/**
* Executes the command cron:run.
*
* Tries to acquire the cron lock, then if no argument has been given runs all ready cron tasks.
* If the cron lock can not be obtained, an error message is printed
* and the exit status is set to 1.
* If the verbose option is specified, each start of a task is printed.
* Otherwise there is no output.
* If an argument is given to the command, only the task whose name matches the
* argument will be started. If verbose option is specified,
* an info message containing the name of the task is printed.
* If no task matches the argument given, an error message is printed
* and the exit status is set to 2.
*
* @param InputInterface $input The input stream used to get the argument and verboe option.
* @param OutputInterface $output The output stream, used for printing verbose-mode and error information.
*
* @return int 0 if all is ok, 1 if a lock error occured and 2 if no task matching the argument was found.
*/
protected function execute(InputInterface $input, OutputInterface $output)
{
if ($this->lock_db->acquire()) {
$task_name = $input->getArgument('name');
if ($task_name) {
$exit_status = $this->run_one($input, $output, $task_name);
} else {
$exit_status = $this->run_all($input, $output);
}
$this->lock_db->release();
return $exit_status;
} else {
$output->writeln('<error>' . $this->user->lang('CRON_LOCK_ERROR') . '</error>');
return 1;
}
}
/**
* Acquires a lock on the item table
*
* @return bool True if the lock was acquired, false if it has been acquired previously
*
* @throws \RuntimeException If the lock could not be acquired
*/
protected function acquire_lock()
{
if ($this->lock->owns_lock()) {
return false;
}
if (!$this->lock->acquire()) {
throw new \RuntimeException($this->message_prefix . 'LOCK_FAILED_ACQUIRE');
}
return true;
}