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This commit is contained in:
kortschak 2014-06-28 13:29:16 +09:30
parent 913d567ae1
commit 40f3363cde
20 changed files with 188 additions and 189 deletions
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40
graph/leveldb/all_iterator.go
View file

@ -19,26 +19,26 @@ import (
"fmt"
"strings"
leveldb_it "github.com/syndtr/goleveldb/leveldb/iterator"
leveldb_opt "github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/iterator"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/google/cayley/graph"
)
type LevelDBAllIterator struct {
type AllIterator struct {
graph.BaseIterator
prefix []byte
dir string
open bool
it leveldb_it.Iterator
ts *LevelDBTripleStore
ro *leveldb_opt.ReadOptions
it iterator.Iterator
ts *TripleStore
ro *opt.ReadOptions
}
func NewLevelDBAllIterator(prefix, dir string, ts *LevelDBTripleStore) *LevelDBAllIterator {
var it LevelDBAllIterator
func NewLevelDBAllIterator(prefix, dir string, ts *TripleStore) *AllIterator {
var it AllIterator
graph.BaseIteratorInit(&it.BaseIterator)
it.ro = &leveldb_opt.ReadOptions{}
it.ro = &opt.ReadOptions{}
it.ro.DontFillCache = true
it.it = ts.db.NewIterator(nil, it.ro)
it.prefix = []byte(prefix)
@ -53,7 +53,7 @@ func NewLevelDBAllIterator(prefix, dir string, ts *LevelDBTripleStore) *LevelDBA
return &it
}
func (a *LevelDBAllIterator) Reset() {
func (a *AllIterator) Reset() {
if !a.open {
a.it = a.ts.db.NewIterator(nil, a.ro)
a.open = true
@ -65,13 +65,13 @@ func (a *LevelDBAllIterator) Reset() {
}
}
func (a *LevelDBAllIterator) Clone() graph.Iterator {
func (a *AllIterator) Clone() graph.Iterator {
out := NewLevelDBAllIterator(string(a.prefix), a.dir, a.ts)
out.CopyTagsFrom(a)
return out
}
func (a *LevelDBAllIterator) Next() (graph.TSVal, bool) {
func (a *AllIterator) Next() (graph.TSVal, bool) {
if !a.open {
a.Last = nil
return nil, false
@ -91,19 +91,19 @@ func (a *LevelDBAllIterator) Next() (graph.TSVal, bool) {
return out, true
}
func (a *LevelDBAllIterator) Check(v graph.TSVal) bool {
func (a *AllIterator) Check(v graph.TSVal) bool {
a.Last = v
return true
}
func (lit *LevelDBAllIterator) Close() {
func (lit *AllIterator) Close() {
if lit.open {
lit.it.Release()
lit.open = false
}
}
func (a *LevelDBAllIterator) Size() (int64, bool) {
func (a *AllIterator) Size() (int64, bool) {
size, err := a.ts.GetApproximateSizeForPrefix(a.prefix)
if err == nil {
return size, false
@ -112,19 +112,19 @@ func (a *LevelDBAllIterator) Size() (int64, bool) {
return int64(^uint64(0) >> 1), false
}
func (lit *LevelDBAllIterator) DebugString(indent int) string {
func (lit *AllIterator) DebugString(indent int) string {
size, _ := lit.Size()
return fmt.Sprintf("%s(%s tags: %v leveldb size:%d %s %p)", strings.Repeat(" ", indent), lit.Type(), lit.Tags(), size, lit.dir, lit)
}
func (lit *LevelDBAllIterator) Type() string { return "all" }
func (lit *LevelDBAllIterator) Sorted() bool { return false }
func (lit *AllIterator) Type() string { return "all" }
func (lit *AllIterator) Sorted() bool { return false }
func (lit *LevelDBAllIterator) Optimize() (graph.Iterator, bool) {
func (lit *AllIterator) Optimize() (graph.Iterator, bool) {
return lit, false
}
func (lit *LevelDBAllIterator) GetStats() *graph.IteratorStats {
func (lit *AllIterator) GetStats() *graph.IteratorStats {
s, _ := lit.Size()
return &graph.IteratorStats{
CheckCost: 1,