136 lines
3 KiB
Go
136 lines
3 KiB
Go
package engine
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import (
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objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
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"github.com/nspcc-dev/neofs-node/pkg/core/object"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
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"github.com/pkg/errors"
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"go.uber.org/zap"
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)
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// HeadPrm groups the parameters of Head operation.
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type HeadPrm struct {
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addr *objectSDK.Address
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raw bool
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}
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// HeadRes groups resulting values of Head operation.
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type HeadRes struct {
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head *object.Object
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}
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// WithAddress is a Head option to set the address of the requested object.
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//
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// Option is required.
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func (p *HeadPrm) WithAddress(addr *objectSDK.Address) *HeadPrm {
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if p != nil {
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p.addr = addr
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}
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return p
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}
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// WithRaw is a Head option to set raw flag value. If flag is unset, then Head
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// returns header of virtual object, otherwise it returns SplitInfo of virtual
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// object.
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func (p *HeadPrm) WithRaw(raw bool) *HeadPrm {
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if p != nil {
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p.raw = raw
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}
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return p
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}
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// Header returns the requested object header.
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//
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// Instance has empty payload.
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func (r *HeadRes) Header() *object.Object {
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return r.head
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}
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// Head reads object header from local storage.
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//
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// Returns any error encountered that
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// did not allow to completely read the object header.
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//
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// Returns object.ErrNotFound if requested object is missing in local storage.
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// Returns object.ErrAlreadyRemoved if requested object was inhumed.
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func (e *StorageEngine) Head(prm *HeadPrm) (*HeadRes, error) {
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if e.metrics != nil {
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defer elapsed(e.metrics.AddHeadDuration)()
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}
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var (
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head *object.Object
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siErr *objectSDK.SplitInfoError
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outError = object.ErrNotFound
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)
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shPrm := new(shard.HeadPrm).
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WithAddress(prm.addr).
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WithRaw(prm.raw)
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e.iterateOverSortedShards(prm.addr, func(_ int, sh *shard.Shard) (stop bool) {
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res, err := sh.Head(shPrm)
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if err != nil {
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switch {
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case errors.Is(err, object.ErrNotFound):
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return false // ignore, go to next shard
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case
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errors.Is(err, object.ErrAlreadyRemoved),
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errors.As(err, &siErr):
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outError = err
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return true // stop, return it back
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default:
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// TODO: smth wrong with shard, need to be processed, but
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// still go to next shard
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e.log.Warn("could not head object from shard",
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zap.Stringer("shard", sh.ID()),
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zap.String("error", err.Error()),
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)
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return false
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}
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}
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head = res.Object()
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return true
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})
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if head == nil {
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return nil, outError
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}
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return &HeadRes{
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head: head,
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}, nil
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}
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// Head reads object header from local storage by provided address.
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func Head(storage *StorageEngine, addr *objectSDK.Address) (*object.Object, error) {
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res, err := storage.Head(new(HeadPrm).
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WithAddress(addr),
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)
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if err != nil {
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return nil, err
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}
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return res.Header(), nil
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}
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// HeadRaw reads object header from local storage by provided address and raw
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// flag.
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func HeadRaw(storage *StorageEngine, addr *objectSDK.Address, raw bool) (*object.Object, error) {
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res, err := storage.Head(new(HeadPrm).
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WithAddress(addr).
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WithRaw(raw),
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)
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if err != nil {
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return nil, err
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}
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return res.Header(), nil
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}
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