public T TryReadAt <T>(long position, Func <byte[], T> readRecordFunc, bool autoCache = true) where T : class, ILogRecord
{
var lastChunk = _chunkWriter.CurrentChunk;
var maxPosition = lastChunk.GlobalDataPosition;
if (position >= maxPosition)
{
return(null);
}
var chunkNum = _chunkManager.GetChunkNum(position);
var chunk = _chunkManager.GetChunk(chunkNum);
if (chunk == null)
{
throw new ChunkNotExistException(position, chunkNum);
}
var localPosition = chunk.ChunkHeader.GetLocalDataPosition(position);
return(chunk.TryReadAt(localPosition, readRecordFunc, autoCache));
}
public T TryReadAt <T>(long position, Func <byte[], T> readRecordFunc, bool autoCache = true) where T : class, ILogRecord
{
var lastChunk = _chunkWriter.CurrentChunk;
var maxPosition = lastChunk.GlobalDataPosition;
if (position >= maxPosition)
{
throw new ChunkReadException(
string.Format("Cannot read record after the max global data position, data position: {0}, max global data position: {1}, chunk: {2}.",
position, maxPosition, lastChunk));
}
var chunkNum = _chunkManager.GetChunkNum(position);
var chunk = _chunkManager.GetChunk(chunkNum);
if (chunk == null)
{
throw new ChunkNotExistException(position, chunkNum);
}
var localPosition = chunk.ChunkHeader.GetLocalDataPosition(position);
return(chunk.TryReadAt(localPosition, readRecordFunc, autoCache));
}
