Extbase: scheduler cannot load a class - scheduled-tasks

Question

I have a scheduler (extension "scheduler" 6.2.0) task class:
namespace MyVendor\MyExt\Scheduler;
class MultiStepProcessTask extends \TYPO3\CMS\Scheduler\Task\AbstractTask {
public function execute() {
$objectManager = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Extbase\\Object\\ObjectManager');
$businessLogic = $objectManager->get(\MyVendor\MyExt\Scheduler\MultiStepProcessTaskBusinessLogic::class);
return $businessLogic->run();
}
}
And a class implementing business logic for the scheduler task:
namespace MyVendor\MyExt\Scheduler;
class MultiStepProcessTaskBusinessLogic {
public function run() {
...
}
}
I created a scheduler task in BE. If I run it manually - it's OK. If it is started automatically - following error message comes:
[scheduler]: Task failed to execute successfully. Class:
MyVendor\MyExt\Scheduler\MultiStepProcessTask, UID: 8. Could not
analyse class:
MyVendor\MyExt\Scheduler\MultiStepProcessTaskBusinessLogic maybe not
loaded or no autoloader? (msg#4.0.255)
The best is - after being once run manually, the task runs automatically without errors until the cache is cleared. After that it needs one manual run again.
One more strange thing: in the main scheduler task class (MultiStepProcessTask) no injection is possible. That's why I had to create business logic object via objectManager

Answer 1

The best solution would be to write a command controller based on extbase. There you can use the ObjectManager and you can run it directly from CLI and of course also call it via scheduler!