protected async override Task <List <GeneratedObserver> > HandleCore(ObserverGenerateCommand command)
{
List <Observer> dbObservers = new List <Observer>();
List <GeneratedObserver> generatedObservers = new List <GeneratedObserver>();
for (int i = 0; i < command.NrObservers; ++i)
{
RandomObserverBuilder builder = new RandomObserverBuilder();
dbObservers.Add(builder.build(command.IdNgo));
}
try
{
using (var tran = await _voteMonitorContext.Database.BeginTransactionAsync())
{
int latestId = _voteMonitorContext.Observers
.OrderByDescending(o => o.Id)
.FirstOrDefault()
.Id;
dbObservers = dbObservers
.Select(o => { o.Id = ++latestId; return(o); })
.ToList();
_voteMonitorContext.Observers.AddRange(dbObservers.ToArray());
var result = await _voteMonitorContext.SaveChangesAsync();
tran.Commit();
return(dbObservers
.Select(o => _mapper.Map <GeneratedObserver>(o))
.ToList());
}
}
catch (Exception ex)
{
_logger.LogError("Error during generation of random observers", ex, ex.Message);
}
return(await Task.FromResult(generatedObservers));
}
public async Task <List <GeneratedObserver> > Handle(ObserverGenerateCommand request, CancellationToken cancellationToken)
{
List <Entities.Observer> dbObservers = new List <Entities.Observer>();
List <GeneratedObserver> generatedObservers = new List <GeneratedObserver>();
for (int i = 0; i < request.NrObservers; ++i)
{
dbObservers.Add(RandomObserverBuilder.Instance(_hashService).Build(request.IdNgo));
}
try
{
using (var tran = await _voteMonitorContext.Database.BeginTransactionAsync(cancellationToken))
{
int latestId = _voteMonitorContext.Observers
.OrderByDescending(o => o.Id)
.First()
.Id;
dbObservers = dbObservers
.Select(o => { o.Id = ++latestId; return(o); })
.ToList();
_voteMonitorContext.Observers.AddRange(dbObservers.ToArray());
await _voteMonitorContext.SaveChangesAsync(cancellationToken);
tran.Commit();
return(dbObservers
.Select(o => _mapper.Map <GeneratedObserver>(o))
.ToList());
}
}
catch (Exception ex)
{
_logger.LogError("Error during generation of random observers", ex, ex.Message);
}
return(await Task.FromResult(generatedObservers));
}