async Task IAsyncLogProviderCommandHandler.ContinueAsynchronously(CommandContext ctx)
{
result = new DateBoundPositionResponseData();
result.Position = await PositionedMessagesUtils.LocateDateBound(ctx.Reader, date, bound, ctx.Cancellation);
ctx.Tracer.Info("Position to return: {0}", result.Position);
if (result.Position == ctx.Reader.EndPosition)
{
result.IsEndPosition = true;
ctx.Tracer.Info("It is END position");
}
else if (result.Position == ctx.Reader.BeginPosition - 1)
{
result.IsBeforeBeginPosition = true;
ctx.Tracer.Info("It is BEGIN-1 position");
}
else
{
ctx.Cancellation.ThrowIfCancellationRequested();
if (messageRequested)
{
result.Message = await PositionedMessagesUtils.ReadNearestMessage(ctx.Reader, result.Position, MessagesParserFlag.HintMessageContentIsNotNeeed);
ctx.Tracer.Info("Details to return: {0} at {1}", result.Message?.Time, result.Message?.Position);
}
}
dateBoundsCache.Set(date, result);
}
public bool Update()
{
using (owner.trace.NewNamedFrame("Updating {0}", this.fileName))
{
CheckDisposed();
try
{
if (simpleMedia == null)
{
owner.trace.Info("SimpleMedia object not created yet. Creating");
simpleMedia = new SimpleFileMedia(
owner.fileSystem,
SimpleFileMedia.CreateConnectionParamsFromFileName(Path.Combine(owner.baseDirectory, FileName))
);
}
owner.trace.Info("Updating simple media");
simpleMedia.Update();
if (!simpleMedia.IsAvailable)
{
owner.trace.Info("File is not avaliable (i.e. has been deleted)");
return(false);
}
if (firstMessageTime == null)
{
owner.trace.Info("First message time is unknown. Calcalating it");
using (IPositionedMessagesReader reader = (IPositionedMessagesReader)Activator.CreateInstance(
owner.logReaderType, new MediaBasedReaderParams(owner.tempThreads, SimpleMedia, owner.tempFilesManager), owner.logFormatInfo))
{
owner.trace.Info("Reader created");
reader.UpdateAvailableBounds(false);
owner.trace.Info("Bounds found");
IMessage first = PositionedMessagesUtils.ReadNearestMessage(reader, reader.BeginPosition);
if (first == null)
{
owner.trace.Warning("No messages found");
return(false);
}
owner.trace.Info("First message: {0} '{1}'", first.Time, first.Text);
firstMessageTime = first.Time;
}
}
owner.trace.Info("Part updated OK");
return(true);
}
catch (Exception e)
{
owner.trace.Error(e, "Failure during part update");
return(false);
}
}
}