private void OpenExistingTable()
{
// Attempt to read table data.
_tableHeaderStorage.Open();
_logsStorage.Open();
_logsDataStorage.Open();
_categoriesStorage.Open();
_tableHeaderStorage.ReadStructure(ref _tableHeaderStructure);
// Load categories.
var oneCategoryEntry = default(RaxCategoryEntry);
for (int i = 0; i < _tableHeaderStructure.CategoriesCount; i++)
{
var category = new CategoryInformation();
_categoriesStorage.SetPositionOffset(i * _catSize);
_categoriesStorage.ReadStructure(ref oneCategoryEntry);
category.CategoryIndex = i;
category.CategoryName = new string(oneCategoryEntry.CategoryName, 0, oneCategoryEntry.CategoryRealNameLengthInBytes / 2);
category.LogsCount = oneCategoryEntry.Header.LogsCountInCategory;
category.MinTimestamp = oneCategoryEntry.Header.MinTimestamp;
category.MaxTimestamp = oneCategoryEntry.Header.MaxTimestamp;
_categoriesByIndex[category.CategoryIndex] = category;
_categoriesByName[category.CategoryName] = category;
}
// Load indexes
for (int year = new DateTime(_tableHeaderStructure.MinTimestamp).Year;
year <= new DateTime(_tableHeaderStructure.MaxTimestamp).Year;
++year)
{
GetOrCreateYearIndexStorage(year);
}
}
public override void Open()
{
_indexAndHeaderStorage.Open();
_appendOnlyDataStorage.Open();
_compressedStorage.Open();
_indexAndHeaderStorage.SetPositionOffset(0);
_indexAndHeaderStorage.ReadStructure(ref _header);
Initialize();
if (_header.CompressedBlocksCount > 0)
{
var offsetsBufferBytesCount = _header.CompressedBlocksCount * 8;
var offsetsBuffer = new byte[offsetsBufferBytesCount];
_indexAndHeaderStorage.ReadStructureArray(offsetsBuffer);
var offsets = MemoryMarshal.Cast <byte, long>(offsetsBuffer);
for (int i = 0; i < _header.CompressedBlocksCount; i++)
{
_blockOffsets.Add(offsets[i]);
}
}
}