MongoDB::getReadPreference

(PECL mongo >=1.3.0)

MongoDB::getReadPreferenceGet the read preference for this database

Опис

public array MongoDB::getReadPreference ( void )

Параметри

В цієї функції немає параметрів.

Значення, що повертаються

This function returns an array describing the read preference. The array contains the values type for the string read preference mode (corresponding to the MongoClient constants), and tagsets containing a list of all tag set criteria. If no tag sets were specified, tagsets will not be present in the array.

Журнал Змін

Версія Опис
1.3.3 The return value has changed to be consistent with MongoDB::setReadPreference(). The type value was changed from a number to a string, type_string was removed, and tagsets now expresses tags as key/value pairs instead of colon-delimited strings.

Приклади

Приклад #1 MongoDB::getReadPreference() return value example

<?php

$m 
= new MongoClient();
$db $m->test;
$db->setReadPreference(MongoClient::RP_SECONDARY, array(
    array(
'dc' => 'east''use' => 'reporting'),
    array(
'dc' => 'west'),
    array(),
));
var_dump($db->getReadPreference());
?>

Наведений вище приклад виведе:

array(2) {
  ["type"]=>
  string(9) "secondary"
  ["tagsets"]=>
  array(3) {
    [0]=>
    array(2) {
      ["dc"]=>
      string(4) "east"
      ["use"]=>
      string(9) "reporting"
    }
    [1]=>
    array(1) {
      ["dc"]=>
      string(7) "west"
    }
    [2]=>
    array(0) {
    }
  }
}

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