public void GivenHttpIdempotencySerializerShouldDeserializeIdempotencyRegister()
{
var expectedRegister = HttpIdempotencyRegister.Of("key", HttpStatusCode.OK,
new MemoryStream(Encoding.UTF8.GetBytes("body")));
var serializedObject = _serializer.Serialize(expectedRegister);
var register = _serializer.Deserialize <HttpIdempotencyRegister>(serializedObject);
register.Key.Should().Be(expectedRegister.Key);
register.IsCompleted.Should().Be(expectedRegister.IsCompleted);
register.StatusCode.Should().Be(HttpStatusCode.OK);
register.Value.Should().Be(expectedRegister.Value);
}
public async Task <T> GetAsync <T>(string key)
where T : IIdempotencyRegister
{
var value = await _database.StringGetAsync(key);
return(_serializer.Deserialize <T>(value));
}
public async Task <TResponse> Handle(TRequest request, CancellationToken cancellationToken,
RequestHandlerDelegate <TResponse> next)
{
var idempotencyKey = _keyReader?.Read(request);
if (string.IsNullOrWhiteSpace(idempotencyKey))
{
return(await next());
}
TResponse response;
_logger?.WriteInformation(idempotencyKey, "Idempotency: Key detected.");
if (await _repository.TryAddAsync(idempotencyKey))
{
_logger?.WriteRequest(idempotencyKey, "Idempotency: First request.", request);
try
{
response = await next();
}
catch (Exception ex)
{
await _repository.RemoveAsync(idempotencyKey);
_logger?.WriteException(idempotencyKey, ex);
throw;
}
if (response is IResult result && result.Failure)
{
await _repository.RemoveAsync(idempotencyKey);
_logger?.WriteInformation(idempotencyKey, "Idempotency: First request failed.");
return(response);
}
var updatedRegister =
IdempotencyRegister.Of(idempotencyKey, _idempotencySerializer.Serialize(response));
await _repository.UpdateAsync(idempotencyKey, updatedRegister);
_logger?.WriteInformation(idempotencyKey, "Idempotency: First request completed.");
return(response);
}
var register = await _repository.GetAsync <IdempotencyRegister>(idempotencyKey);
if (!register.IsCompleted)
{
_logger?.WriteResponse(idempotencyKey, "Idempotency: Conflict detected.", default);
throw new ConflictDetectedException(idempotencyKey);
}
response = _idempotencySerializer.Deserialize <TResponse>(register.Value);
_logger?.WriteResponse(idempotencyKey, "Idempotency: Conflict detected.", response);
return(response);
}