DocumentationHackReferenceClassMCRouterException__construct

MCRouterException::__construct

public function __construct(
  string $message,
  int $op = MCRouter::mc_op_unknown,
  int $reply = MCRouter::mc_res_unknown,
  string $key = '',
);

Parameters

string $message
int $op = MCRouter::mc_op_unknown
int $reply = MCRouter::mc_res_unknown
string $key = ''

Examples

You normally will catch a MCRouterException over constructing one explicitly, but it can be done. Here is an example where you can check the version of the memcached server and throw if you don't have the right one.

async function simple_mcrouter(): Awaitable<void> {
  $servers = Vector {\getenv('HHVM_TEST_MCROUTER')};
  $mc = \MCRouter::createSimple($servers);
  $ver = await $mc->version();
  if (\strpos($ver, "100.100") === false) {
    throw new \MCRouterException(
      "The version of memcached is not right",
      \MCRouter::mc_res_connect_error,
      \MCRouter::mc_op_servererr,
    );
  }
}


<<__EntryPoint>>
async function run(): Awaitable<void> {
  try {
    await simple_mcrouter();
  } catch (\MCRouterException $ex) {
    \var_dump($ex->getMessage());
    \var_dump($ex->getOp());
  }
}
```.hhvm.expect
string(37) "The version of memcached is not right"
int(14)
```.skipif
\Hack\UserDocumentation\API\Examples\MCRouter\skipif();