/// <summary>
/// 在事物中执行一个不需要返回结果的函数，该函数可接收一个已初始化的 IEntityContext 参数。
/// 如果在执行过程中发生并发冲突，则会额外进行 concurrencyRetryCount 参数指定次数的重试，默认执行 1 次重试。
/// </summary>
/// <param name="action">要在事物中执行的函数。</param>
/// <param name="concurrencyRetryCount">并发重试次数。</param>
public static void ExecuteInTransition(Action <IEntityContext> action, int concurrencyRetryCount = 1)
{
int retryCount = 0;
while (true)
{
using (IEntityContext entityContext = EntityContextFactory.CreateEntityContext())
{
try
{
entityContext.BeginTransaction();
action(entityContext);
entityContext.Commit();
break;
}
catch (EntityConcurrencyException)
{
entityContext.Rollback();
retryCount++;
if (retryCount > concurrencyRetryCount)
{
throw;
}
continue;
}
catch
{
entityContext.Rollback();
throw;
}
}
}
}
/// <summary>
/// 在事物中执行一个需要返回结果的函数，该函数可接收一个已初始化的 IEntityContext 参数。
/// 如果在执行过程中发生并发冲突，则会额外进行 concurrencyRetryCount 参数指定次数的重试，默认执行 1 次重试。
/// </summary>
/// <typeparam name="TResult">函数执行结果的类型。</typeparam>
/// <param name="func">要在事物中执行的函数。</param>
/// <param name="concurrencyRetryCount">并发重试次数。</param>
/// <returns>函数执行的结果。</returns>
public static TResult ExecuteInTransition <TResult>(Func <IEntityContext, TResult> func, int concurrencyRetryCount = 1)
{
int retryCount = 0;
while (true)
{
using (IEntityContext entityContext = EntityContextFactory.CreateEntityContext())
{
try
{
entityContext.BeginTransaction();
var result = func(entityContext);
entityContext.Commit();
return(result);
}
catch (EntityConcurrencyException)
{
entityContext.Rollback();
retryCount++;
if (retryCount > concurrencyRetryCount)
{
throw;
}
continue;
}
catch
{
entityContext.Rollback();
throw;
}
}
}
}
public void BeginTransaction()
{
_context.BeginTransaction();
}