private static HistogramBase CompressedEncodeDecode(HistogramBase source)
{
var targetBuffer = ByteBuffer.Allocate(source.GetNeededByteBufferCapacity());
source.EncodeIntoCompressedByteBuffer(targetBuffer);
targetBuffer.Position = 0;
return(HistogramEncoding.DecodeFromCompressedByteBuffer(targetBuffer, 0));
}
private void WriteHistogram(HistogramBase histogram)
{
var targetBuffer = ByteBuffer.Allocate(histogram.GetNeededByteBufferCapacity());
var compressedLength = histogram.EncodeIntoCompressedByteBuffer(targetBuffer);
byte[] compressedArray = new byte[compressedLength];
targetBuffer.BlockGet(compressedArray, 0, 0, compressedLength);
var startTimeStampSec = histogram.StartTimeStamp / 1000.0;
var endTimeStampSec = histogram.EndTimeStamp / 1000.0;
var intervalLength = endTimeStampSec - startTimeStampSec;
var maxValueUnitRatio = 1000000.0;
var intervalMax = histogram.GetMaxValue() / maxValueUnitRatio;
var binary = Convert.ToBase64String(compressedArray);
var payload = $"{startTimeStampSec:F3},{intervalLength:F3},{intervalMax:F3},{binary}";
_log.WriteLine(payload);
_log.Flush();
}
/// <summary>
/// Encode this histogram in compressed form into a <see cref="ByteBuffer"/>.
/// </summary>
/// <param name="source">The histogram to encode</param>
/// <param name="targetBuffer">The buffer to write to</param>
/// <returns>The number of bytes written to the buffer</returns>
public static int EncodeIntoCompressedByteBuffer(this HistogramBase source, ByteBuffer targetBuffer)
{
int neededCapacity = source.GetNeededByteBufferCapacity();
var intermediateUncompressedByteBuffer = ByteBuffer.Allocate(neededCapacity);
source.Encode(intermediateUncompressedByteBuffer, HistogramEncoderV2.Instance);
int initialTargetPosition = targetBuffer.Position;
targetBuffer.PutInt(GetCompressedEncodingCookie());
int compressedContentsHeaderPosition = targetBuffer.Position;
targetBuffer.PutInt(0); // Placeholder for compressed contents length
var compressedDataLength = targetBuffer.CompressedCopy(intermediateUncompressedByteBuffer, targetBuffer.Position);
targetBuffer.PutInt(compressedContentsHeaderPosition, compressedDataLength); // Record the compressed length
int bytesWritten = compressedDataLength + 8;
targetBuffer.Position = (initialTargetPosition + bytesWritten);
return(bytesWritten);
}
private void WriteHistogram(HistogramBase histogram)
{
var targetBuffer = ByteBuffer.Allocate(histogram.GetNeededByteBufferCapacity());
var compressedLength = histogram.EncodeIntoCompressedByteBuffer(targetBuffer);
byte[] compressedArray = new byte[compressedLength];
targetBuffer.BlockGet(compressedArray, 0, 0, compressedLength);
var startTimeStampSec = histogram.StartTimeStamp / 1000.0;
var endTimeStampSec = histogram.EndTimeStamp / 1000.0;
var intervalLength = endTimeStampSec - startTimeStampSec;
var maxValueUnitRatio = 1000000.0;
var intervalMax = histogram.GetMaxValue() / maxValueUnitRatio;
var binary = Convert.ToBase64String(compressedArray);
var payload = $"{startTimeStampSec:F3},{intervalLength:F3},{intervalMax:F3},{binary}";
_log.WriteLine(payload);
_log.Flush();
}
