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.
Parameters
This function has no parameters.
Return Values
The MongoDB\Driver\ReadPreference for the Manager.
Errors/Exceptions
- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
Examples
Example #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());
?>
The above example will output something similar to:
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) { } } }
See Also
- MongoDB\Driver\ReadPreference
- MongoDB\Driver\Manager::__construct() - Create new MongoDB Manager