public static void FillMetaData(UnsafeBuffer cncMetaDataBuffer, int toDriverBufferLength, int toClientsBufferLength, int counterMetaDataBufferLength, int counterValuesBufferLength, long clientLivenessTimeout, int errorLogBufferLength)
{
cncMetaDataBuffer.PutInt(CncVersionOffset(0), CNC_VERSION);
cncMetaDataBuffer.PutInt(ToDriverBufferLengthOffset(0), toDriverBufferLength);
cncMetaDataBuffer.PutInt(ToClientsBufferLengthOffset(0), toClientsBufferLength);
cncMetaDataBuffer.PutInt(CountersMetaDataBufferLengthOffset(0), counterMetaDataBufferLength);
cncMetaDataBuffer.PutInt(CountersValuesBufferLengthOffset(0), counterValuesBufferLength);
cncMetaDataBuffer.PutLong(ClientLivenessTimeoutOffset(0), clientLivenessTimeout);
cncMetaDataBuffer.PutInt(ErrorLogBufferLengthOffset(0), errorLogBufferLength);
}
/// <summary>
/// Return an initialised default Data Frame Header.
/// </summary>
/// <param name="sessionId"> for the header </param>
/// <param name="streamId"> for the header </param>
/// <param name="termId"> for the header </param>
/// <returns> byte array containing the header </returns>
public static UnsafeBuffer CreateDefaultHeader(int sessionId, int streamId, int termId)
{
var buffer = new UnsafeBuffer(new byte[HEADER_LENGTH]);
buffer.PutByte(VERSION_FIELD_OFFSET, CURRENT_VERSION);
buffer.PutByte(FLAGS_FIELD_OFFSET, (byte)BEGIN_AND_END_FLAGS);
buffer.PutShort(TYPE_FIELD_OFFSET, HDR_TYPE_DATA);
buffer.PutInt(SESSION_ID_FIELD_OFFSET, sessionId);
buffer.PutInt(STREAM_ID_FIELD_OFFSET, streamId);
buffer.PutInt(TERM_ID_FIELD_OFFSET, termId);
buffer.PutLong(RESERVED_VALUE_OFFSET, DEFAULT_RESERVE_VALUE);
return buffer;
}
/// <summary>
/// Store the default frame header to the log meta data buffer.
/// </summary>
/// <param name="logMetaDataBuffer"> into which the default headers should be stored. </param>
/// <param name="defaultHeader"> to be stored. </param>
/// <exception cref="ArgumentException"> if the default header is larger than <seealso cref="LOG_DEFAULT_FRAME_HEADER_MAX_LENGTH"/> </exception>
public static void StoreDefaultFrameHeader(UnsafeBuffer logMetaDataBuffer, IDirectBuffer defaultHeader)
{
if (defaultHeader.Capacity != DataHeaderFlyweight.HEADER_LENGTH)
{
throw new ArgumentException(
$"Default header of {defaultHeader.Capacity:D} not equal to {DataHeaderFlyweight.HEADER_LENGTH:D}");
}
logMetaDataBuffer.PutInt(LOG_DEFAULT_FRAME_HEADER_LENGTH_OFFSET, DataHeaderFlyweight.HEADER_LENGTH);
logMetaDataBuffer.PutBytes(LOG_DEFAULT_FRAME_HEADER_OFFSET, defaultHeader, 0, DataHeaderFlyweight.HEADER_LENGTH);
}
/// <summary>
/// Set the MTU length used for this log.
/// </summary>
/// <param name="logMetaDataBuffer"> containing the meta data. </param>
/// <param name="mtuLength"> value to be set. </param>
public static void MtuLength(UnsafeBuffer logMetaDataBuffer, int mtuLength)
{
logMetaDataBuffer.PutInt(LOG_MTU_LENGTH_OFFSET, mtuLength);
}
/// <summary>
/// Set the initial term at which this log begins. Initial should be randomised so that stream does not get
/// reused accidentally.
/// </summary>
/// <param name="logMetaDataBuffer"> containing the meta data. </param>
/// <param name="initialTermId"> value to be set. </param>
public static void InitialTermId(UnsafeBuffer logMetaDataBuffer, int initialTermId)
{
logMetaDataBuffer.PutInt(LOG_INITIAL_TERM_ID_OFFSET, initialTermId);
}
/// <summary>
/// Write the term id field for a frame.
/// </summary>
/// <param name="buffer"> containing the frame. </param>
/// <param name="termOffset"> at which a frame begins. </param>
/// <param name="termId"> value for the frame. </param>
public static void FrameTermId(UnsafeBuffer buffer, int termOffset, int termId)
{
buffer.PutInt(TermIdOffset(termOffset), termId);
}
