func NewWriteQTree(bs *bstore.BlockStore, id uuid.UUID) (*QTree, error) {
gen := bs.ObtainGeneration(id)
rv := &QTree{
sb: gen.New_SB,
gen: gen,
bs: bs,
}
//If there is an existing root node, we need to load it so that it
//has the correct values
if rv.sb.Root() != 0 {
rt, err := rv.LoadNode(rv.sb.Root(), rv.sb.Gen(), ROOTPW, ROOTSTART)
if err != nil {
log.Panicf("%v", err)
return nil, err
}
rv.root = rt
} else {
rt, err := rv.NewCoreNode(ROOTSTART, ROOTPW)
if err != nil {
log.Panicf("%v", err)
return nil, err
}
rv.root = rt
}
return rv, nil
}
/**
* Load a quasar tree
*/
func NewReadQTree(bs *bstore.BlockStore, id uuid.UUID, generation uint64) (*QTree, error) {
sb := bs.LoadSuperblock(id, generation)
if sb == nil {
return nil, ErrNoSuchStream
}
rv := &QTree{sb: sb, bs: bs}
if sb.Root() != 0 {
rt, err := rv.LoadNode(sb.Root(), sb.Gen(), ROOTPW, ROOTSTART)
if err != nil {
log.Panicf("%v", err)
return nil, err
}
//log.Debug("The start time for the root is %v",rt.StartTime())
rv.root = rt
}
return rv, nil
}
