public override Task OnConnectedAsync()
{
string userId = Context.GetHttpContext().Request.Query["userId"].ToString();
//add the connection to the group that corresponds to the user id
Groups.AddToGroupAsync(Context.ConnectionId, userId);
SignalRConnectionToGroupsMap.TryAddGroup(Context.ConnectionId, userId);
return(base.OnConnectedAsync());
}
public Task Subscribe(String id)
{
List <String> groups;
var success = SignalRConnectionToGroupsMap.TryRemoveConnection(Context.ConnectionId, out groups);
if (groups != null)
{
foreach (var group in groups)
{
Groups.Remove(Context.ConnectionId, group);
}
}
SignalRConnectionToGroupsMap.TryAddGroup(Context.ConnectionId, id);
return(Groups.Add(Context.ConnectionId, id));
}
public override Task OnDisconnectedAsync(Exception exception)
{
List <string> groups = new List <string>();
if (SignalRConnectionToGroupsMap.TryRemoveConnection(Context.ConnectionId, out groups))
{
//remove connection from all the groups
if (groups != null && groups.Count > 0)
{
foreach (var groupName in groups)
{
Groups.RemoveFromGroupAsync(Context.ConnectionId, groupName);
}
}
}
return(base.OnDisconnectedAsync(exception));
}