MongoDB\Driver\Manager::getReadPreference
(mongodb >=1.0.0)
MongoDB\Driver\Manager::getReadPreference — Return the ReadPreference for the Manager
Description
Returns the MongoDB\Driver\ReadPreference for the Manager, which is derived from its URI options. This is the default read preference for queries and commands executed on the Manager.
Liste de paramètres
Cette fonction ne contient aucun paramètre.
Valeurs de retour
The MongoDB\Driver\ReadPreference for the Manager.
Erreurs / Exceptions
- Lance une exception MongoDB\Driver\InvalidArgumentException lors d'une erreur survenue pendant l'analyse d'un argument.
Exemples
Exemple #1 MongoDB\Driver\Manager::getReadPreference() example
<?php
$manager = new MongoDB\Driver\Manager('mongodb://localhost:27017');
var_dump($manager->getReadPreference());
$manager = new MongoDB\Driver\Manager('mongodb://localhost:27017/?readPreference=secondaryPreferred&readPreferenceTags=dc:ny,rack:1&readPreferenceTags=dc:ny&readPreferenceTags=');
var_dump($manager->getReadPreference());
?>Résultat de l'exemple ci-dessus est similaire à :
object(MongoDB\Driver\ReadPreference)#2 (1) {
["mode"]=>
string(7) "primary"
}
object(MongoDB\Driver\ReadPreference)#1 (2) {
["mode"]=>
string(18) "secondaryPreferred"
["tags"]=>
array(3) {
[0]=>
object(stdClass)#3 (2) {
["dc"]=>
string(2) "ny"
["rack"]=>
string(1) "1"
}
[1]=>
object(stdClass)#4 (1) {
["dc"]=>
string(2) "ny"
}
[2]=>
object(stdClass)#5 (0) {
}
}
}
Voir aussi
- MongoDB\Driver\ReadPreference
- MongoDB\Driver\Manager::__construct() - Create new MongoDB Manager
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