frostfs-node/pkg/services/object/get/service.go

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package getsvc
import (
"github.com/TrueCloudLab/frostfs-node/pkg/core/client"
"github.com/TrueCloudLab/frostfs-node/pkg/core/netmap"
"github.com/TrueCloudLab/frostfs-node/pkg/local_object_storage/engine"
"github.com/TrueCloudLab/frostfs-node/pkg/services/object/util"
"github.com/TrueCloudLab/frostfs-node/pkg/services/object_manager/placement"
"github.com/TrueCloudLab/frostfs-node/pkg/util/logger"
cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
"github.com/TrueCloudLab/frostfs-sdk-go/object"
oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
"go.uber.org/zap"
)
// Service utility serving requests of Object.Get service.
type Service struct {
cfg
}
// Option is a Service's constructor option.
type Option func(*cfg)
type getClient interface {
getObject(*execCtx, client.NodeInfo) (*object.Object, error)
}
type cfg struct {
assembly bool
log *logger.Logger
localStorage interface {
get(*execCtx) (*object.Object, error)
}
clientCache interface {
get(client.NodeInfo) (getClient, error)
}
traverserGenerator interface {
GenerateTraverser(cid.ID, *oid.ID, uint64) (*placement.Traverser, error)
}
epochSource epochSource
keyStore *util.KeyStorage
}
type epochSource interface {
Epoch() (uint64, error)
}
func (c *cfg) initDefault() {
c.log = &logger.Logger{Logger: zap.L()}
c.localStorage = new(storageEngineWrapper)
c.assembly = true
c.clientCache = new(clientCacheWrapper)
}
// New creates, initializes and returns utility serving
// Object.Get service requests.
func New(opts ...Option) *Service {
var s Service
s.cfg.initDefault()
for i := range opts {
opts[i](&s.cfg)
}
return &s
}
// WithLogger returns option to specify Get service's logger.
func WithLogger(l *logger.Logger) Option {
return func(c *cfg) {
c.log = &logger.Logger{Logger: l.With(zap.String("component", "Object.Get service"))}
}
}
// WithoutAssembly returns option to disable object assembling.
func WithoutAssembly() Option {
return func(c *cfg) {
c.assembly = false
}
}
// WithLocalStorageEngine returns option to set local storage
// instance.
func WithLocalStorageEngine(e *engine.StorageEngine) Option {
return func(c *cfg) {
c.localStorage.(*storageEngineWrapper).engine = e
}
}
type ClientConstructor interface {
Get(client.NodeInfo) (client.MultiAddressClient, error)
}
// WithClientConstructor returns option to set constructor of remote node clients.
func WithClientConstructor(v ClientConstructor) Option {
return func(c *cfg) {
c.clientCache.(*clientCacheWrapper).cache = v
}
}
// WithTraverserGenerator returns option to set generator of
// placement traverser to get the objects from containers.
func WithTraverserGenerator(t *util.TraverserGenerator) Option {
return func(c *cfg) {
c.traverserGenerator = t
}
}
// WithNetMapSource returns option to set network
// map storage to receive current network state.
func WithNetMapSource(nmSrc netmap.Source) Option {
return func(c *cfg) {
c.epochSource = nmSrc
}
}
// WithKeyStorage returns option to set private
// key storage for session tokens and node key.
func WithKeyStorage(store *util.KeyStorage) Option {
return func(c *cfg) {
c.keyStore = store
}
}