private async Task StartWatcherAsync()
{
// observing a hardcoded player id for sample purposes
// the load generator will update player ids within a range that includes this player
var playerId = new Guid("{2349992C-860A-4EDA-9590-000000000006}");
var player = client.GetGrain <IPlayerGrain>(playerId);
IGameGrain game = null;
// poll for this player to join a game
while (game == null)
{
logger.LogInformation("Getting current game for player {@PlayerId}...",
playerId);
try
{
game = await player.GetCurrentGameAsync();
}
catch (Exception error)
{
logger.LogError(error,
"Error while requesting current game for player {@PlayerId}",
playerId);
}
if (game == null)
{
try
{
await Task.Delay(1000, startCancellation.Token);
}
catch (OperationCanceledException)
{
return;
}
}
}
logger.LogInformation("Observing updates for game {@GameKey}",
game.GetPrimaryKey());
// subscribe for updates
var watcher = client.ServiceProvider.GetService <IGameObserver>();
await game.ObserveGameUpdatesAsync(
await client.CreateObjectReference <IGameObserver>(watcher));
logger.LogInformation("Subscribed successfully to game {@GameKey}",
game.GetPrimaryKey());
}
public Task ChangeState(IGameGrain game, GameState oldState, GameState newState)
{
var gameId = game.GetPrimaryKey();
switch (oldState)
{
case GameState.Unstarted:
_unstarted.Remove(gameId);
break;
case GameState.InProgress:
_inProgress.Remove(gameId);
break;
case GameState.Finished:
_finished.Remove(gameId);
break;
default:
throw new InvalidOperationException();
}
switch (newState)
{
case GameState.Unstarted:
_unstarted.Add(gameId, game);
break;
case GameState.InProgress:
_inProgress.Add(gameId, game);
break;
case GameState.Finished:
_finished.Add(gameId, game);
break;
default:
throw new InvalidOperationException();
}
return TaskDone.Done;
}
public async Task StartAsync(CancellationToken cancellationToken)
{
// the load generator will update player ids within a range that includes this player
var playerId = new Guid("{2349992C-860A-4EDA-9590-000000000006}");
var player = _client.GetGrain <IPlayerGrain>(playerId);
// poll for this player to join a game
while (_game == null)
{
_logger.LogInformation("Getting current game for player {@PlayerId}...",
playerId);
try
{
_game = await player.GetCurrentGameAsync();
}
catch (Exception error)
{
_logger.LogError(error,
"Error while requesting current game for player {@PlayerId}",
playerId);
}
if (_game == null)
{
try
{
await Task.Delay(1000, cancellationToken);
}
catch (OperationCanceledException)
{
return;
}
}
}
_logger.LogInformation("Observing updates for game {@GameKey}",
_game.GetPrimaryKey());
// subscribe for updates
var reference = await _client.CreateObjectReference <IGameObserver>(_observer);
await _game.ObserveGameUpdatesAsync(reference);
_logger.LogInformation("Subscribed successfully to game {@GameKey}",
_game.GetPrimaryKey());
}
/// <summary>
/// Game grain calls this method to notify that the player has left the game.
/// </summary>
public Task LeaveGameAsync(IGameGrain game)
{
currentGame = null;
logger.LogInformation("Player {@PlayerKey} left game {@GameKey}",
GrainKey, game.GetPrimaryKey());
return(Task.CompletedTask);
}
/// <summary>
/// Game grain calls this method to notify that the player has joined the game.
/// </summary>
public Task JoinGameAsync(IGameGrain game)
{
currentGame = game;
logger.LogInformation("Player {@PlayerKey} joined game {@GameKey}",
GrainKey, game.GetPrimaryKey());
return(Task.CompletedTask);
}
// Game grain calls this method to notify that the player has left the game.
public Task LeaveGame(IGameGrain game)
{
currentGame = null;
Console.WriteLine(
"Player {0} left game {1}",
this.GetPrimaryKey(),
game.GetPrimaryKey());
return(Task.CompletedTask);
}
// Game grain calls this method to notify that the player has joined the game.
public Task JoinGame(IGameGrain game)
{
currentGame = game;
Console.WriteLine(
"Player {0} joined game {1}",
this.GetPrimaryKey(),
game.GetPrimaryKey());
return(Task.CompletedTask);
}
public Task JoinGame(IGameGrain game, IPlayerGrain player)
{
var primaryKey = game.GetPrimaryKey();
if (_activeGames.ContainsKey(primaryKey))
{
return(TaskDone.Done);
}
_activeGames.Add(primaryKey, game);
_activePlayers.Add(primaryKey, player);
Console.WriteLine(" -- {0,-10} -- {1} joined a game.", "Account", _username);
return(TaskDone.Done);
}
public Task LeaveGame(IGameGrain game)
{
syncTimer.Dispose();
syncTimer = null;
currentGame = null;
Console.WriteLine("Player {0} left game {1}", this.GetPrimaryKey(), game.GetPrimaryKey());
// TODO: Have to consider a player leave a game during a running game.
previous = null;
return(TaskDone.Done);
}
static async Task <IClusterClient> RunWatcher()
{
try
{
// Connect to local silo
var config = ClientConfiguration.LocalhostSilo();
var client = new ClientBuilder().UseConfiguration(config).Build();
await client.Connect();
// Hardcoded player ID
Guid playerId = new Guid("{2349992C-860A-4EDA-9590-000000000006}");
IPlayerGrain player = client.GetGrain <IPlayerGrain>(playerId);
IGameGrain game = null;
while (game == null)
{
Console.WriteLine("Getting current game for player {0}...", playerId);
try
{
game = await player.GetCurrentGame();
if (game == null) // Wait until the player joins a game
{
await Task.Delay(5000);
}
}
catch (Exception exc)
{
Console.WriteLine("Exception: ", exc.GetBaseException());
}
}
Console.WriteLine("Subscribing to updates for game {0}...", game.GetPrimaryKey());
// Subscribe for updates
var watcher = new GameObserver();
await game.SubscribeForGameUpdates(
await client.CreateObjectReference <IGameObserver>(watcher));
Console.WriteLine("Subscribed successfully. Press <Enter> to stop.");
return(client);
}
catch (Exception exc)
{
Console.WriteLine("Unexpected Error: {0}", exc.GetBaseException());
throw;
}
}
/// <summary>
/// Simulates a companion application that connects to the game that a particular player is currently part of
/// and subscribes to receive live notifications about its progress.
/// </summary>
static void Main(string[] args)
{
try
{
var config = ClientConfiguration.LocalhostSilo();
GrainClient.Initialize(config);
// Hardcoded player ID
Guid playerId = new Guid("{2349992C-860A-4EDA-9590-000000000006}");
IPlayerGrain player = GrainClient.GrainFactory.GetGrain <IPlayerGrain>(playerId);
IGameGrain game = null;
while (game == null)
{
Console.WriteLine("Getting current game for player {0}...", playerId);
try
{
game = player.GetCurrentGame().Result;
if (game == null) // Wait until the player joins a game
{
game = null;
Thread.Sleep(5000);
}
}
catch (Exception exc)
{
Console.WriteLine("Exception: ", exc.GetBaseException());
}
}
Console.WriteLine("Subscribing to updates for game {0}...", game.GetPrimaryKey());
// Subscribe for updates
var watcher = new GameObserver();
game.SubscribeForGameUpdates(GrainClient.GrainFactory.CreateObjectReference <IGameObserver>(watcher).Result).Wait();
// Block main thread so that the process doesn't exit. Updates arrive on thread pool threads.
Console.WriteLine("Subscribed successfully. Press <Enter> to stop.");
Console.ReadLine();
}
catch (Exception exc)
{
Console.WriteLine("Unexpected Error: {0}", exc.GetBaseException());
}
}
// Game grain calls this method to notify that the player has left the game.
public Task LeaveGame(IGameGrain game)
{
currentGame = null;
Console.WriteLine("Player {0} left game {1}", this.GetPrimaryKey(), game.GetPrimaryKey());
return TaskDone.Done;
}
// Game grain calls this method to notify that the player has joined the game.
public Task JoinGame(IGameGrain game)
{
currentGame = game;
Console.WriteLine("Player {0} joined game {1}", this.GetPrimaryKey(), game.GetPrimaryKey());
return TaskDone.Done;
}
public Task NewGame(IGameGrain game)
{
var gameId = game.GetPrimaryKey();
_unstarted.Add(gameId, game);
return TaskDone.Done;
}
public Task JoinGame(IGameGrain game)
{
currentGame = game;
Console.WriteLine("Player {0} joined game {1}", this.GetPrimaryKeyLong(), game.GetPrimaryKey());
if (previous == null)
{
previous = new Progression();
}
if (syncTimer == null)
{
syncTimer = base.RegisterTimer(TimerCallback, null, TimeSpan.Zero, TimeSpan.FromSeconds(2));
}
return(TaskDone.Done);
}