public void Execute(uint stage, SharpMedia.Database.Physical.Journalling.IService service)
{
Debug.Assert(stage == 0);
// 1) We first write to allocated block stream.
BlockStream stream = service.AllocationContext.CreateBlockStream((ulong)objectData.LongLength);
stream.Write(objectData);
// 2) We may need to delete object at index.
ObjectInfo data = tree.Find(service, index);
if (data != null)
{
// Deallocate link.
BlockStream stream2 = BlockStream.FromBase(data.Address, service);
stream2.Deallocate();
// We replace the entry (cheaper than delete and rewrite).
tree.Replace(service, new ObjectInfo(index, (ulong)objectData.LongLength, stream.BaseAddress));
}
else
{
// 3) We execute insert operation.
tree.Add(service, new ObjectInfo(index, (ulong)objectData.LongLength, stream.BaseAddress));
}
}
public unsafe void Execute(uint stage, SharpMedia.Database.Physical.Journalling.IService service)
{
Debug.Assert(stage == 0);
// 1) We first write object to stream.
BlockStream stream = service.AllocationContext.CreateBlockStream((ulong)objectData.LongLength);
stream.Write(objectData);
// 2) We may need to delete object from B+ stream.
Block block = service.Read(BlockType.TypedStreamHeader, typedStreamHeader);
fixed(byte *p = block.Data)
{
TypedStreamHeader *header = (TypedStreamHeader *)p;
// We may need to delete link.
if (header->ObjectsAddress != 0)
{
BlockStream objToDelete = BlockStream.FromBase(header->ObjectsAddress, service);
objToDelete.Deallocate();
}
// 3) We must relink it to out block.
header->ObjectsAddress = stream.BaseAddress;
header->ObjectSize = (ulong)objectData.LongLength;
}
service.Write(BlockType.TypedStreamHeader, typedStreamHeader, block);
}
public void Execute(uint stage, SharpMedia.Database.Physical.Journalling.IService service)
{
// 1) We read previous object placement and change it.
ObjectInfo info = childrenTree.Find(service, (uint)prevName.GetHashCode());
BlockStream stream = BlockStream.FromBase(info.Address, service);
ChildTag childTag = Common.DeserializeFromArray(stream.Read(info.Size)) as ChildTag;
childTag.Remove(prevName);
// Remove it if empty.
if (childTag.IsEmpty)
{
childrenTree.Remove(service, (uint)prevName.GetHashCode(), 1, false);
}
else
{
// Update the entry (now without this child).
byte[] childTagData = Common.SerializeToArray(childTag);
stream = service.AllocationContext.CreateBlockStream((ulong)childTagData.LongLength);
stream.Write(childTagData);
childrenTree.Replace(service,
new ObjectInfo((uint)prevName.GetHashCode(), (ulong)childTagData.LongLength, stream.BaseAddress));
}
// 3) We create new and insert it into tree.
ObjectInfo info2 = childrenTree.Find(service, (uint)newName.GetHashCode());
if (info2 == null)
{
// We create new tag.
childTag = new ChildTag();
childTag.Add(newName, info.Address);
byte[] childTagData = Common.SerializeToArray(childTag);
stream = service.AllocationContext.CreateBlockStream((ulong)childTagData.LongLength);
stream.Write(childTagData);
// And we add child.
childrenTree.Add(service,
new ObjectInfo((uint)newName.GetHashCode(), (ulong)childTagData.LongLength, stream.BaseAddress));
}
else
{
// We append it and release previous tag.
stream = BlockStream.FromBase(info2.Address, service);
childTag = Common.DeserializeFromArray(stream.Read(info2.Size)) as ChildTag;
stream.Deallocate();
// We modify and rewrite it.
childTag.Add(newName, info.Address);
byte[] childTagData = Common.SerializeToArray(childTag);
stream = service.AllocationContext.CreateBlockStream((ulong)childTagData.LongLength);
stream.Write(childTagData);
// We insert into children tree.
childrenTree.Replace(service,
new ObjectInfo((uint)newName.GetHashCode(), (ulong)childTagData.LongLength, info.Address));
}
}
public void Execute(uint stage, SharpMedia.Database.Physical.Journalling.IService service)
{
Debug.Assert(stage == 0);
foreach (AddObject op in subOperations)
{
op.Execute(stage, service);
}
}
public void Execute(uint stage, SharpMedia.Database.Physical.Journalling.IService service)
{
// 1) We create the object.
BlockStream stream = service.AllocationContext.CreateBlockStream((ulong)objectData.LongLength);
stream.Write(objectData);
// 2) We insert to B+ tree.
tree.Insert(service, before, new ObjectInfo(index, (ulong)objectData.LongLength, stream.BaseAddress));
}
public unsafe void Execute(uint stage, SharpMedia.Database.Physical.Journalling.IService service)
{
// 1) We first delete header node entry.
Block versionNodeBlock = service.Read(BlockType.NodeHeaderBlock, nodeVersionAddress);
ulong tsHeaderAddress = NodeVersionHelper.RemoveTypedStream(tsToDeleteIndex, versionNodeBlock);
// 2) We delete all objects.
Block tsHeader = service.Read(BlockType.TypedStreamHeader, tsHeaderAddress);
fixed(byte *p = tsHeader.Data)
{
TypedStreamHeader *header = (TypedStreamHeader *)p;
if ((header->Options & StreamOptions.SingleObject) != 0)
{
BlockStream stream = BlockStream.FromBase(header->ObjectsAddress, service);
stream.Deallocate();
}
else
{
// We have to delete whole link.
BPlusTree tree = new BPlusTree(header->ObjectsAddress);
List <ObjectInfo> all = tree.ListAll(service);
foreach (ObjectInfo info in all)
{
BlockStream stream = BlockStream.FromBase(info.Address, service);
stream.Deallocate();
}
// Make sure we get rid of tree.
tree.DeallocateTree(service);
}
}
// 3) We delete typed stream.
service.DeAllocate(tsHeaderAddress);
}
public void Execute(uint stage, SharpMedia.Database.Physical.Journalling.IService service)
{
subOperationsToExecute[(int)stage].ExecuteInternal(service);
}
