private Task <Transaction[]> LoadNextPageAsync()
{
return(Task.Run(() =>
{
var transactions = new List <Transaction>();
Transaction transaction = null;
string json;
do
{
json = CurrentReader.ReadLine();
if (json != null)
{
object @event = JsonConvert.DeserializeObject(json, new JsonSerializerSettings
{
TypeNameHandling = TypeNameHandling.All,
TypeNameAssemblyFormat = FormatterAssemblyStyle.Full
});
string streamId = ExtractStreamIdFrom(@event);
if (transaction != null && transaction.StreamId != streamId)
{
transaction = null;
}
if (transaction == null)
{
transaction = new Transaction
{
Id = Guid.NewGuid().ToString(),
TimeStampUtc = DateTime.UtcNow,
StreamId = streamId,
Checkpoint = lastCheckpoint++
};
transactions.Add(transaction);
}
transaction.Events.Add(new EventEnvelope
{
Body = @event
});
}
}while ((json != null) && (transactions.Count < pageSize));
Console.WriteLine(
$"Loaded page of {transactions.Count} transactions " +
$"(checkpoint {transactions.First().Checkpoint}-{transactions.Last().Checkpoint}) " +
$"with {transactions.Sum(t => t.Events.Count)} events");
return transactions.ToArray();
}));
}
private Task <Transaction[]> LoadNextPageAsync()
{
return(Task.Run(() =>
{
var transactions = new List <Transaction>();
var transaction = new Transaction
{
Checkpoint = ++lastCheckpoint
};
string json;
do
{
json = CurrentReader.ReadLine();
if (json != null)
{
try
{
transaction.Events.Add(new EventEnvelope
{
Body = JsonConvert.DeserializeObject(json, new JsonSerializerSettings
{
TypeNameHandling = TypeNameHandling.All,
TypeNameAssemblyFormatHandling = TypeNameAssemblyFormatHandling.Full
})
});
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
if ((transaction.Events.Count == AverageEventsPerTransaction) || (json == null))
{
if (transaction.Events.Count > 0)
{
transactions.Add(transaction);
}
transaction = new Transaction
{
Checkpoint = ++lastCheckpoint
};
}
}while ((json != null) && (transactions.Count < pageSize));
return transactions.ToArray();
}));
}
