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MongoDB\Driver\Monitoring\TopologyChangedEvent::getNewDescription	MongoDB\Driver\Monitoring\TopologyChangedEvent::getTopologyId

MongoDB\Driver\Monitoring\TopologyChangedEvent	Last updated: Mon, 26 Oct 2026

MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescription

(mongodb >=1.13.0)

MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescription — Returns the previous description for the topology

Description

final public function MongoDB\Driver\Monitoring\TopologyChangedEvent::getPreviousDescription(): MongoDB\Driver\TopologyDescription

Parameters

This function has no parameters.

Return Values

Returns the previous MongoDB\Driver\TopologyDescription for the topology.

Errors/Exceptions

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

MongoDB\Driver\Monitoring\TopologyChangedEvent::getNewDescription	MongoDB\Driver\Monitoring\TopologyChangedEvent::getTopologyId

MongoDB\Driver\Monitoring\TopologyChangedEvent	Last updated: Mon, 26 Oct 2026