public DataPage(IBufferSegment buffer) : base(buffer)
{
if (Header.Type != PageType.Data)
{
throw new Exception("Invalid page type!");
}
}
public ReadResponse(Guid id, IBufferSegment bufferSegment, uint pageId)
{
BufferSegment = bufferSegment;
PageId = pageId;
Id = id;
}
public WriteRequest(IBufferSegment bufferSegment, uint pageId)
{
Id = Guid.NewGuid();
BufferSegment = bufferSegment;
PageId = pageId;
}
public override void Return(IBufferSegment segment)
{
segment.Dispose();
}
public DataPage(IBufferSegment buffer, uint id) : base(buffer, id, PageType.Data)
{
}
public abstract void Return(IBufferSegment segment);
public static HeaderPage CreateHeaderPage(IBufferSegment bufferSegment)
{
_instance =
new HeaderPage(bufferSegment, 0, PageType.Header);
return(Instance);
}
public static HeaderPage LoadHeaderPage(IBufferSegment bufferSegment)
{
_instance = new HeaderPage(bufferSegment);
return(Instance);
}
protected HeaderPage(IBufferSegment buffer, uint id, PageType pageType) : base(buffer, id, pageType)
{
_headerPageData = new HeaderPageData();
}
protected HeaderPage(IBufferSegment buffer) : base(buffer)
{
Guard.Argument(Header.PageId).Zero();
Guard.Argument(Header.Type).Equal(PageType.Header);
LoadData();
}
