public void Wait_SecondEntryWithTheSameID_Is_BlockedUntilTheFirstResolvesTest()
{
// Arrange
List <Task> tasks = new List <Task>();
string id = "test";
bool firstRunning = false;
DateTime completionTimeOfFirstTask = DateTime.MinValue;
DateTime completionTimeOfSecondTask = DateTime.MinValue;
void FirstLock()
{
firstRunning = true;
_semaphoreOnEntity.Wait(id);
Thread.Sleep(LongSleepInterval);
_semaphoreOnEntity.Release(id);
completionTimeOfFirstTask = DateTime.UtcNow;
}
void SecondLock()
{
do
{
// Wait for first to start
Thread.Sleep(ShortSleepInterval);
}while (!firstRunning);
_semaphoreOnEntity.Wait(id);
_semaphoreOnEntity.Release(id);
completionTimeOfSecondTask = DateTime.UtcNow;
}
// Act
Task firstTask = Task.Run(FirstLock);
Task secondTask = Task.Run(SecondLock);
Task.WaitAll(new Task[] { firstTask, secondTask });
// Assert
completionTimeOfFirstTask.Should().BeBefore(completionTimeOfSecondTask);
}
/// <inheritdoc/>
public async Task CreateAsync(CreateContractRequest request)
{
await _semaphoreOnEntity.WaitAsync(request.ContractNumber).ConfigureAwait(false);
try
{
_logger.LogInformation($"[{nameof(CreateAsync)}] Creating new contract [{request.ContractNumber}] version [{request.ContractVersion}] for [{request.UKPRN}].");
var existing = await _repository.GetByContractNumberAsync(request.ContractNumber);
_contractValidator.ValidateForNewContract(request, existing);
var newContract = _mapper.Map <Repository.DataModels.Contract>(request);
newContract.LastUpdatedAt = newContract.CreatedAt = DateTime.UtcNow;
// For amendment type notification the default status has to be approved
// For None and Variation, it should be published to provider
if (request.AmendmentType == ContractAmendmentType.Notfication)
{
newContract.Status = (int)ContractStatus.Approved;
newContract.SignedOn = request.SignedOn.Value.Date;
newContract.SignedBy = "Feed";
newContract.SignedByDisplayName = "Feed";
}
else if (request.AmendmentType == ContractAmendmentType.None || request.AmendmentType == ContractAmendmentType.Variation)
{
newContract.Status = (int)ContractStatus.PublishedToProvider;
}
await _contractDocumentService.UpsertOriginalContractXmlAsync(newContract, new ContractRequest()
{
FileName = request.ContractData, ContractNumber = request.ContractNumber, ContractVersion = request.ContractVersion
});
await _repository.CreateAsync(newContract);
var updatedContractStatusResponse = new UpdatedContractStatusResponse
{
Id = newContract.Id,
ContractNumber = newContract.ContractNumber,
ContractVersion = newContract.ContractVersion,
Ukprn = newContract.Ukprn,
NewStatus = (ContractStatus)newContract.Status,
Action = ActionType.ContractCreated,
AmendmentType = request.AmendmentType
};
_logger.LogInformation($"[{nameof(CreateAsync)}] Contract [{newContract.ContractNumber}] version [{newContract.ContractVersion}] has been created for [{newContract.Ukprn}].");
// Update operations to existing records can be done outside the semaphore
if (request.AmendmentType == ContractAmendmentType.Variation || request.AmendmentType == ContractAmendmentType.None)
{
var statuses = new int[]
{
(int)ContractStatus.PublishedToProvider
};
await ReplaceContractsWithGivenStatuses(existing, statuses);
}
else if (request.AmendmentType == ContractAmendmentType.Notfication)
{
var statuses = new int[]
{
(int)ContractStatus.Approved,
(int)ContractStatus.ApprovedWaitingConfirmation,
(int)ContractStatus.PublishedToProvider
};
await ReplaceContractsWithGivenStatuses(existing, statuses);
}
await _mediator.Publish(updatedContractStatusResponse);
}
finally
{
_semaphoreOnEntity.Release(request.ContractNumber);
}
}