90 changed files with 2050 additions and 1088 deletions
--- a/broker/broker.go
+++ b/broker/broker.go
@ -1,5 +1,5 @@
 // Package broker is an interface used for asynchronous messaging
-package broker
+package broker // import "go.unistack.org/micro/v3/broker"

 import (
 	"context"
@ -88,8 +88,6 @@ type BatchHandler func(Events) error

 // Event is given to a subscription handler for processing
 type Event interface {
-	// Context return context.Context for event
-	Context() context.Context
 	// Topic returns event topic
 	Topic() string
 	// Message returns broker message
--- a/broker/memory/memory.go
+++ b/broker/memory/memory.go
@ -206,7 +206,7 @@ func (m *memoryBroker) publish(ctx context.Context, msgs []*broker.Message, opts
 						}
 					} else if sub.opts.AutoAck {
 						if err = ms.Ack(); err != nil {
-							m.opts.Logger.Error(m.opts.Context, "broker ack error", err)
+							m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
 						}
 					}
 					// single processing
@ -217,11 +217,11 @@ func (m *memoryBroker) publish(ctx context.Context, msgs []*broker.Message, opts
 							if eh != nil {
 								_ = eh(p)
 							} else if m.opts.Logger.V(logger.ErrorLevel) {
-								m.opts.Logger.Error(m.opts.Context, "broker handler error", err)
+								m.opts.Logger.Error(m.opts.Context, err.Error())
 							}
 						} else if sub.opts.AutoAck {
 							if err = p.Ack(); err != nil {
-								m.opts.Logger.Error(m.opts.Context, "broker ack error", err)
+								m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
 							}
 						}
 					}
@ -373,10 +373,6 @@ func (m *memoryEvent) SetError(err error) {
 	m.err = err
 }

-func (m *memoryEvent) Context() context.Context {
-	return m.opts.Context
-}
-
 func (m *memorySubscriber) Options() broker.SubscribeOptions {
 	return m.opts
 }
--- a/client/client.go
+++ b/client/client.go
@ -1,5 +1,5 @@
 // Package client is an interface for an RPC client
-package client
+package client // import "go.unistack.org/micro/v3/client"

 import (
 	"context"
--- a/codec/codec.go
+++ b/codec/codec.go
@ -1,8 +1,19 @@
 // Package codec is an interface for encoding messages
-package codec
+package codec // import "go.unistack.org/micro/v3/codec"

 import (
 	"errors"
+	"io"
+
+	"go.unistack.org/micro/v3/metadata"
+)
+
+// Message types
+const (
+	Error MessageType = iota
+	Request
+	Response
+	Event
 )

 var (
@ -13,23 +24,65 @@ var (
 )

 var (
+	// DefaultMaxMsgSize specifies how much data codec can handle
+	DefaultMaxMsgSize = 1024 * 1024 * 4 // 4Mb
 	// DefaultCodec is the global default codec
 	DefaultCodec = NewCodec()
 	// DefaultTagName specifies struct tag name to control codec Marshal/Unmarshal
 	DefaultTagName = "codec"
 )

-// Codec encodes/decodes various types of messages.
+// MessageType specifies message type for codec
+type MessageType int
+
+// Codec encodes/decodes various types of messages used within micro.
+// ReadHeader and ReadBody are called in pairs to read requests/responses
+// from the connection. Close is called when finished with the
+// connection. ReadBody may be called with a nil argument to force the
+// body to be read and discarded.
 type Codec interface {
+	ReadHeader(r io.Reader, m *Message, mt MessageType) error
+	ReadBody(r io.Reader, v interface{}) error
+	Write(w io.Writer, m *Message, v interface{}) error
 	Marshal(v interface{}, opts ...Option) ([]byte, error)
 	Unmarshal(b []byte, v interface{}, opts ...Option) error
 	String() string
 }

-type CodecV2 interface {
-	Marshal(buf []byte, v interface{}, opts ...Option) ([]byte, error)
-	Unmarshal(buf []byte, v interface{}, opts ...Option) error
-	String() string
+// Message represents detailed information about
+// the communication, likely followed by the body.
+// In the case of an error, body may be nil.
+type Message struct {
+	Header   metadata.Metadata
+	Target   string
+	Method   string
+	Endpoint string
+	Error    string
+	ID       string
+	Body     []byte
+	Type     MessageType
+}
+
+// NewMessage creates new codec message
+func NewMessage(t MessageType) *Message {
+	return &Message{Type: t, Header: metadata.New(0)}
+}
+
+// MarshalAppend calls codec.Marshal(v) and returns the data appended to buf.
+// If codec implements MarshalAppend, that is called instead.
+func MarshalAppend(buf []byte, c Codec, v interface{}, opts ...Option) ([]byte, error) {
+	if nc, ok := c.(interface {
+		MarshalAppend([]byte, interface{}, ...Option) ([]byte, error)
+	}); ok {
+		return nc.MarshalAppend(buf, v, opts...)
+	}
+
+	mbuf, err := c.Marshal(v, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return append(buf, mbuf...), nil
 }

 // RawMessage is a raw encoded JSON value.
@ -40,8 +93,6 @@ type RawMessage []byte
 func (m *RawMessage) MarshalJSON() ([]byte, error) {
 	if m == nil {
 		return []byte("null"), nil
-	} else if len(*m) == 0 {
-		return []byte("null"), nil
 	}
 	return *m, nil
 }
--- a/codec/noop.go
+++ b/codec/noop.go
@ -2,14 +2,70 @@ package codec

 import (
 	"encoding/json"
-
-	codecpb "go.unistack.org/micro-proto/v3/codec"
+	"io"
 )

 type noopCodec struct {
 	opts Options
 }

+func (c *noopCodec) ReadHeader(conn io.Reader, m *Message, t MessageType) error {
+	return nil
+}
+
+func (c *noopCodec) ReadBody(conn io.Reader, b interface{}) error {
+	// read bytes
+	buf, err := io.ReadAll(conn)
+	if err != nil {
+		return err
+	}
+
+	if b == nil {
+		return nil
+	}
+
+	switch v := b.(type) {
+	case *string:
+		*v = string(buf)
+	case *[]byte:
+		*v = buf
+	case *Frame:
+		v.Data = buf
+	default:
+		return json.Unmarshal(buf, v)
+	}
+
+	return nil
+}
+
+func (c *noopCodec) Write(conn io.Writer, m *Message, b interface{}) error {
+	if b == nil {
+		return nil
+	}
+
+	var v []byte
+	switch vb := b.(type) {
+	case *Frame:
+		v = vb.Data
+	case string:
+		v = []byte(vb)
+	case *string:
+		v = []byte(*vb)
+	case *[]byte:
+		v = *vb
+	case []byte:
+		v = vb
+	default:
+		var err error
+		v, err = json.Marshal(vb)
+		if err != nil {
+			return err
+		}
+	}
+	_, err := conn.Write(v)
+	return err
+}
+
 func (c *noopCodec) String() string {
 	return "noop"
 }
@ -35,8 +91,8 @@ func (c *noopCodec) Marshal(v interface{}, opts ...Option) ([]byte, error) {
 		return ve, nil
 	case *Frame:
 		return ve.Data, nil
-	case *codecpb.Frame:
-		return ve.Data, nil
+	case *Message:
+		return ve.Body, nil
 	}

 	return json.Marshal(v)
@ -59,8 +115,8 @@ func (c *noopCodec) Unmarshal(d []byte, v interface{}, opts ...Option) error {
 	case *Frame:
 		ve.Data = d
 		return nil
-	case *codecpb.Frame:
-		ve.Data = d
+	case *Message:
+		ve.Body = d
 		return nil
 	}

--- a/codec/options.go
+++ b/codec/options.go
@ -23,8 +23,15 @@ type Options struct {
 	Context context.Context
 	// TagName specifies tag name in struct to control codec
 	TagName string
-	// Flatten specifies that struct must be analyzed for flatten tag
-	Flatten bool
+	// MaxMsgSize specifies max messages size that reads by codec
+	MaxMsgSize int
+}
+
+// MaxMsgSize sets the max message size
+func MaxMsgSize(n int) Option {
+	return func(o *Options) {
+		o.MaxMsgSize = n
+	}
 }

 // TagName sets the codec tag name in struct
@ -34,13 +41,6 @@ func TagName(n string) Option {
 	}
 }

-// Flatten enables checking for flatten tag name
-func Flatten(b bool) Option {
-	return func(o *Options) {
-		o.Flatten = b
-	}
-}
-
 // Logger sets the logger
 func Logger(l logger.Logger) Option {
 	return func(o *Options) {
@ -69,8 +69,8 @@ func NewOptions(opts ...Option) Options {
 		Logger:     logger.DefaultLogger,
 		Meter:      meter.DefaultMeter,
 		Tracer:     tracer.DefaultTracer,
+		MaxMsgSize: DefaultMaxMsgSize,
 		TagName:    DefaultTagName,
-		Flatten: false,
 	}

 	for _, o := range opts {
--- a/config/config.go
+++ b/config/config.go
@ -1,10 +1,9 @@
 // Package config is an interface for dynamic configuration.
-package config
+package config // import "go.unistack.org/micro/v3/config"

 import (
 	"context"
 	"errors"
-	"fmt"
 	"reflect"
 	"time"
 )
@ -139,7 +138,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Error(ctx, fmt.Sprintf("%s BeforeLoad error", c.String()), err)
+				c.Options().Logger.Errorf(ctx, "%s BeforeLoad err: %v", c.String(), err)
 				if !c.Options().AllowFail {
 					return err
 				}
@ -154,7 +153,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Error(ctx, fmt.Sprintf("%s AfterLoad error", c.String()), err)
+				c.Options().Logger.Errorf(ctx, "%s AfterLoad err: %v", c.String(), err)
 				if !c.Options().AllowFail {
 					return err
 				}
@ -169,7 +168,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Error(ctx, fmt.Sprintf("%s BeforeSave error", c.String()), err)
+				c.Options().Logger.Errorf(ctx, "%s BeforeSave err: %v", c.String(), err)
 				if !c.Options().AllowFail {
 					return err
 				}
@ -184,7 +183,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Error(ctx, fmt.Sprintf("%s AfterSave error", c.String()), err)
+				c.Options().Logger.Errorf(ctx, "%s AfterSave err: %v", c.String(), err)
 				if !c.Options().AllowFail {
 					return err
 				}
@ -199,7 +198,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Error(ctx, fmt.Sprintf("%s BeforeInit error", c.String()), err)
+				c.Options().Logger.Errorf(ctx, "%s BeforeInit err: %v", c.String(), err)
 				if !c.Options().AllowFail {
 					return err
 				}
@ -214,7 +213,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Error(ctx, fmt.Sprintf("%s AfterInit error", c.String(), err), err)
+				c.Options().Logger.Errorf(ctx, "%s AfterInit err: %v", c.String(), err)
 				if !c.Options().AllowFail {
 					return err
 				}
--- a/errors/errors.go
+++ b/errors/errors.go
@ -1,6 +1,6 @@
 // Package errors provides a way to return detailed information
 // for an RPC request error. The error is normally JSON encoded.
-package errors
+package errors // import "go.unistack.org/micro/v3/errors"

 import (
 	"bytes"
@ -44,20 +44,6 @@ var (
 	ErrGatewayTimeout = &Error{Code: 504}
 )

-const ProblemContentType = "application/problem+json"
-
-type Problem struct {
-	Type     string `json:"type,omitempty"`
-	Title    string `json:"title,omitempty"`
-	Detail   string `json:"detail,omitempty"`
-	Instance string `json:"instance,omitempty"`
-	Errors   []struct {
-		Title  string `json:"title,omitempty"`
-		Detail string `json:"detail,omitempty"`
-	} `json:"errors,omitempty"`
-	Status int `json:"status,omitempty"`
-}
-
 // Error type
 type Error struct {
 	// ID holds error id or service, usually someting like my_service or id
--- a/flow/default.go
+++ b/flow/default.go
@ -188,7 +188,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 	steps, err := w.getSteps(options.Start, options.Reverse)
 	if err != nil {
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusPending.String())}); werr != nil {
-			w.opts.Logger.Error(w.opts.Context, "store write error", werr)
+			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
 		return "", err
 	}
@ -212,7 +212,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 	done := make(chan struct{})

 	if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusRunning.String())}); werr != nil {
-		w.opts.Logger.Error(w.opts.Context, "store write error", werr)
+		w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		return eid, werr
 	}
 	for idx := range steps {
@ -237,7 +237,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 					return
 				}
 				if w.opts.Logger.V(logger.TraceLevel) {
-					w.opts.Logger.Trace(nctx, fmt.Sprintf("will be executed %v", steps[idx][nidx]))
+					w.opts.Logger.Tracef(nctx, "will be executed %v", steps[idx][nidx])
 				}
 				cstep := steps[idx][nidx]
 				// nolint: nestif
@ -257,21 +257,21 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 						if serr != nil {
 							step.SetStatus(StatusFailure)
 							if werr := stepStore.Write(ctx, step.ID()+w.opts.Store.Options().Separator+"rsp", serr); werr != nil && w.opts.Logger.V(logger.ErrorLevel) {
-								w.opts.Logger.Error(ctx, "store write error", werr)
+								w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 							}
 							if werr := stepStore.Write(ctx, step.ID()+w.opts.Store.Options().Separator+"status", &codec.Frame{Data: []byte(StatusFailure.String())}); werr != nil && w.opts.Logger.V(logger.ErrorLevel) {
-								w.opts.Logger.Error(ctx, "store write error", werr)
+								w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 							}
 							cherr <- serr
 							return
 						}
 						if werr := stepStore.Write(ctx, step.ID()+w.opts.Store.Options().Separator+"rsp", rsp); werr != nil {
-							w.opts.Logger.Error(ctx, "store write error", werr)
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 							cherr <- werr
 							return
 						}
 						if werr := stepStore.Write(ctx, step.ID()+w.opts.Store.Options().Separator+"status", &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
-							w.opts.Logger.Error(ctx, "store write error", werr)
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 							cherr <- werr
 							return
 						}
@ -290,16 +290,16 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 					if serr != nil {
 						cstep.SetStatus(StatusFailure)
 						if werr := stepStore.Write(ctx, cstep.ID()+w.opts.Store.Options().Separator+"rsp", serr); werr != nil && w.opts.Logger.V(logger.ErrorLevel) {
-							w.opts.Logger.Error(ctx, "store write error", werr)
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 						}
 						if werr := stepStore.Write(ctx, cstep.ID()+w.opts.Store.Options().Separator+"status", &codec.Frame{Data: []byte(StatusFailure.String())}); werr != nil && w.opts.Logger.V(logger.ErrorLevel) {
-							w.opts.Logger.Error(ctx, "store write error", werr)
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 						}
 						cherr <- serr
 						return
 					}
 					if werr := stepStore.Write(ctx, cstep.ID()+w.opts.Store.Options().Separator+"rsp", rsp); werr != nil {
-						w.opts.Logger.Error(ctx, "store write error", werr)
+						w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 						cherr <- werr
 						return
 					}
@ -317,7 +317,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 		return eid, nil
 	}

-	logger.DefaultLogger.Trace(ctx, "wait for finish or error")
+	logger.Tracef(ctx, "wait for finish or error")
 	select {
 	case <-nctx.Done():
 		err = nctx.Err()
@ -333,15 +333,15 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 	switch {
 	case nctx.Err() != nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusAborted.String())}); werr != nil {
-			w.opts.Logger.Error(w.opts.Context, "store write error", werr)
+			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
 	case err == nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
-			w.opts.Logger.Error(w.opts.Context, "store write error", werr)
+			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
 	case err != nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusFailure.String())}); werr != nil {
-			w.opts.Logger.Error(w.opts.Context, "store write error", werr)
+			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
 	}

--- a/flow/flow.go
+++ b/flow/flow.go
@ -1,5 +1,5 @@
 // Package flow is an interface used for saga pattern microservice workflow
-package flow
+package flow // import "go.unistack.org/micro/v3/flow"

 import (
 	"context"
--- a/fsm/fsm.go
+++ b/fsm/fsm.go
@ -1,4 +1,4 @@
-package fsm
+package fsm // import "go.unistack.org/micro/v3/fsm"

 import (
 	"context"
--- a/fsm/fsm_test.go
+++ b/fsm/fsm_test.go
@ -17,7 +17,7 @@ func TestFSMStart(t *testing.T) {

 	wrapper := func(next StateFunc) StateFunc {
 		return func(sctx context.Context, s State, opts ...StateOption) (State, error) {
-			sctx = logger.NewContext(sctx, logger.DefaultLogger.Fields("state", s.Name()))
+			sctx = logger.NewContext(sctx, logger.Fields("state", s.Name()))
 			return next(sctx, s, opts...)
 		}
 	}
--- a/go.mod
+++ b/go.mod
@ -1,32 +1,20 @@
 module go.unistack.org/micro/v3

-go 1.22
+go 1.20

 require (
 	dario.cat/mergo v1.0.0
 	github.com/DATA-DOG/go-sqlmock v1.5.0
-	github.com/KimMachineGun/automemlimit v0.6.1
 	github.com/google/uuid v1.3.0
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5
-	go.uber.org/automaxprocs v1.6.0
-	go.unistack.org/micro-proto/v3 v3.4.1
 	golang.org/x/sync v0.3.0
 	google.golang.org/grpc v1.57.0
-	google.golang.org/protobuf v1.33.0
+	google.golang.org/protobuf v1.31.0
 )

 require (
-	github.com/cilium/ebpf v0.9.1 // indirect
-	github.com/containerd/cgroups/v3 v3.0.1 // indirect
-	github.com/coreos/go-systemd/v22 v22.3.2 // indirect
-	github.com/docker/go-units v0.4.0 // indirect
-	github.com/godbus/dbus/v5 v5.0.4 // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
-	github.com/opencontainers/runtime-spec v1.0.2 // indirect
-	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
-	github.com/sirupsen/logrus v1.8.1 // indirect
 	golang.org/x/net v0.14.0 // indirect
-	golang.org/x/sys v0.11.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20230526203410-71b5a4ffd15e // indirect
 )
--- a/go.sum
+++ b/go.sum
@ -2,68 +2,23 @@ dario.cat/mergo v1.0.0 h1:AGCNq9Evsj31mOgNPcLyXc+4PNABt905YmuqPYYpBWk=
 dario.cat/mergo v1.0.0/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk=
 github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20OEh60=
 github.com/DATA-DOG/go-sqlmock v1.5.0/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
-github.com/KimMachineGun/automemlimit v0.6.1 h1:ILa9j1onAAMadBsyyUJv5cack8Y1WT26yLj/V+ulKp8=
-github.com/KimMachineGun/automemlimit v0.6.1/go.mod h1:T7xYht7B8r6AG/AqFcUdc7fzd2bIdBKmepfP2S1svPY=
-github.com/cilium/ebpf v0.9.1 h1:64sn2K3UKw8NbP/blsixRpF3nXuyhz/VjRlRzvlBRu4=
-github.com/cilium/ebpf v0.9.1/go.mod h1:+OhNOIXx/Fnu1IE8bJz2dzOA+VSfyTfdNUVdlQnxUFY=
-github.com/containerd/cgroups/v3 v3.0.1 h1:4hfGvu8rfGIwVIDd+nLzn/B9ZXx4BcCjzt5ToenJRaE=
-github.com/containerd/cgroups/v3 v3.0.1/go.mod h1:/vtwk1VXrtoa5AaZLkypuOJgA/6DyPMZHJPGQNtlHnw=
-github.com/coreos/go-systemd/v22 v22.3.2 h1:D9/bQk5vlXQFZ6Kwuu6zaiXJ9oTPe68++AzAJc1DzSI=
-github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/docker/go-units v0.4.0 h1:3uh0PgVws3nIA0Q+MwDC8yjEPf9zjRfZZWXZYDct3Tw=
-github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
-github.com/frankban/quicktest v1.14.0 h1:+cqqvzZV87b4adx/5ayVOaYZ2CrvM4ejQvUdBzPPUss=
-github.com/frankban/quicktest v1.14.0/go.mod h1:NeW+ay9A/U67EYXNFA1nPE8e/tnQv/09mUdL/ijj8og=
-github.com/godbus/dbus/v5 v5.0.4 h1:9349emZab16e7zQvpmsbtjc18ykshndd8y2PG3sgJbA=
-github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
-github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
-github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
-github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
-github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/opencontainers/runtime-spec v1.0.2 h1:UfAcuLBJB9Coz72x1hgl8O5RVzTdNiaglX6v2DM6FI0=
-github.com/opencontainers/runtime-spec v1.0.2/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
 github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaRUnok+kx1WdO15EQc=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
-github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 h1:onHthvaw9LFnH4t2DcNVpwGmV9E1BkGknEliJkfwQj0=
-github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58/go.mod h1:DXv8WO4yhMYhSNPKjeNKa5WY9YCIEBRbNzFFPJbWO6Y=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prashantv/gostub v1.1.0 h1:BTyx3RfQjRHnUWaGF9oQos79AlQ5k8WNktv7VGvVH4g=
-github.com/prashantv/gostub v1.1.0/go.mod h1:A5zLQHz7ieHGG7is6LLXLz7I8+3LZzsrV0P1IAHhP5U=
-github.com/rogpeppe/go-internal v1.6.1 h1:/FiVV8dS/e+YqF2JvO3yXRFbBLTIuSDkuC7aBOAvL+k=
-github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
 github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5 h1:G/FZtUu7a6NTWl3KUHMV9jkLAh/Rvtf03NWMHaEDl+E=
 github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
-github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
-github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
-github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
-github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PKk=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-go.uber.org/automaxprocs v1.6.0 h1:O3y2/QNTOdbF+e/dpXNNW7Rx2hZ4sTIPyybbxyNqTUs=
-go.uber.org/automaxprocs v1.6.0/go.mod h1:ifeIMSnPZuznNm6jmdzmU3/bfk01Fe2fotchwEFJ8r8=
-go.uber.org/goleak v1.1.12 h1:gZAh5/EyT/HQwlpkCy6wTpqfH9H8Lz8zbm3dZh+OyzA=
-go.uber.org/goleak v1.1.12/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
-go.unistack.org/micro-proto/v3 v3.4.1 h1:UTjLSRz2YZuaHk9iSlVqqsA50JQNAEK2ZFboGqtEa9Q=
-go.unistack.org/micro-proto/v3 v3.4.1/go.mod h1:okx/cnOhzuCX0ggl/vToatbCupi0O44diiiLLsZ93Zo=
 golang.org/x/net v0.14.0 h1:BONx9s002vGdD9umnlX1Po8vOZmrgH34qlHcD1MfK14=
 golang.org/x/net v0.14.0/go.mod h1:PpSgVXXLK0OxS0F31C1/tv6XNguvCrnXIDrFMspZIUI=
 golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
 golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
-golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.12.0 h1:k+n5B8goJNdU7hSvEtMUz3d1Q6D/XW4COJSJR6fN0mc=
-golang.org/x/text v0.12.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20230526203410-71b5a4ffd15e h1:NumxXLPfHSndr3wBBdeKiVHjGVFzi9RX2HwwQke94iY=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20230526203410-71b5a4ffd15e/go.mod h1:66JfowdXAEgad5O9NnYcsNPLCPZJD++2L9X0PCMODrA=
@ -71,8 +26,8 @@ google.golang.org/grpc v1.57.0 h1:kfzNeI/klCGD2YPMUlaGNT3pxvYfga7smW3Vth8Zsiw=
 google.golang.org/grpc v1.57.0/go.mod h1:Sd+9RMTACXwmub0zcNY2c4arhtrbBYD1AUHI/dt16Mo=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
+google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
--- a/logger/context.go
+++ b/logger/context.go
@ -4,17 +4,6 @@ import "context"

 type loggerKey struct{}

-// MustContext returns logger from passed context or DefaultLogger if empty
-func MustContext(ctx context.Context) Logger {
-	if ctx == nil {
-		return DefaultLogger
-	}
-	if l, ok := ctx.Value(loggerKey{}).(Logger); ok && l != nil {
-		return l
-	}
-	return DefaultLogger
-}
-
 // FromContext returns logger from passed context
 func FromContext(ctx context.Context) (Logger, bool) {
 	if ctx == nil {
--- a/logger/logger.go
+++ b/logger/logger.go
@ -1,5 +1,5 @@
 // Package logger provides a log interface
-package logger
+package logger // import "go.unistack.org/micro/v3/logger"

 import (
 	"context"
@ -14,6 +14,8 @@ var (
 	DefaultLogger Logger = NewLogger()
 	// DefaultLevel used by logger
 	DefaultLevel = InfoLevel
+	// DefaultCallerSkipCount used by logger
+	DefaultCallerSkipCount = 2
 )

 // Logger is a generic logging interface
@ -31,19 +33,33 @@ type Logger interface {
 	// Fields set fields to always be logged with keyval pairs
 	Fields(fields ...interface{}) Logger
 	// Info level message
-	Info(ctx context.Context, msg string, args ...interface{})
+	Info(ctx context.Context, args ...interface{})
 	// Trace level message
-	Trace(ctx context.Context, msg string, args ...interface{})
+	Trace(ctx context.Context, args ...interface{})
 	// Debug level message
-	Debug(ctx context.Context, msg string, args ...interface{})
+	Debug(ctx context.Context, args ...interface{})
 	// Warn level message
-	Warn(ctx context.Context, msg string, args ...interface{})
+	Warn(ctx context.Context, args ...interface{})
 	// Error level message
-	Error(ctx context.Context, msg string, args ...interface{})
+	Error(ctx context.Context, args ...interface{})
 	// Fatal level message
-	Fatal(ctx context.Context, msg string, args ...interface{})
+	Fatal(ctx context.Context, args ...interface{})
+	// Infof level message
+	Infof(ctx context.Context, msg string, args ...interface{})
+	// Tracef level message
+	Tracef(ctx context.Context, msg string, args ...interface{})
+	// Debug level message
+	Debugf(ctx context.Context, msg string, args ...interface{})
+	// Warn level message
+	Warnf(ctx context.Context, msg string, args ...interface{})
+	// Error level message
+	Errorf(ctx context.Context, msg string, args ...interface{})
+	// Fatal level message
+	Fatalf(ctx context.Context, msg string, args ...interface{})
 	// Log logs message with needed level
-	Log(ctx context.Context, level Level, msg string, args ...interface{})
+	Log(ctx context.Context, level Level, args ...interface{})
+	// Logf logs message with needed level
+	Logf(ctx context.Context, level Level, msg string, args ...interface{})
 	// Name returns broker instance name
 	Name() string
 	// String returns the type of logger
@ -52,3 +68,108 @@ type Logger interface {

 // Field contains keyval pair
 type Field interface{}
+
+// Info writes msg to default logger on info level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Info(ctx context.Context, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Info(ctx, args...)
+}
+
+// Error writes msg to default logger on error level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Error(ctx context.Context, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Error(ctx, args...)
+}
+
+// Debug writes msg to default logger on debug level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Debug(ctx context.Context, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Debug(ctx, args...)
+}
+
+// Warn writes msg to default logger on warn level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Warn(ctx context.Context, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Warn(ctx, args...)
+}
+
+// Trace writes msg to default logger on trace level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Trace(ctx context.Context, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Trace(ctx, args...)
+}
+
+// Fatal writes msg to default logger on fatal level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Fatal(ctx context.Context, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Fatal(ctx, args...)
+}
+
+// Infof writes formatted msg to default logger on info level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Infof(ctx context.Context, msg string, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Infof(ctx, msg, args...)
+}
+
+// Errorf writes formatted msg to default logger on error level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Errorf(ctx context.Context, msg string, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Errorf(ctx, msg, args...)
+}
+
+// Debugf writes formatted msg to default logger on debug level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Debugf(ctx context.Context, msg string, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Debugf(ctx, msg, args...)
+}
+
+// Warnf writes formatted msg to default logger on warn level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Warnf(ctx context.Context, msg string, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Warnf(ctx, msg, args...)
+}
+
+// Tracef writes formatted msg to default logger on trace level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Tracef(ctx context.Context, msg string, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Tracef(ctx, msg, args...)
+}
+
+// Fatalf writes formatted msg to default logger on fatal level
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Fatalf(ctx context.Context, msg string, args ...interface{}) {
+	DefaultLogger.Clone(WithCallerSkipCount(DefaultCallerSkipCount+1)).Fatalf(ctx, msg, args...)
+}
+
+// V returns true if passed level enabled in default logger
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func V(level Level) bool {
+	return DefaultLogger.V(level)
+}
+
+// Init initialize logger
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Init(opts ...Option) error {
+	return DefaultLogger.Init(opts...)
+}
+
+// Fields create logger with specific fields
+//
+// Deprecated: Dont use logger methods directly, use instance of logger to avoid additional allocations
+func Fields(fields ...interface{}) Logger {
+	return DefaultLogger.Fields(fields...)
+}
--- a/logger/noop.go
+++ b/logger/noop.go
@ -4,17 +4,12 @@ import (
 	"context"
 )

-const (
-	defaultCallerSkipCount = 2
-)
-
 type noopLogger struct {
 	opts Options
 }

 func NewLogger(opts ...Option) Logger {
 	options := NewOptions(opts...)
-	options.CallerSkipCount = defaultCallerSkipCount
 	return &noopLogger{opts: options}
 }

@ -56,23 +51,44 @@ func (l *noopLogger) String() string {
 	return "noop"
 }

-func (l *noopLogger) Log(ctx context.Context, lvl Level, msg string, attrs ...interface{}) {
+func (l *noopLogger) Log(ctx context.Context, lvl Level, attrs ...interface{}) {
 }

-func (l *noopLogger) Info(ctx context.Context, msg string, attrs ...interface{}) {
+func (l *noopLogger) Info(ctx context.Context, attrs ...interface{}) {
 }

-func (l *noopLogger) Debug(ctx context.Context, msg string, attrs ...interface{}) {
+func (l *noopLogger) Debug(ctx context.Context, attrs ...interface{}) {
 }

-func (l *noopLogger) Error(ctx context.Context, msg string, attrs ...interface{}) {
+func (l *noopLogger) Error(ctx context.Context, attrs ...interface{}) {
 }

-func (l *noopLogger) Trace(ctx context.Context, msg string, attrs ...interface{}) {
+func (l *noopLogger) Trace(ctx context.Context, attrs ...interface{}) {
 }

-func (l *noopLogger) Warn(ctx context.Context, msg string, attrs ...interface{}) {
+func (l *noopLogger) Warn(ctx context.Context, attrs ...interface{}) {
 }

-func (l *noopLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
+func (l *noopLogger) Fatal(ctx context.Context, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Logf(ctx context.Context, lvl Level, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Infof(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Debugf(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Errorf(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Tracef(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Warnf(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Fatalf(ctx context.Context, msg string, attrs ...interface{}) {
 }
--- a/logger/options.go
+++ b/logger/options.go
@ -6,8 +6,6 @@ import (
 	"log/slog"
 	"os"
 	"time"
-
-	"go.unistack.org/micro/v3/meter"
 )

 // Option func signature
@ -23,7 +21,7 @@ type Options struct {
 	Name string
 	// Fields holds additional metadata
 	Fields []interface{}
-	// callerSkipCount number of frmaes to skip
+	// CallerSkipCount number of frmaes to skip
 	CallerSkipCount int
 	// ContextAttrFuncs contains funcs that executed before log func on context
 	ContextAttrFuncs []ContextAttrFunc
@ -47,8 +45,6 @@ type Options struct {
 	Level Level
 	// TimeFunc used to obtain current time
 	TimeFunc func() time.Time
-	// Meter used to count logs for specific level
-	Meter meter.Meter
 }

 // NewOptions creates new options struct
@ -57,11 +53,11 @@ func NewOptions(opts ...Option) Options {
 		Level:            DefaultLevel,
 		Fields:           make([]interface{}, 0, 6),
 		Out:              os.Stderr,
+		CallerSkipCount:  DefaultCallerSkipCount,
 		Context:          context.Background(),
 		ContextAttrFuncs: DefaultContextAttrFuncs,
 		AddSource:        true,
 		TimeFunc:         time.Now,
-		Meter:            meter.DefaultMeter,
 	}

 	WithMicroKeys()(&options)
@ -73,7 +69,7 @@ func NewOptions(opts ...Option) Options {
 	return options
 }

-// WithContextAttrFuncs appends default funcs for the context attrs filler
+// WithContextAttrFuncs appends default funcs for the context arrts filler
 func WithContextAttrFuncs(fncs ...ContextAttrFunc) Option {
 	return func(o *Options) {
 		o.ContextAttrFuncs = append(o.ContextAttrFuncs, fncs...)
@ -101,20 +97,27 @@ func WithOutput(out io.Writer) Option {
 	}
 }

-// WithAddStacktrace controls writing stacktrace on error
+// WitAddStacktrace controls writing stacktrace on error
 func WithAddStacktrace(v bool) Option {
 	return func(o *Options) {
 		o.AddStacktrace = v
 	}
 }

-// WithAddSource controls writing source file and pos in log
+// WitAddSource controls writing source file and pos in log
 func WithAddSource(v bool) Option {
 	return func(o *Options) {
 		o.AddSource = v
 	}
 }

+// WithCallerSkipCount set frame count to skip
+func WithCallerSkipCount(c int) Option {
+	return func(o *Options) {
+		o.CallerSkipCount = c
+	}
+}
+
 // WithContext set context
 func WithContext(ctx context.Context) Option {
 	return func(o *Options) {
@ -129,13 +132,6 @@ func WithName(n string) Option {
 	}
 }

-// WithMeter sets the meter
-func WithMeter(m meter.Meter) Option {
-	return func(o *Options) {
-		o.Meter = m
-	}
-}
-
 // WithTimeFunc sets the func to obtain current time
 func WithTimeFunc(fn func() time.Time) Option {
 	return func(o *Options) {
@ -190,8 +186,6 @@ func WithMicroKeys() Option {
 // WithAddCallerSkipCount add skip count for copy logger
 func WithAddCallerSkipCount(n int) Option {
 	return func(o *Options) {
-		if n > 0 {
 		o.CallerSkipCount += n
 	}
-	}
 }
--- a/logger/slog/slog.go
+++ b/logger/slog/slog.go
@ -2,6 +2,7 @@ package slog

 import (
 	"context"
+	"fmt"
 	"log/slog"
 	"os"
 	"regexp"
@ -10,16 +11,9 @@ import (
 	"sync"

 	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/semconv"
 	"go.unistack.org/micro/v3/tracer"
 )

-const (
-	badKey = "!BADKEY"
-	// defaultCallerSkipCount used by logger
-	defaultCallerSkipCount = 3
-)
-
 var reTrace = regexp.MustCompile(`.*/slog/logger\.go.*\n`)

 var (
@ -76,19 +70,24 @@ type slogLogger struct {
 func (s *slogLogger) Clone(opts ...logger.Option) logger.Logger {
 	s.mu.RLock()
 	options := s.opts
-	level := s.leveler.Level()
 	s.mu.RUnlock()

 	for _, o := range opts {
 		o(&options)
 	}

-	l := &slogLogger{opts: options}
+	l := &slogLogger{
+		opts: options,
+	}

 	l.leveler = new(slog.LevelVar)
-	l.leveler.Set(level)
-	attrs, _ := s.argsAttrs(l.opts.Fields)
-	l.handler = s.handler.WithAttrs(attrs)
+	handleOpt := &slog.HandlerOptions{
+		ReplaceAttr: l.renameAttr,
+		Level:       l.leveler,
+		AddSource:   l.opts.AddSource,
+	}
+	l.leveler.Set(loggerToSlogLevel(l.opts.Level))
+	l.handler = slog.New(slog.NewJSONHandler(options.Out, handleOpt)).With(options.Fields...).Handler()

 	return l
 }
@ -105,7 +104,7 @@ func (s *slogLogger) Options() logger.Options {
 	return s.opts
 }

-func (s *slogLogger) Fields(fields ...interface{}) logger.Logger {
+func (s *slogLogger) Fields(attrs ...interface{}) logger.Logger {
 	s.mu.RLock()
 	level := s.leveler.Level()
 	options := s.opts
@ -115,8 +114,13 @@ func (s *slogLogger) Fields(fields ...interface{}) logger.Logger {
 	l.leveler = new(slog.LevelVar)
 	l.leveler.Set(level)

-	attrs, _ := s.argsAttrs(fields)
-	l.handler = s.handler.WithAttrs(attrs)
+	handleOpt := &slog.HandlerOptions{
+		ReplaceAttr: l.renameAttr,
+		Level:       l.leveler,
+		AddSource:   l.opts.AddSource,
+	}
+
+	l.handler = slog.New(slog.NewJSONHandler(l.opts.Out, handleOpt)).With(attrs...).Handler()

 	return l
 }
@ -145,33 +149,372 @@ func (s *slogLogger) Init(opts ...logger.Option) error {
 	return nil
 }

-func (s *slogLogger) Log(ctx context.Context, lvl logger.Level, msg string, attrs ...interface{}) {
-	s.printLog(ctx, lvl, msg, attrs...)
+func (s *slogLogger) Log(ctx context.Context, lvl logger.Level, attrs ...interface{}) {
+	if !s.V(lvl) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), loggerToSlogLevel(lvl), fmt.Sprintf("%s", attrs[0]), pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	if s.opts.AddStacktrace && lvl == logger.ErrorLevel {
+		stackInfo := make([]byte, 1024*1024)
+		if stackSize := runtime.Stack(stackInfo, false); stackSize > 0 {
+			traceLines := reTrace.Split(string(stackInfo[:stackSize]), -1)
+			if len(traceLines) != 0 {
+				attrs = append(attrs, slog.String(s.opts.StacktraceKey, traceLines[len(traceLines)-1]))
+			}
+		}
+	}
+	r.Add(attrs[1:]...)
+	r.Attrs(func(a slog.Attr) bool {
+		if a.Key == s.opts.ErrorKey {
+			if span, ok := tracer.SpanFromContext(ctx); ok {
+				span.SetStatus(tracer.SpanStatusError, a.Value.String())
+				return false
+			}
+		}
+		return true
+	})
+	_ = s.handler.Handle(ctx, r)
 }

-func (s *slogLogger) Info(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.InfoLevel, msg, attrs...)
+func (s *slogLogger) Logf(ctx context.Context, lvl logger.Level, msg string, attrs ...interface{}) {
+	if !s.V(lvl) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), loggerToSlogLevel(lvl), msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	if s.opts.AddStacktrace && lvl == logger.ErrorLevel {
+		stackInfo := make([]byte, 1024*1024)
+		if stackSize := runtime.Stack(stackInfo, false); stackSize > 0 {
+			traceLines := reTrace.Split(string(stackInfo[:stackSize]), -1)
+			if len(traceLines) != 0 {
+				attrs = append(attrs, (slog.String(s.opts.StacktraceKey, traceLines[len(traceLines)-1])))
+			}
+		}
+	}
+	r.Add(attrs[1:]...)
+	r.Attrs(func(a slog.Attr) bool {
+		if a.Key == s.opts.ErrorKey {
+			if span, ok := tracer.SpanFromContext(ctx); ok {
+				span.SetStatus(tracer.SpanStatusError, a.Value.String())
+				return false
+			}
+		}
+		return true
+	})
+	_ = s.handler.Handle(ctx, r)
 }

-func (s *slogLogger) Debug(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.DebugLevel, msg, attrs...)
+func (s *slogLogger) Info(ctx context.Context, attrs ...interface{}) {
+	if !s.V(logger.InfoLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelInfo, fmt.Sprintf("%s", attrs[0]), pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs[1:]...)
+	_ = s.handler.Handle(ctx, r)
 }

-func (s *slogLogger) Trace(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.TraceLevel, msg, attrs...)
+func (s *slogLogger) Infof(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.InfoLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelInfo, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs...)
+	_ = s.handler.Handle(ctx, r)
 }

-func (s *slogLogger) Error(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.ErrorLevel, msg, attrs...)
+func (s *slogLogger) Debug(ctx context.Context, attrs ...interface{}) {
+	if !s.V(logger.DebugLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelDebug, fmt.Sprintf("%s", attrs[0]), pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs[1:]...)
+	_ = s.handler.Handle(ctx, r)
 }

-func (s *slogLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.FatalLevel, msg, attrs...)
+func (s *slogLogger) Debugf(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.DebugLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelDebug, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs...)
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Trace(ctx context.Context, attrs ...interface{}) {
+	if !s.V(logger.TraceLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelDebug-1, fmt.Sprintf("%s", attrs[0]), pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs[1:]...)
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Tracef(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.TraceLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelDebug-1, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs[1:]...)
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Error(ctx context.Context, attrs ...interface{}) {
+	if !s.V(logger.ErrorLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelError, fmt.Sprintf("%s", attrs[0]), pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	if s.opts.AddStacktrace {
+		stackInfo := make([]byte, 1024*1024)
+		if stackSize := runtime.Stack(stackInfo, false); stackSize > 0 {
+			traceLines := reTrace.Split(string(stackInfo[:stackSize]), -1)
+			if len(traceLines) != 0 {
+				attrs = append(attrs, slog.String("stacktrace", traceLines[len(traceLines)-1]))
+			}
+		}
+	}
+	r.Add(attrs[1:]...)
+	r.Attrs(func(a slog.Attr) bool {
+		if a.Key == s.opts.ErrorKey {
+			if span, ok := tracer.SpanFromContext(ctx); ok {
+				span.SetStatus(tracer.SpanStatusError, a.Value.String())
+				return false
+			}
+		}
+		return true
+	})
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Errorf(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.ErrorLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelError, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	if s.opts.AddStacktrace {
+		stackInfo := make([]byte, 1024*1024)
+		if stackSize := runtime.Stack(stackInfo, false); stackSize > 0 {
+			traceLines := reTrace.Split(string(stackInfo[:stackSize]), -1)
+			if len(traceLines) != 0 {
+				attrs = append(attrs, slog.String("stacktrace", traceLines[len(traceLines)-1]))
+			}
+		}
+	}
+	r.Add(attrs...)
+	r.Attrs(func(a slog.Attr) bool {
+		if a.Key == s.opts.ErrorKey {
+			if span, ok := tracer.SpanFromContext(ctx); ok {
+				span.SetStatus(tracer.SpanStatusError, a.Value.String())
+				return false
+			}
+		}
+		return true
+	})
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Fatal(ctx context.Context, attrs ...interface{}) {
+	if !s.V(logger.FatalLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelError+1, fmt.Sprintf("%s", attrs[0]), pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs[1:]...)
+	_ = s.handler.Handle(ctx, r)
 	os.Exit(1)
 }

-func (s *slogLogger) Warn(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.WarnLevel, msg, attrs...)
+func (s *slogLogger) Fatalf(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.FatalLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelError+1, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs...)
+	_ = s.handler.Handle(ctx, r)
+	os.Exit(1)
+}
+
+func (s *slogLogger) Warn(ctx context.Context, attrs ...interface{}) {
+	if !s.V(logger.WarnLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelWarn, fmt.Sprintf("%s", attrs[0]), pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs[1:]...)
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Warnf(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.WarnLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelWarn, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs[1:]...)
+	_ = s.handler.Handle(ctx, r)
 }

 func (s *slogLogger) Name() string {
@ -182,59 +525,10 @@ func (s *slogLogger) String() string {
 	return "slog"
 }

-func (s *slogLogger) printLog(ctx context.Context, lvl logger.Level, msg string, args ...interface{}) {
-	if !s.V(lvl) {
-		return
-	}
-	var argError error
-
-	s.opts.Meter.Counter(semconv.LoggerMessageTotal, "level", lvl.String()).Inc()
-
-	attrs, err := s.argsAttrs(args)
-	if err != nil {
-		argError = err
-	}
-	if argError != nil {
-		if span, ok := tracer.SpanFromContext(ctx); ok {
-			span.SetStatus(tracer.SpanStatusError, argError.Error())
-		}
-	}
-
-	for _, fn := range s.opts.ContextAttrFuncs {
-		ctxAttrs, err := s.argsAttrs(fn(ctx))
-		if err != nil {
-			argError = err
-		}
-		attrs = append(attrs, ctxAttrs...)
-	}
-	if argError != nil {
-		if span, ok := tracer.SpanFromContext(ctx); ok {
-			span.SetStatus(tracer.SpanStatusError, argError.Error())
-		}
-	}
-
-	if s.opts.AddStacktrace && lvl == logger.ErrorLevel {
-		stackInfo := make([]byte, 1024*1024)
-		if stackSize := runtime.Stack(stackInfo, false); stackSize > 0 {
-			traceLines := reTrace.Split(string(stackInfo[:stackSize]), -1)
-			if len(traceLines) != 0 {
-				attrs = append(attrs, slog.String(s.opts.StacktraceKey, traceLines[len(traceLines)-1]))
-			}
-		}
-	}
-
-	var pcs [1]uintptr
-	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, printLog, LogLvlMethod]
-	r := slog.NewRecord(s.opts.TimeFunc(), loggerToSlogLevel(lvl), msg, pcs[0])
-	r.AddAttrs(attrs...)
-	_ = s.handler.Handle(ctx, r)
-}
-
 func NewLogger(opts ...logger.Option) logger.Logger {
 	s := &slogLogger{
 		opts: logger.NewOptions(opts...),
 	}
-	s.opts.CallerSkipCount = defaultCallerSkipCount

 	return s
 }
@ -272,27 +566,3 @@ func slogToLoggerLevel(level slog.Level) logger.Level {
 		return logger.InfoLevel
 	}
 }
-
-func (s *slogLogger) argsAttrs(args []interface{}) ([]slog.Attr, error) {
-	attrs := make([]slog.Attr, 0, len(args))
-	var err error
-
-	for idx := 0; idx < len(args); idx++ {
-		switch arg := args[idx].(type) {
-		case slog.Attr:
-			attrs = append(attrs, arg)
-		case string:
-			if idx+1 < len(args) {
-				attrs = append(attrs, slog.Any(arg, args[idx+1]))
-				idx += 1
-			} else {
-				attrs = append(attrs, slog.String(badKey, arg))
-			}
-		case error:
-			attrs = append(attrs, slog.String(s.opts.ErrorKey, arg.Error()))
-			err = arg
-		}
-	}
-
-	return attrs, err
-}
--- a/logger/slog/slog_test.go
+++ b/logger/slog/slog_test.go
@ -3,68 +3,13 @@ package slog
 import (
 	"bytes"
 	"context"
-	"errors"
 	"fmt"
 	"log"
-	"strings"
 	"testing"

-	"github.com/google/uuid"
-	"go.unistack.org/micro/v3/metadata"
-
 	"go.unistack.org/micro/v3/logger"
 )

-func TestMultipleFieldsWithLevel(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.InfoLevel), logger.WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	l = l.Fields("key", "val")
-
-	l.Info(ctx, "msg1")
-	nl := l.Clone(logger.WithLevel(logger.DebugLevel))
-	nl.Debug(ctx, "msg2")
-	l.Debug(ctx, "msg3")
-	if !bytes.Contains(buf.Bytes(), []byte(`"key":"val"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"msg1"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"msg2"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-	if bytes.Contains(buf.Bytes(), []byte(`"msg3"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-func TestMultipleFields(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.InfoLevel), logger.WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	l = l.Fields("key", "val")
-
-	l = l.Fields("key1", "val1")
-
-	l.Info(ctx, "msg")
-
-	if !bytes.Contains(buf.Bytes(), []byte(`"key":"val"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"key1":"val1"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-}
-
 func TestError(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
@ -84,22 +29,13 @@ func TestError(t *testing.T) {

 func TestErrorf(t *testing.T) {
 	ctx := context.TODO()
-
 	buf := bytes.NewBuffer(nil)
 	l := NewLogger(logger.WithLevel(logger.ErrorLevel), logger.WithOutput(buf), logger.WithAddStacktrace(true))
-	if err := l.Init(logger.WithContextAttrFuncs(func(ctx context.Context) []interface{} {
-		return nil
-	})); err != nil {
+	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}

-	l.Log(ctx, logger.ErrorLevel, "message", errors.New("error msg"))
-
-	l.Log(ctx, logger.ErrorLevel, "", errors.New("error msg"))
-	if !bytes.Contains(buf.Bytes(), []byte(`"error":"error msg"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-
+	l.Errorf(ctx, "message", fmt.Errorf("error message"))
 	if !bytes.Contains(buf.Bytes(), []byte(`"stacktrace":"`)) {
 		t.Fatalf("logger stacktrace not works, buf contains: %s", buf.Bytes())
 	}
@ -163,11 +99,6 @@ func TestFromContextWithFields(t *testing.T) {
 	if !bytes.Contains(buf.Bytes(), []byte(`"key":"val"`)) {
 		t.Fatalf("logger fields not works, buf contains: %s", buf.Bytes())
 	}
-
-	l.Info(ctx, "test", "uncorrected number attributes")
-	if !bytes.Contains(buf.Bytes(), []byte(`"!BADKEY":"uncorrected number attributes"`)) {
-		t.Fatalf("logger fields not works, buf contains: %s", buf.Bytes())
-	}
 }

 func TestClone(t *testing.T) {
@ -243,52 +174,3 @@ func TestLogger(t *testing.T) {
 		t.Fatalf("logger warn, buf %s", buf.Bytes())
 	}
 }
-
-func Test_WithContextAttrFunc(t *testing.T) {
-	loggerContextAttrFuncs := []logger.ContextAttrFunc{
-		func(ctx context.Context) []interface{} {
-			md, ok := metadata.FromIncomingContext(ctx)
-			if !ok {
-				return nil
-			}
-			attrs := make([]interface{}, 0, 10)
-			for k, v := range md {
-				switch k {
-				case "X-Request-Id", "Phone", "External-Id", "Source-Service", "X-App-Install-Id", "Client-Id", "Client-Ip":
-					attrs = append(attrs, strings.ToLower(k), v)
-				}
-			}
-			return attrs
-		},
-	}
-
-	logger.DefaultContextAttrFuncs = append(logger.DefaultContextAttrFuncs, loggerContextAttrFuncs...)
-
-	ctx := context.TODO()
-	ctx = metadata.AppendIncomingContext(ctx, "X-Request-Id", uuid.New().String(),
-		"Source-Service", "Test-System")
-
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	l.Info(ctx, "test message")
-	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"info"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"test message"`))) {
-		t.Fatalf("logger info, buf %s", buf.Bytes())
-	}
-	if !(bytes.Contains(buf.Bytes(), []byte(`"x-request-id":"`))) {
-		t.Fatalf("logger info, buf %s", buf.Bytes())
-	}
-	if !(bytes.Contains(buf.Bytes(), []byte(`"source-service":"Test-System"`))) {
-		t.Fatalf("logger info, buf %s", buf.Bytes())
-	}
-	buf.Reset()
-	imd, _ := metadata.FromIncomingContext(ctx)
-	l.Info(ctx, "test message1")
-	imd.Set("Source-Service", "Test-System2")
-	l.Info(ctx, "test message2")
-
-	// t.Logf("xxx %s", buf.Bytes())
-}
--- a/logger/wrapper/wrapper.go
+++ b/logger/wrapper/wrapper.go
@ -0,0 +1,399 @@
+// Package wrapper provides wrapper for Logger
+package wrapper
+
+import (
+	"context"
+	"fmt"
+
+	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v3/server"
+)
+
+var (
+	// DefaultClientCallObserver called by wrapper in client Call
+	DefaultClientCallObserver = func(ctx context.Context, req client.Request, rsp interface{}, opts []client.CallOption, err error) []string {
+		labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
+		if err != nil {
+			labels = append(labels, "error", err.Error())
+		}
+		return labels
+	}
+
+	// DefaultClientStreamObserver called by wrapper in client Stream
+	DefaultClientStreamObserver = func(ctx context.Context, req client.Request, opts []client.CallOption, stream client.Stream, err error) []string {
+		labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
+		if err != nil {
+			labels = append(labels, "error", err.Error())
+		}
+		return labels
+	}
+
+	// DefaultClientPublishObserver called by wrapper in client Publish
+	DefaultClientPublishObserver = func(ctx context.Context, msg client.Message, opts []client.PublishOption, err error) []string {
+		labels := []string{"endpoint", msg.Topic()}
+		if err != nil {
+			labels = append(labels, "error", err.Error())
+		}
+		return labels
+	}
+
+	// DefaultServerHandlerObserver called by wrapper in server Handler
+	DefaultServerHandlerObserver = func(ctx context.Context, req server.Request, rsp interface{}, err error) []string {
+		labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
+		if err != nil {
+			labels = append(labels, "error", err.Error())
+		}
+		return labels
+	}
+
+	// DefaultServerSubscriberObserver called by wrapper in server Subscriber
+	DefaultServerSubscriberObserver = func(ctx context.Context, msg server.Message, err error) []string {
+		labels := []string{"endpoint", msg.Topic()}
+		if err != nil {
+			labels = append(labels, "error", err.Error())
+		}
+		return labels
+	}
+
+	// DefaultClientCallFuncObserver called by wrapper in client CallFunc
+	DefaultClientCallFuncObserver = func(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions, err error) []string {
+		labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
+		if err != nil {
+			labels = append(labels, "error", err.Error())
+		}
+		return labels
+	}
+
+	// DefaultSkipEndpoints wrapper not called for this endpoints
+	DefaultSkipEndpoints = []string{"Meter.Metrics", "Health.Live", "Health.Ready", "Health.Version"}
+)
+
+type lWrapper struct {
+	client.Client
+	serverHandler    server.HandlerFunc
+	serverSubscriber server.SubscriberFunc
+	clientCallFunc   client.CallFunc
+	opts             Options
+}
+
+type (
+	// ClientCallObserver func signature
+	ClientCallObserver func(context.Context, client.Request, interface{}, []client.CallOption, error) []string
+	// ClientStreamObserver func signature
+	ClientStreamObserver func(context.Context, client.Request, []client.CallOption, client.Stream, error) []string
+	// ClientPublishObserver func signature
+	ClientPublishObserver func(context.Context, client.Message, []client.PublishOption, error) []string
+	// ClientCallFuncObserver func signature
+	ClientCallFuncObserver func(context.Context, string, client.Request, interface{}, client.CallOptions, error) []string
+	// ServerHandlerObserver func signature
+	ServerHandlerObserver func(context.Context, server.Request, interface{}, error) []string
+	// ServerSubscriberObserver func signature
+	ServerSubscriberObserver func(context.Context, server.Message, error) []string
+)
+
+// Options struct for wrapper
+type Options struct {
+	// Logger that used for log
+	Logger logger.Logger
+	// ServerHandlerObservers funcs
+	ServerHandlerObservers []ServerHandlerObserver
+	// ServerSubscriberObservers funcs
+	ServerSubscriberObservers []ServerSubscriberObserver
+	// ClientCallObservers funcs
+	ClientCallObservers []ClientCallObserver
+	// ClientStreamObservers funcs
+	ClientStreamObservers []ClientStreamObserver
+	// ClientPublishObservers funcs
+	ClientPublishObservers []ClientPublishObserver
+	// ClientCallFuncObservers funcs
+	ClientCallFuncObservers []ClientCallFuncObserver
+	// SkipEndpoints
+	SkipEndpoints []string
+	// Level for logger
+	Level logger.Level
+	// Enabled flag
+	Enabled bool
+}
+
+// Option func signature
+type Option func(*Options)
+
+// NewOptions creates Options from Option slice
+func NewOptions(opts ...Option) Options {
+	options := Options{
+		Logger:                    logger.DefaultLogger,
+		Level:                     logger.TraceLevel,
+		ClientCallObservers:       []ClientCallObserver{DefaultClientCallObserver},
+		ClientStreamObservers:     []ClientStreamObserver{DefaultClientStreamObserver},
+		ClientPublishObservers:    []ClientPublishObserver{DefaultClientPublishObserver},
+		ClientCallFuncObservers:   []ClientCallFuncObserver{DefaultClientCallFuncObserver},
+		ServerHandlerObservers:    []ServerHandlerObserver{DefaultServerHandlerObserver},
+		ServerSubscriberObservers: []ServerSubscriberObserver{DefaultServerSubscriberObserver},
+		SkipEndpoints:             DefaultSkipEndpoints,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	return options
+}
+
+// WithEnabled enable/diable flag
+func WithEnabled(b bool) Option {
+	return func(o *Options) {
+		o.Enabled = b
+	}
+}
+
+// WithLevel log level
+func WithLevel(l logger.Level) Option {
+	return func(o *Options) {
+		o.Level = l
+	}
+}
+
+// WithLogger logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
+// WithClientCallObservers funcs
+func WithClientCallObservers(ob ...ClientCallObserver) Option {
+	return func(o *Options) {
+		o.ClientCallObservers = ob
+	}
+}
+
+// WithClientStreamObservers funcs
+func WithClientStreamObservers(ob ...ClientStreamObserver) Option {
+	return func(o *Options) {
+		o.ClientStreamObservers = ob
+	}
+}
+
+// WithClientPublishObservers funcs
+func WithClientPublishObservers(ob ...ClientPublishObserver) Option {
+	return func(o *Options) {
+		o.ClientPublishObservers = ob
+	}
+}
+
+// WithClientCallFuncObservers funcs
+func WithClientCallFuncObservers(ob ...ClientCallFuncObserver) Option {
+	return func(o *Options) {
+		o.ClientCallFuncObservers = ob
+	}
+}
+
+// WithServerHandlerObservers funcs
+func WithServerHandlerObservers(ob ...ServerHandlerObserver) Option {
+	return func(o *Options) {
+		o.ServerHandlerObservers = ob
+	}
+}
+
+// WithServerSubscriberObservers funcs
+func WithServerSubscriberObservers(ob ...ServerSubscriberObserver) Option {
+	return func(o *Options) {
+		o.ServerSubscriberObservers = ob
+	}
+}
+
+// SkipEndpoins
+func SkipEndpoints(eps ...string) Option {
+	return func(o *Options) {
+		o.SkipEndpoints = append(o.SkipEndpoints, eps...)
+	}
+}
+
+func (l *lWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
+	err := l.Client.Call(ctx, req, rsp, opts...)
+
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range l.opts.SkipEndpoints {
+		if ep == endpoint {
+			return err
+		}
+	}
+
+	if !l.opts.Enabled {
+		return err
+	}
+
+	var labels []string
+	for _, o := range l.opts.ClientCallObservers {
+		labels = append(labels, o(ctx, req, rsp, opts, err)...)
+	}
+	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
+
+	return err
+}
+
+func (l *lWrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
+	stream, err := l.Client.Stream(ctx, req, opts...)
+
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range l.opts.SkipEndpoints {
+		if ep == endpoint {
+			return stream, err
+		}
+	}
+
+	if !l.opts.Enabled {
+		return stream, err
+	}
+
+	var labels []string
+	for _, o := range l.opts.ClientStreamObservers {
+		labels = append(labels, o(ctx, req, opts, stream, err)...)
+	}
+	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
+
+	return stream, err
+}
+
+func (l *lWrapper) Publish(ctx context.Context, msg client.Message, opts ...client.PublishOption) error {
+	err := l.Client.Publish(ctx, msg, opts...)
+
+	endpoint := msg.Topic()
+	for _, ep := range l.opts.SkipEndpoints {
+		if ep == endpoint {
+			return err
+		}
+	}
+
+	if !l.opts.Enabled {
+		return err
+	}
+
+	var labels []string
+	for _, o := range l.opts.ClientPublishObservers {
+		labels = append(labels, o(ctx, msg, opts, err)...)
+	}
+	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
+
+	return err
+}
+
+func (l *lWrapper) ServerHandler(ctx context.Context, req server.Request, rsp interface{}) error {
+	err := l.serverHandler(ctx, req, rsp)
+
+	endpoint := req.Endpoint()
+	for _, ep := range l.opts.SkipEndpoints {
+		if ep == endpoint {
+			return err
+		}
+	}
+
+	if !l.opts.Enabled {
+		return err
+	}
+
+	var labels []string
+	for _, o := range l.opts.ServerHandlerObservers {
+		labels = append(labels, o(ctx, req, rsp, err)...)
+	}
+	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
+
+	return err
+}
+
+func (l *lWrapper) ServerSubscriber(ctx context.Context, msg server.Message) error {
+	err := l.serverSubscriber(ctx, msg)
+
+	endpoint := msg.Topic()
+	for _, ep := range l.opts.SkipEndpoints {
+		if ep == endpoint {
+			return err
+		}
+	}
+
+	if !l.opts.Enabled {
+		return err
+	}
+
+	var labels []string
+	for _, o := range l.opts.ServerSubscriberObservers {
+		labels = append(labels, o(ctx, msg, err)...)
+	}
+	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
+
+	return err
+}
+
+// NewClientWrapper accepts an open options and returns a Client Wrapper
+func NewClientWrapper(opts ...Option) client.Wrapper {
+	return func(c client.Client) client.Client {
+		options := NewOptions()
+		for _, o := range opts {
+			o(&options)
+		}
+		return &lWrapper{opts: options, Client: c}
+	}
+}
+
+// NewClientCallWrapper accepts an options and returns a Call Wrapper
+func NewClientCallWrapper(opts ...Option) client.CallWrapper {
+	return func(h client.CallFunc) client.CallFunc {
+		options := NewOptions()
+		for _, o := range opts {
+			o(&options)
+		}
+
+		l := &lWrapper{opts: options, clientCallFunc: h}
+		return l.ClientCallFunc
+	}
+}
+
+func (l *lWrapper) ClientCallFunc(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
+	err := l.clientCallFunc(ctx, addr, req, rsp, opts)
+
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range l.opts.SkipEndpoints {
+		if ep == endpoint {
+			return err
+		}
+	}
+
+	if !l.opts.Enabled {
+		return err
+	}
+
+	var labels []string
+	for _, o := range l.opts.ClientCallFuncObservers {
+		labels = append(labels, o(ctx, addr, req, rsp, opts, err)...)
+	}
+	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
+
+	return err
+}
+
+// NewServerHandlerWrapper accepts an options and returns a Handler Wrapper
+func NewServerHandlerWrapper(opts ...Option) server.HandlerWrapper {
+	return func(h server.HandlerFunc) server.HandlerFunc {
+		options := NewOptions()
+		for _, o := range opts {
+			o(&options)
+		}
+
+		l := &lWrapper{opts: options, serverHandler: h}
+		return l.ServerHandler
+	}
+}
+
+// NewServerSubscriberWrapper accepts an options and returns a Subscriber Wrapper
+func NewServerSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
+	return func(h server.SubscriberFunc) server.SubscriberFunc {
+		options := NewOptions()
+		for _, o := range opts {
+			o(&options)
+		}
+
+		l := &lWrapper{opts: options, serverSubscriber: h}
+		return l.ServerSubscriber
+	}
+}
--- a/metadata/metadata.go
+++ b/metadata/metadata.go
@ -1,5 +1,5 @@
 // Package metadata is a way of defining message headers
-package metadata
+package metadata // import "go.unistack.org/micro/v3/metadata"

 import (
 	"net/textproto"
--- a/meter/meter.go
+++ b/meter/meter.go
@ -16,19 +16,14 @@ var (
 	DefaultAddress = ":9090"
 	// DefaultPath the meter endpoint where the Meter data will be made available
 	DefaultPath = "/metrics"
-	// DefaultMeterStatsInterval specifies interval for meter updating
-	DefaultMeterStatsInterval = 5 * time.Second
+	// DefaultMetricPrefix holds the string that prepends to all metrics
+	DefaultMetricPrefix = "micro_"
+	// DefaultLabelPrefix holds the string that prepends to all labels
+	DefaultLabelPrefix = "micro_"
 	// DefaultSummaryQuantiles is the default spread of stats for summary
 	DefaultSummaryQuantiles = []float64{0.5, 0.9, 0.97, 0.99, 1}
 	// DefaultSummaryWindow is the default window for summary
 	DefaultSummaryWindow = 5 * time.Minute
-	// DefaultSkipEndpoints is the slice of endpoint that must not be metered
-	DefaultSkipEndpoints = []string{
-		"MeterService.Metrics",
-		"HealthService.Live",
-		"HealthService.Ready",
-		"HealthService.Version",
-	}
 )

 // Meter is an interface for collecting and instrumenting metrics
--- a/meter/options.go
+++ b/meter/options.go
@ -2,6 +2,8 @@ package meter

 import (
 	"context"
+
+	"go.unistack.org/micro/v3/logger"
 )

 // Option powers the configuration for metrics implementations:
@ -9,6 +11,8 @@ type Option func(*Options)

 // Options for metrics implementations
 type Options struct {
+	// Logger used for logging
+	Logger logger.Logger
 	// Context holds external options
 	Context context.Context
 	// Name holds the meter name
@ -17,6 +21,10 @@ type Options struct {
 	Address string
 	// Path holds the path for metrics
 	Path string
+	// MetricPrefix holds the prefix for all metrics
+	MetricPrefix string
+	// LabelPrefix holds the prefix for all labels
+	LabelPrefix string
 	// Labels holds the default labels
 	Labels []string
 	// WriteProcessMetrics flag to write process metrics
@ -31,6 +39,9 @@ func NewOptions(opt ...Option) Options {
 		Address:      DefaultAddress,
 		Path:         DefaultPath,
 		Context:      context.Background(),
+		Logger:       logger.DefaultLogger,
+		MetricPrefix: DefaultMetricPrefix,
+		LabelPrefix:  DefaultLabelPrefix,
 	}

 	for _, o := range opt {
@ -40,6 +51,20 @@ func NewOptions(opt ...Option) Options {
 	return opts
 }

+// LabelPrefix sets the labels prefix
+func LabelPrefix(pref string) Option {
+	return func(o *Options) {
+		o.LabelPrefix = pref
+	}
+}
+
+// MetricPrefix sets the metric prefix
+func MetricPrefix(pref string) Option {
+	return func(o *Options) {
+		o.MetricPrefix = pref
+	}
+}
+
 // Context sets the metrics context
 func Context(ctx context.Context) Option {
 	return func(o *Options) {
@ -70,7 +95,14 @@ func TimingObjectives(value map[float64]float64) Option {
 }
 */

-// Labels add the meter labels
+// Logger sets the logger
+func Logger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
+// Labels sets the meter labels
 func Labels(ls ...string) Option {
 	return func(o *Options) {
 		o.Labels = append(o.Labels, ls...)
--- a/meter/wrapper/wrapper.go
+++ b/meter/wrapper/wrapper.go
@ -0,0 +1,347 @@
+package wrapper // import "go.unistack.org/micro/v3/meter/wrapper"
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v3/meter"
+	"go.unistack.org/micro/v3/server"
+)
+
+var (
+	// ClientRequestDurationSeconds specifies meter metric name
+	ClientRequestDurationSeconds = "client_request_duration_seconds"
+	// ClientRequestLatencyMicroseconds specifies meter metric name
+	ClientRequestLatencyMicroseconds = "client_request_latency_microseconds"
+	// ClientRequestTotal specifies meter metric name
+	ClientRequestTotal = "client_request_total"
+	// ClientRequestInflight specifies meter metric name
+	ClientRequestInflight = "client_request_inflight"
+	// ServerRequestDurationSeconds specifies meter metric name
+	ServerRequestDurationSeconds = "server_request_duration_seconds"
+	// ServerRequestLatencyMicroseconds specifies meter metric name
+	ServerRequestLatencyMicroseconds = "server_request_latency_microseconds"
+	// ServerRequestTotal specifies meter metric name
+	ServerRequestTotal = "server_request_total"
+	// ServerRequestInflight specifies meter metric name
+	ServerRequestInflight = "server_request_inflight"
+	// PublishMessageDurationSeconds specifies meter metric name
+	PublishMessageDurationSeconds = "publish_message_duration_seconds"
+	// PublishMessageLatencyMicroseconds specifies meter metric name
+	PublishMessageLatencyMicroseconds = "publish_message_latency_microseconds"
+	// PublishMessageTotal specifies meter metric name
+	PublishMessageTotal = "publish_message_total"
+	// PublishMessageInflight specifies meter metric name
+	PublishMessageInflight = "publish_message_inflight"
+	// SubscribeMessageDurationSeconds specifies meter metric name
+	SubscribeMessageDurationSeconds = "subscribe_message_duration_seconds"
+	// SubscribeMessageLatencyMicroseconds specifies meter metric name
+	SubscribeMessageLatencyMicroseconds = "subscribe_message_latency_microseconds"
+	// SubscribeMessageTotal specifies meter metric name
+	SubscribeMessageTotal = "subscribe_message_total"
+	// SubscribeMessageInflight specifies meter metric name
+	SubscribeMessageInflight = "subscribe_message_inflight"
+
+	labelSuccess  = "success"
+	labelFailure  = "failure"
+	labelStatus   = "status"
+	labelEndpoint = "endpoint"
+
+	// DefaultSkipEndpoints contains list of endpoints that not evaluted by wrapper
+	DefaultSkipEndpoints = []string{"Meter.Metrics", "Health.Live", "Health.Ready", "Health.Version"}
+)
+
+// Options struct
+type Options struct {
+	Meter         meter.Meter
+	lopts         []meter.Option
+	SkipEndpoints []string
+}
+
+// Option func signature
+type Option func(*Options)
+
+// NewOptions creates new Options struct
+func NewOptions(opts ...Option) Options {
+	options := Options{
+		Meter:         meter.DefaultMeter,
+		lopts:         make([]meter.Option, 0, 5),
+		SkipEndpoints: DefaultSkipEndpoints,
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+	return options
+}
+
+// ServiceName passes service name to meter label
+func ServiceName(name string) Option {
+	return func(o *Options) {
+		o.lopts = append(o.lopts, meter.Labels("name", name))
+	}
+}
+
+// ServiceVersion passes service version to meter label
+func ServiceVersion(version string) Option {
+	return func(o *Options) {
+		o.lopts = append(o.lopts, meter.Labels("version", version))
+	}
+}
+
+// ServiceID passes service id to meter label
+func ServiceID(id string) Option {
+	return func(o *Options) {
+		o.lopts = append(o.lopts, meter.Labels("id", id))
+	}
+}
+
+// Meter passes meter
+func Meter(m meter.Meter) Option {
+	return func(o *Options) {
+		o.Meter = m
+	}
+}
+
+// SkipEndoints add endpoint to skip
+func SkipEndoints(eps ...string) Option {
+	return func(o *Options) {
+		o.SkipEndpoints = append(o.SkipEndpoints, eps...)
+	}
+}
+
+type wrapper struct {
+	client.Client
+	callFunc client.CallFunc
+	opts     Options
+}
+
+// NewClientWrapper create new client wrapper
+func NewClientWrapper(opts ...Option) client.Wrapper {
+	return func(c client.Client) client.Client {
+		handler := &wrapper{
+			opts:   NewOptions(opts...),
+			Client: c,
+		}
+		return handler
+	}
+}
+
+// NewCallWrapper create new call wrapper
+func NewCallWrapper(opts ...Option) client.CallWrapper {
+	return func(fn client.CallFunc) client.CallFunc {
+		handler := &wrapper{
+			opts:     NewOptions(opts...),
+			callFunc: fn,
+		}
+		return handler.CallFunc
+	}
+}
+
+func (w *wrapper) CallFunc(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range w.opts.SkipEndpoints {
+		if ep == endpoint {
+			return w.callFunc(ctx, addr, req, rsp, opts)
+		}
+	}
+
+	labels := make([]string, 0, 4)
+	labels = append(labels, labelEndpoint, endpoint)
+
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Inc()
+	ts := time.Now()
+	err := w.callFunc(ctx, addr, req, rsp, opts)
+	te := time.Since(ts)
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Dec()
+
+	w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
+	w.opts.Meter.Histogram(ClientRequestDurationSeconds, labels...).Update(te.Seconds())
+
+	if err == nil {
+		labels = append(labels, labelStatus, labelSuccess)
+	} else {
+		labels = append(labels, labelStatus, labelFailure)
+	}
+	w.opts.Meter.Counter(ClientRequestTotal, labels...).Inc()
+
+	return err
+}
+
+func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range w.opts.SkipEndpoints {
+		if ep == endpoint {
+			return w.Client.Call(ctx, req, rsp, opts...)
+		}
+	}
+
+	labels := make([]string, 0, 4)
+	labels = append(labels, labelEndpoint, endpoint)
+
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Inc()
+	ts := time.Now()
+	err := w.Client.Call(ctx, req, rsp, opts...)
+	te := time.Since(ts)
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Dec()
+
+	w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
+	w.opts.Meter.Histogram(ClientRequestDurationSeconds, labels...).Update(te.Seconds())
+
+	if err == nil {
+		labels = append(labels, labelStatus, labelSuccess)
+	} else {
+		labels = append(labels, labelStatus, labelFailure)
+	}
+	w.opts.Meter.Counter(ClientRequestTotal, labels...).Inc()
+
+	return err
+}
+
+func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range w.opts.SkipEndpoints {
+		if ep == endpoint {
+			return w.Client.Stream(ctx, req, opts...)
+		}
+	}
+
+	labels := make([]string, 0, 4)
+	labels = append(labels, labelEndpoint, endpoint)
+
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Inc()
+	ts := time.Now()
+	stream, err := w.Client.Stream(ctx, req, opts...)
+	te := time.Since(ts)
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Dec()
+
+	w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
+	w.opts.Meter.Histogram(ClientRequestDurationSeconds, labels...).Update(te.Seconds())
+
+	if err == nil {
+		labels = append(labels, labelStatus, labelSuccess)
+	} else {
+		labels = append(labels, labelStatus, labelFailure)
+	}
+	w.opts.Meter.Counter(ClientRequestTotal, labels...).Inc()
+
+	return stream, err
+}
+
+func (w *wrapper) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
+	endpoint := p.Topic()
+
+	labels := make([]string, 0, 4)
+	labels = append(labels, labelEndpoint, endpoint)
+
+	w.opts.Meter.Counter(PublishMessageInflight, labels...).Inc()
+	ts := time.Now()
+	err := w.Client.Publish(ctx, p, opts...)
+	te := time.Since(ts)
+	w.opts.Meter.Counter(PublishMessageInflight, labels...).Dec()
+
+	w.opts.Meter.Summary(PublishMessageLatencyMicroseconds, labels...).Update(te.Seconds())
+	w.opts.Meter.Histogram(PublishMessageDurationSeconds, labels...).Update(te.Seconds())
+
+	if err == nil {
+		labels = append(labels, labelStatus, labelSuccess)
+	} else {
+		labels = append(labels, labelStatus, labelFailure)
+	}
+	w.opts.Meter.Counter(PublishMessageTotal, labels...).Inc()
+
+	return err
+}
+
+// NewHandlerWrapper create new server handler wrapper
+// deprecated
+func NewHandlerWrapper(opts ...Option) server.HandlerWrapper {
+	handler := &wrapper{
+		opts: NewOptions(opts...),
+	}
+	return handler.HandlerFunc
+}
+
+// NewServerHandlerWrapper create new server handler wrapper
+func NewServerHandlerWrapper(opts ...Option) server.HandlerWrapper {
+	handler := &wrapper{
+		opts: NewOptions(opts...),
+	}
+	return handler.HandlerFunc
+}
+
+func (w *wrapper) HandlerFunc(fn server.HandlerFunc) server.HandlerFunc {
+	return func(ctx context.Context, req server.Request, rsp interface{}) error {
+		endpoint := req.Service() + "." + req.Endpoint()
+		for _, ep := range w.opts.SkipEndpoints {
+			if ep == endpoint {
+				return fn(ctx, req, rsp)
+			}
+		}
+
+		labels := make([]string, 0, 4)
+		labels = append(labels, labelEndpoint, endpoint)
+
+		w.opts.Meter.Counter(ServerRequestInflight, labels...).Inc()
+		ts := time.Now()
+		err := fn(ctx, req, rsp)
+		te := time.Since(ts)
+		w.opts.Meter.Counter(ServerRequestInflight, labels...).Dec()
+
+		w.opts.Meter.Summary(ServerRequestLatencyMicroseconds, labels...).Update(te.Seconds())
+		w.opts.Meter.Histogram(ServerRequestDurationSeconds, labels...).Update(te.Seconds())
+
+		if err == nil {
+			labels = append(labels, labelStatus, labelSuccess)
+		} else {
+			labels = append(labels, labelStatus, labelFailure)
+		}
+		w.opts.Meter.Counter(ServerRequestTotal, labels...).Inc()
+
+		return err
+	}
+}
+
+// NewSubscriberWrapper create server subscribe wrapper
+// deprecated
+func NewSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
+	handler := &wrapper{
+		opts: NewOptions(opts...),
+	}
+	return handler.SubscriberFunc
+}
+
+func NewServerSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
+	handler := &wrapper{
+		opts: NewOptions(opts...),
+	}
+	return handler.SubscriberFunc
+}
+
+func (w *wrapper) SubscriberFunc(fn server.SubscriberFunc) server.SubscriberFunc {
+	return func(ctx context.Context, msg server.Message) error {
+		endpoint := msg.Topic()
+
+		labels := make([]string, 0, 4)
+		labels = append(labels, labelEndpoint, endpoint)
+
+		w.opts.Meter.Counter(SubscribeMessageInflight, labels...).Inc()
+		ts := time.Now()
+		err := fn(ctx, msg)
+		te := time.Since(ts)
+		w.opts.Meter.Counter(SubscribeMessageInflight, labels...).Dec()
+
+		w.opts.Meter.Summary(SubscribeMessageLatencyMicroseconds, labels...).Update(te.Seconds())
+		w.opts.Meter.Histogram(SubscribeMessageDurationSeconds, labels...).Update(te.Seconds())
+
+		if err == nil {
+			labels = append(labels, labelStatus, labelSuccess)
+		} else {
+			labels = append(labels, labelStatus, labelFailure)
+		}
+		w.opts.Meter.Counter(SubscribeMessageTotal, labels...).Inc()
+
+		return err
+	}
+}
--- a/mtls/mtls.go
+++ b/mtls/mtls.go
@ -1,4 +1,4 @@
-package mtls
+package mtls // import "go.unistack.org/micro/v3/mtls"

 import (
 	"bytes"
--- a/network/network.go
+++ b/network/network.go
@ -1,5 +1,5 @@
 // Package network is for creating internetworks
-package network
+package network // import "go.unistack.org/micro/v3/network"

 import (
 	"go.unistack.org/micro/v3/client"
--- a/network/transport/transport.go
+++ b/network/transport/transport.go
@ -1,5 +1,5 @@
 // Package transport is an interface for synchronous connection based communication
-package transport
+package transport // import "go.unistack.org/micro/v3/network/transport"

 import (
 	"context"
--- a/network/tunnel/broker/broker.go
+++ b/network/tunnel/broker/broker.go
@ -1,5 +1,5 @@
 // Package broker is a tunnel broker
-package broker
+package broker // import "go.unistack.org/micro/v3/network/tunnel/broker"

 import (
 	"context"
@ -177,12 +177,12 @@ func (t *tunBatchSubscriber) run() {
 		// receive message
 		m := new(transport.Message)
 		if err := c.Recv(m); err != nil {
-			if logger.DefaultLogger.V(logger.ErrorLevel) {
-				logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
+			if logger.V(logger.ErrorLevel) {
+				logger.Error(t.opts.Context, err.Error())
 			}
 			if err = c.Close(); err != nil {
-				if logger.DefaultLogger.V(logger.ErrorLevel) {
-					logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
+				if logger.V(logger.ErrorLevel) {
+					logger.Error(t.opts.Context, err.Error())
 				}
 			}
 			continue
@ -222,12 +222,12 @@ func (t *tunSubscriber) run() {
 		// receive message
 		m := new(transport.Message)
 		if err := c.Recv(m); err != nil {
-			if logger.DefaultLogger.V(logger.ErrorLevel) {
-				logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
+			if logger.V(logger.ErrorLevel) {
+				logger.Error(t.opts.Context, err.Error())
 			}
 			if err = c.Close(); err != nil {
-				if logger.DefaultLogger.V(logger.ErrorLevel) {
-					logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
+				if logger.V(logger.ErrorLevel) {
+					logger.Error(t.opts.Context, err.Error())
 				}
 			}
 			continue
@ -305,10 +305,6 @@ func (t *tunEvent) SetError(err error) {
 	t.err = err
 }

-func (t *tunEvent) Context() context.Context {
-	return context.TODO()
-}
-
 // NewBroker returns new tunnel broker
 func NewBroker(opts ...broker.Option) (broker.Broker, error) {
 	options := broker.NewOptions(opts...)
--- a/network/tunnel/transport/transport.go
+++ b/network/tunnel/transport/transport.go
@ -1,5 +1,5 @@
 // Package transport provides a tunnel transport
-package transport
+package transport // import "go.unistack.org/micro/v3/network/tunnel/transport"

 import (
 	"context"
--- a/network/tunnel/tunnel.go
+++ b/network/tunnel/tunnel.go
@ -1,5 +1,5 @@
 // Package tunnel provides gre network tunnelling
-package tunnel
+package tunnel // import "go.unistack.org/micro/v3/network/transport/tunnel"

 import (
 	"context"
--- a/options.go
+++ b/options.go
@ -269,7 +269,15 @@ func Logger(l logger.Logger, opts ...LoggerOption) Option {
 				}
 			}
 		}
-		
+		for _, mtr := range o.Meters {
+			for _, or := range lopts.meters {
+				if mtr.Name() == or || all {
+					if err = mtr.Init(meter.Logger(l)); err != nil {
+						return err
+					}
+				}
+			}
+		}
 		for _, trc := range o.Tracers {
 			for _, ot := range lopts.tracers {
 				if trc.Name() == ot || all {
--- a/profiler/http/http.go
+++ b/profiler/http/http.go
@ -1,5 +1,5 @@
 // Package http enables the http profiler
-package http
+package http // import "go.unistack.org/micro/v3/profiler/http"

 import (
 	"context"
--- a/profiler/pprof/pprof.go
+++ b/profiler/pprof/pprof.go
@ -1,5 +1,5 @@
 // Package pprof provides a pprof profiler which writes output to /tmp/[name].{cpu,mem}.pprof
-package pprof
+package pprof // import "go.unistack.org/micro/v3/profiler/pprof"

 import (
 	"os"
--- a/profiler/profile.go
+++ b/profiler/profile.go
@ -1,5 +1,5 @@
 // Package profiler is for profilers
-package profiler
+package profiler // import "go.unistack.org/micro/v3/profiler"

 // Profiler interface
 type Profiler interface {
--- a/proxy/proxy.go
+++ b/proxy/proxy.go
@ -1,5 +1,5 @@
 // Package proxy is a transparent proxy built on the micro/server
-package proxy
+package proxy // import "go.unistack.org/micro/v3/proxy"

 import (
 	"context"
--- a/register/memory/memory.go
+++ b/register/memory/memory.go
@ -2,7 +2,6 @@ package register

 import (
 	"context"
-	"fmt"
 	"sync"
 	"time"

@ -65,7 +64,7 @@ func (m *memory) ttlPrune() {
 					for id, n := range record.Nodes {
 						if n.TTL != 0 && time.Since(n.LastSeen) > n.TTL {
 							if m.opts.Logger.V(logger.DebugLevel) {
-								m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Register TTL expired for node %s of service %s", n.ID, service))
+								m.opts.Logger.Debugf(m.opts.Context, "Register TTL expired for node %s of service %s", n.ID, service)
 							}
 							delete(m.records[domain][service][version].Nodes, id)
 						}
@ -152,7 +151,7 @@ func (m *memory) Register(ctx context.Context, s *register.Service, opts ...regi
 	if _, ok := srvs[s.Name][s.Version]; !ok {
 		srvs[s.Name][s.Version] = r
 		if m.opts.Logger.V(logger.DebugLevel) {
-			m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Register added new service: %s, version: %s", s.Name, s.Version))
+			m.opts.Logger.Debugf(m.opts.Context, "Register added new service: %s, version: %s", s.Name, s.Version)
 		}
 		m.records[options.Domain] = srvs
 		go m.sendEvent(&register.Result{Action: "create", Service: s})
@ -192,14 +191,14 @@ func (m *memory) Register(ctx context.Context, s *register.Service, opts ...regi

 	if addedNodes {
 		if m.opts.Logger.V(logger.DebugLevel) {
-			m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Register added new node to service: %s, version: %s", s.Name, s.Version))
+			m.opts.Logger.Debugf(m.opts.Context, "Register added new node to service: %s, version: %s", s.Name, s.Version)
 		}
 		go m.sendEvent(&register.Result{Action: "update", Service: s})
 	} else {
 		// refresh TTL and timestamp
 		for _, n := range s.Nodes {
 			if m.opts.Logger.V(logger.DebugLevel) {
-				m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Updated registration for service: %s, version: %s", s.Name, s.Version))
+				m.opts.Logger.Debugf(m.opts.Context, "Updated registration for service: %s, version: %s", s.Name, s.Version)
 			}
 			srvs[s.Name][s.Version].Nodes[n.ID].TTL = options.TTL
 			srvs[s.Name][s.Version].Nodes[n.ID].LastSeen = time.Now()
@ -244,7 +243,7 @@ func (m *memory) Deregister(ctx context.Context, s *register.Service, opts ...re
 	for _, n := range s.Nodes {
 		if _, ok := version.Nodes[n.ID]; ok {
 			if m.opts.Logger.V(logger.DebugLevel) {
-				m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Register removed node from service: %s, version: %s", s.Name, s.Version))
+				m.opts.Logger.Debugf(m.opts.Context, "Register removed node from service: %s, version: %s", s.Name, s.Version)
 			}
 			delete(version.Nodes, n.ID)
 		}
@ -265,7 +264,7 @@ func (m *memory) Deregister(ctx context.Context, s *register.Service, opts ...re
 		go m.sendEvent(&register.Result{Action: "delete", Service: s})

 		if m.opts.Logger.V(logger.DebugLevel) {
-			m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Register removed service: %s", s.Name))
+			m.opts.Logger.Debugf(m.opts.Context, "Register removed service: %s", s.Name)
 		}
 		return nil
 	}
@ -274,7 +273,7 @@ func (m *memory) Deregister(ctx context.Context, s *register.Service, opts ...re
 	delete(m.records[options.Domain][s.Name], s.Version)
 	go m.sendEvent(&register.Result{Action: "delete", Service: s})
 	if m.opts.Logger.V(logger.DebugLevel) {
-		m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Register removed service: %s, version: %s", s.Name, s.Version))
+		m.opts.Logger.Debugf(m.opts.Context, "Register removed service: %s, version: %s", s.Name, s.Version)
 	}

 	return nil
--- a/register/register.go
+++ b/register/register.go
@ -1,5 +1,5 @@
 // Package register is an interface for service discovery
-package register
+package register // import "go.unistack.org/micro/v3/register"

 import (
 	"context"
--- a/resolver/dns/dns.go
+++ b/resolver/dns/dns.go
@ -1,5 +1,5 @@
 // Package dns resolves names to dns records
-package dns
+package dns // import "go.unistack.org/micro/v3/resolver/dns"

 import (
 	"context"
--- a/resolver/dnssrv/dnssrv.go
+++ b/resolver/dnssrv/dnssrv.go
@ -1,5 +1,5 @@
 // Package dnssrv resolves names to dns srv records
-package dnssrv
+package dnssrv // import "go.unistack.org/micro/v3/resolver/dnssrv"

 import (
 	"fmt"
--- a/resolver/http/http.go
+++ b/resolver/http/http.go
@ -1,5 +1,5 @@
 // Package http resolves names to network addresses using a http request
-package http
+package http // import "go.unistack.org/micro/v3/resolver/http"

 import (
 	"encoding/json"
--- a/resolver/noop/noop.go
+++ b/resolver/noop/noop.go
@ -1,5 +1,5 @@
 // Package noop is a noop resolver
-package noop
+package noop // import "go.unistack.org/micro/v3/resolver/noop"

 import (
 	"go.unistack.org/micro/v3/resolver"
--- a/resolver/registry/registry.go
+++ b/resolver/registry/registry.go
@ -1,5 +1,5 @@
 // Package register resolves names using the micro register
-package register
+package register // import "go.unistack.org/micro/v3/resolver/registry"

 import (
 	"context"
--- a/resolver/static/static.go
+++ b/resolver/static/static.go
@ -1,5 +1,5 @@
 // Package static is a static resolver
-package static
+package static // import "go.unistack.org/micro/v3/resolver/static"

 import (
 	"go.unistack.org/micro/v3/resolver"
--- a/router/router.go
+++ b/router/router.go
@ -1,5 +1,5 @@
 // Package router provides a network routing control plane
-package router
+package router // import "go.unistack.org/micro/v3/router"

 import (
 	"errors"
--- a/selector/random/random.go
+++ b/selector/random/random.go
@ -1,4 +1,4 @@
-package random
+package random // import "go.unistack.org/micro/v3/selector/random"

 import (
 	"go.unistack.org/micro/v3/selector"
--- a/selector/roundrobin/roundrobin.go
+++ b/selector/roundrobin/roundrobin.go
@ -1,4 +1,4 @@
-package roundrobin
+package roundrobin // import "go.unistack.org/micro/v3/selector/roundrobin"

 import (
 	"go.unistack.org/micro/v3/selector"
--- a/selector/selector.go
+++ b/selector/selector.go
@ -1,5 +1,5 @@
 // Package selector is for node selection and load balancing
-package selector
+package selector // import "go.unistack.org/micro/v3/selector"

 import (
 	"errors"
--- a/semconv/broker.go
+++ b/semconv/broker.go
@ -2,21 +2,21 @@ package semconv

 var (
 	// PublishMessageDurationSeconds specifies meter metric name
-	PublishMessageDurationSeconds = "micro_publish_message_duration_seconds"
+	PublishMessageDurationSeconds = "publish_message_duration_seconds"
 	// PublishMessageLatencyMicroseconds specifies meter metric name
-	PublishMessageLatencyMicroseconds = "micro_publish_message_latency_microseconds"
+	PublishMessageLatencyMicroseconds = "publish_message_latency_microseconds"
 	// PublishMessageTotal specifies meter metric name
-	PublishMessageTotal = "micro_publish_message_total"
+	PublishMessageTotal = "publish_message_total"
 	// PublishMessageInflight specifies meter metric name
-	PublishMessageInflight = "micro_publish_message_inflight"
+	PublishMessageInflight = "publish_message_inflight"
 	// SubscribeMessageDurationSeconds specifies meter metric name
-	SubscribeMessageDurationSeconds = "micro_subscribe_message_duration_seconds"
+	SubscribeMessageDurationSeconds = "subscribe_message_duration_seconds"
 	// SubscribeMessageLatencyMicroseconds specifies meter metric name
-	SubscribeMessageLatencyMicroseconds = "micro_subscribe_message_latency_microseconds"
+	SubscribeMessageLatencyMicroseconds = "subscribe_message_latency_microseconds"
 	// SubscribeMessageTotal specifies meter metric name
-	SubscribeMessageTotal = "micro_subscribe_message_total"
+	SubscribeMessageTotal = "subscribe_message_total"
 	// SubscribeMessageInflight specifies meter metric name
-	SubscribeMessageInflight = "micro_subscribe_message_inflight"
+	SubscribeMessageInflight = "subscribe_message_inflight"
 	// BrokerGroupLag specifies broker lag
-	BrokerGroupLag = "micro_broker_group_lag"
+	BrokerGroupLag = "broker_group_lag"
 )
--- a/semconv/cache.go
+++ b/semconv/cache.go
@ -0,0 +1,12 @@
+package semconv
+
+var (
+	// CacheRequestDurationSeconds specifies meter metric name
+	CacheRequestDurationSeconds = "cache_request_duration_seconds"
+	// ClientRequestLatencyMicroseconds specifies meter metric name
+	CacheRequestLatencyMicroseconds = "cache_request_latency_microseconds"
+	// CacheRequestTotal specifies meter metric name
+	CacheRequestTotal = "cache_request_total"
+	// CacheRequestInflight specifies meter metric name
+	CacheRequestInflight = "cache_request_inflight"
+)
--- a/semconv/client.go
+++ b/semconv/client.go
@ -2,11 +2,11 @@ package semconv

 var (
 	// ClientRequestDurationSeconds specifies meter metric name
-	ClientRequestDurationSeconds = "micro_client_request_duration_seconds"
+	ClientRequestDurationSeconds = "client_request_duration_seconds"
 	// ClientRequestLatencyMicroseconds specifies meter metric name
-	ClientRequestLatencyMicroseconds = "micro_client_request_latency_microseconds"
+	ClientRequestLatencyMicroseconds = "client_request_latency_microseconds"
 	// ClientRequestTotal specifies meter metric name
-	ClientRequestTotal = "micro_client_request_total"
+	ClientRequestTotal = "client_request_total"
 	// ClientRequestInflight specifies meter metric name
-	ClientRequestInflight = "micro_client_request_inflight"
+	ClientRequestInflight = "client_request_inflight"
 )
--- a/semconv/logger.go
+++ b/semconv/logger.go
@ -1,4 +0,0 @@
-package semconv
-
-// LoggerMessageTotal specifies meter metric name for logger messages
-var LoggerMessageTotal = "micro_logger_message_total"
--- a/semconv/pool.go
+++ b/semconv/pool.go
@ -1,12 +0,0 @@
-package semconv
-
-var (
-	// PoolGetTotal specifies meter metric name for total number of pool get ops
-	PoolGetTotal = "micro_pool_get_total"
-	// PoolPutTotal specifies meter metric name for total number of pool put ops
-	PoolPutTotal = "micro_pool_put_total"
-	// PoolMisTotal specifies meter metric name for total number of pool misses
-	PoolMisTotal = "micro_pool_mis_total"
-	// PoolRetTotal specifies meter metric name for total number of pool returned to gc
-	PoolRetTotal = "micro_pool_ret_total"
-)
--- a/semconv/server.go
+++ b/semconv/server.go
@ -2,11 +2,11 @@ package semconv

 var (
 	// ServerRequestDurationSeconds specifies meter metric name
-	ServerRequestDurationSeconds = "micro_server_request_duration_seconds"
+	ServerRequestDurationSeconds = "server_request_duration_seconds"
 	// ServerRequestLatencyMicroseconds specifies meter metric name
-	ServerRequestLatencyMicroseconds = "micro_server_request_latency_microseconds"
+	ServerRequestLatencyMicroseconds = "server_request_latency_microseconds"
 	// ServerRequestTotal specifies meter metric name
-	ServerRequestTotal = "micro_server_request_total"
+	ServerRequestTotal = "server_request_total"
 	// ServerRequestInflight specifies meter metric name
-	ServerRequestInflight = "micro_server_request_inflight"
+	ServerRequestInflight = "server_request_inflight"
 )
--- a/semconv/store.go
+++ b/semconv/store.go
@ -1,12 +0,0 @@
-package semconv
-
-var (
-	// StoreRequestDurationSeconds specifies meter metric name
-	StoreRequestDurationSeconds = "micro_store_request_duration_seconds"
-	// ClientRequestLatencyMicroseconds specifies meter metric name
-	StoreRequestLatencyMicroseconds = "micro_store_request_latency_microseconds"
-	// StoreRequestTotal specifies meter metric name
-	StoreRequestTotal = "micro_store_request_total"
-	// StoreRequestInflight specifies meter metric name
-	StoreRequestInflight = "micro_store_request_inflight"
-)
--- a/server/noop.go
+++ b/server/noop.go
@ -1,6 +1,7 @@
 package server

 import (
+	"bytes"
 	"context"
 	"fmt"
 	"reflect"
@ -459,7 +460,7 @@ func (n *noopServer) Start() error {
 					}
 				} else if rerr != nil && !registered {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Error(n.opts.Context, fmt.Sprintf("server %s-%s register check error", config.Name, config.ID), rerr)
+						config.Logger.Errorf(n.opts.Context, fmt.Sprintf("server %s-%s register check error", config.Name, config.ID), rerr)
 					}
 					continue
 				}
@ -690,7 +691,7 @@ func (n *noopServer) createSubHandler(sb *subscriber, opts Options) broker.Handl
 				req = req.Elem()
 			}

-			if err = cf.Unmarshal(msg.Body, req.Interface()); err != nil {
+			if err = cf.ReadBody(bytes.NewBuffer(msg.Body), req.Interface()); err != nil {
 				return err
 			}

--- a/server/server.go
+++ b/server/server.go
@ -1,5 +1,5 @@
 // Package server is an interface for a micro server
-package server
+package server // import "go.unistack.org/micro/v3/server"

 import (
 	"context"
@ -11,9 +11,7 @@ import (
 )

 // DefaultServer default server
-var (
-	DefaultServer Server = NewServer()
-)
+var DefaultServer Server = NewServer()

 var (
 	// DefaultAddress will be used if no address passed, use secure localhost
--- a/service.go
+++ b/service.go
@ -5,8 +5,6 @@ import (
 	"fmt"
 	"sync"

-	"github.com/KimMachineGun/automemlimit/memlimit"
-	"go.uber.org/automaxprocs/maxprocs"
 	"go.unistack.org/micro/v3/broker"
 	"go.unistack.org/micro/v3/client"
 	"go.unistack.org/micro/v3/config"
@ -19,19 +17,6 @@ import (
 	"go.unistack.org/micro/v3/tracer"
 )

-func init() {
-	maxprocs.Set()
-	memlimit.SetGoMemLimitWithOpts(
-		memlimit.WithRatio(0.9),
-		memlimit.WithProvider(
-			memlimit.ApplyFallback(
-				memlimit.FromCgroup,
-				memlimit.FromSystem,
-			),
-		),
-	)
-}
-
 // Service is an interface that wraps the lower level components.
 // Its works as container with building blocks for service.
 type Service interface {
@ -87,14 +72,13 @@ func RegisterSubscriber(topic string, s server.Server, h interface{}, opts ...se
 }

 type service struct {
-	done chan struct{}
 	opts Options
 	sync.RWMutex
 }

 // NewService creates and returns a new Service based on the packages within.
 func NewService(opts ...Option) Service {
-	return &service{opts: NewOptions(opts...), done: make(chan struct{})}
+	return &service{opts: NewOptions(opts...)}
 }

 func (s *service) Name() string {
@ -278,7 +262,7 @@ func (s *service) Start() error {
 	}

 	if config.Loggers[0].V(logger.InfoLevel) {
-		config.Loggers[0].Info(s.opts.Context, fmt.Sprintf("starting [service] %s version %s", s.Options().Name, s.Options().Version))
+		config.Loggers[0].Infof(s.opts.Context, "starting [service] %s version %s", s.Options().Name, s.Options().Version)
 	}

 	if len(s.opts.Servers) == 0 {
@ -324,7 +308,7 @@ func (s *service) Stop() error {
 	s.RUnlock()

 	if config.Loggers[0].V(logger.InfoLevel) {
-		config.Loggers[0].Info(s.opts.Context, fmt.Sprintf("stoppping [service] %s", s.Name()))
+		config.Loggers[0].Infof(s.opts.Context, "stoppping [service] %s", s.Name())
 	}

 	var err error
@ -364,8 +348,6 @@ func (s *service) Stop() error {
 		}
 	}

-	close(s.done)
-
 	return nil
 }

@ -389,7 +371,7 @@ func (s *service) Run() error {
 	}

 	// wait on context cancel
-	<-s.done
+	<-s.opts.Context.Done()

 	return s.Stop()
 }
--- a/service_test.go
+++ b/service_test.go
@ -134,7 +134,7 @@ func TestNewService(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			if got := NewService(tt.args.opts...); got.Name() != tt.want.Name() {
+			if got := NewService(tt.args.opts...); !reflect.DeepEqual(got, tt.want) {
 				t.Errorf("NewService() = %v, want %v", got.Options().Name, tt.want.Options().Name)
 			}
 		})
--- a/store/store.go
+++ b/store/store.go
@ -1,5 +1,5 @@
 // Package store is an interface for distributed data storage.
-package store
+package store // import "go.unistack.org/micro/v3/store"

 import (
 	"context"
@ -7,8 +7,6 @@ import (
 )

 var (
-	// ErrNotConnected is returned when a store is not connected
-	ErrNotConnected = errors.New("not conected")
 	// ErrNotFound is returned when a key doesn't exist
 	ErrNotFound = errors.New("not found")
 	// ErrInvalidKey is returned when a key has empty or have invalid format
--- a/sync/sync.go
+++ b/sync/sync.go
@ -1,5 +1,5 @@
 // Package sync is an interface for distributed synchronization
-package sync
+package sync // import "go.unistack.org/micro/v3/sync"

 import (
 	"errors"
--- a/tracer/memory/memory_test.go
+++ b/tracer/memory/memory_test.go
@ -17,14 +17,14 @@ func TestLoggerWithTracer(t *testing.T) {
 	buf := bytes.NewBuffer(nil)
 	logger.DefaultLogger = slog.NewLogger(logger.WithOutput(buf))

-	if err := logger.DefaultLogger.Init(); err != nil {
+	if err := logger.Init(); err != nil {
 		t.Fatal(err)
 	}
 	var span tracer.Span
 	tr := NewTracer()
 	ctx, span = tr.Start(ctx, "test1")

-	logger.DefaultLogger.Error(ctx, "my test error", fmt.Errorf("error"))
+	logger.Error(ctx, "my test error", fmt.Errorf("error"))

 	if !strings.Contains(buf.String(), span.TraceID()) {
 		t.Fatalf("log does not contains trace id: %s", buf.Bytes())
--- a/tracer/options.go
+++ b/tracer/options.go
@ -83,11 +83,8 @@ func (sk SpanKind) String() string {

 // SpanOptions contains span option
 type SpanOptions struct {
-	StatusMsg string
 	Labels []interface{}
-	Status    SpanStatus
 	Kind   SpanKind
-	Record    bool
 }

 // SpanOption func signature
@ -113,25 +110,12 @@ func WithSpanLabels(kv ...interface{}) SpanOption {
 	}
 }

-func WithSpanStatus(st SpanStatus, msg string) SpanOption {
-	return func(o *SpanOptions) {
-		o.Status = st
-		o.StatusMsg = msg
-	}
-}
-
 func WithSpanKind(k SpanKind) SpanOption {
 	return func(o *SpanOptions) {
 		o.Kind = k
 	}
 }

-func WithSpanRecord(b bool) SpanOption {
-	return func(o *SpanOptions) {
-		o.Record = b
-	}
-}
-
 // Options struct
 type Options struct {
 	// Context used to store custome tracer options
@ -140,8 +124,6 @@ type Options struct {
 	Logger logger.Logger
 	// Name of the tracer
 	Name string
-	// ContextAttrFuncs contains funcs that provides tracing
-	ContextAttrFuncs []ContextAttrFunc
 }

 // Option func signature
@ -167,7 +149,6 @@ func NewEventOptions(opts ...EventOption) EventOptions {
 func NewSpanOptions(opts ...SpanOption) SpanOptions {
 	options := SpanOptions{
 		Kind: SpanKindInternal,
-		Record: true,
 	}
 	for _, o := range opts {
 		o(&options)
@ -180,7 +161,6 @@ func NewOptions(opts ...Option) Options {
 	options := Options{
 		Logger:  logger.DefaultLogger,
 		Context: context.Background(),
-		ContextAttrFuncs: DefaultContextAttrFuncs,
 	}
 	for _, o := range opts {
 		o(&options)
--- a/tracer/tracer.go
+++ b/tracer/tracer.go
@ -1,5 +1,5 @@
 // Package tracer provides an interface for distributed tracing
-package tracer
+package tracer // import "go.unistack.org/micro/v3/tracer"

 import (
 	"context"
@ -7,25 +7,16 @@ import (
 	"go.unistack.org/micro/v3/logger"
 )

+// DefaultTracer is the global default tracer
+var DefaultTracer Tracer = NewTracer()
+
 var (
-	// DefaultTracer is the global default tracer
-	DefaultTracer Tracer = NewTracer() //nolint:revive
 	// TraceIDKey is the key used for the trace id in the log call
 	TraceIDKey = "trace-id"
 	// SpanIDKey is the key used for the span id in the log call
 	SpanIDKey = "span-id"
-	// DefaultSkipEndpoints is the slice of endpoint that must not be traced
-	DefaultSkipEndpoints = []string{
-		"MeterService.Metrics",
-		"HealthService.Live",
-		"HealthService.Ready",
-		"HealthService.Version",
-	}
-	DefaultContextAttrFuncs []ContextAttrFunc
 )

-type ContextAttrFunc func(ctx context.Context) []interface{}
-
 func init() {
 	logger.DefaultContextAttrFuncs = append(logger.DefaultContextAttrFuncs,
 		func(ctx context.Context) []interface{} {
@ -47,8 +38,6 @@ type Tracer interface {
 	Init(...Option) error
 	// Start a trace
 	Start(ctx context.Context, name string, opts ...SpanOption) (context.Context, Span)
-	// Extract get span metadata from context
-	// Extract(ctx context.Context)
 	// Flush flushes spans
 	Flush(ctx context.Context) error
 }
--- a/tracer/wrapper/wrapper.go
+++ b/tracer/wrapper/wrapper.go
@ -0,0 +1,415 @@
+// Package wrapper provides wrapper for Tracer
+package wrapper // import "go.unistack.org/micro/v3/tracer/wrapper"
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/server"
+	"go.unistack.org/micro/v3/tracer"
+)
+
+var DefaultHeadersExctract = []string{metadata.HeaderXRequestID}
+
+func ExtractDefaultLabels(md metadata.Metadata) []interface{} {
+	labels := make([]interface{}, 0, len(DefaultHeadersExctract))
+	for _, k := range DefaultHeadersExctract {
+		if v, ok := md.Get(k); ok {
+			labels = append(labels, strings.ToLower(k), v)
+		}
+	}
+	return labels
+}
+
+var (
+	DefaultClientCallObserver = func(ctx context.Context, req client.Request, rsp interface{}, opts []client.CallOption, sp tracer.Span, err error) {
+		var labels []interface{}
+		if md, ok := metadata.FromOutgoingContext(ctx); ok {
+			labels = append(labels, ExtractDefaultLabels(md)...)
+		}
+		if err != nil {
+			sp.SetStatus(tracer.SpanStatusError, err.Error())
+		}
+		sp.AddLabels(labels...)
+	}
+
+	DefaultClientStreamObserver = func(ctx context.Context, req client.Request, opts []client.CallOption, stream client.Stream, sp tracer.Span, err error) {
+		var labels []interface{}
+		if md, ok := metadata.FromOutgoingContext(ctx); ok {
+			labels = append(labels, ExtractDefaultLabels(md)...)
+		}
+		if err != nil {
+			sp.SetStatus(tracer.SpanStatusError, err.Error())
+		}
+		sp.AddLabels(labels...)
+	}
+
+	DefaultClientPublishObserver = func(ctx context.Context, msg client.Message, opts []client.PublishOption, sp tracer.Span, err error) {
+		var labels []interface{}
+		if md, ok := metadata.FromOutgoingContext(ctx); ok {
+			labels = append(labels, ExtractDefaultLabels(md)...)
+		}
+		labels = append(labels, ExtractDefaultLabels(msg.Metadata())...)
+		if err != nil {
+			sp.SetStatus(tracer.SpanStatusError, err.Error())
+		}
+		sp.AddLabels(labels...)
+	}
+
+	DefaultServerHandlerObserver = func(ctx context.Context, req server.Request, rsp interface{}, sp tracer.Span, err error) {
+		var labels []interface{}
+		if md, ok := metadata.FromIncomingContext(ctx); ok {
+			labels = append(labels, ExtractDefaultLabels(md)...)
+		}
+		if err != nil {
+			sp.SetStatus(tracer.SpanStatusError, err.Error())
+		}
+		sp.AddLabels(labels...)
+	}
+
+	DefaultServerSubscriberObserver = func(ctx context.Context, msg server.Message, sp tracer.Span, err error) {
+		var labels []interface{}
+		if md, ok := metadata.FromIncomingContext(ctx); ok {
+			labels = append(labels, ExtractDefaultLabels(md)...)
+		}
+		labels = append(labels, ExtractDefaultLabels(msg.Header())...)
+
+		if err != nil {
+			sp.SetStatus(tracer.SpanStatusError, err.Error())
+		}
+		sp.AddLabels(labels...)
+	}
+
+	DefaultClientCallFuncObserver = func(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions, sp tracer.Span, err error) {
+		sp.SetName(fmt.Sprintf("%s.%s call", req.Service(), req.Method()))
+		var labels []interface{}
+		if md, ok := metadata.FromOutgoingContext(ctx); ok {
+			labels = append(labels, ExtractDefaultLabels(md)...)
+		}
+		if err != nil {
+			sp.SetStatus(tracer.SpanStatusError, err.Error())
+		}
+		sp.AddLabels(labels...)
+	}
+
+	DefaultSkipEndpoints = []string{"Meter.Metrics", "Health.Live", "Health.Ready", "Health.Version"}
+)
+
+type tWrapper struct {
+	client.Client
+	serverHandler    server.HandlerFunc
+	serverSubscriber server.SubscriberFunc
+	clientCallFunc   client.CallFunc
+	opts             Options
+}
+
+type (
+	ClientCallObserver       func(context.Context, client.Request, interface{}, []client.CallOption, tracer.Span, error)
+	ClientStreamObserver     func(context.Context, client.Request, []client.CallOption, client.Stream, tracer.Span, error)
+	ClientPublishObserver    func(context.Context, client.Message, []client.PublishOption, tracer.Span, error)
+	ClientCallFuncObserver   func(context.Context, string, client.Request, interface{}, client.CallOptions, tracer.Span, error)
+	ServerHandlerObserver    func(context.Context, server.Request, interface{}, tracer.Span, error)
+	ServerSubscriberObserver func(context.Context, server.Message, tracer.Span, error)
+)
+
+// Options struct
+type Options struct {
+	// Tracer that used for tracing
+	Tracer tracer.Tracer
+	// ClientCallObservers funcs
+	ClientCallObservers []ClientCallObserver
+	// ClientStreamObservers funcs
+	ClientStreamObservers []ClientStreamObserver
+	// ClientPublishObservers funcs
+	ClientPublishObservers []ClientPublishObserver
+	// ClientCallFuncObservers funcs
+	ClientCallFuncObservers []ClientCallFuncObserver
+	// ServerHandlerObservers funcs
+	ServerHandlerObservers []ServerHandlerObserver
+	// ServerSubscriberObservers funcs
+	ServerSubscriberObservers []ServerSubscriberObserver
+	// SkipEndpoints
+	SkipEndpoints []string
+}
+
+// Option func signature
+type Option func(*Options)
+
+// NewOptions create Options from Option slice
+func NewOptions(opts ...Option) Options {
+	options := Options{
+		Tracer:                    tracer.DefaultTracer,
+		ClientCallObservers:       []ClientCallObserver{DefaultClientCallObserver},
+		ClientStreamObservers:     []ClientStreamObserver{DefaultClientStreamObserver},
+		ClientPublishObservers:    []ClientPublishObserver{DefaultClientPublishObserver},
+		ClientCallFuncObservers:   []ClientCallFuncObserver{DefaultClientCallFuncObserver},
+		ServerHandlerObservers:    []ServerHandlerObserver{DefaultServerHandlerObserver},
+		ServerSubscriberObservers: []ServerSubscriberObserver{DefaultServerSubscriberObserver},
+		SkipEndpoints:             DefaultSkipEndpoints,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	return options
+}
+
+// WithTracer pass tracer
+func WithTracer(t tracer.Tracer) Option {
+	return func(o *Options) {
+		o.Tracer = t
+	}
+}
+
+// SkipEndponts
+func SkipEndpoins(eps ...string) Option {
+	return func(o *Options) {
+		o.SkipEndpoints = append(o.SkipEndpoints, eps...)
+	}
+}
+
+// WithClientCallObservers funcs
+func WithClientCallObservers(ob ...ClientCallObserver) Option {
+	return func(o *Options) {
+		o.ClientCallObservers = ob
+	}
+}
+
+// WithClientStreamObservers funcs
+func WithClientStreamObservers(ob ...ClientStreamObserver) Option {
+	return func(o *Options) {
+		o.ClientStreamObservers = ob
+	}
+}
+
+// WithClientPublishObservers funcs
+func WithClientPublishObservers(ob ...ClientPublishObserver) Option {
+	return func(o *Options) {
+		o.ClientPublishObservers = ob
+	}
+}
+
+// WithClientCallFuncObservers funcs
+func WithClientCallFuncObservers(ob ...ClientCallFuncObserver) Option {
+	return func(o *Options) {
+		o.ClientCallFuncObservers = ob
+	}
+}
+
+// WithServerHandlerObservers funcs
+func WithServerHandlerObservers(ob ...ServerHandlerObserver) Option {
+	return func(o *Options) {
+		o.ServerHandlerObservers = ob
+	}
+}
+
+// WithServerSubscriberObservers funcs
+func WithServerSubscriberObservers(ob ...ServerSubscriberObserver) Option {
+	return func(o *Options) {
+		o.ServerSubscriberObservers = ob
+	}
+}
+
+func (ot *tWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range ot.opts.SkipEndpoints {
+		if ep == endpoint {
+			return ot.Client.Call(ctx, req, rsp, opts...)
+		}
+	}
+
+	nctx, sp := ot.opts.Tracer.Start(ctx, fmt.Sprintf("%s.%s rpc-client", req.Service(), req.Method()),
+		tracer.WithSpanKind(tracer.SpanKindClient),
+		tracer.WithSpanLabels(
+			"rpc.service", req.Service(),
+			"rpc.method", req.Method(),
+			"rpc.flavor", "rpc",
+			"rpc.call", "/"+req.Service()+"/"+req.Endpoint(),
+			"rpc.call_type", "unary",
+		),
+	)
+	defer sp.Finish()
+
+	err := ot.Client.Call(nctx, req, rsp, opts...)
+
+	for _, o := range ot.opts.ClientCallObservers {
+		o(nctx, req, rsp, opts, sp, err)
+	}
+
+	return err
+}
+
+func (ot *tWrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range ot.opts.SkipEndpoints {
+		if ep == endpoint {
+			return ot.Client.Stream(ctx, req, opts...)
+		}
+	}
+
+	nctx, sp := ot.opts.Tracer.Start(ctx, fmt.Sprintf("%s.%s rpc-client", req.Service(), req.Method()),
+		tracer.WithSpanKind(tracer.SpanKindClient),
+		tracer.WithSpanLabels(
+			"rpc.service", req.Service(),
+			"rpc.method", req.Method(),
+			"rpc.flavor", "rpc",
+			"rpc.call", "/"+req.Service()+"/"+req.Endpoint(),
+			"rpc.call_type", "stream",
+		),
+	)
+	defer sp.Finish()
+
+	stream, err := ot.Client.Stream(nctx, req, opts...)
+
+	for _, o := range ot.opts.ClientStreamObservers {
+		o(nctx, req, opts, stream, sp, err)
+	}
+
+	return stream, err
+}
+
+func (ot *tWrapper) Publish(ctx context.Context, msg client.Message, opts ...client.PublishOption) error {
+	nctx, sp := ot.opts.Tracer.Start(ctx, msg.Topic()+" publish", tracer.WithSpanKind(tracer.SpanKindProducer))
+	defer sp.Finish()
+	sp.AddLabels("messaging.destination.name", msg.Topic())
+	sp.AddLabels("messaging.operation", "publish")
+	err := ot.Client.Publish(nctx, msg, opts...)
+
+	for _, o := range ot.opts.ClientPublishObservers {
+		o(nctx, msg, opts, sp, err)
+	}
+
+	return err
+}
+
+func (ot *tWrapper) ServerHandler(ctx context.Context, req server.Request, rsp interface{}) error {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Method())
+	for _, ep := range ot.opts.SkipEndpoints {
+		if ep == endpoint {
+			return ot.serverHandler(ctx, req, rsp)
+		}
+	}
+
+	callType := "unary"
+	if req.Stream() {
+		callType = "stream"
+	}
+
+	nctx, sp := ot.opts.Tracer.Start(ctx, fmt.Sprintf("%s.%s rpc-server", req.Service(), req.Method()),
+		tracer.WithSpanKind(tracer.SpanKindServer),
+		tracer.WithSpanLabels(
+			"rpc.service", req.Service(),
+			"rpc.method", req.Method(),
+			"rpc.flavor", "rpc",
+			"rpc.call", "/"+req.Service()+"/"+req.Endpoint(),
+			"rpc.call_type", callType,
+		),
+	)
+	defer sp.Finish()
+
+	err := ot.serverHandler(nctx, req, rsp)
+
+	for _, o := range ot.opts.ServerHandlerObservers {
+		o(nctx, req, rsp, sp, err)
+	}
+
+	return err
+}
+
+func (ot *tWrapper) ServerSubscriber(ctx context.Context, msg server.Message) error {
+	nctx, sp := ot.opts.Tracer.Start(ctx, msg.Topic()+" process", tracer.WithSpanKind(tracer.SpanKindConsumer))
+	defer sp.Finish()
+	sp.AddLabels("messaging.operation", "process")
+	sp.AddLabels("messaging.source.name", msg.Topic())
+	err := ot.serverSubscriber(nctx, msg)
+
+	for _, o := range ot.opts.ServerSubscriberObservers {
+		o(nctx, msg, sp, err)
+	}
+
+	return err
+}
+
+// NewClientWrapper accepts an open tracing Trace and returns a Client Wrapper
+func NewClientWrapper(opts ...Option) client.Wrapper {
+	return func(c client.Client) client.Client {
+		options := NewOptions()
+		for _, o := range opts {
+			o(&options)
+		}
+		return &tWrapper{opts: options, Client: c}
+	}
+}
+
+// NewClientCallWrapper accepts an opentracing Tracer and returns a Call Wrapper
+func NewClientCallWrapper(opts ...Option) client.CallWrapper {
+	return func(h client.CallFunc) client.CallFunc {
+		options := NewOptions()
+		for _, o := range opts {
+			o(&options)
+		}
+
+		ot := &tWrapper{opts: options, clientCallFunc: h}
+		return ot.ClientCallFunc
+	}
+}
+
+func (ot *tWrapper) ClientCallFunc(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Method())
+	for _, ep := range ot.opts.SkipEndpoints {
+		if ep == endpoint {
+			return ot.ClientCallFunc(ctx, addr, req, rsp, opts)
+		}
+	}
+
+	nctx, sp := ot.opts.Tracer.Start(ctx, fmt.Sprintf("%s.%s rpc-client", req.Service(), req.Method()),
+		tracer.WithSpanKind(tracer.SpanKindClient),
+		tracer.WithSpanLabels(
+			"rpc.service", req.Service(),
+			"rpc.method", req.Method(),
+			"rpc.flavor", "rpc",
+			"rpc.call", "/"+req.Service()+"/"+req.Endpoint(),
+			"rpc.call_type", "unary",
+		),
+	)
+
+	defer sp.Finish()
+
+	err := ot.clientCallFunc(nctx, addr, req, rsp, opts)
+
+	for _, o := range ot.opts.ClientCallFuncObservers {
+		o(nctx, addr, req, rsp, opts, sp, err)
+	}
+
+	return err
+}
+
+// NewServerHandlerWrapper accepts an options and returns a Handler Wrapper
+func NewServerHandlerWrapper(opts ...Option) server.HandlerWrapper {
+	return func(h server.HandlerFunc) server.HandlerFunc {
+		options := NewOptions()
+		for _, o := range opts {
+			o(&options)
+		}
+
+		ot := &tWrapper{opts: options, serverHandler: h}
+		return ot.ServerHandler
+	}
+}
+
+// NewServerSubscriberWrapper accepts an opentracing Tracer and returns a Subscriber Wrapper
+func NewServerSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
+	return func(h server.SubscriberFunc) server.SubscriberFunc {
+		options := NewOptions()
+		for _, o := range opts {
+			o(&options)
+		}
+
+		ot := &tWrapper{opts: options, serverSubscriber: h}
+		return ot.ServerSubscriber
+	}
+}
--- a/util/addr/addr.go
+++ b/util/addr/addr.go
@ -1,4 +1,4 @@
-package addr
+package addr // import "go.unistack.org/micro/v3/util/addr"

 import (
 	"fmt"
@ -58,7 +58,6 @@ func IsLocal(addr string) bool {
 }

 // Extract returns a real ip
-//
 //nolint:gocyclo
 func Extract(addr string) (string, error) {
 	// if addr specified then its returned
--- a/util/backoff/backoff.go
+++ b/util/backoff/backoff.go
@ -1,5 +1,5 @@
 // Package backoff provides backoff functionality
-package backoff
+package backoff // import "go.unistack.org/micro/v3/util/backoff"

 import (
 	"math"
--- a/util/buf/buf.go
+++ b/util/buf/buf.go
@ -1,4 +1,4 @@
-package buf
+package buf // import "go.unistack.org/micro/v3/util/buf"

 import (
 	"bytes"
--- a/util/http/http.go
+++ b/util/http/http.go
@ -1,4 +1,4 @@
-package http
+package http // import "go.unistack.org/micro/v3/util/http"

 import (
 	"context"
--- a/util/id/id.go
+++ b/util/id/id.go
@ -1,4 +1,4 @@
-package id
+package id // import "go.unistack.org/micro/v3/util/id"

 import (
 	"context"
@ -71,7 +71,7 @@ func New(opts ...Option) (string, error) {
 func Must(opts ...Option) string {
 	id, err := New(opts...)
 	if err != nil {
-		logger.DefaultLogger.Fatal(context.TODO(), "Must call is failed", err)
+		logger.Fatal(context.TODO(), err)
 	}
 	return id
 }
--- a/util/io/io.go
+++ b/util/io/io.go
@ -1,5 +1,5 @@
 // Package io is for io management
-package io
+package io // import "go.unistack.org/micro/v3/util/io"

 import (
 	"io"
--- a/util/jitter/random.go
+++ b/util/jitter/random.go
@ -1,5 +1,5 @@
 // Package jitter provides a random jitter
-package jitter
+package jitter // import "go.unistack.org/micro/v3/util/jitter"

 import (
 	"time"
--- a/util/jitter/ticker.go
+++ b/util/jitter/ticker.go
@ -1,4 +1,4 @@
-package jitter
+package jitter // import "go.unistack.org/micro/v3/util/jitter"

 import (
 	"context"
--- a/util/net/net.go
+++ b/util/net/net.go
@ -1,4 +1,4 @@
-package net
+package net // import "go.unistack.org/micro/v3/util/net"

 import (
 	"errors"
--- a/util/pki/pki.go
+++ b/util/pki/pki.go
@ -1,6 +1,6 @@
 // Package pki provides PKI all the PKI functions necessary to run micro over an untrusted network
 // including a CA
-package pki
+package pki // import "go.unistack.org/micro/v3/util/pki"

 import (
 	"bytes"
--- a/util/pool/pool.go
+++ b/util/pool/pool.go
@ -1,5 +1,5 @@
 // Package pool is a connection pool
-package pool
+package pool // import "go.unistack.org/micro/v3/util/pool"

 import (
 	"context"
--- a/util/rand/rand.go
+++ b/util/rand/rand.go
@ -1,4 +1,4 @@
-package rand
+package rand // import "go.unistack.org/micro/v3/util/rand"

 import (
 	crand "crypto/rand"
--- a/util/reflect/reflect.go
+++ b/util/reflect/reflect.go
@ -44,37 +44,6 @@ func SliceAppend(b bool) Option {
 	}
 }

-var maxDepth = 32
-
-func mergeMap(dst, src map[string]interface{}, depth int) map[string]interface{} {
-	if depth > maxDepth {
-		return dst
-	}
-	for key, srcVal := range src {
-		if dstVal, ok := dst[key]; ok {
-			srcMap, srcMapOk := mapify(srcVal)
-			dstMap, dstMapOk := mapify(dstVal)
-			if srcMapOk && dstMapOk {
-				srcVal = mergeMap(dstMap, srcMap, depth+1)
-			}
-		}
-		dst[key] = srcVal
-	}
-	return dst
-}
-
-func mapify(i interface{}) (map[string]interface{}, bool) {
-	value := reflect.ValueOf(i)
-	if value.Kind() == reflect.Map {
-		m := map[string]interface{}{}
-		for _, k := range value.MapKeys() {
-			m[k.String()] = value.MapIndex(k).Interface()
-		}
-		return m, true
-	}
-	return map[string]interface{}{}, false
-}
-
 // Merge merges map[string]interface{} to destination struct
 func Merge(dst interface{}, mp map[string]interface{}, opts ...Option) error {
 	options := Options{}
@ -90,11 +59,6 @@ func Merge(dst interface{}, mp map[string]interface{}, opts ...Option) error {
 		return err
 	}

-	if mapper, ok := dst.(map[string]interface{}); ok {
-		dst = mergeMap(mapper, mp, 0)
-		return nil
-	}
-
 	var err error
 	var sval reflect.Value
 	var fname string
--- a/util/reflect/reflect_test.go
+++ b/util/reflect/reflect_test.go
@ -4,27 +4,6 @@ import (
 	"testing"
 )

-func TestMergeMap(t *testing.T) {
-	src := map[string]interface{}{
-		"skey1": "sval1",
-		"skey2": map[string]interface{}{
-			"skey3": "sval3",
-		},
-	}
-	dst := map[string]interface{}{
-		"skey1": "dval1",
-		"skey2": map[string]interface{}{
-			"skey3": "dval3",
-		},
-	}
-
-	if err := Merge(src, dst); err != nil {
-		t.Fatal(err)
-	}
-
-	t.Logf("%#+v", src)
-}
-
 func TestFieldName(t *testing.T) {
 	src := "SomeVar"
 	chk := "some_var"
--- a/util/reflect/struct.go
+++ b/util/reflect/struct.go
@ -25,48 +25,6 @@ type StructField struct {
 	Field reflect.StructField
 }

-// StructFieldNameByTag get struct field name by tag key and its value
-func StructFieldNameByTag(src interface{}, tkey string, tval string) (string, interface{}, error) {
-	sv := reflect.ValueOf(src)
-	if sv.Kind() == reflect.Ptr {
-		sv = sv.Elem()
-	}
-	if sv.Kind() != reflect.Struct {
-		return "", nil, ErrInvalidStruct
-	}
-
-	typ := sv.Type()
-	for idx := 0; idx < typ.NumField(); idx++ {
-		fld := typ.Field(idx)
-		val := sv.Field(idx)
-		if len(fld.PkgPath) != 0 {
-			continue
-		}
-
-		if ts, ok := fld.Tag.Lookup(tkey); ok {
-			for _, p := range strings.Split(ts, ",") {
-				if p == tval {
-					return fld.Name, val.Interface(), nil
-				}
-			}
-		}
-
-		switch val.Kind() {
-		case reflect.Ptr:
-			if val = val.Elem(); val.Kind() == reflect.Struct {
-				if name, fld, err := StructFieldNameByTag(val.Interface(), tkey, tval); err == nil {
-					return name, fld, nil
-				}
-			}
-		case reflect.Struct:
-			if name, fld, err := StructFieldNameByTag(val.Interface(), tkey, tval); err == nil {
-				return name, fld, nil
-			}
-		}
-	}
-	return "", nil, ErrNotFound
-}
-
 // StructFieldByTag get struct field by tag key and its value
 func StructFieldByTag(src interface{}, tkey string, tval string) (interface{}, error) {
 	sv := reflect.ValueOf(src)
@ -88,6 +46,9 @@ func StructFieldByTag(src interface{}, tkey string, tval string) (interface{}, e
 		if ts, ok := fld.Tag.Lookup(tkey); ok {
 			for _, p := range strings.Split(ts, ",") {
 				if p == tval {
+					if val.Kind() != reflect.Ptr && val.CanAddr() {
+						val = val.Addr()
+					}
 					return val.Interface(), nil
 				}
 			}
@ -111,21 +72,10 @@ func StructFieldByTag(src interface{}, tkey string, tval string) (interface{}, e

 // ZeroFieldByPath clean struct field by its path
 func ZeroFieldByPath(src interface{}, path string) error {
-	if src == nil {
-		return nil
-	}
 	var err error
 	val := reflect.ValueOf(src)

-	if IsEmpty(val) {
-		return nil
-	}
-
 	for _, p := range strings.Split(path, ".") {
-		if IsEmpty(val) {
-			return nil
-		}
-
 		val, err = structValueByName(val, p)
 		if err != nil {
 			return err
@ -543,7 +493,6 @@ func btSplitter(str string) []string {
 }

 // queryToMap turns something like a[b][c]=4 into
-//
 //   map[string]interface{}{
 //     "a": map[string]interface{}{
 // 		  "b": map[string]interface{}{
--- a/util/reflect/struct_test.go
+++ b/util/reflect/struct_test.go
@ -190,9 +190,9 @@ func TestStructFieldByTag(t *testing.T) {
 		t.Fatal(err)
 	}

-	if v, ok := iface.([]string); !ok {
+	if v, ok := iface.(*[]string); !ok {
 		t.Fatalf("not *[]string %v", iface)
-	} else if len(v) != 2 {
+	} else if len(*v) != 2 {
 		t.Fatalf("invalid number %v", iface)
 	}
 }
--- a/util/register/util.go
+++ b/util/register/util.go
@ -1,4 +1,4 @@
-package register
+package register // import "go.unistack.org/micro/v3/util/register"

 import (
 	"context"
--- a/util/ring/buffer.go
+++ b/util/ring/buffer.go
@ -1,5 +1,5 @@
 // Package ring provides a simple ring buffer for storing local data
-package ring
+package ring // import "go.unistack.org/micro/v3/util/ring"

 import (
 	"sync"
--- a/util/socket/socket.go
+++ b/util/socket/socket.go
@ -1,5 +1,5 @@
 // Package socket provides a pseudo socket
-package socket
+package socket // import "go.unistack.org/micro/v3/util/socket"

 import (
 	"io"
--- a/util/sort/sort_test.go
+++ b/util/sort/sort_test.go
@ -1,60 +0,0 @@
-package sort
-
-import (
-	"reflect"
-	"testing"
-)
-
-func TestUniq(t *testing.T) {
-	type args struct {
-		labels []interface{}
-	}
-
-	tests := []struct {
-		name string
-		args args
-		want []interface{}
-	}{
-		{
-			name: "test#1",
-			args: args{
-				labels: append(make([]interface{}, 0), "test-1", 1, "test-2", 2),
-			},
-			want: append(make([]interface{}, 0), "test-1", 1, "test-2", 2),
-		},
-		{
-			name: "test#2",
-			args: args{
-				labels: append(make([]interface{}, 0), "test-1", 1, "test-2", 2, "test-2", 2),
-			},
-			want: append(make([]interface{}, 0), "test-1", 1, "test-2", 2),
-		},
-		{
-			name: "test#3",
-			args: args{
-				labels: append(make([]interface{}, 0), "test-1", 1, "test-2", 2, "test-2", 3),
-			},
-			want: append(make([]interface{}, 0), "test-1", 1, "test-2", 3),
-		},
-		{
-			name: "test#4",
-			args: args{
-				labels: append(make([]interface{}, 0),
-					"test-1", 1, "test-1", 2,
-					"test-2", 3, "test-2", 2,
-					"test-3", 5, "test-3", 3,
-					"test-1", 4, "test-1", 1),
-			},
-			want: append(make([]interface{}, 0), "test-1", 1, "test-2", 2, "test-3", 3),
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			var got []interface{}
-			if got = Uniq(tt.args.labels); !reflect.DeepEqual(got, tt.want) {
-				t.Errorf("Uniq() = %v, want %v", got, tt.want)
-			}
-			t.Logf("got-%#v", got)
-		})
-	}
-}
--- a/util/stream/stream.go
+++ b/util/stream/stream.go
@ -1,5 +1,5 @@
 // Package stream encapsulates streams within streams
-package stream
+package stream // import "go.unistack.org/micro/v3/util/stream"

 import (
 	"context"
--- a/util/time/duration.go
+++ b/util/time/duration.go
@ -6,8 +6,6 @@ import (
 	"fmt"
 	"strconv"
 	"time"
-
-	"gopkg.in/yaml.v3"
 )

 type Duration int64
@ -55,31 +53,6 @@ loop:
 	return time.ParseDuration(fmt.Sprintf("%dh%s", hours, s[p:]))
 }

-func (d Duration) MarshalYAML() (interface{}, error) {
-	return time.Duration(d).String(), nil
-}
-
-func (d *Duration) UnmarshalYAML(n *yaml.Node) error {
-	var v interface{}
-	if err := yaml.Unmarshal([]byte(n.Value), &v); err != nil {
-		return err
-	}
-	switch value := v.(type) {
-	case float64:
-		*d = Duration(time.Duration(value))
-		return nil
-	case string:
-		dv, err := ParseDuration(value)
-		if err != nil {
-			return err
-		}
-		*d = Duration(dv)
-		return nil
-	default:
-		return fmt.Errorf("invalid duration")
-	}
-}
-
 func (d Duration) MarshalJSON() ([]byte, error) {
 	return json.Marshal(time.Duration(d).String())
 }
--- a/util/time/duration_test.go
+++ b/util/time/duration_test.go
@ -5,44 +5,8 @@ import (
 	"encoding/json"
 	"testing"
 	"time"
-
-	"gopkg.in/yaml.v3"
 )

-func TestMarshalYAML(t *testing.T) {
-	d := Duration(10000000)
-	buf, err := yaml.Marshal(d)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !bytes.Equal(buf, []byte(`10ms
-`)) {
-		t.Fatalf("invalid duration: %s != %s", buf, `10ms`)
-	}
-}
-
-func TestUnmarshalYAML(t *testing.T) {
-	type str struct {
-		TTL Duration `yaml:"ttl"`
-	}
-	v := &str{}
-	var err error
-
-	err = yaml.Unmarshal([]byte(`{"ttl":"10ms"}`), v)
-	if err != nil {
-		t.Fatal(err)
-	} else if v.TTL != 10000000 {
-		t.Fatalf("invalid duration %v != 10000000", v.TTL)
-	}
-
-	err = yaml.Unmarshal([]byte(`{"ttl":"1y"}`), v)
-	if err != nil {
-		t.Fatal(err)
-	} else if v.TTL != 31622400000000000 {
-		t.Fatalf("invalid duration %v != 31622400000000000", v.TTL)
-	}
-}
-
 func TestMarshalJSON(t *testing.T) {
 	d := Duration(10000000)
 	buf, err := json.Marshal(d)
--- a/util/xpool/pool.go
+++ b/util/xpool/pool.go
@ -1,78 +1,11 @@
 package pool

-import (
-	"bytes"
-	"strconv"
-	"strings"
-	"sync"
-	"sync/atomic"
-	"time"
-
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/semconv"
-)
-
-var (
-	pools   = make([]Statser, 0)
-	poolsMu sync.Mutex
-)
-
-// Stats struct
-type Stats struct {
-	Get uint64
-	Put uint64
-	Mis uint64
-	Ret uint64
-}
-
-// Statser provides buffer pool stats
-type Statser interface {
-	Stats() Stats
-	Cap() int
-}
-
-func init() {
-	go newStatsMeter()
-}
-
-func newStatsMeter() {
-	ticker := time.NewTicker(meter.DefaultMeterStatsInterval)
-	defer ticker.Stop()
-
-	for {
-		select {
-		case <-ticker.C:
-			poolsMu.Lock()
-			for _, st := range pools {
-				stats := st.Stats()
-				meter.DefaultMeter.Counter(semconv.PoolGetTotal, "capacity", strconv.Itoa(st.Cap())).Set(stats.Get)
-				meter.DefaultMeter.Counter(semconv.PoolPutTotal, "capacity", strconv.Itoa(st.Cap())).Set(stats.Put)
-				meter.DefaultMeter.Counter(semconv.PoolMisTotal, "capacity", strconv.Itoa(st.Cap())).Set(stats.Mis)
-				meter.DefaultMeter.Counter(semconv.PoolRetTotal, "capacity", strconv.Itoa(st.Cap())).Set(stats.Ret)
-			}
-			poolsMu.Unlock()
-		}
-	}
-}
-
-var (
-	_ Statser = (*BytePool)(nil)
-	_ Statser = (*BytesPool)(nil)
-	_ Statser = (*StringsPool)(nil)
-)
+import "sync"

 type Pool[T any] struct {
 	p *sync.Pool
 }

-func (p Pool[T]) Put(t T) {
-	p.p.Put(t)
-}
-
-func (p Pool[T]) Get() T {
-	return p.p.Get().(T)
-}
-
 func NewPool[T any](fn func() T) Pool[T] {
 	return Pool[T]{
 		p: &sync.Pool{
@ -83,155 +16,10 @@ func NewPool[T any](fn func() T) Pool[T] {
 	}
 }

-type BytePool struct {
-	p   *sync.Pool
-	get uint64
-	put uint64
-	mis uint64
-	ret uint64
-	c   int
+func (p Pool[T]) Get() T {
+	return p.p.Get().(T)
 }

-func NewBytePool(size int) *BytePool {
-	p := &BytePool{c: size}
-	p.p = &sync.Pool{
-		New: func() interface{} {
-			atomic.AddUint64(&p.mis, 1)
-			b := make([]byte, 0, size)
-			return &b
-		},
-	}
-	poolsMu.Lock()
-	pools = append(pools, p)
-	poolsMu.Unlock()
-	return p
-}
-
-func (p *BytePool) Cap() int {
-	return p.c
-}
-
-func (p *BytePool) Stats() Stats {
-	return Stats{
-		Put: atomic.LoadUint64(&p.put),
-		Get: atomic.LoadUint64(&p.get),
-		Mis: atomic.LoadUint64(&p.mis),
-		Ret: atomic.LoadUint64(&p.ret),
-	}
-}
-
-func (p *BytePool) Get() *[]byte {
-	atomic.AddUint64(&p.get, 1)
-	return p.p.Get().(*[]byte)
-}
-
-func (p *BytePool) Put(b *[]byte) {
-	atomic.AddUint64(&p.put, 1)
-	if cap(*b) > p.c {
-		atomic.AddUint64(&p.ret, 1)
-		return
-	}
-	*b = (*b)[:0]
-	p.p.Put(b)
-}
-
-type BytesPool struct {
-	p   *sync.Pool
-	get uint64
-	put uint64
-	mis uint64
-	ret uint64
-	c   int
-}
-
-func NewBytesPool(size int) *BytesPool {
-	p := &BytesPool{c: size}
-	p.p = &sync.Pool{
-		New: func() interface{} {
-			atomic.AddUint64(&p.mis, 1)
-			b := bytes.NewBuffer(make([]byte, 0, size))
-			return b
-		},
-	}
-	poolsMu.Lock()
-	pools = append(pools, p)
-	poolsMu.Unlock()
-	return p
-}
-
-func (p *BytesPool) Cap() int {
-	return p.c
-}
-
-func (p *BytesPool) Stats() Stats {
-	return Stats{
-		Put: atomic.LoadUint64(&p.put),
-		Get: atomic.LoadUint64(&p.get),
-		Mis: atomic.LoadUint64(&p.mis),
-		Ret: atomic.LoadUint64(&p.ret),
-	}
-}
-
-func (p *BytesPool) Get() *bytes.Buffer {
-	return p.p.Get().(*bytes.Buffer)
-}
-
-func (p *BytesPool) Put(b *bytes.Buffer) {
-	if (*b).Cap() > p.c {
-		atomic.AddUint64(&p.ret, 1)
-		return
-	}
-	b.Reset()
-	p.p.Put(b)
-}
-
-type StringsPool struct {
-	p   *sync.Pool
-	get uint64
-	put uint64
-	mis uint64
-	ret uint64
-	c   int
-}
-
-func NewStringsPool(size int) *StringsPool {
-	p := &StringsPool{c: size}
-	p.p = &sync.Pool{
-		New: func() interface{} {
-			atomic.AddUint64(&p.mis, 1)
-			return &strings.Builder{}
-		},
-	}
-	poolsMu.Lock()
-	pools = append(pools, p)
-	poolsMu.Unlock()
-	return p
-}
-
-func (p *StringsPool) Cap() int {
-	return p.c
-}
-
-func (p *StringsPool) Stats() Stats {
-	return Stats{
-		Put: atomic.LoadUint64(&p.put),
-		Get: atomic.LoadUint64(&p.get),
-		Mis: atomic.LoadUint64(&p.mis),
-		Ret: atomic.LoadUint64(&p.ret),
-	}
-}
-
-func (p *StringsPool) Get() *strings.Builder {
-	atomic.AddUint64(&p.get, 1)
-	return p.p.Get().(*strings.Builder)
-}
-
-func (p *StringsPool) Put(b *strings.Builder) {
-	atomic.AddUint64(&p.put, 1)
-	if b.Cap() > p.c {
-		atomic.AddUint64(&p.ret, 1)
-		return
-	}
-	b.Reset()
-	p.p.Put(b)
+func (p Pool[T]) Put(t T) {
+	p.p.Put(t)
 }
--- a/util/xpool/pool_test.go
+++ b/util/xpool/pool_test.go
@ -2,30 +2,12 @@ package pool

 import (
 	"bytes"
+	"strings"
 	"testing"
 )

-func TestByte(t *testing.T) {
-	p := NewBytePool(1024)
-	b := p.Get()
-	copy(*b, []byte(`test`))
-	if bytes.Equal(*b, []byte("test")) {
-		t.Fatal("pool not works")
-	}
-	p.Put(b)
-	b = p.Get()
-	for i := 0; i < 1500; i++ {
-		*b = append(*b, []byte(`test`)...)
-	}
-	p.Put(b)
-	st := p.Stats()
-	if st.Get != 2 && st.Put != 2 && st.Mis != 1 && st.Ret != 1 {
-		t.Fatalf("pool stats error %#+v", st)
-	}
-}
-
 func TestBytes(t *testing.T) {
-	p := NewBytesPool(1024)
+	p := NewPool(func() *bytes.Buffer { return bytes.NewBuffer(nil) })
 	b := p.Get()
 	b.Write([]byte(`test`))
 	if b.String() != "test" {
@ -35,7 +17,7 @@ func TestBytes(t *testing.T) {
 }

 func TestStrings(t *testing.T) {
-	p := NewStringsPool(20)
+	p := NewPool(func() *strings.Builder { return &strings.Builder{} })
 	b := p.Get()
 	b.Write([]byte(`test`))
 	if b.String() != "test" {