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MongoDB\Driver\Manager	MongoDB\Driver\Manager::__construct

MongoDB\Driver\Manager	Last updated: Mon, 26 Oct 2026

MongoDB\Driver\Manager::addSubscriber

(mongodb >=1.10.0)

MongoDB\Driver\Manager::addSubscriber — Registers a monitoring event subscriber with this Manager

Description

final public function MongoDB\Driver\Manager::addSubscriber(MongoDB\Driver\Monitoring\Subscriber $subscriber): void

Registers a monitoring event subscriber with this Manager. The subscriber will be notified of all events for this Manager.

Note:
If subscriber is already registered with this Manager, this function is a no-op. If subscriber is also registered globally, it will still only be notified once of each event for this Manager.

Parameters

subscriber (MongoDB\Driver\Monitoring\Subscriber): A monitoring event subscriber to register with this Manager.

Return Values

No value is returned.

Errors/Exceptions

Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
Throws MongoDB\Driver\Exception\InvalidArgumentException if subscriber is a MongoDB\Driver\Monitoring\LogSubscriber, since loggers can only be registered globally.

See Also

MongoDB\Driver\Manager::removeSubscriber() - Unregisters a monitoring event subscriber with this Manager
MongoDB\Driver\Monitoring\Subscriber
MongoDB\Driver\Monitoring\CommandSubscriber
MongoDB\Driver\Monitoring\addSubscriber() - Registers a monitoring event subscriber globally
Application Performance Monitoring (APM)

MongoDB\Driver\Manager	MongoDB\Driver\Manager::__construct

MongoDB\Driver\Manager	Last updated: Mon, 26 Oct 2026