async Task <GangState <TStateData> > IGangStateStore
.CommitAsync <TStateData>(string gangId, GangState <TStateData> state, GangAudit audit)
{
var version = state.Version - (uint)state.Uncommitted.Count;
foreach (var eventData in state.Uncommitted)
{
var e = GangStateEvent.From(eventData, audit);
var wrapper = new GangStateEventWrapper(
eventData,
GangStateEventMap.GetName <TStateData>(eventData.GetType()),
audit.SetVersion(++version)
);
_events.OnNext(e);
var key = GetEventKey(++_sequenceNumber);
await _eventStore.SetAsync(
key, wrapper,
overwrite : false
);
}
await _cache.SetAsync(gangId,
new { state.Data, state.Version }
);
await _sequenceNumberStore.SetAsync(KEY_SEQUENCE_NUMBER, _sequenceNumber);
return(GangState.Create(state.Data, state.Version));
}
/// <summary>
/// Adds services for TStateData, including;
///
/// Command Executor
/// Command handlers in same assembly as TStateData
///
/// </summary>
/// <typeparam name="TStateData">State</typeparam>
/// <typeparam name="TStore">Store implementation</typeparam>
/// <param name="services">Services collection</param>
/// <returns>Services collection</returns>
public static IServiceCollection AddGangState <TStateData, TStore>(
this IServiceCollection services
)
where TStateData : class
where TStore : class, IGangStateStore
{
services.AddSingleton(_stateMap = _stateMap.Add <TStateData>());
services.TryAddSingleton <IGangStateStore, TStore>();
services.TryAddSingleton <IGangCommandExecutor <TStateData>, GangCommandExecutor <TStateData> >();
return(services
.AddGangCommandHandlers <TStateData>());
}
public GangStateStore(
IGangSerializationService serializer,
GangStateEventMap eventMap,
IGangStoreFactory storeFactory
)
{
_events = new Subject <IGangStateEvent>();
_eventStore = storeFactory
.For <GangStateEventWrapper>()
.AddIndex(e => e.Audit.GangId)
.Create(STORE_EVENTS);
_sequenceNumberStore = storeFactory
.For <uint>()
.Create(STORE_EVENTS);
_cache = storeFactory
.For <object>()
.Create(STORE_CACHE);
_serializer = serializer;
_eventMap = eventMap;
_sequenceNumber = _sequenceNumberStore
.TryGetAsync(KEY_SEQUENCE_NUMBER)
.GetAwaiter().GetResult();
}