func (ts *TripleStore) RemoveTriple(t *graph.Triple) {
_, err := ts.db.Get(ts.createKeyFor("s", "p", "o", t), ts.readopts)
if err != nil && err != leveldb.ErrNotFound {
glog.Errorf("Couldn't access DB to confirm deletion")
return
}
if err == leveldb.ErrNotFound {
// No such triple in the database, forget about it.
return
}
batch := &leveldb.Batch{}
batch.Delete(ts.createKeyFor("s", "p", "o", t))
batch.Delete(ts.createKeyFor("o", "s", "p", t))
batch.Delete(ts.createKeyFor("p", "o", "s", t))
ts.UpdateValueKeyBy(t.Get("s"), -1, batch)
ts.UpdateValueKeyBy(t.Get("p"), -1, batch)
ts.UpdateValueKeyBy(t.Get("o"), -1, batch)
if t.Get("c") != "" {
batch.Delete(ts.createProvKeyFor("p", "s", "o", t))
ts.UpdateValueKeyBy(t.Get("c"), -1, batch)
}
err = ts.db.Write(batch, nil)
if err != nil {
glog.Errorf("Couldn't delete triple %s", t.ToString())
return
}
ts.size--
}
func (ts *TripleStore) AddTriple(t *graph.Triple) {
batch := &leveldb.Batch{}
ts.buildWrite(batch, t)
err := ts.db.Write(batch, ts.writeopts)
if err != nil {
glog.Errorf("Couldn't write to DB for triple %s", t.ToString())
return
}
ts.size++
}
func (ts *TripleStore) buildTripleWrite(batch *leveldb.Batch, t *graph.Triple) {
bytes, err := json.Marshal(*t)
if err != nil {
glog.Errorf("Couldn't write to buffer for triple %s\n %s\n", t.ToString(), err)
return
}
batch.Put(ts.createKeyFor("s", "p", "o", t), bytes)
batch.Put(ts.createKeyFor("o", "s", "p", t), bytes)
batch.Put(ts.createKeyFor("p", "o", "s", t), bytes)
if t.Get("c") != "" {
batch.Put(ts.createProvKeyFor("p", "s", "o", t), bytes)
}
}