예제 #1
0
        public async Task CatchupSubscription_ReceivesEvents_Success()
        {
            var streamId           = $"TestStream-{Guid.NewGuid():N}";
            var credentials        = new UserCredentials("admin", "changeit");
            var connectionSettings = new ConnectionSettings(credentials, "127.0.0.1", 1113, "myConnection");
            var connection         = new EventStoreConnection(connectionSettings);
            await connection.ConnectAsync().ConfigureAwait(false);

            // First write a few events before the subscription
            const int initialEventCounter = 3;

            for (var i = 0; i < initialEventCounter; ++i)
            {
                await WriteRandomEventToStream(streamId, connection).ConfigureAwait(false);
            }

            // Start catchup subscription
            var totalEventsHandled = 0;
            var subscription       = await connection.CreateCatchupSubscription(streamId, 0, async e =>
            {
                Interlocked.Increment(ref totalEventsHandled);
            }).ConfigureAwait(false);


            const int afterEventCounter = 4;

            for (var i = 0; i < afterEventCounter; ++i)
            {
                await WriteRandomEventToStream(streamId, connection).ConfigureAwait(false);
            }

            const int attempts = 10;

            for (var i = 0; i < attempts; ++i)
            {
                if (Thread.VolatileRead(ref totalEventsHandled) == initialEventCounter + afterEventCounter)
                {
                    return;
                }
                await Task.Delay(500).ConfigureAwait(false);
            }
            throw new Exception($"Only {Thread.VolatileRead(ref totalEventsHandled)} events handled of expected {initialEventCounter + afterEventCounter}");
        }