我们正在与一个提供数据的外部系统进行集成。该系统包含有关客户许可证及其续订日期的信息。每个许可证或称为模型的
然而,对于需要续订大量许可证的客户,我们遇到了一些性能问题。这是因为我们需要检查下一个续订周期是否已经被订购但尚未处理,其他代码足够快(
客户可以不使用此系统即可更新其许可证,因此我们希望不向
以下是我们当前的模型和代码。有没有办法加快这个过程?我所能想到的是直接识别
如果在
Case(来自外部系统的模型):
TPCase
可以有多个续订周期TPRenewalCycle
。然后客户可以在我们的系统中下订单,许可证得到更新,新的续订周期开始。然而,对于需要续订大量许可证的客户,我们遇到了一些性能问题。这是因为我们需要检查下一个续订周期是否已经被订购但尚未处理,其他代码足够快(
db.OrderRows.Any(...
)客户可以不使用此系统即可更新其许可证,因此我们希望不向
OrderRow
添加可空外键来增加TPRenewalCycle
。以下是我们当前的模型和代码。有没有办法加快这个过程?我所能想到的是直接识别
tpCase.NextRenewalCycle
,然后检查OrderRows
中不存在任何值。如果在
Entity Framework
中很难实现,我们可能愿意直接使用T-SQL
,如果我们不必像现在这样进行检查。Case(来自外部系统的模型):
public class TPCase
{
[Key, Column(Order = 0)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string BusinessSystemId { get; set; }
[Key, Column(Order = 1)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int CaseId { get; set; }
public bool VisibleToClient { get; set; }
public virtual ICollection<TPCaseName> CaseNames { get; set; }
public virtual ICollection<TPRenewalCycle> RenewalCycles { get; set; }
[NotMapped]
public TPRenewalCycle NextRenewalCycle { get; set; }
}
public class TPCaseName
{
[Key, Column(Order = 0)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string BusinessSystemId { get; set; }
[Key, Column(Order = 1)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int CaseId { get; set; }
[Key, Column(Order = 2)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int NameNo { get; set; }
[Key, Column(Order = 3)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string NameType { get; set; }
[ForeignKey("BusinessSystemId,CaseId")]
public virtual TPCase TPCase { get; set; }
[ForeignKey("BusinessSystemId,NameNo")]
public virtual TPName TPName { get; set; }
public virtual TPNameType TPNameType { get; set; }
public string ContactName { get; set; }
}
public class TPName
{
[Key, Column(Order = 0)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string BusinessSystemId { get; set; }
[Key, Column(Order = 1)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int NameNo { get; set; }
public string Name { get; set; }
}
public class TPNameType
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string NameType { get; set; }
public string Description { get; set; }
}
public class TPRenewalCycle
{
[Key, Column(Order = 0)]
[ForeignKey("TPCase")]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string BusinessSystemId { get; set; }
[Key, Column(Order = 1)]
[ForeignKey("TPCase")]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int CaseId { get; set; }
public virtual TPCase TPCase { get; set; }
[Key, Column(Order = 2)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string Action { get; set; }
[Key, Column(Order = 3)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int Cycle { get; set; }
public bool? IsOpen { get; set; }
public virtual ICollection<TPCaseEvent> CaseEvents { get; set; }
}
public class TPCaseEvent
{
[Key, Column(Order = 0)]
[ForeignKey("TPRenewalCycle")]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string BusinessSystemId { get; set; }
[Key, Column(Order = 1)]
[ForeignKey("TPRenewalCycle")]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int CaseId { get; set; }
[Key, Column(Order = 2)]
[ForeignKey("TPRenewalCycle")]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string Action { get; set; }
[Key, Column(Order = 3)]
[ForeignKey("TPRenewalCycle")]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int Cycle { get; set; }
public virtual TPRenewalCycle TPRenewalCycle { get; set; }
[Key, Column(Order = 4)]
[ForeignKey("TPEvent")]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int EventNo { get; set; }
public virtual TPEvent TPEvent { get; set; }
public DateTime? DueDate { get; set; }
public DateTime? EventDate { get; set; }
}
public class TPEvent
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int EventNo { get; set; }
public string Name { get; set; }
[Column(TypeName = "nvarchar(MAX)")]
[MaxLength]
public string Description { get; set; }
}
订单(我们的模型):
public class Order
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
public DateTime Created { get; set; }
public DateTime Updated { get; set; }
public virtual ICollection<OrderRow> OrderRows { get; set; }
}
public class OrderRow
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
public DateTime Created { get; set; }
public DateTime Updated { get; set; }
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string BusinessSystemId { get; set; }
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int CaseId { get; set; }
[ForeignKey("BusinessSystemId,CaseId")]
public virtual TPCase TPCase { get; set; }
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public string Action { get; set; }
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int Cycle { get; set; }
[ForeignKey("BusinessSystemId,CaseId,Action,Cycle")]
public virtual TPRenewalCycle TPRenewalCycle { get; set; }
public int OrderId { get; set; }
public virtual Order Order { get; set; }
}
方法:
public IEnumerable<TPCase> GetRenewalCasesForCustomer(IList<int> customerNumberKeys)
{
var db = new DbContext();
var cases = db.Cases
.Where(tpCase =>
tpCase.VisibleToClient == true &&
tpCase.CaseNames.Any(
caseName => customerNumberKeys.Contains(caseName.NameNo) &&
caseName.BusinessSystemId == "EN" &&
caseName.NameType == "T") &&
tpCase.RenewalCycles.Any(
renewalCycle =>
renewalCycle.IsOpen == true &&
renewalCycle.Action == "RW" &&
renewalCycle.CaseEvents.Any(caseEvent =>
caseEvent.EventNo == -112 &&
caseEvent.DueDate >= DateTime.Now
))
)
.Include(tpCase => tpCase.CaseNames.Select(caseName => caseName.TPName))
.Include(tpCase => tpCase.CaseNames.Select(caseName => caseName.TPNameType))
.Include(tpCase => tpCase.RenewalCycles.Select(renewalCycle => renewalCycle.CaseEvents))
.ToList();
foreach (var tpCase in cases)
{
var cycles =
tpCase.RenewalCycles.Where(
x => x.IsOpen == true &&
x.Action == "RW" &&
x.CaseEvents.FirstOrDefault(y => y.EventNo == -112)?.DueDate != null &&
x.CaseEvents.Single(y => y.EventNo == -112)?.DueDate >= DateTime.Now)
.ToList();
if (cycles.Any())
{
var cycle = cycles.OrderBy(
x => x.CaseEvents.Single(y => y.EventNo == -11)?.DueDate)
.First();
tpCase.NextRenewalCycle = cycle;
}
}
for (int i = cases.Count - 1; i >= 0; i--)
{
var tpCase = cases[i];
if (tpCase.NextRenewalCycle == null)
{
cases.RemoveAt(i);
continue;
}
//This is the time consuming part where all the requests are made
var orderExist = db.OrderRows.Any(x =>
x.BusinessSystemId == tpCase.BusinessSystemId &&
x.CaseId == tpCase.CaseId &&
x.Action == tpCase.NextRenewalCycle.Action &&
x.Cycle == tpCase.NextRenewalCycle.Cycle
);
if (orderExist)
{
cases.RemoveAt(i);
}
}
return cases;
}