Photon matchmaking - Join or create a room using in Unity with an SQL lobby - unity3d

Question

I am trying to implement skill based matchmaking using Photon in Unity. It seems
I got most of this code from the documentation and it works but not well.
The problem is that you can't use JoinOrCreate() with the sql lobby type so my logic here is try and find a room, if it fails create one.
void init()
{
_client = Game.Context.GetComponent<SocketConnectionManager>().client;
joinRoom();
}
public void joinRoom()
{
TypedLobby sqlLobby = new TypedLobby("skillLobby", LobbyType.SqlLobby);
string sqlLobbyFilter = "C0 BETWEEN 100 AND 200";
_client.OpJoinRandomRoom(null, MatchMaker.MaxPlayers, MatchmakingMode.FillRoom, sqlLobby, sqlLobbyFilter);
}
public void createRoom()
{
RoomOptions o = new RoomOptions();
o.MaxPlayers = MatchMaker.MaxPlayers;
o.CustomRoomProperties = new Hashtable() { { "C0", Game.Me.getInt("trophies") } };
o.CustomRoomPropertiesForLobby = new string[] { "C0" }; // this makes "C0" available in the lobby
TypedLobby sqlLobby = new TypedLobby("skillLobby", LobbyType.SqlLobby);
_client.OpCreateRoom("", o, sqlLobby);
}
private void onEvent(EventData obj)
{
if (_client.CurrentRoom != null)
{
if (_client.CurrentRoom.PlayerCount >= _client.CurrentRoom.MaxPlayers)
{
// sweet I am good to go.
}
}
else
{
createRoom();
}
}
The problem is this is pretty unreliable. Say two players try to find a game at the same time they will both search fail and then both create. Now I have two players sitting in empty rooms instead of playing each other.
Any ideas on a better system?
Thanks all.

Answer 1

Thank you for choosing Photon!
First of all, there are few things that you should understand about Photon:
you can't use JoinOrCreate() with the sql lobby type
This is not correct.
Where did you read such thing?
Did you test this yourself? What did you test exactly?
onEvent (LoadBalancingClient.OnEventAction) callback cannot be used to be notified of a failed join random room operation. Instead, you should make use of the LoadBalancingClient.OnOpResponseAction callback, as follows:
private void OnOpResponse(OperationResponse operationResponse)
{
switch (operationResponse.Code)
{
case OperationCode.JoinRandomGame:
if (operationResponse.ReturnCode == ErrorCode.NoMatchFound)
{
createRoom();
}
break;
}
}
To detect a join event inside a room (local or remote player entered a room):
private void onEvent(EventData eventData)
{
switch (eventData.Code)
{
case EventCode.Join:
int actorNr = (int)eventData[ParameterCode.ActorNr];
PhotonPlayer originatingPlayer = this.GetPlayerWithId(actorNr);
if (originatingPlayer.IsLocal)
{
}
else
{
}
break;
}
}
To answer your question:
Say two players try to find a game at the same time they will both
search fail and then both create.
Any ideas on a better system?
No.
This issue happens only during the development phase where you use a few clients to run some tests. Once you have enough user base you won't notice this issue.