private async Task ReadWatermarkAsync()
{
if (currentWatermark != null)
{
return;
}
currentWatermark = await watermarkProvider.ReadAsync();
if (currentWatermark.ProviderWatermarks == null)
{
currentWatermark.ProviderWatermarks = new List <ProviderWatermark>();
}
while (currentWatermark.ProviderWatermarks.Count < sourceProviderHosts.Count)
{
currentWatermark.ProviderWatermarks.Add(new ProviderWatermark());
}
}
private async Task WriteWatermarkAsync(Watermark watermark)
{
await watermarkProvider.WriteAsync(watermark);
}
private async Task UpdateProviderAsync(SourceProviderHost sourceProviderHost, int providerId, Watermark nextWatermark)
{
await sourceProviderHost.UpdateAsync(nextWatermark.ProviderWatermarks[providerId]);
}
public Task WriteAsync(Watermark watermark)
{
return(Task.CompletedTask);
}