public void Move(Guid gameId, int row, int col)
{
// TODO: exceptions in following invocation are silently lost, so we need a way to log and show them.
Action move = () =>
{
/*
* Here instance members are out of lifetime scope setup by Autofac because of delayed invocation
* TODO: use ServiceLocator to instantiate them?
*/
using (var repository = new EFRepository(new ApplicationDbContext()))
{
var messageFactory = new JsonMessageFactory();
var game = repository.GetGame(gameId);
var snapshot = repository.GetGameSnapshot(game);
game.Move(_player, row, col);
PlayerRole playerRole = game.GetPlayerRole(_player);
var message = messageFactory.CreateMovedMessage(gameId,
playerRole, row, col, game.CurrentState);
repository.AddMessage(message);
snapshot.LastMessage = message;
repository.Save();
}
};
MoveRequests.AddOrUpdate(gameId,
id => Task.Factory.StartNew(move), // on first call run for this gameId
(id, currentTask) => currentTask.ContinueWith(t => move())); // queue invocation for this gameId
}
