Exemplo n.º 1
0
        private long NewPosition(int resultingOffset)
        {
            if (resultingOffset > 0)
            {
                _termOffset = resultingOffset;

                return(_termBeginPosition + resultingOffset);
            }
            else
            {
                if ((_termBeginPosition + _termBufferLength) >= MaxPossiblePosition())
                {
                    return(MAX_POSITION_EXCEEDED);
                }

                int nextIndex  = LogBufferDescriptor.NextPartitionIndex(_activePartitionIndex);
                int nextTermId = _termId + 1;

                _activePartitionIndex = nextIndex;
                _termOffset           = 0;
                _termId            = nextTermId;
                _termBeginPosition =
                    LogBufferDescriptor.ComputeTermBeginPosition(nextTermId, _positionBitsToShift, InitialTermId);

                LogBufferDescriptor.InitialiseTailWithTermId(_logMetaDataBuffer, nextIndex, nextTermId);
                LogBufferDescriptor.ActivePartitionIndexOrdered(_logMetaDataBuffer, nextIndex);

                return(ADMIN_ACTION);
            }
        }
Exemplo n.º 2
0
        private long NewPosition(int index, int currentTail, long position, long result)
        {
            var newPosition = ADMIN_ACTION;
            var termOffset  = TermAppender.TermOffset(result);

            if (termOffset > 0)
            {
                newPosition = (position - currentTail) + termOffset;
            }
            else if (termOffset == TermAppender.TRIPPED)
            {
                var nextIndex = LogBufferDescriptor.NextPartitionIndex(index);

                _termAppenders[nextIndex].TailTermId(TermAppender.TermId(result) + 1);
                LogBufferDescriptor.ActivePartitionIndexOrdered(_logMetaDataBuffer, nextIndex);
            }

            return(newPosition);
        }
Exemplo n.º 3
0
        private long NewPosition(int index, int currentTail, long position, long result)
        {
            var newPosition = ADMIN_ACTION;
            var termOffset  = LogBufferDescriptor.TermOffset(result);

            if (termOffset > 0)
            {
                newPosition = (position - currentTail) + termOffset;
            }
            else if ((position + currentTail) > _maxPossiblePosition)
            {
                newPosition = MAX_POSITION_EXCEEDED;
            }
            else if (termOffset == TermAppender.TRIPPED)
            {
                var nextIndex = LogBufferDescriptor.NextPartitionIndex(index);

                LogBufferDescriptor.InitialiseTailWithTermId(_logMetaDataBuffer, nextIndex, LogBufferDescriptor.TermId(result) + 1);
                LogBufferDescriptor.ActivePartitionIndexOrdered(_logMetaDataBuffer, nextIndex);
            }

            return(newPosition);
        }
Exemplo n.º 4
0
        private long NewPosition(int resultingOffset)
        {
            if (resultingOffset > 0)
            {
                _termOffset = resultingOffset;

                return(_termBeginPosition + resultingOffset);
            }
            else
            {
                int nextIndex  = LogBufferDescriptor.NextPartitionIndex(_activePartitionIndex);
                int nextTermId = _termId + 1;

                _activePartitionIndex = nextIndex;
                _termOffset           = 0;
                _termId            = nextTermId;
                _termBeginPosition = LogBufferDescriptor.ComputeTermBeginPosition(nextTermId, _positionBitsToShift, InitialTermId);

                _termAppenders[nextIndex].TailTermId(nextTermId);
                LogBufferDescriptor.ActivePartitionIndexOrdered(_logMetaDataBuffer, nextIndex);

                return(ADMIN_ACTION);
            }
        }