MongoDB\Driver\ReadConcern::__construct

(mongodb >=1.0.0)

MongoDB\Driver\ReadConcern::__construct — Create a new ReadConcern

説明

final public function MongoDB\Driver\ReadConcern::__construct(?string $level = null)

Constructs a new MongoDB\Driver\ReadConcern, which is an immutable value object.

パラメータ

level: The » read concern level. You may use, but are not limited to, one of the class constants.

エラー / 例外

Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.

例

例1 MongoDB\Driver\ReadConcern::__construct() example

<?php

/* Unspecified read isolation level (uses the server's default behavior) */
$rc = new MongoDB\Driver\ReadConcern();

/* Request read isolation from a single replica set node */
$rc = new MongoDB\Driver\ReadConcern(MongoDB\Driver\ReadConcern::LOCAL);

/* Request read isolation from a majority of the replica set nodes */
$rc = new MongoDB\Driver\ReadConcern(MongoDB\Driver\ReadConcern::MAJORITY);

?>

参考

» Read Concern reference

関連キーワード:

ReadConcern MongoDB Driver construct level read Create isolation Request replica bsonSerialize getLevel mongodb final Constructs immutable concern limited constants Throws Exception InvalidArgumentException argument parsing errors