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visitor.go
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visitor.go
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package splitstore
import (
"sync"
"github.com/ipfs/go-cid"
)
// ObjectVisitor is an interface for deduplicating objects during walks
type ObjectVisitor interface {
Visit(cid.Cid) (bool, error)
}
type noopVisitor struct{}
var _ ObjectVisitor = (*noopVisitor)(nil)
func (v *noopVisitor) Visit(_ cid.Cid) (bool, error) {
return true, nil
}
type tmpVisitor struct {
set *cid.Set
}
var _ ObjectVisitor = (*tmpVisitor)(nil)
func (v *tmpVisitor) Visit(c cid.Cid) (bool, error) {
if isUnitaryObject(c) {
return false, nil
}
return v.set.Visit(c), nil
}
func newTmpVisitor() ObjectVisitor {
return &tmpVisitor{set: cid.NewSet()}
}
type concurrentVisitor struct {
mx sync.Mutex
set *cid.Set
}
var _ ObjectVisitor = (*concurrentVisitor)(nil)
func newConcurrentVisitor() *concurrentVisitor {
return &concurrentVisitor{set: cid.NewSet()}
}
func (v *concurrentVisitor) Visit(c cid.Cid) (bool, error) {
if isUnitaryObject(c) {
return false, nil
}
v.mx.Lock()
defer v.mx.Unlock()
return v.set.Visit(c), nil
}