MongoDB::getReadPreference
(PECL mongo >=1.3.0)
MongoDB::getReadPreference — Get the read preference for this database
Beschreibung
public MongoDB::getReadPreference
( void
) : array
Parameter-Liste
Diese Funktion besitzt keine Parameter.
Rückgabewerte
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.
Changelog
| Version | Beschreibung |
|---|---|
| 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.
|
Beispiele
Beispiel #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());
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
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) {
}
}
}
Siehe auch
- The read preferences documentation.
- MongoDB::setReadPreference() - Set the read preference for this database
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