[#222] Add Head method in shard

Signed-off-by: Alex Vanin <alexey@nspcc.ru>
This commit is contained in:
Alex Vanin 2020-12-01 11:34:38 +03:00
parent 244e244c0e
commit 97a2e26b71

View file

@ -0,0 +1,43 @@
package shard
import (
objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
"github.com/nspcc-dev/neofs-node/pkg/core/object"
)
// HeadPrm groups the parameters of Head operation.
type HeadPrm struct {
addr *objectSDK.Address
}
// HeadRes groups resulting values of Head operation.
type HeadRes struct {
obj *object.Object
}
// WithAddress is a Head option to set the address of the requested object.
//
// Option is required.
func (p *HeadPrm) WithAddress(addr *objectSDK.Address) *HeadPrm {
if p != nil {
p.addr = addr
}
return p
}
// Object returns the requested object header.
func (r *HeadRes) Object() *object.Object {
return r.obj
}
// Head reads header of the object from the shard.
//
// Returns any error encountered.
func (s *Shard) Head(prm *HeadPrm) (*HeadRes, error) {
head, err := s.metaBase.Get(prm.addr)
return &HeadRes{
obj: head,
}, err
}