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 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());
}