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<?php namespace Comodojo\Daemon; |
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use \Comodojo\Daemon\Events\PosixEvent; |
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use \Comodojo\Daemon\Utils\ProcessTools; |
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use \Comodojo\Daemon\Utils\Checks; |
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use \Comodojo\Daemon\Utils\PosixSignals; |
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use \Comodojo\Daemon\Traits\PidTrait; |
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use \Comodojo\Daemon\Traits\SignalsTrait; |
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use \Comodojo\Foundation\Events\Manager as EventsManager; |
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use \Comodojo\Foundation\Events\EventsTrait; |
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use \Comodojo\Foundation\Logging\Manager as LogManager; |
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use \Comodojo\Foundation\Logging\LoggerTrait; |
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use \Psr\Log\LoggerInterface; |
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use \RuntimeException; |
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use \Exception; |
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/** |
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* @package Comodojo Daemon |
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* @author Marco Giovinazzi <[email protected]> |
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* @license MIT |
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* |
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* LICENSE: |
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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 |
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* THE SOFTWARE. |
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*/ |
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abstract class Process { |
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use PidTrait; |
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use EventsTrait; |
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use LoggerTrait; |
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use SignalsTrait; |
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/** |
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* Build the process |
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* |
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* @param int $niceness |
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* @param LoggerInterface $logger; |
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* @param EventsManager $events; |
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*/ |
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public function __construct($niceness = null, LoggerInterface $logger = null, EventsManager $events = null) { |
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if ( !Checks::cli() ) { |
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throw new RuntimeException("Process can run only in cli SAPI"); |
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} |
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if ( !Checks::signals() ) { |
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throw new Exception("Missing pcntl signaling"); |
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} |
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$this->logger = is_null($logger) ? LogManager::create('daemon', false)->getLogger() : $logger; |
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$this->events = is_null($events) ? EventsManager::create($this->logger) : $events; |
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// get current PID |
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$this->pid = ProcessTools::getPid(); |
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if ( ProcessTools::setNiceness($niceness) === false ) { |
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$this->logger->warning("Unable to set process niceness to $niceness"); |
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} |
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// register signals |
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$this->signals = new PosixSignals(); |
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$this->signals->any()->call(array($this, 'signalToEvent')); |
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} |
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/** |
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* The generic signal handler. |
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* |
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* It transforms a signal into framework catchable event. |
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* |
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* @param int $signal |
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* @return self |
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*/ |
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public function signalToEvent($signal) { |
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if ( $this->pid == ProcessTools::getPid() ) { |
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$signame = $this->signals->signame($signal); |
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$this->logger->debug("Received $signame ($signal) signal, firing associated event(s)"); |
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$this->events->emit(new PosixEvent($signal, $this)); |
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$this->events->emit(new PosixEvent($signame, $this)); |
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} |
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return $this; |
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} |
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/** |
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* Stop current process execution. |
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* |
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* @param integer $return_code |
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*/ |
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public function end($return_code) { |
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exit($return_code); |
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} |
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} |
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comodojo /
daemon
In general, usage of exit should be done with care and only when running in a scripting context like a CLI script.