public static function createConn()
{
$successful = false;
if (!isset(self::$sdk) || !isset(self::$dynamodb)) {
$accessKey = json_decode(file_get_contents(self::$dbAccessKeyFile));
self::$sdk = new Aws\Sdk(['region' => 'ap-northeast-1', 'version' => 'latest', 'credentials' => ['key' => $accessKey->{"key"}, 'secret' => $accessKey->{"secret"}]]);
self::$dynamodb = self::$sdk->createDynamoDb();
}
if (isset(self::$sdk) && isset(self::$dynamodb)) {
$successful = true;
}
return $successful;
}
