object GroupChannelActor

GroupChannelActor is an Akka Actor that represents the group channel's WebSocket. A group channel is a WebSocket connecting a client who's running a study with the JATOS server.

A GroupChannelActor is only be opened after a study run (identified by a StudyResult) joined a group, which is done in the GroupAdministration. Group data (e.g. who's member) are persisted in a GroupResult entity. A GroupChannelActor is closed after the StudyResult left the GroupResult.

A GroupChannelActor belongs to a GroupDispatcher. A GroupChannelActor is created by the GroupChannel service and registers itself by sending a RegisterChannel message to its GroupDispatcher. It closes down after receiving a PoisonChannel message or if the WebSocket is closed. While closing down it unregisters from the GroupDispatcher by sending a UnregisterChannel message. A GroupChannelActor can, if it's told to, reassign itself to a different GroupDispatcher.

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