public override async Task OnActivateAsync()
{
IServerSettings serverSettings = GrainFactory.GetGrain <IServerSettings>(0);
_nextAvailEId = 0;
_genSettings = new GeneratorSettings();
await InitGeneratorSettings(_genSettings);
_seed = (await serverSettings.GetSettings()).LevelSeed;
_activedPartitions = new HashSet <IWorldPartition>();
await base.OnActivateAsync();
}