# MongoDB\Driver\Monitoring\SDAMSubscriber::topologyChanged

(mongodb >=1.13.0)

MongoDB\Driver\Monitoring\SDAMSubscriber::topologyChanged — Notification method for a topology description change

### Descripción

abstract public MongoDB\Driver\Monitoring\SDAMSubscriber::topologyChanged(MongoDB\Driver\Monitoring\TopologyChangedEvent `$event`): void

If the subscriber has been registered, the driver will call this method when the topology's description has changed.

### Parámetros

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

  An event object encapsulating information about the changed topology description.

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