosures.php

<?php

/**
 * @name TestAsyncPoolInitClosures
 * @main jacknoordhuis\test\TestAsyncPoolInitClosures
 * @version 1.0.0
 * @api 4.0.0
 * @author Jack Noordhuis
 */

declare(strict_types=1);

namespace jacknoordhuis\test {

	use GlobalLogger;
	use pocketmine\event\Listener;
	use pocketmine\plugin\PluginBase;

	class TestAsyncPoolInitClosures extends PluginBase implements Listener {
		protected function onEnable() {
			// will log the message to any existing workers
			$this->getServer()->getAsyncPool()->addWorkerInitHook($closure = function() : void {
				/** @var $this \pocketmine\scheduler\AsyncTask */
				GlobalLogger::get()->info("async worker init closure");
			});
			// the message will not be logged on any new workers
			$this->getServer()->getAsyncPool()->removeWorkerInitHook($closure);
		}
	}
}