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<?php |
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/* |
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* To change this license header, choose License Headers in Project Properties. |
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* To change this template file, choose Tools | Templates |
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* and open the template in the editor. |
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*/ |
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namespace TMSolution\CronBundle\Command; |
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use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand; |
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use Symfony\Component\Console\Input\InputInterface; |
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use Symfony\Component\Console\Output\OutputInterface; |
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use Symfony\Component\Console\Input\StringInput; |
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class CronTaskRunCommand extends ContainerAwareCommand |
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{ |
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const EXEC_CLI = 1; |
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const EXEC_SYMFONYCLI = 2; |
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const EXEC_REST = 3; |
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const EXEC_SYMFONYSERVICE = 4; |
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private $output; |
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private $em; |
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protected function configure() |
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{ |
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$this |
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->setName('crontasks:run') |
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->setDescription('Runs Cron Tasks if needed') |
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; |
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} |
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private function getEntityManager() |
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{ |
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return $this->getContainer()->get('doctrine.orm.entity_manager'); |
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} |
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protected function execute(InputInterface $input, OutputInterface $output) |
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{ |
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//$output->writeln('<comment>Running Cron Tasks...</comment>'); |
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$this->output = $output; |
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$this->em = $this->getEntityManager(); |
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// $i = 0; |
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while (true) { |
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try { |
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$crontasks = $this->em->getRepository('TMSolutionCronBundle:CronTask')->getNewTasks(20); |
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foreach($crontasks as $crontask) { |
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if ($crontask) { |
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$this->runCronTask($crontask, $output); |
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$this->em->flush(); |
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} |
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} |
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//$i++; |
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} catch (\Exception $e) { |
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echo "Błąd crona."; |
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} |
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sleep(10); |
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} |
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$output->writeln('<comment>Done!</comment>'); |
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} |
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private function runCronTask($crontask, OutputInterface $output) |
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{ |
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$output->writeln(sprintf('Running Cron Task <info>%s</info>', $crontask->getName())); |
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$crontask->setRunDate(new \DateTime()); |
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$commands = $crontask->getCommands(); |
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$crontask->setUsed(1); |
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$this->em->persist($crontask); |
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try { |
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$this->executeCommands($commands, $crontask->getExecType(), $output); |
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$output->writeln('<info>SUCCESS</info>'); |
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$crontask->setSuccess(1); |
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} catch (\Exception $e) { |
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$output->writeln(sprintf('<error>ERROR</error><comment>%s</comment>', $e->getMessage())); |
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$crontask->setSuccess(0); |
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} |
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$this->em->persist($crontask); |
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} |
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private function executeCommands($commands, $execType, OutputInterface $output) |
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{ |
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foreach ($commands as $command) { |
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$output->writeln(sprintf('Executing command <comment>%s</comment>...', $command)); |
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if ($execType == self::EXEC_SYMFONYCLI) { |
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return $this->runSymfonyCliCommand($command); |
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} elseif ($execType == self::EXEC_CLI) { |
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return $this->runCliCommand($command); |
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} elseif ($execType == self::EXEC_REST) { |
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return $this->runRestCommand($command); |
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} |
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} |
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} |
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private function runSymfonyCliCommand($string) |
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{ |
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$namespace = explode(' ', $string)[0]; |
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$command = $this->getApplication()->find($namespace); |
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$input = new StringInput($string); |
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$returnCode = $command->run($input, $this->output); |
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return $returnCode != 0; |
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} |
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private function runCliCommand($command) |
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{ |
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$command = 'nohup ' . $command . ' > /dev/null 2>&1 & echo $!'; |
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$op = []; |
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exec($command, $op); |
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if (!isset($op[0])) { |
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throw new \Exception; |
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} else { |
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return true; |
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} |
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} |
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private function runRestCommand($command) |
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{ |
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//next example will recieve all messages for specific conversation |
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$service_url = 'http://localhost/owca/web/app_dev.php/dummy'; |
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$curl = curl_init($service_url); |
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curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); |
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$curl_response = curl_exec($curl); |
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if ($curl_response === false) { |
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$info = curl_getinfo($curl); |
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curl_close($curl); |
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throw new \Exception('error occured during curl exec. Additinal info: ' . var_export($info)); |
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} |
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curl_close($curl); |
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$decoded = json_decode($curl_response); |
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var_dump($decoded); |
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exit; |
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if (isset($decoded->response->status) && $decoded->response->status == 'ERROR') { |
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throw new \Exception('error occured: ' . $decoded->response->errormessage); |
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} |
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return true; |
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echo 'response ok!'; |
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var_export($decoded->response); |
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} |
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} |
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This error can happen if you refactor code and forget to move the variable initialization.
Let’s take a look at a simple example:
The above code is perfectly fine. Now imagine that we re-order the statements:
In that case,
$xwould be read before it is initialized. This was a very basic example, however the principle is the same for the found issue.