/**
* Returns a random dbid from the specified dbtype pool, or pools
*
* @param mixed $db_type could either be on specific type as in most use cases, or multiple parameters each denoting a type
* @return int
* @author mcslee
*/
function get_rand_db($db_type)
{
if (func_num_args() > 1) {
$args = func_get_args();
$sizes = array();
$total = 0;
global $DBTYPE_CONFIG;
foreach ($args as $index => $db_pool_type) {
if (!isset($DBTYPE_CONFIG[$db_pool_type])) {
debug_rlog('FBID: invalid dbtype to get_rand_db: ' . $db_pool_type);
return null;
}
$total += $DBTYPE_CONFIG[$db_pool_type]['count'];
$sizes[$db_pool_type] = $total;
}
$index = mt_rand(1, $total);
foreach ($sizes as $pool => $size) {
if ($index <= $size) {
$db_type = $pool;
break;
}
}
}
if (!isset($DBTYPE_CONFIG[$db_type])) {
debug_rlog('FBID: invalid dbtype to get_rand_db: ' . $db_type);
return null;
}
$config = $DBTYPE_CONFIG[$db_type];
$min = $config['min_dbid'];
$max = $config['max_dbid'];
for ($i = 0; $i < 10; ++$i) {
$dbid = mt_rand($min, $max);
if (!check_down($dbid)) {
break;
// exit the loop if this connection is good
}
}
// On QA DB, only use 1 out of 100 object DBs
if (is_qa_server()) {
$dbid = 100 * (int) ($dbid / 100);
}
return $dbid;
}
<?php debug_rlog(1 + 2, 0); debug_rlog(1 + 2, 1);
