MongoDB\Driver\Manager::getReadPreference

(mongodb >=1.0.0)

MongoDB\Driver\Manager::getReadPreferenceReturn the ReadPreference for the Manager

Açıklama

final public MongoDB\Driver\Manager::getReadPreference ( void ) : 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.

Değiştirgeler

Bu işlevin değiştirgesi yoktur.

Dönen Değerler

The MongoDB\Driver\ReadPreference for the Manager.

Hatalar/İstisnalar

Örnekler

Örnek 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());

?>

Yukarıdaki örnek şuna benzer bir çıktı üretir:

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) {
    }
  }
}

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