src/SAREhub/Component/Worker/Service/ServiceSupport.php
<?php
namespace SAREhub\Component\Worker\Service;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;
abstract class ServiceSupport implements Service {
/**
* @var LoggerInterface
*/
private $logger;
private $started = false;
private $stopped = true;
/**
* Executed for start service.
* @throws \Exception When something was wrong.
*/
public function start() {
if (!$this->isStarted()) {
$this->getLogger()->info('service starting ...');
$this->doStart();
$this->started = true;
$this->stopped = false;
$this->getLogger()->info('service started');
}
}
/**
* Executed on every service tick.
* @throws \Exception When something was wrong.
*/
public function tick() {
try {
if ($this->isRunning()) {
$this->doTick();
}
} catch (\Exception $e) {
try {
$this->stop();
} catch (\Exception $e2) {
// we wants only orginal exception
}
throw $e;
}
}
/**
* Executed for stop service
* @throws \Exception When something was wrong.
*/
public function stop() {
if ($this->isStarted()) {
try {
$this->getLogger()->info('service stopping ...');
$this->doStop();
} finally {
$this->started = false;
$this->stopped = true;
$this->getLogger()->info('service stopped');
}
}
}
/**
* @return boolean
*/
public function isStarted() {
return $this->started;
}
/**
* @return boolean
*/
public function isStopped() {
return $this->stopped;
}
/**
* @return boolean
*/
public function isRunning() {
return $this->started;
}
/**
* Gets logger assigned to that object.
* @return LoggerInterface
*/
public function getLogger() {
if ($this->logger === null) {
$this->logger = new NullLogger();
}
return $this->logger;
}
public function setLogger(LoggerInterface $logger) {
if ($this->getLogger() === $logger) {
throw new \LogicException('set same logger instance');
}
$this->logger = $logger;
}
/**
* Contains custom worker start logic
* @throws \Exception When something was wrong.
*/
protected function doStart() {
}
/**
* Contains custom worker tick logic
* @throws \Exception When something was wrong.
*/
protected function doTick() {
}
/**
* Contains custom worker stop logic
* @throws \Exception When something was wrong.
*/
protected function doStop() {
}
}