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<MongoDB\Driver\Monitoring\TopologyClosedEvent::getTopologyIdMongoDB\Driver\Monitoring\TopologyOpeningEvent::getTopologyId>
^MongoDB\Driver\MonitoringLast updated: Mon, 26 Oct 2026

The MongoDB\Driver\Monitoring\TopologyOpeningEvent class

(mongodb >=1.13.0)

Introduction

The MongoDB\Driver\Monitoring\TopologyOpeningEvent class encapsulates information about an opened topology.

Note:

Due to the driver's connection handling and persistence behavior, this event may not be observed if a MongoDB\Driver\Manager uses a previously persisted » libmongoc client.

Class synopsis

final class MongoDB\Driver\Monitoring\TopologyOpeningEvent {
/* Properties */
/* Methods */
final public function getTopologyId(): MongoDB\BSON\ObjectId
}

Properties

topologyId

The topology ID.

Changelog

Version Description
PECL mongodb 2.3.0 Added public readonly properties.

Table of Contents


<MongoDB\Driver\Monitoring\TopologyClosedEvent::getTopologyIdMongoDB\Driver\Monitoring\TopologyOpeningEvent::getTopologyId>
^MongoDB\Driver\MonitoringLast updated: Mon, 26 Oct 2026