function listAction()
{
$config = getConfig();
$columnsName = [];
foreach ($_GET['columns'] as $column) {
if (!empty($column['data'])) {
$columnsName[] = $column['data'];
}
}
$order = $_GET['order'][0];
$orderColumn = $order['column'];
$start = intval($_GET['start']);
$sqlAssoc = ['table' => ['name' => 'item', 'dbname' => 'db_vktest', 'as' => 'i'], 'query' => ['select' => $columnsName, 'from' => 'item', 'order' => ['column' => $columnsName[$orderColumn], 'dir' => $order['dir']], 'start' => $start, 'length' => $_GET['length']]];
$mysqli = db_mysqli_connect($sqlAssoc['table']['dbname']);
$rowStore = db_mysqli_query_fetch_store($mysqli, 'SELECT s.countitems FROM store AS s WHERE s.idstore = 1', MYSQLI_ASSOC)[0];
$sqlQueryes = buildListItemQuery($sqlAssoc, $rowStore['countitems']);
$rows = db_mysqli_query_fetch_list($mysqli, $sqlQueryes, MYSQLI_ASSOC);
db_mysqli_close($mysqli);
// var_dump($_SESSION);
// var_dump($sqlQueryes);
$_SESSION['list'] = ['lastitem' => $rows[count($rows) - 1], 'firstitem' => $rows[0], 'lastpage' => $start, 'slowQueryType' => $sqlQueryes['slowQueryType']];
//for cahce before last result
afterLictAction($sqlAssoc, $rowStore);
$response = ['recordsTotal' => $rowStore['countitems'], 'recordsFiltered' => $rowStore['countitems'], 'data' => $rows, 'draw' => $_GET['draw'], 'start' => $_GET['start']];
echo json_encode($response);
}
function afterLictAction($queryAssoc, $rowStore)
{
$config = getConfig();
/**
* Count of items page,that need be cached,because
* but last-1/-2/-3/-4 use slow query
*/
$COUNT_BEFORE_END = 5;
$length = $queryAssoc['query']['length'];
$itemsLast = $rowStore['countitems'] % $length;
$lastPage = $rowStore['countitems'] - $itemsLast;
$start = $queryAssoc['query']['start'];
/**
* only for last page
*/
if ($start == $lastPage) {
//last 5 page in cache&
$queryCheckPre = array_merge($queryAssoc, []);
$queryCheckPre['query']['start'] = $start - 1 * $length;
$queryPre = buildListItemQuery($queryCheckPre, $rowStore['countitems']);
$params = $config['memcache'];
$memcache = memcache_connect($params['host'], $params['port']);
$memcacheQueryKey = 'QUERY' . $queryPre['slow'];
$data = memcache_get($memcache, $memcacheQueryKey);
memcache_close($memcache);
//another proc
if (empty($data)) {
$pid = pcntl_fork();
if ($pid == 0) {
$mysqli = db_mysqli_connect($queryAssoc['table']['dbname']);
for ($i = 1; $i < $COUNT_BEFORE_END; $i++) {
$queryAssoc['query']['start'] = $start - $i * $length;
$sqlQueryes = buildListItemQuery($queryAssoc, $rowStore['countitems']);
$rows = db_mysqli_query_fetch_list($mysqli, $sqlQueryes, MYSQLI_ASSOC);
$_SESSION['list'] = ['lastitem' => $rows[count($rows) - 1], 'firstitem' => $rows[0], 'lastpage' => $queryAssoc['query']['start'], 'slowQueryType' => $sqlQueryes['slowQueryType']];
//
usleep(500);
}
db_mysqli_close($mysqli);
exit(0);
//end new proc
}
}
}
}
