public async Task SubscribeToChunk(ChunkKey key)
{
if (Subscriptions.ContainsKey(key))
{
return;
}
var channel = OutgoingChannel;//copy to local for closure;
var chunkHandlerSubscription = await BattleHandler.GetChunkHandlerAndSubscribeAsync(key, (chunkKey, update) => OnChunkUpdateAsync(key, update, channel));
if (Subscriptions.TryAdd(key, chunkHandlerSubscription))
{
await SendChunkStateAsync(key, chunkHandlerSubscription);
}
else
{
chunkHandlerSubscription.Dispose();
throw new InvalidOperationException("Duplicate subscription is detected.");
}
}
