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store_vectors.go
58 lines (49 loc) · 1.44 KB
/
store_vectors.go
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package vecmt
import (
"github.com/corex-mn/corex-base/hash"
"github.com/corex-mn/corex-base/kvdb"
)
func (vi *Index) getBytes(table kvdb.Store, id hash.Event) []byte {
key := id.Bytes()
b, err := table.Get(key)
if err != nil {
vi.crit(err)
}
return b
}
func (vi *Index) setBytes(table kvdb.Store, id hash.Event, b []byte) {
key := id.Bytes()
err := table.Put(key, b)
if err != nil {
vi.crit(err)
}
}
// GetHighestBeforeTime reads the vector from DB
func (vi *Index) GetHighestBeforeTime(id hash.Event) *HighestBeforeTime {
if bVal, okGet := vi.cache.HighestBeforeTime.Get(id); okGet {
return bVal.(*HighestBeforeTime)
}
b := HighestBeforeTime(vi.getBytes(vi.table.HighestBeforeTime, id))
if b == nil {
return nil
}
vi.cache.HighestBeforeTime.Add(id, &b, uint(len(b)))
return &b
}
// GetHighestBefore reads the vector from DB
func (vi *Index) GetHighestBefore(id hash.Event) *HighestBefore {
return &HighestBefore{
VSeq: vi.Base.GetHighestBefore(id),
VTime: vi.GetHighestBeforeTime(id),
}
}
// SetHighestBeforeTime stores the vector into DB
func (vi *Index) SetHighestBeforeTime(id hash.Event, vec *HighestBeforeTime) {
vi.setBytes(vi.table.HighestBeforeTime, id, *vec)
vi.cache.HighestBeforeTime.Add(id, vec, uint(len(*vec)))
}
// SetHighestBefore stores the vectors into DB
func (vi *Index) SetHighestBefore(id hash.Event, vec *HighestBefore) {
vi.Base.SetHighestBefore(id, vec.VSeq)
vi.SetHighestBeforeTime(id, vec.VTime)
}