The worker is split into several classes

src/Core/Worker/Daemon.php

@@ -0,0 +1,137 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Core\Worker;
+
+use Friendica\App\Mode;
+use Friendica\Core\Logger;
+use Friendica\DI;
+
+/**
+ * Contains the class for the worker background job processing
+ */
+class Daemon
+{
+	private static $daemon_mode = null;
+
+	/**
+	 * Checks if the worker is running in the daemon mode.
+	 *
+	 * @return boolean
+	 */
+	public static function isMode()
+	{
+		if (!is_null(self::$daemon_mode)) {
+			return self::$daemon_mode;
+		}
+
+		if (DI::mode()->getExecutor() == Mode::DAEMON) {
+			return true;
+		}
+
+		$daemon_mode = DI::config()->get('system', 'worker_daemon_mode', false, true);
+		if ($daemon_mode) {
+			return $daemon_mode;
+		}
+
+		if (!function_exists('pcntl_fork')) {
+			self::$daemon_mode = false;
+			return false;
+		}
+
+		$pidfile = DI::config()->get('system', 'pidfile');
+		if (empty($pidfile)) {
+			// No pid file, no daemon
+			self::$daemon_mode = false;
+			return false;
+		}
+
+		if (!is_readable($pidfile)) {
+			// No pid file. We assume that the daemon had been intentionally stopped.
+			self::$daemon_mode = false;
+			return false;
+		}
+
+		$pid = intval(file_get_contents($pidfile));
+		$running = posix_kill($pid, 0);
+
+		self::$daemon_mode = $running;
+		return $running;
+	}
+
+	/**
+	 * Test if the daemon is running. If not, it will be started
+	 *
+	 * @return void
+	 */
+	public static function checkState()
+	{
+		if (!DI::config()->get('system', 'daemon_watchdog', false)) {
+			return;
+		}
+
+		if (!DI::mode()->isNormal()) {
+			return;
+		}
+
+		// Check every minute if the daemon is running
+		if (DI::config()->get('system', 'last_daemon_check', 0) + 60 > time()) {
+			return;
+		}
+
+		DI::config()->set('system', 'last_daemon_check', time());
+
+		$pidfile = DI::config()->get('system', 'pidfile');
+		if (empty($pidfile)) {
+			// No pid file, no daemon
+			return;
+		}
+
+		if (!is_readable($pidfile)) {
+			// No pid file. We assume that the daemon had been intentionally stopped.
+			return;
+		}
+
+		$pid = intval(file_get_contents($pidfile));
+		if (posix_kill($pid, 0)) {
+			Logger::info('Daemon process is running', ['pid' => $pid]);
+			return;
+		}
+
+		Logger::warning('Daemon process is not running', ['pid' => $pid]);
+
+		self::spawn();
+	}
+
+	/**
+	 * Spawn a new daemon process
+	 *
+	 * @return void
+	 */
+	private static function spawn()
+	{
+		Logger::notice('Starting new daemon process');
+		$command = 'bin/daemon.php';
+		$a = DI::app();
+		DI::system()->run($command, ['start']);
+		Logger::notice('New daemon process started');
+	}
+}