private async Task <long> HandleMessageJournalEntries(long count, MessageJournalReadResult result, IBus bus, CancellationToken cancellationToken)
{
var entries = result.Entries;
using (var entryEnumerator = entries.GetEnumerator())
{
if (!entryEnumerator.MoveNext())
{
return(count);
}
// Handle messages [0, ..., n-2]
var current = entryEnumerator.Current;
count++;
while (entryEnumerator.MoveNext())
{
var next = entryEnumerator.Current;
if (next != null)
{
await HandleMessageJournalEntry(bus, cancellationToken, current, next.Position, count);
}
current = next;
count++;
}
// Handle message [n-1]
await HandleMessageJournalEntry(bus, cancellationToken, current, result.Next, count);
count++;
}
return(count);
}
private async Task <MessageJournalReadResult> ReadNext(CancellationToken cancellationToken, MessageJournalPosition current)
{
MessageJournalReadResult readResult = null;
try
{
readResult = await _messageJournal.Read(current, _batchSize, _filter, cancellationToken);
}
catch (OperationCanceledException)
{
throw;
}
catch (Exception ex)
{
_diagnosticService.Emit(new DiagnosticEventBuilder(this, DiagnosticEventType.UnhandledException)
{
Detail = "Error reading message journal",
Exception = ex
}.Build());
if (_rethrowExceptions)
{
throw;
}
}
return(readResult);
}
