我正在从事一个审计跟踪项目，我们被告知要跟进。
使用影子表跟踪我们数据库中的所有表（200+），就像 Hibernate Envers 一样。因此，我们为涉及 CUD 的每个事务创建了快照。
过去，我为每个客户实施了针对有限的重要数据集的审计解决方案。对于目前的工作，我的问题是：
【问题讨论】：
完全实现，可以进一步改进。我希望这可以帮助某人：
public partial class Entity:DbContext
{
public enum AuditActions {I,U,D}
public override int SaveChanges( )
{
ChangeTracker.DetectChanges();
ObjectContext ctx = ((IObjectContextAdapter)this).ObjectContext;
// string UserName = WindowsIdentity.GetCurrent().Name;
IPrincipal principal = Thread.CurrentPrincipal;
IIdentity identity = principal == null ? null : principal.Identity;
string name = identity == null ? "" : identity.Name;
//Thread.CurrentPrincipal = new GenericPrincipal(new GenericIdentity((userName), roles);
List<ObjectStateEntry> objectStateEntryList =
ctx.ObjectStateManager.GetObjectStateEntries(EntityState.Added
| EntityState.Modified
| EntityState.Deleted)
.ToList();
List<DBAudit> AuditList = new List<DBAudit>();
string Audittable = string.Empty;
foreach (ObjectStateEntry entry in objectStateEntryList)
{
Audittable = entry.EntitySet.ToString();
if (!entry.IsRelationship && Audittable!="Audit table name")
{
//sIsAuditTble =entry.EntitySet="DBAudit"? true:false;
switch (entry.State)
{
case EntityState.Added:
AuditList= LogDetails(entry, name, AuditActions.I);
break;
case EntityState.Deleted:
AuditList= LogDetails(entry, name, AuditActions.D);
break;
case EntityState.Modified:
AuditList= LogDetails(entry, name, AuditActions.U);
break;
}
}
}
using (var context = new ProjectTrackerEntities())
{
for (int i = 0; i < AuditList.Count; i++)
{
context.DBAudits.Add(AuditList[i]);
context.SaveChanges();
}
}
return base.SaveChanges();
}
public List<DBAudit> LogDetails(ObjectStateEntry entry, string UserName, AuditActions action)
{
List<DBAudit> dbAuditList = new List<DBAudit>();
if (action == AuditActions.I)
{
var keyValues = new Dictionary<string, object>();
var currentValues = entry.CurrentValues;
// entry.Entity key = new EntityKey();
DBAudit audit = new DBAudit();
audit.AuditId = Guid.NewGuid().ToString();
audit.RevisionStamp = DateTime.Now;
audit.TableName = entry.EntitySet.Name;
audit.UserName = UserName;
audit.OldData = "";
audit.Actions = action.ToString();
for (int i = 0; i < currentValues.FieldCount; i++)
{
audit.ChangedColumns = audit.ChangedColumns + currentValues.GetName(i);
audit.NewData = audit.NewData + currentValues.GetValue(i);
audit.ChangedColumns = audit.ChangedColumns + ", ";
audit.NewData = audit.NewData + ", ";
}
dbAuditList.Add(audit);
//LogSave(audit);
}
else if (action == AuditActions.D)
{
var keyValues = new Dictionary<string, object>();
var DeletedValues = entry.OriginalValues;
// entry.Entity key = new EntityKey();
DBAudit audit = new DBAudit();
audit.AuditId = Guid.NewGuid().ToString();
audit.RevisionStamp = DateTime.Now;
audit.TableName = entry.EntitySet.Name;
audit.UserName = UserName;
audit.NewData = "";
audit.Actions = action.ToString();
for (int i = 0; i < DeletedValues.FieldCount; i++)
{
audit.ChangedColumns = audit.ChangedColumns + DeletedValues.GetName(i);
audit.OldData = audit.OldData + DeletedValues.GetValue(i);
audit.ChangedColumns = audit.ChangedColumns + ", ";
audit.OldData = audit.OldData + ", ";
}
dbAuditList.Add(audit);
}
else
{
foreach (string propertyName in entry.GetModifiedProperties())
{
DBAudit audit = new DBAudit();
DbDataRecord original = entry.OriginalValues;
string oldValue = original.GetValue(original.GetOrdinal(propertyName)).ToString();
CurrentValueRecord current = entry.CurrentValues;
string newValue = current.GetValue(current.GetOrdinal(propertyName)).ToString();
audit.AuditId = Guid.NewGuid().ToString();
audit.RevisionStamp = DateTime.Now;
audit.TableName = entry.EntitySet.Name;
audit.UserName = UserName;
audit.ChangedColumns = propertyName;
audit.OldData = oldValue;
audit.NewData = newValue;
audit.Actions = action.ToString();
dbAuditList.Add(audit);
//LogSave(audit);
}
}
return dbAuditList;
}
}
【讨论】：
NoSQL 数据库的一个选项是RavenDB，使用它的“versioning bundle”。
虽然现在可能还为时过早，但我最近听了一个有趣的 Herding code 插曲，他们在其中 talk with Eric Sink on about Veracity。据我了解，Veracity 部分是分布式版本控制系统，部分是 NoSQL 数据库。它被设计成任何东西的后端，从源代码控制系统到 wiki。它已经开发了几年，但实际上仍处于测试前阶段（截至 2010 年 11 月）。
【讨论】：