public void Accrue(RentalAgreement agreement)
{
// defensive programming
if (agreement == null)
{
throw new ArgumentNullException("agreement");
}
// logging
Console.WriteLine("Accrue: {0}", DateTime.Now);
Console.WriteLine("Customer: {0}", agreement.Customer.Id);
Console.WriteLine("Vehicle: {0}", agreement.Vehicle.Id);
var rentalTimeSpan =
(agreement.EndDate.Subtract(agreement.StartDate));
var numberOfDays = (int)Math.Floor(rentalTimeSpan.TotalDays);
var pointsPerDay = 1;
if (agreement.Vehicle.Size >= Size.Luxury)
{
pointsPerDay = 2;
}
var points = numberOfDays * pointsPerDay;
_loyaltyDataService.AddPoints(agreement.Customer.Id, points);
// logging
Console.WriteLine("Accrue complete: {0}", DateTime.Now);
}
/// <summary>
/// 该方法包含了积分系统累积客户积分的逻辑和规则
/// </summary>
/// <param name="agreement">租赁协议实体</param>
public void Accrue(RentalAgreement agreement)
{
//防御性编程
if (agreement == null)
{
throw new Exception("agreement为null！");
}
//日志
Console.WriteLine("Accrue:{0}", DateTime.Now);
Console.WriteLine("Customer:{0}", agreement.Customer.Id);
Console.WriteLine("Vehicle:{0}", agreement.Vehicle.Id);
try
{
using (var ts = new TransactionScope()) //开始一个新事务
{
var retries = 3; //重试事务3次
var succeeded = false;
while (!succeeded) //一直循环，直到成功
{
try
{
var rentalTimeSpan = agreement.EndDate.Subtract(agreement.StartDate);
var numberOfDays = (int)rentalTimeSpan.TotalDays;
var pointsPerDay = 1;
if (agreement.Vehicle.Size >= Size.Luxury)
{
pointsPerDay = 2;
}
var points = numberOfDays * pointsPerDay;
//调用数据服务存储客户获得的积分
_loyaltyDataService.AddPoints(agreement.Customer.Id, points);
ts.Complete(); //调用Complete方法表明事务成功提交
succeeded = true; //成功后设置为true，确保最后一次循环迭代
Console.WriteLine("Accrue Complete：{0}", DateTime.Now); //这句移入try里
}
catch
{
if (retries >= 0)
{
retries--;//直到尝试完次数时才重抛异常
}
else
{
throw;//没有调用Complete方法，事务会回滚
}
}
}
}
}
catch (Exception ex)
{
if (!ExceptionHelper.Handle(ex))//如果没有处理异常，继续重抛
{
throw ex;
}
}
}
public void Accrue(RentalAgreement agreement)
{
var rentalTime = agreement.EndDate.Subtract(agreement.StartDate);
var days = (int)Math.Floor(rentalTime.TotalDays);
var pointsPerDay = 1;
if (agreement.Vehicle.Size >= Size.Luxury)
{
pointsPerDay = 2;
}
var totalPoints = days * pointsPerDay;
_loyaltyDataService.AddPoints(agreement.Customer.Id, totalPoints);
}
/// <summary>
/// 包含积分系统累计客户积分逻辑和规则
/// </summary>
/// <param name="agreement"></param>
public void Accrue(RentalAgreement agreement)
{
var rentalTimeSpan = agreement.EndDate.Subtract(agreement.StartDate);
var numberOfDays = (int)rentalTimeSpan.TotalDays;
var pointsPerDay = 1;
if (agreement.Vehicle.Size >= Size.Luxury)
{
pointsPerDay = 2;
}
var points = pointsPerDay * numberOfDays;
// 调用数据服务存储客户获得的积分
_loyaltyDataService.AddPoints(agreement.Customer.Id, points);
}
public void Accrue(RentalAgreement agreement)
{
var pointsPerDay = 1;
var rentalTimeSpan = agreement.EndDate.Subtract(agreement.StartDate);
var numberOfDays = (int)Math.Floor(rentalTimeSpan.TotalDays);
if (agreement.Vehicle.Size > Size.FullSize)
{
pointsPerDay = 2;
}
var totalPoints = numberOfDays * pointsPerDay;
_dataService.AddPoints(agreement.Customer.Id, totalPoints);
}
public void Accrue(RentalAgreement agreement)
{
// Add Defensive Programming
if (agreement == null)
{
throw new ArgumentNullException(nameof(agreement));
}
// Add Logging
Console.WriteLine($"Accrue : {DateTime.Now}");
Console.WriteLine($"Customer: {agreement.Customer.Id}");
Console.WriteLine($"Vehicule: {agreement.Vehicule.Id}");
// Add More exception Handling
try {
// Add Transaction
using (var scope = new TransactionScope()) {
// Add Retry logic
var retries = 3;
var succeded = false;
while (!succeded)
{
try {
// Business logic
var rentalTimeSpan = agreement.EndDate.Subtract(agreement.StartDate);
var numberOfDays = (int)Math.Floor(rentalTimeSpan.TotalDays);
var pointsPerDay = 1;
if (agreement.Vehicule.Size >= Size.Luxury)
{
pointsPerDay = 2;
}
var points = numberOfDays * pointsPerDay;
_loyaltyDataService.AddPoints(agreement.Customer.Id, points);
// Business logic
// Complete transaction
scope.Complete();
succeded = true;
// Add Logging
Console.WriteLine($"Accrue complete: {DateTime.Now}");
} catch {
// Don't rethrow until the limit is reached
if (retries >= 0)
{
retries--;
}
else
{
throw;
}
}
}
}
} catch (Exception ex) {
// Some exception handling logic. The Book code doesn't work. Something missing?
//if (!ExceptionHandler.Handle(ex))
// throw;
}
}
public void Accrue(RentalAgreement agreement)
{
// defensive programming
if (agreement == null)
{
throw new ArgumentNullException(nameof(agreement));
}
// logging
Console.WriteLine("Accrue: {0}", DateTime.Now);
Console.WriteLine("Customer: {0}", agreement.Customer.Id);
Console.WriteLine("Vehicle: {0}", agreement.Vehicle.Id);
// exception handling
try
{
// start new transaction
using (var scope = new TransactionScope())
{
// retry up to three times
var retries = 3;
var succeeded = false;
while (!succeeded)
{
try
{
var rentalTime =
(agreement.EndDate.Subtract(
agreement.StartDate));
var days = (int)Math.Floor(rentalTime.TotalDays);
var pointsPerDay = 1;
if (agreement.Vehicle.Size >= Size.Luxury)
{
pointsPerDay = 2;
}
var pts = days * pointsPerDay;
_dataService.AddPoints(agreement.Customer.Id, pts);
// complete transaction
scope.Complete();
succeeded = true;
}
catch
{
// don't re-throw until the
// retry limit is reached
if (retries >= 0)
{
retries--;
}
else
{
throw;
}
}
}
}
}
catch (Exception ex)
{
if (!Exceptions.Handle(ex))
{
throw;
}
}
// logging
Console.WriteLine("Accrue complete: {0}", DateTime.Now);
}