frostfs-node/pkg/services/object/common.go

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package object
import (
"context"
objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
)
// NodeState is storage node state processed by Object service.
type NodeState interface {
// IsMaintenance checks if node is under maintenance. Node MUST NOT serve
// local object operations. Node MUST respond with apistatus.NodeUnderMaintenance
// error if IsMaintenance returns true.
IsMaintenance() bool
}
// Common is an Object API ServiceServer which encapsulates logic spread to all
// object operations.
//
// If underlying NodeState.IsMaintenance returns true, all operations are
// immediately failed with apistatus.NodeUnderMaintenance.
type Common struct {
state NodeState
nextHandler ServiceServer
}
// Init initializes the Common instance.
func (x *Common) Init(state NodeState, nextHandler ServiceServer) {
x.state = state
x.nextHandler = nextHandler
}
var errMaintenance apistatus.NodeUnderMaintenance
func (x *Common) Get(req *objectV2.GetRequest, stream GetObjectStream) error {
if x.state.IsMaintenance() {
return errMaintenance
}
return x.nextHandler.Get(req, stream)
}
func (x *Common) Put() (PutObjectStream, error) {
if x.state.IsMaintenance() {
return nil, errMaintenance
}
return x.nextHandler.Put()
}
func (x *Common) Head(ctx context.Context, req *objectV2.HeadRequest) (*objectV2.HeadResponse, error) {
if x.state.IsMaintenance() {
return nil, errMaintenance
}
return x.nextHandler.Head(ctx, req)
}
func (x *Common) Search(req *objectV2.SearchRequest, stream SearchStream) error {
if x.state.IsMaintenance() {
return errMaintenance
}
return x.nextHandler.Search(req, stream)
}
func (x *Common) Delete(ctx context.Context, req *objectV2.DeleteRequest) (*objectV2.DeleteResponse, error) {
if x.state.IsMaintenance() {
return nil, errMaintenance
}
return x.nextHandler.Delete(ctx, req)
}
func (x *Common) GetRange(req *objectV2.GetRangeRequest, stream GetObjectRangeStream) error {
if x.state.IsMaintenance() {
return errMaintenance
}
return x.nextHandler.GetRange(req, stream)
}
func (x *Common) GetRangeHash(ctx context.Context, req *objectV2.GetRangeHashRequest) (*objectV2.GetRangeHashResponse, error) {
if x.state.IsMaintenance() {
return nil, errMaintenance
}
return x.nextHandler.GetRangeHash(ctx, req)
}