private async Task BatchDeleteEntitiesAsync <TEntity>(Expression <Func <TEntity, bool> > predicate,
CancellationToken cancellationToken) where TEntity : class, IIdentityPrimaryKey, new()
{
using (var dbContext = _dbContextFactory.Create())
{
var entities = await dbContext
.Query <TEntity>()
.AsNoTracking()
.Where(predicate)
.Select(x => new TEntity {
Id = x.Id
})
.ToArrayAsync(cancellationToken).ConfigureAwait(false);
_logger.LogDebug($"{entities.Length} {typeof(TEntity).Name}(s) are ready to purge.");
var batchDeleteBlock = new BatchExecuteTargetBlock <TEntity>(
elements => RemoveEntitiesInternalAsync(elements, cancellationToken), Options.Concurrency,
cancellationToken);
foreach (var entity in entities)
{
_ = await batchDeleteBlock.SendAsync(entity, cancellationToken).ConfigureAwait(false);
}
batchDeleteBlock.Complete();
await batchDeleteBlock.Completion.AggregateExceptions <DataPurgingException>(
"Purging of PredictionSchedules data has been failed. See inner exception for more details.");
_logger.LogDebug(
$"Purging of {entities.Length} {typeof(TEntity).Name}(s) has been completed successfully according to the '{nameof(Options.DaysAfter)}' parameter.");
}
}
public override async Task ExecuteAsync(CancellationToken cancellationToken)
{
if (Options.DaysAfter == 0)
{
_logger.LogDebug(
$"'{nameof(Options.DaysAfter)}' configuration parameters hasn't been specified, execution skipped.");
return;
}
var thresholdDate = _clock.GetCurrentInstant().ToDateTimeUtc().AddDays(-Options.DaysAfter);
var campaignIds = await _dbContext.Query <Campaign>().AsNoTracking()
.Where(x => x.EndDateTime < thresholdDate)
.Select(x => x.Id).ToArrayAsync(cancellationToken).ConfigureAwait(false);
_logger.LogDebug(
$"'{nameof(Options.DaysAfter)}' parameter is set to {Options.DaysAfter} days. {campaignIds.Length} campaign(s) returned which end date less than {thresholdDate}.");
if (campaignIds.Length > 0)
{
var targetBlock = new BatchExecuteTargetBlock <Guid>(
ids => _campaignCleaner.ExecuteAsync(ids, cancellationToken), Options.Concurrency,
cancellationToken);
foreach (var campaignId in campaignIds)
{
_ = await targetBlock.SendAsync(campaignId, cancellationToken).ConfigureAwait(false);
}
targetBlock.Complete();
await targetBlock.Completion.AggregateExceptions <DataPurgingException>(
"Purging of Campaign data has been failed. See inner exception for more details.");
_logger.LogDebug(
$"Purging of {campaignIds.Length} campaign(s) has been completed successfully according to the '{nameof(Options.DaysAfter)}' parameter.");
}
}
