public function runScheduledTasks()
{
ServiceState::UpdateLastIterationTime();
if (!count($this->m_tasks)) {
return;
}
$currentTime = time();
$executionCount = 0;
// Gather the last execution time for each task, and sort the task in a descending
// order prioritizing the tasks which are longest overdue.
foreach ($this->m_tasks as $index => $task) {
$this->m_tasks[$index]['last_execution'] = ServiceState::GetLastExecutionTime($task);
}
usort($this->m_tasks, function ($left, $right) use($currentTime) {
$leftOverdue = $currentTime - $left['last_execution'] - $left['interval'];
$rightOverdue = $currentTime - $right['last_execution'] - $right['interval'];
return $leftOverdue > $rightOverdue ? -1 : 1;
});
// Now execute the tasks which are overdue. We process a maximum of |MaximumTasksToExecute|
// per iteration, running new tasks as long as |MaximumTimeToExecute| doesn't get hit.
foreach ($this->m_tasks as $task) {
if ($currentTime - $task['last_execution'] - $task['interval'] < 0) {
return;
}
if ($executionCount++ > self::MaximumTasksToExecute || time() - $currentTime > self::MaximumTimeToExecute) {
return;
}
$this->runTask($task);
}
}
