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<?php |
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namespace KIVagant\RunOnce; |
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use Liip\ProcessManager\LockException; |
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use Liip\ProcessManager\ProcessManager; |
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use Liip\ProcessManager\PidFile; |
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class RunOnce |
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{ |
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protected $debug = false; |
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protected $arguments = []; |
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/** |
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* @var ProcessManager |
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*/ |
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private $processManager; |
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/** |
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* @var PidFile |
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*/ |
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private $pidFile; |
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public function __construct(ProcessManager $processManager, $argv) |
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{ |
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$this->processManager = $processManager; |
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$this->readArguments($argv); |
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$pidFile = $this->pidFileFactory($processManager); |
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$this->pidFile = $pidFile; |
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} |
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public function __invoke() |
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{ |
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try { |
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$this->acquireLock(); |
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$this->execCommand(); |
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} catch (RuntimeException $e) { |
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$this->releaseLock(); |
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echo $e->getMessage(), PHP_EOL; |
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return false; |
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} catch (LockException $e) { |
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$locker = $this->pidFile->getPid(); |
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if ($this->processManager->isProcessRunning($locker)) { |
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$this->debug('Command was already executed with PID ', $locker); |
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return false; |
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} |
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$this->debug($locker . ' lock released'); |
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$this->releaseLock(); |
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$this->acquireLock(); |
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$this->execCommand(); |
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} |
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return true; |
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} |
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protected function readArguments($argv) |
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{ |
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$this->arguments = $argv; |
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unset($this->arguments[0]); |
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if (array_key_exists(1, $this->arguments) && $this->arguments[1] === '-v') { |
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$this->debug = true; |
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unset($this->arguments[1]); |
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} |
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return $this->arguments; |
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} |
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protected function acquireLock() |
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{ |
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$this->pidFile->acquireLock(); |
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} |
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protected function releaseLock() |
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{ |
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$this->pidFile->acquireLock(); |
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} |
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protected function execCommand() |
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{ |
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$command = implode(' ', $this->arguments); |
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if (empty($command)) { |
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throw new RuntimeException('You need to set a command as the argument to this tool'); |
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} |
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$this->debug($command); |
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$runningPid = $this->pidFile->execProcess($command); |
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$this->pidFile->setPid($runningPid); |
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$this->debug($runningPid, ' is executed and locked'); |
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} |
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protected function debug() |
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{ |
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if ($this->debug) { |
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echo implode(' ', func_get_args()), PHP_EOL; |
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} |
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} |
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protected function pidFileFactory(ProcessManager $processManager) |
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{ |
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$argsHash = md5(implode(' ', $this->arguments)); |
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$pidFile = new PidFile($processManager, PID_DIR . PID_FILE . '.' . $argsHash . '.pid'); |
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return $pidFile; |
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} |
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} |
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KIVagant /
runonce
