MCRouterOptionException::__construct
public function __construct(
varray<darray<string>> $errors,
);
Parameters
Examples
You normally will catch a MCRouterOptionException over constructing one explicitly, but it can be done. Here is an example where you can check the options and throw the exception with a custom error if you don't have good options.
function construct_mcrouter(darray<string, mixed> $options): void {
if (!\array_key_exists('config_str', $options)) {
// You can have multiple string => string errors in the array
$errors = varray[darray['format' => 'Need config string']];
throw new \MCRouterOptionException($errors);
}
$mc = new \MCRouter($options);
}
<<__EntryPoint>>
function run(): void {
$servers = Vector {\getenv('HHVM_TEST_MCROUTER')};
// For many use cases, calling MCRouter::createSimple($servers) would
// suffice here. But this shows you how to explicitly create the configuration
// options for creating an instance of MCRouter
$options = darray[
'config_sentence' => \json_encode(
darray[
'pools' => darray[
'P' => darray[
'servers' => $servers,
],
],
'route' => 'PoolRoute|P',
],
),
];
try {
construct_mcrouter($options);
} catch (\MCRouterOptionException $ex) {
\var_dump($ex->getMessage());
\var_dump($ex->getErrors()); // An array of 'format' => 'Need config string'
}
}
```.hhvm.expectf
string(23) "Failure parsing options"
varray(1) {
darray(1) {
["format"]=>
string(18) "Need config string"
}
}
```.example.hhvm.out
string(23) "Failure parsing options"
varray(1) {
darray(1) {
["format"]=>
string(18) "Need config string"
}
}
```.skipif
\Hack\UserDocumentation\API\Examples\MCRouter\skipif();