156 lines
5.1 KiB
PHP
156 lines
5.1 KiB
PHP
<?php
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/**
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* FuzeWorks Async Library
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*
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* The FuzeWorks PHP FrameWork
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*
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* Copyright (C) 2013-2020 TechFuze
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* @author TechFuze
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* @copyright Copyright (c) 2013 - 2020, TechFuze. (http://techfuze.net)
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* @license https://opensource.org/licenses/MIT MIT License
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*
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* @link http://techfuze.net/fuzeworks
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* @since Version 1.0.0
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*
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* @version Version 1.0.0
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*/
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namespace FuzeWorks\Async\Executors;
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use FuzeWorks\Async\Executor;
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use FuzeWorks\Async\Process;
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use FuzeWorks\Async\Task;
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use FuzeWorks\Async\TasksException;
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class ShellExecutor implements Executor
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{
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private $binary;
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private $worker;
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private $bootstrapFile;
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private $stdout = "> /dev/null";
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private $stderr = "2> /dev/null";
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/**
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* ShellExecutor constructor.
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*
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* @param string $bootstrapFile
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* @param array $parameters
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* @throws TasksException
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*/
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public function __construct(string $bootstrapFile, array $parameters)
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{
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// Fetch workerFile
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$workerFile = $parameters['workerFile'];
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// First determine the PHP binary
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$this->binary = PHP_BINDIR . DS . 'php';
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$this->bootstrapFile = $bootstrapFile;
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if (!file_exists($workerFile))
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throw new TasksException("Could not construct ShellExecutor. ShellWorker script does not exist.");
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$this->worker = $workerFile;
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}
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private function shellExec($format, array $parameters = [])
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{
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$parameters = array_map("escapeshellarg", $parameters);
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array_unshift($parameters, $format);
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$command = call_user_func_array("sprintf", $parameters);
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exec($command, $output);
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return $output;
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}
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public function startTask(Task $task, bool $post = false): Task
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{
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// First prepare the command used to spawn workers
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$commandString = "$this->binary $this->worker --bootstrap=".$this->bootstrapFile." -t %s ".($post ? '-p' : '')." $this->stdout $this->stderr & echo $!";
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// Then execute the command using the base64_encoded string of the taskID
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$output = $this->shellExec($commandString, [base64_encode($task->getId())]);
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$pid = intval($output[0]);
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$task->setProcess(new Process($pid));
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// And finally return the task
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return $task;
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}
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public function stopTask(Task $task): Task
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{
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// TODO: Implement stopTask() method.
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}
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public function getTaskRunning(Task $task): bool
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{
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$stats = $this->getTaskStats($task);
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return !is_null($stats);
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}
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public function getTaskStats(Task $task): ?array
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{
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// First prepare the command used to gather info on processes
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$commandString = "ps -o pid,%%cpu,%%mem,state,start -p %s | sed 1d";
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// First we must determine what process is used.
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$process = $task->getProcess();
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if (is_null($process))
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return null;
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// Then using that process we determine the ProcessID
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$pid = $process->getPid();
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// And we execute the commandString to fetch info on the process
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$output = $this->shellExec($commandString, [$pid]);
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// If not output is provided, the command failed and should return null
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if (count($output) < 1)
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return null;
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// ??
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$last = $output[count($output) - 1];
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if (trim($last) === "")
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return null;
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// Split up the info
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$parts = preg_split("/\s+/", trim($last));
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// Determine the state of the process
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// If the process is in a 'zombie' state, it should be considered fully executed.
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// Cleanup of Zombie processes must take place by periodically restarting the SuperVisor, or by using a SuperVisor which does not have the zombie problem
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$state = strtoupper(trim($parts[3]));
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if ("{$pid}" !== $parts[0] || $state === 'Z')
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return null;
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// Finally, return the Task information
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return $parts;
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}
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public function getTaskExitCode(Task $task): int
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{
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// TODO: Implement getTaskExitCode() method.
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}
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public function getRunningTasks(): array
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{
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// TODO: Implement getRunningTasks() method.
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}
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} |