public static function get_db_host_roll($db_read_host_array, $db)
{
$key = md5(implode("_", array_keys($db_read_host_array) . implode(array_values($db_read_host_array))));
$cache_array = cls_shmop::readArray($key);
if ($cache_array) {
$host = array_shift($cache_array);
cls_shmop::writeArray($key, $cache_array);
} else {
$host_str = $db_read_host_array[$db];
if ($host_str) {
$host_array = explode(',', $host_str);
$read_host_list = self::get_read_host_list($host_array);
$host = array_shift($read_host_list);
cls_shmop::writeArray($key, $read_host_list);
} else {
$host = '';
}
}
return $host;
}
public function nextValue($logic_table)
{
$file = fopen(ROOT_PATH . 'includes/cls/' . $logic_table . '_seq.txt', "w+");
if (flock($file, LOCK_EX)) {
//独占锁
$value = 0;
$is_write = false;
for (;;) {
$new_array = cls_shmop::readArray($logic_table);
if ($new_array) {
$start = $new_array['start'];
$end = $new_array['end'];
$value = $start;
if ($start < $end) {
$new_array['start'] = $start + 1;
} else {
$new_array = array();
}
$is_write = cls_shmop::writeArray($logic_table, $new_array);
} else {
$range = $this->getLastSeq($logic_table);
if ($range) {
$min = $range->getMin();
$max = $range->getMax();
$array = array();
$array['start'] = $min + 1;
$array['end'] = $max;
$value = $min;
$is_write = cls_shmop::writeArray($logic_table, $array);
}
}
if ($is_write && $value) {
break;
}
}
flock($file, LOCK_UN);
}
fclose($file);
return $value;
}
function __construct($config_array = array())
{
parent::__construct($config_array);
if (isset($config_array['consistent_hash_separate_string'])) {
$this->consistent_hash_separate_string = $config_array['consistent_hash_separate_string'];
}
if (isset($config_array['consistent_hash_separate_mod_max_value'])) {
$this->consistent_hash_separate_mod_max_value = $config_array['consistent_hash_separate_mod_max_value'];
}
$list = cls_shmop::readArray(self::INIT_CONSISTENT_HASH_SECTION_CACHE_KEY . parent::getLogicTable());
if ($list) {
$this->node_list = $list;
} else {
$this->initNodeList();
}
}