protected async Task DeleteItemIfAsync(IMessage message, Func <T, bool> predicate)
{
async Task DoAsync()
{
var lockId = GetLockId(message);
await LockProvider.TryUsingAsync(lockId,
async token =>
{
var item = await LoadItemAsync(message).ConfigureAwait(false);
if (item.Entity == null)
{
return;
}
if (!item.IsNew)
{
if (predicate(item.Entity))
{
await DeleteAsync(item.Id,
message,
CreateIdentifierItem).ConfigureAwait(false);
}
}
}, cancellationToken : CancellationToken.None).ConfigureAwait(false);
}
await LockProvider.TryUsingAsync(GetCacheLockId(), async() => await DoAsync().ConfigureAwait(false), timeUntilExpires : null, cancellationToken : CancellationToken.None).ConfigureAwait(false);
}
protected async Task LoadAndSaveOnlyExistingAsync(IMessage message, Action <T> setValues = null)
{
var lockId = GetLockId(message);
await LockProvider.TryUsingAsync(lockId,
async token =>
{
var item = await LoadItemAsync(message).ConfigureAwait(false);
var entity = item.Entity;
if (item.IsNew)
{
Logger.LogTrace("Skipping new Item");
}
else
{
if (entity == null)
{
Logger.LogTrace("No Valid Entity Loaded");
}
else
{
setValues?.Invoke(entity);
// await SaveItemAsync(item, message, state);
await SaveItemAsync(item, message).ConfigureAwait(false);
}
}
}, cancellationToken : CancellationToken.None).ConfigureAwait(false);
}
private string GetLockId(IMessage evnt)
{
var lockId = $"{EntityTypeKey}-{CreateLockId(evnt)}";
if (string.IsNullOrEmpty(lockId))
{
lockId = Guid.NewGuid().ToString();
}
return(lockId);
}
private async Task SaveItemAsync(EntityDescriptor <T> item, IMessage domainEvent)
{
async Task DoAsync()
{
if (Context.IsLiveProcessing)
{
await SaveAsync(item, domainEvent, CreateIdentifierItem(item.Entity)).ConfigureAwait(false);
}
else
{
await SaveAsync(item, domainEvent, null).ConfigureAwait(false);
}
await Cache.RemoveByPrefixAsync(EntityTypeKey).ConfigureAwait(false);
}
await LockProvider.TryUsingAsync(GetCacheLockId(), async() => await DoAsync().ConfigureAwait(false), timeUntilExpires : null, cancellationToken : CancellationToken.None).ConfigureAwait(false);
}
protected async Task DeleteItemAsync(IMessage message)
{
async Task DoAsync()
{
var item = await LoadItemAsync(message).ConfigureAwait(false);
if (item.Entity == null)
{
return;
}
if (!item.IsNew)
{
await base.DeleteAsync(item.Id,
message,
CreateIdentifierItem).ConfigureAwait(false);
//,state: state);
}
}
await LockProvider.TryUsingAsync(GetCacheLockId(), async() => await DoAsync().ConfigureAwait(false), timeUntilExpires : null, cancellationToken : CancellationToken.None).ConfigureAwait(false);
}
protected abstract Task <EntityDescriptor <T> > LoadItemAsync(IMessage message);
protected abstract string CreateLockId(IMessage message);
