Introduction
    PHP Manual
    PHP Manual»MongoDB\Driver\Monitoring»MongoDB\Driver\Monitoring\TopologyChangedEvent

    The MongoDB\Driver\Monitoring\TopologyChangedEvent class

    (mongodb >=1.13.0)

    The MongoDB\Driver\Monitoring\TopologyChangedEvent class encapsulates information about a changed topology description. For example, a topology discovering a new replica set primary would cause its topology description to change.

    final class MongoDB\Driver\Monitoring\TopologyChangedEvent {
    /* Properties */
    public readonly MongoDB\BSON\ObjectId $topologyId;
    public readonly MongoDB\Driver\TopologyDescription $newDescription;
    public readonly MongoDB\Driver\TopologyDescription $previousDescription;
    /* Methods */
    final public function getNewDescription(): MongoDB\Driver\TopologyDescription
    final public function getPreviousDescription(): MongoDB\Driver\TopologyDescription
    final public function getTopologyId(): MongoDB\BSON\ObjectId
    }
    topologyId
    The topology ID.
    newDescription
    The new topology description.
    previousDescription
    The previous topology description.
    Version Description
    PECL mongodb 2.3.0 Added public readonly properties.

    Table of Contents

    PHP logo

    PHP is developed and maintained by a global community of contributors.

    The PHP Foundation helps fund this work. If PHP is part of your business or projects, consider sponsoring the Foundation.
    PHP

    Learn

    The PHP Foundation

    Legal

    Copyright © 2001 - 2026 the PHP Group. All Rights Reserved.
    To Top