/// <summary>
/// Checks whether the row version for a sales transaction is valid or not.
/// </summary>
/// <param name="context">The database context.</param>
/// <param name="transactionId">The sales transaction identifier.</param>
/// <param name="rowversion">The row version value.</param>
/// <remarks>An exception is thrown for a invalid row version.</remarks>
/// <returns>Transaction's created date time.</returns>
private static DateTime RetrieveTransactionCreatedDateOrThrowOnInvalidRowVersion(SqliteDatabaseContext context, string transactionId, byte[] rowversion)
{
const string GetRowVersionQueryString =
"SELECT {0}, {1} FROM [crt].SALESTRANSACTION WHERE TRANSACTIONID = @TRANSACTIONID;";
var query = new SqlQuery(GetRowVersionQueryString, RowversionColumnName, CreatedDateTimeColumName);
query.Parameters["@TRANSACTIONID"] = transactionId;
byte[] savedRowverion = null;
// default created time as utc now
DateTime createdDateTime = DateTime.UtcNow;
SalesTransactionData transactionData = context.ReadEntity <SalesTransactionData>(query).FirstOrDefault();
if (transactionData != null)
{
savedRowverion = transactionData.Version;
// update created date time value in case it exists in the db
createdDateTime = transactionData.CreatedDateTime.DateTime;
}
// null is fine since the record does not exist yet, otherwise compare to see if they match
if (savedRowverion != null && !RowVersionHelper.AreEquals(rowversion, savedRowverion))
{
throw new StorageException(StorageErrors.Microsoft_Dynamics_Commerce_Runtime_ObjectVersionMismatchError, "Version mismatch while saving transaction.");
}
return(createdDateTime);
}
static MachineDtoMapper()
{
Mapper.CreateMap <Machine, MachineDto>()
.ForMember(d => d.Version, x => x.MapFrom(y => RowVersionHelper.ConvertToString(y.RowVersion)));
Mapper.CreateMap <Credentials, CredentialsDto>();
}
/// <summary>
/// Creates and adds a data row based on the sales transaction data contents.
/// </summary>
/// <param name="table">The data table to be populated.</param>
/// <param name="salesTransactionData">The sales transaction data.</param>
/// <param name="createdDateTime">The transaction's created date time.</param>
private static void AddSalesTransactionDataRow(DataTable table, SalesTransactionData salesTransactionData, DateTime createdDateTime)
{
// no out of the box rowversion support in sqlite, increment value here
salesTransactionData.Version = RowVersionHelper.Increment(salesTransactionData.Version);
DataRow row = salesTransactionData.CreateDataRow(table);
// all fields must be set otherwise the insert or update query will clear them out
row[CreatedDateTimeColumName] = createdDateTime;
row[ModifiedDateTimeColumnName] = DateTime.UtcNow;
table.Rows.Add(row);
}
public void Can_convert_between_string_and_byte_array()
{
var bytes = new byte[] { 255, 24 };
var str = RowVersionHelper.ConvertToString(bytes);
var resultBytes = RowVersionHelper.ConvertToBytes(str);
var resultStr = RowVersionHelper.ConvertToString(resultBytes);
Assert.AreEqual(bytes, resultBytes);
Assert.AreEqual(str, resultStr);
}
// PUT /api/machines/5
public HttpResponseMessage Put(int id, [FromBody] MachineDto machineDto)
{
//zero is passed back if the top 'null' option is selected inthe web form drop-down
// if (machineDto.CredentialsId == 0) machineDto.CredentialsId = null;
//validate
if (!ModelState.IsValid)
{
_logger.Error("MachinesController.Put failed: model state not valid");
throw new HttpResponseException(new HttpResponseMessage
{
StatusCode = HttpStatusCode.BadRequest,
Content = new StringContent("Model state not valid")
});
}
var machine = _unitOfWork.Machines.GetById(id);
//check a machine exists
if (machine == null)
{
throw new HttpResponseException(new HttpResponseMessage
{
StatusCode = HttpStatusCode.NotFound,
Content = new StringContent("Machine not found")
});
}
//all's well - so update the machine
//but first, validate that the data hasn't been changed by another user since we loaded it
var machineRV = RowVersionHelper.ConvertToString(machine.RowVersion);
if (machineRV != machineDto.Version)
{
_logger.Error("Concurrency exception - mismatched rowversions : " + machineRV + " | " + machineDto.Version);
throw new HttpResponseException(new HttpResponseMessage
{
StatusCode = HttpStatusCode.BadRequest,
Content = new StringContent("Concurrency exception")
});
}
machine.Update(machineDto);
_unitOfWork.Commit();
var response = Request.CreateResponse(HttpStatusCode.NoContent);
//pass the updated rowversion info back in an eTag
var version = RowVersionHelper.ConvertToString(machine.RowVersion);
response.Headers.ETag = new EntityTagHeaderValue((QuotedString)version, true);
return(response);
}
