public static function get_client($write_mode = false)
{
// * Try to connect to every cassandra node in order
// * Failed connections will be retried
// * Once a connection is opened, it stays open
// * TODO: add random and round robin order
// * TODO: add write-preferred and read-preferred nodes
if (self::$last_get instanceof CassandraClient) {
return self::$last_get;
}
shuffle(self::$connections);
foreach (self::$connections as $connection) {
try {
$transport = $connection['transport'];
$client = $connection['client'];
if (!$transport->isOpen()) {
$transport->open();
}
self::$last_get = $client;
return $client;
} catch (TException $tx) {
self::$last_error = 'TException: ' . $tx->getMessage() . "\n";
continue;
}
}
throw new Exception("Could not connect to a cassandra server");
}
