MongoDB\Driver\Manager::getReadPreference
(mongodb >=1.0.0)
MongoDB\Driver\Manager::getReadPreference — Return the ReadPreference for the Manager
説明
final public MongoDB\Driver\Manager::getReadPreference ( ) : MongoDB\Driver\ReadPreference
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.
パラメータ
この関数にはパラメータはありません。
例
例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());?>
上の例の出力は、 たとえば以下のようになります。
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) { } } }