public IEnumerable <JournalRecord> GetRecords(long fromRecord = 0)
{
var endStreamCut = GetEndStreamCut();
_lastEventReadHandler.Invoke(endStreamCut);
var request = new ReadEventsRequest
{
Scope = _scope,
Stream = _stream,
ToStreamCut = endStreamCut
};
var recordNumber = 0;
using var call = _client.ReadEvents(request, cancellationToken: _cancellationToken);
var responseStream = call.ResponseStream;
while (responseStream.MoveNext(_cancellationToken).GetAwaiter().GetResult())
{
if (recordNumber <= fromRecord)
{
continue;
}
var @event = responseStream.Current;
var bytes = @event.Event.ToByteArray();
var savedRecord = (JournalRecord)_serializer.Deserialize(bytes);
var record = new JournalRecord(recordNumber++, savedRecord.Written, savedRecord.Command);
yield return(record);
}
}
private static async Task ReadAllEvents()
{
var request = new ReadEventsRequest();
request.Scope = ScopeName;
request.Stream = StreamName;
// read to the current end of the stream
// without this parameter the reader will block and
// wait for future events when the end is reached
request.ToStreamCut = await GetTailStreamCut();
using var call = _client.ReadEvents(request);
while (await call.ResponseStream.MoveNext())
{
var response = call.ResponseStream.Current;
Console.WriteLine("---- Event received ------");
Console.WriteLine(" Payload size: " + response.Event.Length);
Console.WriteLine(" Position.Description: " + response.Position.Description);
Console.WriteLine(" EventPointer.Description: " + response.EventPointer.Description);
Console.WriteLine(" StreamCut.Description: " + response.StreamCut.Description);
EventPointers.Add(response.EventPointer);
}
}
public IJournalSubscription Subscribe(long @from, Action <JournalRecord> handler)
{
var request = new ReadEventsRequest();
request.Scope = Config.Current.GetSettings <EngineSettings>().StreamName;
request.Stream = "mystream";
var response = _client.ReadEvents(request);
var streamReader = response.ResponseStream;
var sub = new PravegaJournalSubscription(handler, streamReader);
sub.Start();
return(sub);
}
