# MongoDB\Driver\Monitoring\SDAMSubscriber::topologyOpening

(mongodb >=1.13.0)

MongoDB\Driver\Monitoring\SDAMSubscriber::topologyOpening — Notification method for opening the topology

### Descripción

abstract public MongoDB\Driver\Monitoring\SDAMSubscriber::topologyOpening(MongoDB\Driver\Monitoring\TopologyOpeningEvent `$event`): void

If the subscriber has been registered, the driver will call this method when the topology is opened.

### Parámetros

`event` (MongoDB\Driver\Monitoring\TopologyOpeningEvent)

  An event object encapsulating information about the opened topology.

### Valores devueltos

No devuelve ningún valor.

### Errores/Excepciones

- Lanza una MongoDB\Driver\Exception\InvalidArgumentException en errores de análisis de argumentos.

### Ver también

- MongoDB\Driver\Monitoring\TopologyOpeningEvent
- MongoDB\Driver\Monitoring\addSubscriber() - Registers a monitoring event subscriber globally
- MongoDB\Driver\Manager::addSubscriber() - Registers a monitoring event subscriber with this Manager