/// <summary>
/// https://stackoverflow.com/questions/26355486/entity-framework-6-audit-track-changes
/// </summary>
/// <param name="context"></param>
private void ModifyAuditableEntities(DbContext context)
{
var now = _dateTime.UtcNow;
var user = _identityService?.UserId ?? Guid.Empty;
var auditedEntities = context.ChangeTracker.Entries <IEntityAuditable>().ToList();
foreach (var added in auditedEntities.Where(p => p.State == EntityState.Added)
.Select(p => p.Entity))
{
added.Create(now, user);
}
foreach (var modified in auditedEntities.Where(p => p.State == EntityState.Modified)
.Select(p => p.Entity))
{
modified.Change(now, user);
}
var auditedLogicalRemoveEntities = context
.ChangeTracker
.Entries <IEntityAuditableLogicalRemove>()
.Where(p => p.State == EntityState.Deleted)
.ToList();
foreach (var removed in auditedLogicalRemoveEntities)
{
_customLogger.Verbose($"Logically deleting the entity {removed.Entity.GetType()}");
removed.Entity.Delete(now, user);
removed.State = EntityState.Modified;
}
}
public Task <T> GetOrCreateAsync <T>(string key, Func <Task <T> > generator, TimeSpan?timeSpan = null)
{
return(_memoryCache.GetOrCreateAsync(key, entry =>
{
_customLogger.Verbose($"Retrieving from cache {key}");
entry.SlidingExpiration = timeSpan;
return generator();
}));
}
/// <summary>
///
/// </summary>
/// <param name="request"></param>
/// <param name="cancellationToken">Propagates notification that operations should be canceled.</param>
/// <param name="next"></param>
/// <returns></returns>
public Task Handle(TRequest request, CancellationToken cancellationToken, Func <TRequest, CancellationToken, Task> next)
{
var name = typeof(TRequest).Name;
_timer.Start();
var response = next(request, cancellationToken);
_timer.Stop();
_logger.Verbose($"TimerBehaviour: {name} ({_timer.ElapsedMilliseconds} milliseconds) {request}");
return(response);
}
