frostfs-sdk-go/object/erasurecode/target.go

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package erasurecode
import (
"context"
"crypto/ecdsa"
objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer"
)
// Target accepts regular objects and splits them into erasure-coded chunks.
type Target struct {
c *Constructor
key *ecdsa.PrivateKey
next transformer.ObjectWriter
}
// ObjectWriter is an interface of the object writer that writes prepared object.
type ObjectWriter interface {
WriteObject(context.Context, *objectSDK.Object) error
}
// NewTarget returns new target instance.
func NewTarget(c *Constructor, key *ecdsa.PrivateKey, next ObjectWriter) *Target {
return &Target{
c: c,
key: key,
next: next,
}
}
// WriteObject implements the transformer.ObjectWriter interface.
func (t *Target) WriteObject(ctx context.Context, obj *objectSDK.Object) error {
parts, err := t.c.Split(obj, t.key)
if err != nil {
return err
}
for i := range parts {
if err := t.next.WriteObject(ctx, parts[i]); err != nil {
return err
}
}
return nil
}