> For the complete documentation index, see [llms.txt](https://asrob-uc3m.gitbook.io/robotdevastation-developer-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://asrob-uc3m.gitbook.io/robotdevastation-developer-manual/robotdevastation/managers/network-management/listening-to-events.md).

# Listening to Events

When a class needs to receive network events, such as be notified of data arrival, it must implement the `NetworkEventListener` interface. Once registered in the `NetworkManager`, it will receive network events each time the server generates them.

## NetworkEventListener

This interface has the following function, that is called when the corresponding event is triggered in the `NetworkManager`:

* `onDataArrived()`: called when the server sends player data.

## MockNetworkEventListener

Implements the following functions to extract information about received network events:

* `getDataArrived()`: returns the amount of network events received.
* `resetDataArrived()`: resets the counter of network events received.
* `getStoredPlayers()`: returns the player data received in the most recent network event.