public function get_student_test_queue($task_set_id, $student_id)
{
$task_set = new Task_set();
$task_set->get_by_id((int) $task_set_id);
$student = new Student();
$student->get_by_id((int) $student_id);
$test_queue = new Test_queue();
if ($task_set->exists() && $student->exists()) {
$max_allowed_to_enqueue = (int) $this->config->item('test_maximum_enqueued_pe_student');
if ($max_allowed_to_enqueue <= 0) {
$max_allowed_to_enqueue = 1;
}
$test_status_0 = new Test();
$test_status_0->select_func('COUNT', array('@id'), 'tests_count');
$test_status_0->where_related('test_queue', 'id', '${parent}.id');
$test_queue_status_0 = new Test_queue();
$test_queue_status_0->select('*');
$test_queue_status_0->select_subquery($test_status_0, 'tests_count');
$test_queue_status_0->where_related($task_set);
$test_queue_status_0->where_related($student);
$test_queue_status_0->where('status', 0);
$test_queue_status_0->order_by('status', 'desc');
$test_queue_status_0->order_by('finish', 'desc');
$test_queue_status_0->order_by('start', 'asc');
$test_status_1 = new Test();
$test_status_1->select_func('COUNT', array('@id'), 'tests_count');
$test_status_1->where_related('test_queue', 'id', '${parent}.id');
$test_queue_status_1 = new Test_queue();
$test_queue_status_1->select('*');
$test_queue_status_1->select_subquery($test_status_1, 'tests_count');
$test_queue_status_1->where_related($task_set);
$test_queue_status_1->where_related($student);
$test_queue_status_1->where('status', 1);
$test_queue_status_1->order_by('status', 'desc');
$test_queue_status_1->order_by('finish', 'desc');
$test_queue_status_1->order_by('start', 'asc');
$test_status_2 = new Test();
$test_status_2->select_func('COUNT', array('@id'), 'tests_count');
$test_status_2->where_related('test_queue', 'id', '${parent}.id');
$test_queue_status_2 = new Test_queue();
$test_queue_status_2->select('*');
$test_queue_status_2->select_subquery($test_status_2, 'tests_count');
$test_queue_status_2->where_related($task_set);
$test_queue_status_2->where_related($student);
$test_queue_status_2->where('status', 2);
$test_queue_status_2->order_by('status', 'desc');
$test_queue_status_2->order_by('finish', 'desc');
$test_queue_status_2->order_by('start', 'asc');
$test_queue_status_2->limit($max_allowed_to_enqueue * 2);
$test_status_3 = new Test();
$test_status_3->select_func('COUNT', array('@id'), 'tests_count');
$test_status_3->where_related('test_queue', 'id', '${parent}.id');
$test_queue_status_3 = new Test_queue();
$test_queue_status_3->select('*');
$test_queue_status_3->select_subquery($test_status_3, 'tests_count');
$test_queue_status_3->where_related($task_set);
$test_queue_status_3->where_related($student);
$test_queue_status_3->where('status', 3);
$test_queue_status_3->order_by('status', 'desc');
$test_queue_status_3->order_by('finish', 'desc');
$test_queue_status_3->order_by('start', 'asc');
$test_queue_status_3->limit($max_allowed_to_enqueue * 2);
$test_queue_status_0->union_iterated(array($test_queue_status_1, $test_queue_status_2, $test_queue_status_3));
$test_queue = $test_queue_status_0;
}
//$test_queue->check_last_query();
$this->load->helper('tests');
$test_types = get_all_supported_test_types();
$this->parser->parse('backend/tests/get_student_test_queue.tpl', array('test_queue' => $test_queue, 'task_set' => $task_set, 'student' => $student, 'test_types' => $test_types));
}
public function aging()
{
$max_ticks = (int) $this->config->item('test_aging_ticks_to_priority_increase');
$max_raising = (int) $this->config->item('test_aging_max_tests_to_raise_priority');
$max_lifetime = (int) $this->config->item('test_queue_done_error_lifetime');
$max_lifetime = $max_lifetime < 60 ? 60 : $max_lifetime;
$old_test_queue = new Test_queue();
$old_test_queue->where('status >=', 2);
$old_test_queue->where('finish + INTERVAL ' . $max_lifetime . ' MINUTE < NOW()', NULL, TRUE);
$old_test_queue->get();
$old_test_queue->delete_all();
if ($max_ticks < 10) {
$max_ticks = 10;
}
if ($max_raising <= 0) {
$max_raising = 1;
}
$this->db->query('SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;');
$this->db->trans_start();
$tests_queue = new Test_queue();
$tests_queue->distinct();
$tests_queue->select('priority');
$tests_queue->order_by('priority', 'asc');
$tests_queue->where('status', 0);
$tests_queue->where('worker', NULL);
$tests_queue->get_iterated();
$priorities = array();
foreach ($tests_queue as $test_queue) {
$priorities[] = (int) $test_queue->priority;
}
if (count($priorities) >= 2) {
unset($priorities[0]);
foreach ($priorities as $priority) {
if ($priority <= 1) {
continue;
}
$tests_with_max_ticks = new Test_queue();
$tests_with_max_ticks->where('age >=', $max_ticks);
$tests_with_max_ticks->where('status', 0);
$tests_with_max_ticks->where('worker', NULL);
$tests_with_max_ticks->where('priority', $priority);
$tests_with_max_ticks->order_by('start', 'asc');
$tests_with_max_ticks->limit($max_raising);
$tests_with_max_ticks->get_iterated();
if ($tests_with_max_ticks->exists()) {
foreach ($tests_with_max_ticks as $test_with_max_ticks) {
$test_with_max_ticks->priority = $priority - 1;
$test_with_max_ticks->age = 0;
$test_with_max_ticks->save();
}
$tests_queue_with_priority = new Test_queue();
$tests_queue_with_priority->where('status', 0);
$tests_queue_with_priority->where('worker', NULL);
$tests_queue_with_priority->where('priority', $priority);
$tests_queue_with_priority->update('age', '0', FALSE);
continue;
}
$tests_queue_with_priority = new Test_queue();
$tests_queue_with_priority->where('status', 0);
$tests_queue_with_priority->where('worker', NULL);
$tests_queue_with_priority->where('priority', $priority);
$tests_queue_with_priority->update('age', 'age + 1', FALSE);
}
}
$this->db->trans_complete();
}