public static IApplicationBuilder UseStreamMessages(this IApplicationBuilder builder,
EventStoreClient eventStore)
{
return(builder.MapMethods(
"/streams/{streamId}/{streamRevision:int}",
(HttpMethod.Get, GetStreamMessage)));
async ValueTask <Response> GetStreamMessage(HttpContext context)
{
var streamId = context.Request.GetStreamId();
var streamRevision = context.Request.GetStreamRevision();
try {
var @event = await eventStore.ReadStreamAsync(Direction.Forwards, streamId !,
StreamPosition.FromStreamRevision(streamRevision !.Value), 1,
resolveLinkTos : false, userCredentials : context.GetUserCredentials(),
cancellationToken : context.RequestAborted)
.Where(e => e.OriginalEvent.EventNumber == streamRevision)
.SingleOrDefaultAsync(context.RequestAborted);
return(new HALResponse(StreamMessageRepresentation.Instance, new StreamMessageResource(
streamId !, streamRevision !.Value, @event))
{
StatusCode = @event.OriginalEvent == null ? HttpStatusCode.NotFound : HttpStatusCode.OK
});
} catch (StreamNotFoundException) {
return(new HALResponse(StreamMessageRepresentation.Instance, new StreamMessageResource(
streamId !, streamRevision !.Value))
{
StatusCode = HttpStatusCode.NotFound
});
public static async Task <T?> AggregateStream <T>(
this EventStoreClient eventStore,
Guid id,
CancellationToken cancellationToken,
ulong?fromVersion = null
) where T : class, IProjection
{
var readResult = eventStore.ReadStreamAsync(
Direction.Forwards,
StreamNameMapper.ToStreamId <T>(id),
fromVersion ?? StreamPosition.Start,
cancellationToken: cancellationToken
);
// TODO: consider adding extension method for the aggregation and deserialisation
var aggregate = (T)Activator.CreateInstance(typeof(T), true) !;
await foreach (var @event in readResult)
{
var eventData = @event.Deserialize();
aggregate.When(eventData !);
}
return(aggregate);
}
/// <summary>
/// Runs the health check, returning the status of the component being checked.
/// </summary>
/// <param name="context">A context object associated with the current execution.</param>
/// <param name="cancellationToken">A <see cref="T:System.Threading.CancellationToken" /> that can be used to cancel the health check.</param>
/// <returns>
/// A <see cref="T:System.Threading.Tasks.Task`1" /> that completes when the health check has finished, yielding the status of the component being checked.
/// </returns>
/// <exception cref="Exception">$all stream not found</exception>
public async Task <HealthCheckResult> CheckHealthAsync(HealthCheckContext context,
CancellationToken cancellationToken = default)
{
try
{
EventStoreClient client = new EventStoreClient(this.EventStoreClientSettings);
EventStoreClient.ReadStreamResult readResult = client.ReadStreamAsync(Direction.Forwards,
"$all",
StreamPosition.Start,
userCredentials: this.UserCredentials,
resolveLinkTos: true,
cancellationToken: cancellationToken);
ReadState readState = await readResult.ReadState;
if (readState == ReadState.StreamNotFound)
{
throw new Exception("$all stream not found");
}
return(HealthCheckResult.Healthy());
}
catch (Exception ex)
{
return(new HealthCheckResult(context.Registration.FailureStatus, exception: ex));
}
}
public async Task <IList <ResolvedEvent> > ConvertAsync(EventStoreStreamsAttribute config, CancellationToken cancellationToken)
{
if (string.IsNullOrWhiteSpace(config?.ConnectionStringSetting))
{
var esException = new EventStoreStreamsBindingException("ConnectionString cant be empty");
_logger.LogError(esException, esException.Message);
throw esException;
}
using (var client = new EventStoreClient(config.ConnectionStringSetting, _logger))
{
try
{
await client.Connect();
IList <ResolvedEvent> result = null;
if (config.StreamReadDirection == StreamReadDirection.Forward)
{
result = await client.ReadFromStreamForward(config.StreamName, config.StreamOffset, config.ReadSize, config.ResolveLinkTos);
}
else
{
result = await client.ReadFromStreamBackward(config.StreamName, config.StreamOffset, config.ReadSize, config.ResolveLinkTos);
}
return(result);
}
catch (Exception esException)
{
_logger.LogError(esException, esException.Message);
throw;
}
}
}
static Task DefaultEventProcessingFailureHandler(
EventStoreClient client,
PersistentSubscription subscription,
ResolvedEvent resolvedEvent,
Exception exception
)
=> subscription.Nack(PersistentSubscriptionNakEventAction.Retry, exception.Message, resolvedEvent);
public void NotifyOfPackageDelivery(Package package)
{
const string stream = "Package-delivery-stream";
var settings = EventStoreClientSettings
.Create("esdb://127.0.0.1:2113?tls=false");
var packageDeliveryInfo = new PackageDeliveryInfo
{
Number = package.Number,
RecipientName = package.RecipientName,
RecipientEmail = package.RecipientEmail,
RecipientSurname = package.RecipientSurname,
RecipientStreet = package.RecipientStreet,
RecipientStreetNumber = package.RecipientStreetNumber,
RecipientPostCode = package.RecipientPostCode,
RecipientCity = package.RecipientCity,
SenderEmail = package.Sender.Email,
};
using (var client = new EventStoreClient(settings))
{
client.AppendToStreamAsync(
stream,
StreamState.Any,
new[] { GetEventDataFor(packageDeliveryInfo) }).Wait();
}
}
/// <summary>
/// Creates EventStoreDB catch-up subscription service for a given stream
/// </summary>
/// <param name="client"></param>
/// <param name="checkpointStore">Checkpoint store instance</param>
/// <param name="options">Subscription options</param>
/// <param name="consumePipe"></param>
public StreamSubscription(
EventStoreClient client,
StreamSubscriptionOptions options,
ICheckpointStore checkpointStore,
ConsumePipe consumePipe
) : base(client, options, checkpointStore, consumePipe)
=> Ensure.NotEmptyString(options.StreamName);
private HttpClient GetTestClient(String dbfileName, String eventStorePrefix)
{
var client = _factory.WithWebHostBuilder(builder =>
{
String currentPath = System.IO.Path.GetFullPath(".");
Int32 startIndex = currentPath.IndexOf("Beer.DaAPI.Service.IntegrationTests");
String basePath = currentPath.Substring(0, startIndex) + "Beer.DaAPI.Service.API";
builder.UseStartup <FakeStartup>();
builder.UseContentRoot(basePath);
builder.ConfigureTestServices(services =>
{
AddFakeAuthentication(services, "Bearer");
AddDatabase(services, dbfileName);
var settings = EventStoreClientSettings.Create("esdb://127.0.0.1:2113?tls=false");
var client = new EventStoreClient(settings);
ReplaceService(services, new EventStoreBasedStoreConnenctionOptions(client, eventStorePrefix));
});
}).CreateClient();
return(client);
}
public EsCheckpointStore(
EventStoreClient client,
string subscriptionName)
{
_client = client;
_streamName = CheckpointStreamPrefix + subscriptionName;
}
protected override async Task <EventSubscription> Subscribe(
Checkpoint checkpoint,
CancellationToken cancellationToken)
{
var filterOptions = new SubscriptionFilterOptions(
EventTypeFilter.ExcludeSystemEvents(),
10,
(_, p, ct) =>
StoreCheckpoint(
new EventPosition(p.CommitPosition, DateTime.UtcNow),
ct));
var(_, position) = checkpoint;
var subscribeTask = position != null
? EventStoreClient.SubscribeToAllAsync(
new Position(
position.Value,
position.Value),
TransactionalHandler,
false,
HandleDrop,
filterOptions,
cancellationToken : cancellationToken)
: EventStoreClient.SubscribeToAllAsync(
TransactionalHandler,
false,
HandleDrop,
filterOptions,
cancellationToken: cancellationToken);
var sub = await subscribeTask.NoContext();
return(new EventSubscription(SubscriptionId,
new Stoppable(() => sub.Dispose())));
}
public static async Task WithEventStore()
{
var connectionString = "esdb://localhost:2113?tls=true&tlsVerifyCert=false";
var settings = EventStoreClientSettings.Create(connectionString);
settings.DefaultCredentials = new UserCredentials("admin", "changeit");
var esClient = new EventStoreClient(settings);
var esPersistenSubscriptionClient = new EventStorePersistentSubscriptionsClient(settings);
var projection = await CreateProjection(settings, persistent : true);
Console.ReadLine();
repository = new EventStoreRepository <Counter>(esClient);
for (int i = 0; i < 10; i++)
{
var counterId = Guid.NewGuid(); // Guid.Parse("fbb0f16b-646a-45d3-a1ee-596217897b61");
await CreateAndSaveCounter(counterId);
await LoadAndUpdateCounter(counterId);
}
Console.ReadLine();
projection.Unsubscribe();
}
public MainProgram(IStoreEvents master, IStoreEvents mirror)
{
_master = master;
_mirror = mirror;
_replicationPipeine = new Mirroror(_master, _mirror);
_mirrorClient = new EventStoreClient(_mirror.Advanced, 50);
}
public GeneralLedgerModule(EventStoreClient eventStore,
IMessageTypeMapper messageTypeMapper, JsonSerializerOptions serializerOptions)
{
Build <OpenGeneralLedger>()
.Log()
.UnitOfWork(eventStore, messageTypeMapper, serializerOptions)
.Handle((_, ct) => {
var(unitOfWork, command) = _;
var handlers =
new GeneralLedgerHandlers(
new GeneralLedgerEventStoreRepository(eventStore, messageTypeMapper, unitOfWork),
new GeneralLedgerEntryEventStoreRepository(eventStore, messageTypeMapper, unitOfWork),
new ChartOfAccountsEventStoreRepository(eventStore, messageTypeMapper, unitOfWork));
return(handlers.Handle(command, ct));
});
Build <BeginClosingAccountingPeriod>()
.Log()
.UnitOfWork(eventStore, messageTypeMapper, serializerOptions)
.Handle((_, ct) => {
var(unitOfWork, command) = _;
var handlers =
new GeneralLedgerHandlers(
new GeneralLedgerEventStoreRepository(eventStore, messageTypeMapper, unitOfWork),
new GeneralLedgerEntryEventStoreRepository(eventStore, messageTypeMapper, unitOfWork),
new ChartOfAccountsEventStoreRepository(eventStore, messageTypeMapper, unitOfWork));
return(handlers.Handle(command, ct));
});
}
public EventStoreReadOnlyRepository(IHoldAllConfiguration configs, EventStoreClient esClient)
{
new EventStoreClient(EventStoreClientSettings.Create("esdb://localhost:2113?tls=false"));
this.configs = configs ?? throw new ArgumentNullException(nameof(configs));
reader = new EventReader(esClient, configs);
}
private static async Task AppendWithNoStream(EventStoreClient client)
{
#region append-with-no-stream
var eventDataOne = new EventData(
Uuid.NewUuid(),
"some-event",
Encoding.UTF8.GetBytes("{\"id\": \"1\" \"value\": \"some value\"}")
);
var eventDataTwo = new EventData(
Uuid.NewUuid(),
"some-event",
Encoding.UTF8.GetBytes("{\"id\": \"2\" \"value\": \"some other value\"}")
);
await client.AppendToStreamAsync(
"no-stream-stream",
StreamState.NoStream,
new List <EventData> {
eventDataOne
});
// attempt to append the same event again
await client.AppendToStreamAsync(
"no-stream-stream",
StreamState.NoStream,
new List <EventData> {
eventDataTwo
});
#endregion append-with-no-stream
}
/// <summary>
/// Creates EventStoreDB catch-up subscription service for a given stream
/// </summary>
/// <param name="eventStoreClient">EventStoreDB gRPC client instance</param>
/// <param name="streamName">Name of the stream to receive events from</param>
/// <param name="subscriptionId">Subscription ID</param>
/// <param name="checkpointStore">Checkpoint store instance</param>
/// <param name="eventSerializer">Event serializer instance</param>
/// <param name="eventHandlers">Collection of event handlers</param>
/// <param name="loggerFactory">Optional: logger factory</param>
/// <param name="measure">Optional: gap measurement for metrics</param>
/// <param name="throwOnError"></param>
public StreamSubscription(
EventStoreClient eventStoreClient,
string streamName,
string subscriptionId,
ICheckpointStore checkpointStore,
IEnumerable <IEventHandler> eventHandlers,
IEventSerializer?eventSerializer = null,
ILoggerFactory?loggerFactory = null,
ISubscriptionGapMeasure?measure = null,
bool throwOnError = false
) : this(
eventStoreClient,
new StreamSubscriptionOptions {
StreamName = streamName,
SubscriptionId = subscriptionId,
ThrowOnError = throwOnError
},
checkpointStore,
eventHandlers,
eventSerializer,
loggerFactory,
measure
)
{
}
private static async Task AppendWithSameId(EventStoreClient client)
{
#region append-duplicate-event
var eventData = new EventData(
Uuid.NewUuid(),
"some-event",
Encoding.UTF8.GetBytes("{\"id\": \"1\" \"value\": \"some value\"}")
);
await client.AppendToStreamAsync(
"same-event-stream",
StreamState.Any,
new List <EventData> {
eventData
});
// attempt to append the same event again
await client.AppendToStreamAsync(
"same-event-stream",
StreamState.Any,
new List <EventData> {
eventData
});
#endregion append-duplicate-event
}
protected async Task ExecuteAsync(CancellationToken cancellationToken)
{
#region createClient
var settings = EventStoreClientSettings
.Create("{connectionString}");
var client = new EventStoreClient(settings);
#endregion createClient
#region createEvent
var evt = new TestEvent {
EntityId = Guid.NewGuid().ToString("N"),
ImportantData = "I wrote my first event!"
};
var eventData = new EventData(
Uuid.NewUuid(),
"TestEvent",
JsonSerializer.SerializeToUtf8Bytes(evt)
);
#endregion createEvent
#region writingEvent
await client.AppendToStreamAsync(
"testStream",
StreamState.Any,
new[] { eventData },
cancellationToken : cancellationToken
);
#endregion writingEvent
}
public static async Task <int> Main(string[] args)
{
Log.Logger = new LoggerConfiguration()
.MinimumLevel.Verbose()
.WriteTo.Console()
.CreateLogger();
var eventStoreClient = new EventStoreClient(new EventStoreClientSettings {
LoggerFactory = new SerilogLoggerFactory()
});
await Task.WhenAll(Enumerable.Range(0, 100)
.Select(i => eventStoreClient.AppendToStreamAsync($"stream-{i}", StreamState.Any, new[] {
new EventData(Uuid.NewUuid(), "-", Array.Empty <byte>(), contentType: "application/octet-stream"),
})));
await new HostBuilder()
.ConfigureHostConfiguration(builder => builder
.AddEnvironmentVariables("DOTNET_")
.AddCommandLine(args ?? Array.Empty <string>()))
.ConfigureAppConfiguration(builder => builder
.AddEnvironmentVariables()
.AddCommandLine(args ?? Array.Empty <string>()))
.ConfigureLogging(logging => logging.AddSerilog())
.ConfigureWebHostDefaults(builder => builder
.UseKestrel()
.ConfigureServices(services => services.AddCors().AddRouting())
.Configure(app => app
.UseEventStoreHALBrowser()
.UseEventStoreHAL(eventStoreClient)))
.RunConsoleAsync();
return(0);
}
public PrimeOnlyGrain(ILoggerFactory factory, EventStoreClient eventStore)
{
_logger = factory.CreateLogger <PrimeOnlyGrain>();
_client = eventStore;
_observer = new RXObserver <int>(factory, (int number) => this.UpdateAsync(number));
}
public AllPersistentSubscription(
EventStoreClient eventStoreClient,
AllPersistentSubscriptionOptions options,
ConsumePipe consumePipe
) : base(eventStoreClient, options, consumePipe)
{
}
static async Task Main(string[] args)
{
// run against
// .\EventStore-OSS-Windows-2019-v20.6.1\EventStore.ClusterNode.exe --insecure
// make sure http://localhost:2113 works
var connectionString = "esdb://*****:*****@localhost:2113/?TlsVerifyCert=false&Tls=false";
// run against
// .\EventStore-OSS-Windows-2019-v20.6.0\EventStore.ClusterNode.exe --dev
// make sure https://localhost:2113 works
//var connectionString = "esdb://*****:*****@localhost:2113/?TlsVerifyCert=false";
var settings = EventStoreClientSettings.Create(connectionString);
var client = new EventStoreClient(settings);
await client.SubscribeToAllAsync(EventAppeared);
Console.WriteLine("Subscribed to all events.");
var data = Encoding.UTF8.GetBytes("{}");
var eventData = new EventData(Uuid.NewUuid(), "test-event", data);
await client.AppendToStreamAsync("test-events", StreamState.Any, new[] { eventData });
Console.WriteLine("Keypress to exit.");
Console.ReadKey();
}
public async Task SaveAndGetEventsInChunks()
{
Random random = new Random();
Guid id = random.NextGuid();
PseudoAggregateRoot aggregateRoot = PseudoAggregateRoot.Create(id, "my name");
Int32 amount = 10_000;
for (int i = 0; i < amount; i++)
{
aggregateRoot.ChangeName($"iteration {i}");
}
var settings = EventStoreClientSettings.Create("esdb://127.0.0.1:2113?tls=false");
var client = new EventStoreClient(settings);
String prefix = random.GetAlphanumericString();
EventStoreBasedStore store = new(new EventStoreBasedStoreConnenctionOptions(client, prefix));
try
{
await store.Save(aggregateRoot);
var events = await store.GetEvents <PseudoAggregateRoot>(id, 10);
Assert.Equal(amount + 1, events.Count());
Assert.Equal($"iteration {amount - 1}", ((PseudoAggregateRootNameChangedEvent)events.Last()).SecondName);
}
finally
{
await EventStoreClientDisposer.CleanUp(prefix, settings);
}
}
public ToDoController(
ToDoListContext dbContext,
EventStoreClient eventStoreClient)
{
this.dbContext = dbContext;
this.eventStoreClient = eventStoreClient;
}
internal Task Should_Throw_On_DeleteSubscription_When_ConsumerGroup_IsNull(
EventStoreClient sut,
CancellationToken cancellationToken)
=> FluentActions
.Awaiting(() => sut.DeleteSubscriptionAsync(null, cancellationToken))
.Should()
.ThrowAsync <ArgumentNullException>();
public ProjectionRunner(EventStoreClient client, ILogger <ProjectionRunner> logger,
Projection[] projections)
{
_client = client;
_logger = logger;
_projections = projections;
}
public StreamPersistentSubscription(
EventStoreClient eventStoreClient,
StreamPersistentSubscriptionOptions options,
IEnumerable <IEventHandler> eventHandlers,
IEventSerializer?eventSerializer = null,
ILoggerFactory?loggerFactory = null,
ISubscriptionGapMeasure?measure = null
) : base(
eventStoreClient,
options,
new NoOpCheckpointStore(),
eventHandlers,
eventSerializer,
loggerFactory,
measure
)
{
Ensure.NotEmptyString(options.Stream, nameof(options.Stream));
var settings = eventStoreClient.GetSettings().Copy();
var opSettings = settings.OperationOptions.Clone();
options.ConfigureOperation?.Invoke(opSettings);
settings.OperationOptions = opSettings;
_subscriptionClient = new EventStorePersistentSubscriptionsClient(settings);
_handleEventProcessingFailure = options.FailureHandler ?? DefaultEventProcessingFailureHandler;
_options = options;
}
private static EventStoreClient CreateEventStoreClientWithConnection()
{
/** https://discuss.eventstore.com/t/basic-eventstoredb-v20-example/2553
* read this for settings workaround for certificate issues when trying out the client
* I didn't have this problem but if you are running event store in --dev mode this might be an issue'
* @see example code in .Writer project (same as in link above)
*/
var settings = new EventStoreClientSettings
{
ConnectivitySettings = new EventStoreClientConnectivitySettings
{
/*
* Note: gRPC uses the https and thus needs to use port 2113 (same as admin UI),
* instead of 1113 as the tcp client uses.
*/
Address = new Uri("https://localhost:2113/")
}
};
var client = new EventStoreClient(settings);
return(client);
/*
* In this example we used the EventStoreConnection.Create() overloaded method but others are available.
* https://eventstore.com/docs/dotnet-api/code/EventStore.ClientAPI.EventStoreConnection.html
* instead of using tcp for the client connection gRPC is recommended. (but not yet in documentation)
*/
}
private App()
{
var settings = new DefaultHandlerSettings(
new HandlerModule(),
new DefaultRequestTypeResolver("cedar", Enumerable.Empty <Type>()));
var commitDispatcherFailed = new TaskCompletionSource <Exception>();
//MidFunc blah = CommandHandlingMiddleware.HandleCommands(settings);
//_middleware = CreateGate(commitDispatcherFailed.Task)
_middleware = CommandHandlingMiddleware.HandleCommands(settings);
_storeEvents = Wireup.Init().UsingInMemoryPersistence().Build();
var eventStoreClient = new EventStoreClient(_storeEvents.Advanced);
_durableCommitDispatcher = new DurableCommitDispatcher(
eventStoreClient,
new InMemoryCheckpointRepository(),
new HandlerModule(),
TransientExceptionRetryPolicy.Indefinite(TimeSpan.FromMilliseconds(500)));
_durableCommitDispatcher.ProjectedCommits.Subscribe(
_ => { },
commitDispatcherFailed.SetResult);
_durableCommitDispatcher.Start().Wait();
}
public StatsSubscriber(EventStoreClient eventStoreClient, string subscriptionId,
ICheckpointStore checkpointStore, IEventSerializer eventSerializer,
IEnumerable <IEventHandler> eventHandlers, ILoggerFactory loggerFactory = null,
IEventFilter eventFilter = null, SubscriptionGapMeasure measure = null) : base(eventStoreClient,
subscriptionId, checkpointStore, eventSerializer, eventHandlers, loggerFactory, eventFilter, measure)
{
}
public NEventStoreProjectionDispatcher(
EventStoreClient eventStoreClient,
IProjectionHandlerResolver handlerResolver,
ICheckpointRepository checkpointRepository)
: base(handlerResolver, checkpointRepository)
{
_eventStoreClient = eventStoreClient;
}
public async Task Blah()
{
using(var eventStore = Wireup
.Init()
.UsingInMemoryPersistence()
.Build())
{
using(var client = new EventStoreClient(eventStore.Advanced))
{
var handlerResolver = new ProjectionHandlerResolver(new TestProjectionModule());
var dispatcher = new NEventStoreProjectionDispatcher(
client,
handlerResolver,
new InMemoryCheckpointRepository());
await dispatcher.Start();
}
}
}
public void SetUp()
{
_connectionFactory = new EmbeddedEventStoreConnectionFactory();
_eventStoreClient = new EventStoreClient(_connectionFactory, new ConsoleLoggerFactory());
}
