forked from TrueCloudLab/frostfs-node
318639e5bf
`apistatus` package provides types which implement build-in `error` interface. Add `error of type` pattern when documenting these errors in order to clarify how these errors should be handled (e.g. `errors.Is` is not good). Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package blobovnicza
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import (
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apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
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addressSDK "github.com/nspcc-dev/neofs-sdk-go/object/address"
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"go.etcd.io/bbolt"
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"go.uber.org/zap"
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)
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// GetPrm groups the parameters of Get operation.
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type GetPrm struct {
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addr *addressSDK.Address
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}
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// GetRes groups resulting values of Get operation.
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type GetRes struct {
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obj []byte
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}
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// SetAddress sets address of the requested object.
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func (p *GetPrm) SetAddress(addr *addressSDK.Address) {
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p.addr = addr
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}
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// Object returns binary representation of the requested object.
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func (p *GetRes) Object() []byte {
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return p.obj
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}
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// Get reads the object from Blobovnicza by address.
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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.
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//
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// Returns an error of type apistatus.ObjectNotFound if requested object is not
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// presented in Blobovnicza.
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func (b *Blobovnicza) Get(prm *GetPrm) (*GetRes, error) {
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var (
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data []byte
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addrKey = addressKey(prm.addr)
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)
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if err := b.boltDB.View(func(tx *bbolt.Tx) error {
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return b.iterateBuckets(tx, func(lower, upper uint64, buck *bbolt.Bucket) (bool, error) {
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data = buck.Get(addrKey)
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stop := data != nil
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if stop {
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b.log.Debug("object is found in bucket",
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zap.String("binary size", stringifyByteSize(uint64(len(data)))),
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zap.String("range", stringifyBounds(lower, upper)),
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)
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}
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return stop, nil
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})
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}); err != nil {
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return nil, err
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}
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if data == nil {
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var errNotFound apistatus.ObjectNotFound
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return nil, errNotFound
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}
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return &GetRes{
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obj: data,
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}, nil
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}
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