metadata: fix for grpc case (#370)

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
Reviewed-on: #370

.gitea/workflows/job_lint.yml

@@ -1,24 +1,26 @@
 name: lint
+
 on:
   pull_request:
+    types: [opened, reopened, synchronize]
     branches:
     - master
     - v3
+    - v4
+
 jobs:
   lint:
-    name: lint
     runs-on: ubuntu-latest
     steps:
     - name: setup-go
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v5
       with:
-        go-version: 1.21
+        go-version: 'stable'
     - name: checkout
       uses: actions/checkout@v3
     - name: deps
       run: go get -v -d ./...
     - name: lint
-      uses: https://github.com/golangci/golangci-lint-action@v3.4.0
-      continue-on-error: true
+      uses: https://github.com/golangci/golangci-lint-action@v6
       with:
-        version: v1.52
+        version: 'latest'

.gitea/workflows/job_test.yml

@@ -1,22 +1,30 @@
-name: pr
+name: test
+
 on:
   pull_request:
+    types: [opened, reopened, synchronize]
     branches:
     - master
     - v3
+    - v4
+  push:
+    branches:
+    - master
+    - v3
+    - v4
+
 jobs:
   test:
-    name: test
     runs-on: ubuntu-latest
     steps:
+    - name: setup-go
+      uses: actions/setup-go@v5
+      with:
+        go-version: 'stable'
     - name: checkout
       uses: actions/checkout@v3
-    - name: setup-go
-      uses: actions/setup-go@v3
-      with:
-        go-version: 1.21
     - name: deps
-      run: go get -v -t -d ./...
+      run: go get -v -d ./...
     - name: test
       env:
         INTEGRATION_TESTS: yes

.golangci.yml

@@ -1,44 +1,5 @@
 run:
-  concurrency: 4
+  concurrency: 8
   deadline: 5m
   issues-exit-code: 1
   tests: true
-
-linters-settings:
-  govet:
-    check-shadowing: true
-    enable:
-      - fieldalignment
-
-linters:
-  enable:
-    - govet
-    - deadcode
-    - errcheck
-    - govet
-    - ineffassign
-    - staticcheck
-    - structcheck
-    - typecheck
-    - unused
-    - varcheck
-    - bodyclose
-    - gci
-    - goconst
-    - gocritic
-    - gosimple
-    - gofmt
-    - gofumpt
-    - goimports
-    - revive
-    - gosec
-    - makezero
-    - misspell
-    - nakedret
-    - nestif
-    - nilerr
-    - noctx
-    - prealloc
-    - unconvert
-    - unparam
-  disable-all: false

broker/broker.go

@@ -1,5 +1,5 @@
 // Package broker is an interface used for asynchronous messaging
-package broker // import "go.unistack.org/micro/v3/broker"
+package broker
 
 import (
 	"context"
@@ -46,6 +46,12 @@ type Broker interface {
 	BatchSubscribe(ctx context.Context, topic string, h BatchHandler, opts ...SubscribeOption) (Subscriber, error)
 	// String type of broker
 	String() string
+	// Live returns broker liveness
+	Live() bool
+	// Ready returns broker readiness
+	Ready() bool
+	// Health returns broker health
+	Health() bool
 }
 
 type (
@@ -88,6 +94,8 @@ 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

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.Errorf(m.opts.Context, "ack failed: %v", err)
+							m.opts.Logger.Error(m.opts.Context, "broker ack error", 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, err.Error())
+								m.opts.Logger.Error(m.opts.Context, "broker handler error", err)
 							}
 						} else if sub.opts.AutoAck {
 							if err = p.Ack(); err != nil {
-								m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
+								m.opts.Logger.Error(m.opts.Context, "broker ack error", err)
 							}
 						}
 					}
@@ -339,6 +339,18 @@ func (m *memoryBroker) Name() string {
 	return m.opts.Name
 }
 
+func (m *memoryBroker) Live() bool {
+	return true
+}
+
+func (m *memoryBroker) Ready() bool {
+	return true
+}
+
+func (m *memoryBroker) Health() bool {
+	return true
+}
+
 func (m *memoryEvent) Topic() string {
 	return m.topic
 }
@@ -373,6 +385,10 @@ 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
 }

broker/memory/memory_test.go

@@ -74,7 +74,7 @@ func TestMemoryBroker(t *testing.T) {
 	topic := "test"
 	count := 10
 
-	fn := func(p broker.Event) error {
+	fn := func(_ broker.Event) error {
 		return nil
 	}
 

broker/noop.go

@@ -25,6 +25,18 @@ func NewBroker(opts ...Option) *NoopBroker {
 	return b
 }
 
+func (b *NoopBroker) Health() bool {
+	return true
+}
+
+func (b *NoopBroker) Live() bool {
+	return true
+}
+
+func (b *NoopBroker) Ready() bool {
+	return true
+}
+
 func (b *NoopBroker) Name() string {
 	return b.opts.Name
 }

broker/options.go

@@ -16,6 +16,9 @@ import (
 
 // Options struct
 type Options struct {
+	// Name holds the broker name
+	Name string
+
 	// Tracer used for tracing
 	Tracer tracer.Tracer
 	// Register can be used for clustering
@@ -28,23 +31,25 @@ type Options struct {
 	Meter meter.Meter
 	// Context holds external options
 	Context context.Context
+
+	// Wait waits for a collection of goroutines to finish
+	Wait *sync.WaitGroup
 	// TLSConfig holds tls.TLSConfig options
 	TLSConfig *tls.Config
+
 	// ErrorHandler used when broker can't unmarshal incoming message
 	ErrorHandler Handler
 	// BatchErrorHandler used when broker can't unmashal incoming messages
 	BatchErrorHandler BatchHandler
-	// Name holds the broker name
-	Name string
+
 	// Addrs holds the broker address
 	Addrs []string
-	// Wait waits for a collection of goroutines to finish
-	Wait *sync.WaitGroup
-	// GracefulTimeout contains time to wait to finish in flight requests
-	GracefulTimeout time.Duration
 	// Hooks can be run before broker Publish/BatchPublish and
 	// Subscribe/BatchSubscribe methods
 	Hooks options.Hooks
+
+	// GracefulTimeout contains time to wait to finish in flight requests
+	GracefulTimeout time.Duration
 }
 
 // NewOptions create new Options

client/backoff.go

@@ -17,13 +17,13 @@ func BackoffExp(_ context.Context, _ Request, attempts int) (time.Duration, erro
 }
 
 // BackoffInterval specifies randomization interval for backoff func
-func BackoffInterval(min time.Duration, max time.Duration) BackoffFunc {
+func BackoffInterval(minTime time.Duration, maxTime time.Duration) BackoffFunc {
 	return func(_ context.Context, _ Request, attempts int) (time.Duration, error) {
 		td := time.Duration(math.Pow(float64(attempts), math.E)) * time.Millisecond * 100
-		if td < min {
-			return min, nil
-		} else if td > max {
-			return max, nil
+		if td < minTime {
+			return minTime, nil
+		} else if td > maxTime {
+			return maxTime, nil
 		}
 		return td, nil
 	}

client/backoff_test.go

@@ -34,23 +34,23 @@ func TestBackoffExp(t *testing.T) {
 }
 
 func TestBackoffInterval(t *testing.T) {
-	min := 100 * time.Millisecond
-	max := 300 * time.Millisecond
+	minTime := 100 * time.Millisecond
+	maxTime := 300 * time.Millisecond
 
 	r := &testRequest{
 		service: "test",
 		method:  "test",
 	}
 
-	fn := BackoffInterval(min, max)
+	fn := BackoffInterval(minTime, maxTime)
 	for i := 0; i < 5; i++ {
 		d, err := fn(context.TODO(), r, i)
 		if err != nil {
 			t.Fatal(err)
 		}
 
-		if d < min || d > max {
-			t.Fatalf("Expected %v < %v < %v", min, d, max)
+		if d < minTime || d > maxTime {
+			t.Fatalf("Expected %v < %v < %v", minTime, d, maxTime)
 		}
 	}
 }

client/client.go

@@ -1,5 +1,5 @@
 // Package client is an interface for an RPC client
-package client // import "go.unistack.org/micro/v3/client"
+package client
 
 import (
 	"context"

client/noop.go

@@ -222,7 +222,7 @@ func (n *noopClient) Call(ctx context.Context, req Request, rsp interface{}, opt
 	ts := time.Now()
 	n.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", req.Endpoint()).Inc()
 	var sp tracer.Span
-	ctx, sp = n.opts.Tracer.Start(ctx, req.Endpoint()+" rpc-client",
+	ctx, sp = n.opts.Tracer.Start(ctx, "rpc-client",
 		tracer.WithSpanKind(tracer.SpanKindClient),
 		tracer.WithSpanLabels("endpoint", req.Endpoint()),
 	)
@@ -298,7 +298,7 @@ func (n *noopClient) fnCall(ctx context.Context, req Request, rsp interface{}, o
 		// call backoff first. Someone may want an initial start delay
 		t, err := callOpts.Backoff(ctx, req, i)
 		if err != nil {
-			return errors.InternalServerError("go.micro.client", err.Error())
+			return errors.InternalServerError("go.micro.client", "%s", err)
 		}
 
 		// only sleep if greater than 0
@@ -312,7 +312,7 @@ func (n *noopClient) fnCall(ctx context.Context, req Request, rsp interface{}, o
 			// TODO apply any filtering here
 			routes, err = n.opts.Lookup(ctx, req, callOpts)
 			if err != nil {
-				return errors.InternalServerError("go.micro.client", err.Error())
+				return errors.InternalServerError("go.micro.client", "%s", err)
 			}
 
 			// balance the list of nodes
@@ -372,7 +372,7 @@ func (n *noopClient) fnCall(ctx context.Context, req Request, rsp interface{}, o
 	return gerr
 }
 
-func (n *noopClient) NewRequest(service, endpoint string, req interface{}, opts ...RequestOption) Request {
+func (n *noopClient) NewRequest(service, endpoint string, _ interface{}, _ ...RequestOption) Request {
 	return &noopRequest{service: service, endpoint: endpoint}
 }
 
@@ -385,7 +385,7 @@ func (n *noopClient) Stream(ctx context.Context, req Request, opts ...CallOption
 	ts := time.Now()
 	n.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", req.Endpoint()).Inc()
 	var sp tracer.Span
-	ctx, sp = n.opts.Tracer.Start(ctx, req.Endpoint()+" rpc-client",
+	ctx, sp = n.opts.Tracer.Start(ctx, "rpc-client",
 		tracer.WithSpanKind(tracer.SpanKindClient),
 		tracer.WithSpanLabels("endpoint", req.Endpoint()),
 	)
@@ -466,7 +466,7 @@ func (n *noopClient) fnStream(ctx context.Context, req Request, opts ...CallOpti
 		// call backoff first. Someone may want an initial start delay
 		t, cerr := callOpts.Backoff(ctx, req, i)
 		if cerr != nil {
-			return nil, errors.InternalServerError("go.micro.client", cerr.Error())
+			return nil, errors.InternalServerError("go.micro.client", "%s", cerr)
 		}
 
 		// only sleep if greater than 0
@@ -480,7 +480,7 @@ func (n *noopClient) fnStream(ctx context.Context, req Request, opts ...CallOpti
 			// TODO apply any filtering here
 			routes, err = n.opts.Lookup(ctx, req, callOpts)
 			if err != nil {
-				return nil, errors.InternalServerError("go.micro.client", err.Error())
+				return nil, errors.InternalServerError("go.micro.client", "%s", err)
 			}
 
 			// balance the list of nodes
@@ -546,7 +546,7 @@ func (n *noopClient) fnStream(ctx context.Context, req Request, opts ...CallOpti
 	return nil, grr
 }
 
-func (n *noopClient) stream(ctx context.Context, addr string, req Request, opts CallOptions) (Stream, error) {
+func (n *noopClient) stream(ctx context.Context, _ string, _ Request, _ CallOptions) (Stream, error) {
 	return &noopStream{ctx: ctx}, nil
 }
 
@@ -609,13 +609,13 @@ func (n *noopClient) publish(ctx context.Context, ps []Message, opts ...PublishO
 			// use codec for payload
 			cf, err := n.newCodec(p.ContentType())
 			if err != nil {
-				return errors.InternalServerError("go.micro.client", err.Error())
+				return errors.InternalServerError("go.micro.client", "%s", err)
 			}
 
 			// set the body
 			b, err := cf.Marshal(p.Payload())
 			if err != nil {
-				return errors.InternalServerError("go.micro.client", err.Error())
+				return errors.InternalServerError("go.micro.client", "%s", err)
 			}
 			body = b
 		}

client/options.go

@@ -11,7 +11,6 @@ import (
 	"go.unistack.org/micro/v3/logger"
 	"go.unistack.org/micro/v3/metadata"
 	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/network/transport"
 	"go.unistack.org/micro/v3/options"
 	"go.unistack.org/micro/v3/register"
 	"go.unistack.org/micro/v3/router"
@@ -22,8 +21,16 @@ import (
 
 // Options holds client options
 type Options struct {
-	// Transport used for transfer messages
-	Transport transport.Transport
+	// Codecs map
+	Codecs map[string]codec.Codec
+
+	// Proxy is used for proxy requests
+	Proxy string
+	// ContentType is used to select codec
+	ContentType string
+	// Name is the client name
+	Name string
+
 	// Selector used to select needed address
 	Selector selector.Selector
 	// Logger used to log messages
@@ -38,31 +45,28 @@ type Options struct {
 	Context context.Context
 	// Router used to get route
 	Router router.Router
+
 	// TLSConfig specifies tls.Config for secure connection
 	TLSConfig *tls.Config
-	// Codecs map
-	Codecs map[string]codec.Codec
+
 	// Lookup func used to get destination addr
 	Lookup LookupFunc
-	// Proxy is used for proxy requests
-	Proxy string
-	// ContentType is used to select codec
-	ContentType string
-	// Name is the client name
-	Name string
+	// ContextDialer used to connect
+	ContextDialer func(context.Context, string) (net.Conn, error)
+
 	// Wrappers contains wrappers
 	Wrappers []Wrapper
+	// Hooks can be run before broker Publish/BatchPublish and
+	// Subscribe/BatchSubscribe methods
+	Hooks options.Hooks
+
 	// CallOptions contains default CallOptions
 	CallOptions CallOptions
+
 	// PoolSize connection pool size
 	PoolSize int
 	// PoolTTL connection pool ttl
 	PoolTTL time.Duration
-	// ContextDialer used to connect
-	ContextDialer func(context.Context, string) (net.Conn, error)
-	// Hooks can be run before broker Publish/BatchPublish and
-	// Subscribe/BatchSubscribe methods
-	Hooks options.Hooks
 }
 
 // NewCallOptions creates new call options struct
@@ -76,6 +80,16 @@ func NewCallOptions(opts ...CallOption) CallOptions {
 
 // CallOptions holds client call options
 type CallOptions struct {
+	// RequestMetadata holds additional metadata for call
+	RequestMetadata metadata.Metadata
+
+	// Network name
+	Network string
+	// Content-Type
+	ContentType string
+	// AuthToken string
+	AuthToken string
+
 	// Selector selects addr
 	Selector selector.Selector
 	// Context used for deadline
@@ -83,33 +97,30 @@ type CallOptions struct {
 	// Router used for route
 	Router router.Router
 	// Retry func used for retries
+
+	// ResponseMetadata holds additional metadata from call
+	ResponseMetadata *metadata.Metadata
+
 	Retry RetryFunc
 	// Backoff func used for backoff when retry
 	Backoff BackoffFunc
-	// Network name
-	Network string
-	// Content-Type
-	ContentType string
-	// AuthToken string
-	AuthToken string
+	// ContextDialer used to connect
+	ContextDialer func(context.Context, string) (net.Conn, error)
+
 	// Address specifies static addr list
 	Address []string
 	// SelectOptions selector options
 	SelectOptions []selector.SelectOption
+
 	// StreamTimeout stream timeout
 	StreamTimeout time.Duration
 	// RequestTimeout request timeout
 	RequestTimeout time.Duration
-	// RequestMetadata holds additional metadata for call
-	RequestMetadata metadata.Metadata
-	// ResponseMetadata holds additional metadata from call
-	ResponseMetadata *metadata.Metadata
+
 	// DialTimeout dial timeout
 	DialTimeout time.Duration
 	// Retries specifies retries num
 	Retries int
-	// ContextDialer used to connect
-	ContextDialer func(context.Context, string) (net.Conn, error)
 }
 
 // ContextDialer pass ContextDialer to client
@@ -194,18 +205,16 @@ func NewOptions(opts ...Option) Options {
 			Retry:          DefaultRetry,
 			Retries:        DefaultRetries,
 			RequestTimeout: DefaultRequestTimeout,
-			DialTimeout:    transport.DefaultDialTimeout,
 		},
-		Lookup:    LookupRoute,
-		PoolSize:  DefaultPoolSize,
-		PoolTTL:   DefaultPoolTTL,
-		Selector:  random.NewSelector(),
-		Logger:    logger.DefaultLogger,
-		Broker:    broker.DefaultBroker,
-		Meter:     meter.DefaultMeter,
-		Tracer:    tracer.DefaultTracer,
-		Router:    router.DefaultRouter,
-		Transport: transport.DefaultTransport,
+		Lookup:   LookupRoute,
+		PoolSize: DefaultPoolSize,
+		PoolTTL:  DefaultPoolTTL,
+		Selector: random.NewSelector(),
+		Logger:   logger.DefaultLogger,
+		Broker:   broker.DefaultBroker,
+		Meter:    meter.DefaultMeter,
+		Tracer:   tracer.DefaultTracer,
+		Router:   router.DefaultRouter,
 	}
 
 	for _, o := range opts {
@@ -278,13 +287,6 @@ func PoolTTL(d time.Duration) Option {
 	}
 }
 
-// Transport to use for communication e.g http, rabbitmq, etc
-func Transport(t transport.Transport) Option {
-	return func(o *Options) {
-		o.Transport = t
-	}
-}
-
 // Register sets the routers register
 func Register(r register.Register) Option {
 	return func(o *Options) {
@@ -334,14 +336,6 @@ func TLSConfig(t *tls.Config) Option {
 	return func(o *Options) {
 		// set the internal tls
 		o.TLSConfig = t
-
-		// set the default transport if one is not
-		// already set. Required for Init call below.
-
-		// set the transport tls
-		_ = o.Transport.Init(
-			transport.TLSConfig(t),
-		)
 	}
 }
 
@@ -507,13 +501,6 @@ func WithAuthToken(t string) CallOption {
 	}
 }
 
-// WithNetwork is a CallOption which sets the network attribute
-func WithNetwork(n string) CallOption {
-	return func(o *CallOptions) {
-		o.Network = n
-	}
-}
-
 // WithRouter sets the router to use for this call
 func WithRouter(r router.Router) CallOption {
 	return func(o *CallOptions) {

cluster/cluster.go

@@ -38,4 +38,10 @@ type Cluster interface {
 	Broadcast(ctx context.Context, msg Message, filter ...string) error
 	// Unicast send message to single member in cluster
 	Unicast(ctx context.Context, node Node, msg Message) error
+	// Live returns cluster liveness
+	Live() bool
+	// Ready returns cluster readiness
+	Ready() bool
+	// Health returns cluster health
+	Health() bool
 }

codec/codec.go

@@ -1,19 +1,8 @@
 // Package codec is an interface for encoding messages
-package codec // import "go.unistack.org/micro/v3/codec"
+package codec
 
 import (
 	"errors"
-	"io"
-
-	"go.unistack.org/micro/v3/metadata"
-)
-
-// Message types
-const (
-	Error MessageType = iota
-	Request
-	Response
-	Event
 )
 
 var (
@@ -24,65 +13,23 @@ 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"
 )
 
-// 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.
+// Codec encodes/decodes various types of messages.
 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
 }
 
-// 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
+type CodecV2 interface {
+	Marshal(buf []byte, v interface{}, opts ...Option) ([]byte, error)
+	Unmarshal(buf []byte, v interface{}, opts ...Option) error
+	String() string
 }
 
 // RawMessage is a raw encoded JSON value.
@@ -93,6 +40,8 @@ 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
 }

codec/noop.go

@@ -2,70 +2,14 @@ package codec
 
 import (
 	"encoding/json"
-	"io"
+
+	codecpb "go.unistack.org/micro-proto/v3/codec"
 )
 
 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"
 }
@@ -91,8 +35,8 @@ func (c *noopCodec) Marshal(v interface{}, opts ...Option) ([]byte, error) {
 		return ve, nil
 	case *Frame:
 		return ve.Data, nil
-	case *Message:
-		return ve.Body, nil
+	case *codecpb.Frame:
+		return ve.Data, nil
 	}
 
 	return json.Marshal(v)
@@ -115,8 +59,8 @@ func (c *noopCodec) Unmarshal(d []byte, v interface{}, opts ...Option) error {
 	case *Frame:
 		ve.Data = d
 		return nil
-	case *Message:
-		ve.Body = d
+	case *codecpb.Frame:
+		ve.Data = d
 		return nil
 	}
 

codec/options.go

@@ -23,15 +23,8 @@ type Options struct {
 	Context context.Context
 	// TagName specifies tag name in struct to control codec
 	TagName string
-	// 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
-	}
+	// Flatten specifies that struct must be analyzed for flatten tag
+	Flatten bool
 }
 
 // TagName sets the codec tag name in struct
@@ -41,6 +34,13 @@ 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) {
@@ -65,12 +65,12 @@ func Meter(m meter.Meter) Option {
 // NewOptions returns new options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Context:    context.Background(),
-		Logger:     logger.DefaultLogger,
-		Meter:      meter.DefaultMeter,
-		Tracer:     tracer.DefaultTracer,
-		MaxMsgSize: DefaultMaxMsgSize,
-		TagName:    DefaultTagName,
+		Context: context.Background(),
+		Logger:  logger.DefaultLogger,
+		Meter:   meter.DefaultMeter,
+		Tracer:  tracer.DefaultTracer,
+		TagName: DefaultTagName,
+		Flatten: false,
 	}
 
 	for _, o := range opts {

config/config.go

@@ -1,5 +1,5 @@
 // Package config is an interface for dynamic configuration.
-package config // import "go.unistack.org/micro/v3/config"
+package config
 
 import (
 	"context"
@@ -13,7 +13,7 @@ type Validator interface {
 }
 
 // DefaultConfig default config
-var DefaultConfig Config = NewConfig()
+var DefaultConfig = NewConfig()
 
 // DefaultWatcherMinInterval default min interval for poll changes
 var DefaultWatcherMinInterval = 5 * time.Second
@@ -138,7 +138,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s BeforeLoad err: %v", c.String(), err)
+				c.Options().Logger.Error(ctx, c.String()+" BeforeLoad error", err)
 				if !c.Options().AllowFail {
 					return err
 				}
@@ -153,7 +153,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s AfterLoad err: %v", c.String(), err)
+				c.Options().Logger.Error(ctx, c.String()+" AfterLoad error", err)
 				if !c.Options().AllowFail {
 					return err
 				}
@@ -168,7 +168,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s BeforeSave err: %v", c.String(), err)
+				c.Options().Logger.Error(ctx, c.String()+" BeforeSave error", err)
 				if !c.Options().AllowFail {
 					return err
 				}
@@ -183,7 +183,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s AfterSave err: %v", c.String(), err)
+				c.Options().Logger.Error(ctx, c.String()+" AfterSave error", err)
 				if !c.Options().AllowFail {
 					return err
 				}
@@ -198,7 +198,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s BeforeInit err: %v", c.String(), err)
+				c.Options().Logger.Error(ctx, c.String()+" BeforeInit error", err)
 				if !c.Options().AllowFail {
 					return err
 				}
@@ -213,7 +213,7 @@ var (
 				return nil
 			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s AfterInit err: %v", c.String(), err)
+				c.Options().Logger.Error(ctx, c.String()+" AfterInit error", err)
 				if !c.Options().AllowFail {
 					return err
 				}

config/default_test.go

@@ -3,6 +3,7 @@ package config_test
 import (
 	"context"
 	"fmt"
+	"reflect"
 	"testing"
 	"time"
 
@@ -12,15 +13,17 @@ import (
 )
 
 type cfg struct {
-	StringValue    string `default:"string_value"`
-	IgnoreValue    string `json:"-"`
-	StructValue    *cfgStructValue
-	IntValue       int             `default:"99"`
-	DurationValue  time.Duration   `default:"10s"`
-	MDurationValue mtime.Duration  `default:"10s"`
-	MapValue       map[string]bool `default:"key1=true,key2=false"`
-	UUIDValue      string          `default:"micro:generate uuid"`
-	IDValue        string          `default:"micro:generate id"`
+	MapValue    map[string]bool `default:"key1=true,key2=false"`
+	StructValue *cfgStructValue
+
+	StringValue string `default:"string_value"`
+	IgnoreValue string `json:"-"`
+	UUIDValue   string `default:"micro:generate uuid"`
+	IDValue     string `default:"micro:generate id"`
+
+	DurationValue  time.Duration  `default:"10s"`
+	MDurationValue mtime.Duration `default:"10s"`
+	IntValue       int            `default:"99"`
 }
 
 type cfgStructValue struct {
@@ -134,3 +137,13 @@ func TestValidate(t *testing.T) {
 		t.Fatal(err)
 	}
 }
+
+func Test_SizeOf(t *testing.T) {
+	st := cfg{}
+
+	tVal := reflect.TypeOf(st)
+	for i := 0; i < tVal.NumField(); i++ {
+		field := tVal.Field(i)
+		fmt.Printf("Field: %s, Offset: %d, Size: %d\n", field.Name, field.Offset, field.Type.Size())
+	}
+}

config/options.go

@@ -41,14 +41,16 @@ type Options struct {
 	BeforeInit []func(context.Context, Config) error
 	// AfterInit contains slice of funcs that runs after Init
 	AfterInit []func(context.Context, Config) error
-	// AllowFail flag to allow fail in config source
-	AllowFail bool
+
 	// SkipLoad runs only if condition returns true
 	SkipLoad func(context.Context, Config) bool
 	// SkipSave runs only if condition returns true
 	SkipSave func(context.Context, Config) bool
 	// Hooks can be run before/after config Save/Load
 	Hooks options.Hooks
+
+	// AllowFail flag to allow fail in config source
+	AllowFail bool
 }
 
 // Option function signature
@@ -278,10 +280,10 @@ func WatchCoalesce(b bool) WatchOption {
 }
 
 // WatchInterval specifies min and max time.Duration for pulling changes
-func WatchInterval(min, max time.Duration) WatchOption {
+func WatchInterval(minTime, maxTime time.Duration) WatchOption {
 	return func(o *WatchOptions) {
-		o.MinInterval = min
-		o.MaxInterval = max
+		o.MinInterval = minTime
+		o.MaxInterval = maxTime
 	}
 }
 

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 // import "go.unistack.org/micro/v3/errors"
+package errors
 
 import (
 	"bytes"
@@ -44,6 +44,20 @@ 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

errors/errors_test.go

@@ -2,7 +2,7 @@ package errors
 
 import (
 	"encoding/json"
-	er "errors"
+	"errors"
 	"fmt"
 	"net/http"
 	"testing"
@@ -26,7 +26,7 @@ func TestMarshalJSON(t *testing.T) {
 func TestEmpty(t *testing.T) {
 	msg := "test"
 	var err *Error
-	err = FromError(fmt.Errorf(msg))
+	err = FromError(errors.New(msg))
 	if err.Detail != msg {
 		t.Fatalf("invalid error %v", err)
 	}
@@ -42,7 +42,7 @@ func TestFromError(t *testing.T) {
 	if merr.ID != "go.micro.test" || merr.Code != 404 {
 		t.Fatalf("invalid conversation %v != %v", err, merr)
 	}
-	err = er.New(err.Error())
+	err = errors.New(err.Error())
 	merr = FromError(err)
 	if merr.ID != "go.micro.test" || merr.Code != 404 {
 		t.Fatalf("invalid conversation %v != %v", err, merr)
@@ -57,7 +57,7 @@ func TestEqual(t *testing.T) {
 		t.Fatal("errors must be equal")
 	}
 
-	err3 := er.New("my test err")
+	err3 := errors.New("my test err")
 	if Equal(err1, err3) {
 		t.Fatal("errors must be not equal")
 	}

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.Errorf(w.opts.Context, "store error: %v", werr)
+			w.opts.Logger.Error(w.opts.Context, "store write error", 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.Errorf(w.opts.Context, "store error: %v", werr)
+		w.opts.Logger.Error(w.opts.Context, "store write error", 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.Tracef(nctx, "will be executed %v", steps[idx][nidx])
+					w.opts.Logger.Trace(nctx, fmt.Sprintf("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.Errorf(ctx, "store write error: %v", werr)
+								w.opts.Logger.Error(ctx, "store write error", 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.Errorf(ctx, "store write error: %v", werr)
+								w.opts.Logger.Error(ctx, "store write error", werr)
 							}
 							cherr <- serr
 							return
 						}
 						if werr := stepStore.Write(ctx, step.ID()+w.opts.Store.Options().Separator+"rsp", rsp); werr != nil {
-							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+							w.opts.Logger.Error(ctx, "store write error", 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.Errorf(ctx, "store write error: %v", werr)
+							w.opts.Logger.Error(ctx, "store write error", 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.Errorf(ctx, "store write error: %v", werr)
+							w.opts.Logger.Error(ctx, "store write error", 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.Errorf(ctx, "store write error: %v", werr)
+							w.opts.Logger.Error(ctx, "store write error", werr)
 						}
 						cherr <- serr
 						return
 					}
 					if werr := stepStore.Write(ctx, cstep.ID()+w.opts.Store.Options().Separator+"rsp", rsp); werr != nil {
-						w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+						w.opts.Logger.Error(ctx, "store write error", werr)
 						cherr <- werr
 						return
 					}
@@ -317,7 +317,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 		return eid, nil
 	}
 
-	logger.Tracef(ctx, "wait for finish or error")
+	logger.DefaultLogger.Trace(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.Errorf(w.opts.Context, "store error: %v", werr)
+			w.opts.Logger.Error(w.opts.Context, "store write error", werr)
 		}
 	case err == nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
-			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
+			w.opts.Logger.Error(w.opts.Context, "store write error", werr)
 		}
 	case err != nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusFailure.String())}); werr != nil {
-			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
+			w.opts.Logger.Error(w.opts.Context, "store write error", werr)
 		}
 	}
 

flow/flow.go

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

fsm/default.go

@@ -32,7 +32,7 @@ type fsm struct {
 
 // NewFSM creates a new finite state machine having the specified initial state
 // with specified options
-func NewFSM(opts ...Option) *fsm {
+func NewFSM(opts ...Option) FSM {
 	return &fsm{
 		statesMap: map[string]StateFunc{},
 		opts:      NewOptions(opts...),

fsm/fsm.go

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

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.Fields("state", s.Name()))
+			sctx = logger.NewContext(sctx, logger.DefaultLogger.Fields("state", s.Name()))
 			return next(sctx, s, opts...)
 		}
 	}

go.mod

@@ -1,20 +1,33 @@
 module go.unistack.org/micro/v3
 
-go 1.20
+go 1.22
 
 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 v1.31.0
+	google.golang.org/protobuf v1.33.0
+	gopkg.in/yaml.v3 v3.0.1
 )
 
 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
 )

go.sum

@@ -2,23 +2,68 @@ 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=
@@ -26,8 +71,10 @@ 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 v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
-google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
+google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/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=

logger/context.go

@@ -4,6 +4,17 @@ 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.Clone()
+	}
+	if l, ok := ctx.Value(loggerKey{}).(Logger); ok && l != nil {
+		return l
+	}
+	return DefaultLogger.Clone()
+}
+
 // FromContext returns logger from passed context
 func FromContext(ctx context.Context) (Logger, bool) {
 	if ctx == nil {

logger/logger.go

@@ -1,5 +1,5 @@
 // Package logger provides a log interface
-package logger // import "go.unistack.org/micro/v3/logger"
+package logger
 
 import (
 	"context"
@@ -11,11 +11,9 @@ var DefaultContextAttrFuncs []ContextAttrFunc
 
 var (
 	// DefaultLogger variable
-	DefaultLogger Logger = NewLogger()
+	DefaultLogger = NewLogger()
 	// DefaultLevel used by logger
 	DefaultLevel = InfoLevel
-	// DefaultCallerSkipCount used by logger
-	DefaultCallerSkipCount = 2
 )
 
 // Logger is a generic logging interface
@@ -33,33 +31,19 @@ type Logger interface {
 	// Fields set fields to always be logged with keyval pairs
 	Fields(fields ...interface{}) Logger
 	// Info level message
-	Info(ctx context.Context, args ...interface{})
+	Info(ctx context.Context, msg string, args ...interface{})
 	// Trace level message
-	Trace(ctx context.Context, args ...interface{})
+	Trace(ctx context.Context, msg string, args ...interface{})
 	// Debug level message
-	Debug(ctx context.Context, args ...interface{})
+	Debug(ctx context.Context, msg string, args ...interface{})
 	// Warn level message
-	Warn(ctx context.Context, args ...interface{})
+	Warn(ctx context.Context, msg string, args ...interface{})
 	// Error level message
-	Error(ctx context.Context, args ...interface{})
+	Error(ctx context.Context, msg string, args ...interface{})
 	// Fatal level message
-	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{})
+	Fatal(ctx context.Context, msg string, args ...interface{})
 	// Log logs message with needed level
-	Log(ctx context.Context, level Level, args ...interface{})
-	// Logf logs message with needed level
-	Logf(ctx context.Context, level Level, msg string, args ...interface{})
+	Log(ctx context.Context, level Level, msg string, args ...interface{})
 	// Name returns broker instance name
 	Name() string
 	// String returns the type of logger
@@ -68,108 +52,3 @@ 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...)
-}

logger/noop.go

@@ -4,12 +4,17 @@ 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}
 }
 
@@ -51,44 +56,23 @@ func (l *noopLogger) String() string {
 	return "noop"
 }
 
-func (l *noopLogger) Log(ctx context.Context, lvl Level, attrs ...interface{}) {
+func (l *noopLogger) Log(ctx context.Context, lvl Level, msg string, attrs ...interface{}) {
 }
 
-func (l *noopLogger) Info(ctx context.Context, attrs ...interface{}) {
+func (l *noopLogger) Info(ctx context.Context, msg string, attrs ...interface{}) {
 }
 
-func (l *noopLogger) Debug(ctx context.Context, attrs ...interface{}) {
+func (l *noopLogger) Debug(ctx context.Context, msg string, attrs ...interface{}) {
 }
 
-func (l *noopLogger) Error(ctx context.Context, attrs ...interface{}) {
+func (l *noopLogger) Error(ctx context.Context, msg string, attrs ...interface{}) {
 }
 
-func (l *noopLogger) Trace(ctx context.Context, attrs ...interface{}) {
+func (l *noopLogger) Trace(ctx context.Context, msg string, attrs ...interface{}) {
 }
 
-func (l *noopLogger) Warn(ctx context.Context, attrs ...interface{}) {
+func (l *noopLogger) Warn(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{}) {
+func (l *noopLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
 }

logger/options.go

@@ -6,6 +6,8 @@ import (
 	"log/slog"
 	"os"
 	"time"
+
+	"go.unistack.org/micro/v3/meter"
 )
 
 // Option func signature
@@ -13,18 +15,6 @@ type Option func(*Options)
 
 // Options holds logger options
 type Options struct {
-	// Out holds the output writer
-	Out io.Writer
-	// Context holds exernal options
-	Context context.Context
-	// Name holds the logger name
-	Name string
-	// Fields holds additional metadata
-	Fields []interface{}
-	// CallerSkipCount number of frmaes to skip
-	CallerSkipCount int
-	// ContextAttrFuncs contains funcs that executed before log func on context
-	ContextAttrFuncs []ContextAttrFunc
 	// TimeKey is the key used for the time of the log call
 	TimeKey string
 	// LevelKey is the key used for the level of the log call
@@ -37,14 +27,31 @@ type Options struct {
 	SourceKey string
 	// StacktraceKey is the key used for the stacktrace
 	StacktraceKey string
-	// AddStacktrace controls writing of stacktaces on error
-	AddStacktrace bool
-	// AddSource enabled writing source file and position in log
-	AddSource bool
-	// The logging level the logger should log
-	Level Level
+	// Name holds the logger name
+	Name string
+
+	// Out holds the output writer
+	Out io.Writer
+	// Context holds exernal options
+	Context context.Context
+	// Meter used to count logs for specific level
+	Meter meter.Meter
 	// TimeFunc used to obtain current time
 	TimeFunc func() time.Time
+
+	// Fields holds additional metadata
+	Fields []interface{}
+	// ContextAttrFuncs contains funcs that executed before log func on context
+	ContextAttrFuncs []ContextAttrFunc
+
+	// callerSkipCount number of frmaes to skip
+	CallerSkipCount int
+	// The logging level the logger should log
+	Level Level
+	// AddSource enabled writing source file and position in log
+	AddSource bool
+	// AddStacktrace controls writing of stacktaces on error
+	AddStacktrace bool
 }
 
 // NewOptions creates new options struct
@@ -53,11 +60,11 @@ 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)
@@ -69,13 +76,20 @@ func NewOptions(opts ...Option) Options {
 	return options
 }
 
-// WithContextAttrFuncs appends default funcs for the context arrts filler
+// WithContextAttrFuncs appends default funcs for the context attrs filler
 func WithContextAttrFuncs(fncs ...ContextAttrFunc) Option {
 	return func(o *Options) {
 		o.ContextAttrFuncs = append(o.ContextAttrFuncs, fncs...)
 	}
 }
 
+// WithAddFields add fields for the logger
+func WithAddFields(fields ...interface{}) Option {
+	return func(o *Options) {
+		o.Fields = append(o.Fields, fields...)
+	}
+}
+
 // WithFields set default fields for the logger
 func WithFields(fields ...interface{}) Option {
 	return func(o *Options) {
@@ -97,27 +111,20 @@ func WithOutput(out io.Writer) Option {
 	}
 }
 
-// WitAddStacktrace controls writing stacktrace on error
+// WithAddStacktrace controls writing stacktrace on error
 func WithAddStacktrace(v bool) Option {
 	return func(o *Options) {
 		o.AddStacktrace = v
 	}
 }
 
-// WitAddSource controls writing source file and pos in log
+// WithAddSource 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) {
@@ -132,6 +139,13 @@ 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) {
@@ -142,8 +156,8 @@ func WithTimeFunc(fn func() time.Time) Option {
 func WithZapKeys() Option {
 	return func(o *Options) {
 		o.TimeKey = "@timestamp"
-		o.LevelKey = "level"
-		o.MessageKey = "msg"
+		o.LevelKey = slog.LevelKey
+		o.MessageKey = slog.MessageKey
 		o.SourceKey = "caller"
 		o.StacktraceKey = "stacktrace"
 		o.ErrorKey = "error"
@@ -152,8 +166,8 @@ func WithZapKeys() Option {
 
 func WithZerologKeys() Option {
 	return func(o *Options) {
-		o.TimeKey = "time"
-		o.LevelKey = "level"
+		o.TimeKey = slog.TimeKey
+		o.LevelKey = slog.LevelKey
 		o.MessageKey = "message"
 		o.SourceKey = "caller"
 		o.StacktraceKey = "stacktrace"
@@ -175,8 +189,8 @@ func WithSlogKeys() Option {
 func WithMicroKeys() Option {
 	return func(o *Options) {
 		o.TimeKey = "timestamp"
-		o.LevelKey = "level"
-		o.MessageKey = "msg"
+		o.LevelKey = slog.LevelKey
+		o.MessageKey = slog.MessageKey
 		o.SourceKey = "caller"
 		o.StacktraceKey = "stacktrace"
 		o.ErrorKey = "error"
@@ -186,6 +200,8 @@ func WithMicroKeys() Option {
 // WithAddCallerSkipCount add skip count for copy logger
 func WithAddCallerSkipCount(n int) Option {
 	return func(o *Options) {
-		o.CallerSkipCount += n
+		if n > 0 {
+			o.CallerSkipCount += n
+		}
 	}
 }

logger/slog/slog.go

@@ -2,18 +2,26 @@ package slog
 
 import (
 	"context"
-	"fmt"
 	"log/slog"
 	"os"
+	"reflect"
 	"regexp"
 	"runtime"
 	"strconv"
 	"sync"
+	"sync/atomic"
 
 	"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 (
@@ -25,6 +33,27 @@ var (
 	fatalValue = slog.StringValue("fatal")
 )
 
+type wrapper struct {
+	h     slog.Handler
+	level atomic.Int64
+}
+
+func (h *wrapper) Enabled(ctx context.Context, level slog.Level) bool {
+	return level >= slog.Level(int(h.level.Load()))
+}
+
+func (h *wrapper) Handle(ctx context.Context, rec slog.Record) error {
+	return h.h.Handle(ctx, rec)
+}
+
+func (h *wrapper) WithAttrs(attrs []slog.Attr) slog.Handler {
+	return h.h.WithAttrs(attrs)
+}
+
+func (h *wrapper) WithGroup(name string) slog.Handler {
+	return h.h.WithGroup(name)
+}
+
 func (s *slogLogger) renameAttr(_ []string, a slog.Attr) slog.Attr {
 	switch a.Key {
 	case slog.SourceKey:
@@ -61,8 +90,7 @@ func (s *slogLogger) renameAttr(_ []string, a slog.Attr) slog.Attr {
 }
 
 type slogLogger struct {
-	leveler *slog.LevelVar
-	handler slog.Handler
+	handler *wrapper
 	opts    logger.Options
 	mu      sync.RWMutex
 }
@@ -76,51 +104,52 @@ func (s *slogLogger) Clone(opts ...logger.Option) logger.Logger {
 		o(&options)
 	}
 
-	l := &slogLogger{
-		opts: options,
+	if len(options.ContextAttrFuncs) == 0 {
+		options.ContextAttrFuncs = logger.DefaultContextAttrFuncs
 	}
 
-	l.leveler = new(slog.LevelVar)
-	handleOpt := &slog.HandlerOptions{
-		ReplaceAttr: l.renameAttr,
-		Level:       l.leveler,
-		AddSource:   l.opts.AddSource,
+	attrs, _ := s.argsAttrs(options.Fields)
+	l := &slogLogger{
+		handler: &wrapper{h: s.handler.h.WithAttrs(attrs)},
+		opts:    options,
 	}
-	l.leveler.Set(loggerToSlogLevel(l.opts.Level))
-	l.handler = slog.New(slog.NewJSONHandler(options.Out, handleOpt)).With(options.Fields...).Handler()
+	l.handler.level.Store(int64(loggerToSlogLevel(options.Level)))
 
 	return l
 }
 
 func (s *slogLogger) V(level logger.Level) bool {
-	return s.opts.Level.Enabled(level)
+	s.mu.Lock()
+	v := s.opts.Level.Enabled(level)
+	s.mu.Unlock()
+	return v
 }
 
 func (s *slogLogger) Level(level logger.Level) {
-	s.leveler.Set(loggerToSlogLevel(level))
+	s.mu.Lock()
+	s.opts.Level = level
+	s.handler.level.Store(int64(loggerToSlogLevel(level)))
+	s.mu.Unlock()
 }
 
 func (s *slogLogger) Options() logger.Options {
 	return s.opts
 }
 
-func (s *slogLogger) Fields(attrs ...interface{}) logger.Logger {
+func (s *slogLogger) Fields(fields ...interface{}) logger.Logger {
 	s.mu.RLock()
-	level := s.leveler.Level()
 	options := s.opts
 	s.mu.RUnlock()
 
 	l := &slogLogger{opts: options}
-	l.leveler = new(slog.LevelVar)
-	l.leveler.Set(level)
 
-	handleOpt := &slog.HandlerOptions{
-		ReplaceAttr: l.renameAttr,
-		Level:       l.leveler,
-		AddSource:   l.opts.AddSource,
+	if len(options.ContextAttrFuncs) == 0 {
+		options.ContextAttrFuncs = logger.DefaultContextAttrFuncs
 	}
 
-	l.handler = slog.New(slog.NewJSONHandler(l.opts.Out, handleOpt)).With(attrs...).Handler()
+	attrs, _ := s.argsAttrs(fields)
+	l.handler = &wrapper{h: s.handler.h.WithAttrs(attrs)}
+	l.handler.level.Store(int64(loggerToSlogLevel(l.opts.Level)))
 
 	return l
 }
@@ -128,393 +157,77 @@ func (s *slogLogger) Fields(attrs ...interface{}) logger.Logger {
 func (s *slogLogger) Init(opts ...logger.Option) error {
 	s.mu.Lock()
 
-	if len(s.opts.ContextAttrFuncs) == 0 {
-		s.opts.ContextAttrFuncs = logger.DefaultContextAttrFuncs
-	}
-
 	for _, o := range opts {
 		o(&s.opts)
 	}
 
-	s.leveler = new(slog.LevelVar)
+	if len(s.opts.ContextAttrFuncs) == 0 {
+		s.opts.ContextAttrFuncs = logger.DefaultContextAttrFuncs
+	}
+
 	handleOpt := &slog.HandlerOptions{
 		ReplaceAttr: s.renameAttr,
-		Level:       s.leveler,
+		Level:       loggerToSlogLevel(logger.TraceLevel),
 		AddSource:   s.opts.AddSource,
 	}
-	s.leveler.Set(loggerToSlogLevel(s.opts.Level))
-	s.handler = slog.New(slog.NewJSONHandler(s.opts.Out, handleOpt)).With(s.opts.Fields...).Handler()
+
+	attrs, _ := s.argsAttrs(s.opts.Fields)
+
+	var h slog.Handler
+	if s.opts.Context != nil {
+		if v, ok := s.opts.Context.Value(handlerKey{}).(slog.Handler); ok && v != nil {
+			h = v
+		}
+
+		if fn := s.opts.Context.Value(handlerFnKey{}); fn != nil {
+			if rfn := reflect.ValueOf(fn); rfn.Kind() == reflect.Func {
+				if ret := rfn.Call([]reflect.Value{reflect.ValueOf(s.opts.Out), reflect.ValueOf(handleOpt)}); len(ret) == 1 {
+					if iface, ok := ret[0].Interface().(slog.Handler); ok && iface != nil {
+						h = iface
+					}
+				}
+			}
+		}
+	}
+
+	if h == nil {
+		h = slog.NewJSONHandler(s.opts.Out, handleOpt)
+	}
+
+	s.handler = &wrapper{h: h.WithAttrs(attrs)}
+	s.handler.level.Store(int64(loggerToSlogLevel(s.opts.Level)))
 	s.mu.Unlock()
 
 	return nil
 }
 
-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) Log(ctx context.Context, lvl logger.Level, msg string, attrs ...interface{}) {
+	s.printLog(ctx, lvl, 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) Info(ctx context.Context, msg string, attrs ...interface{}) {
+	s.printLog(ctx, logger.InfoLevel, 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) Debug(ctx context.Context, msg string, attrs ...interface{}) {
+	s.printLog(ctx, logger.DebugLevel, 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) Trace(ctx context.Context, msg string, attrs ...interface{}) {
+	s.printLog(ctx, logger.TraceLevel, 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) Error(ctx context.Context, msg string, attrs ...interface{}) {
+	s.printLog(ctx, logger.ErrorLevel, 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)
+func (s *slogLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
+	s.printLog(ctx, logger.FatalLevel, msg, attrs...)
 	os.Exit(1)
 }
 
-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) Warn(ctx context.Context, msg string, attrs ...interface{}) {
+	s.printLog(ctx, logger.WarnLevel, msg, attrs...)
 }
 
 func (s *slogLogger) Name() string {
@@ -525,10 +238,59 @@ 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
 }
@@ -566,3 +328,39 @@ 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++
+			} 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
+}
+
+type handlerKey struct{}
+
+func WithHandler(h slog.Handler) logger.Option {
+	return logger.SetOption(handlerKey{}, h)
+}
+
+type handlerFnKey struct{}
+
+func WithHandlerFunc(fn any) logger.Option {
+	return logger.SetOption(handlerFnKey{}, fn)
+}

logger/slog/slog_test.go

@@ -3,13 +3,113 @@ package slog
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"log"
+	"log/slog"
+	"strings"
 	"testing"
 
+	"github.com/google/uuid"
 	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v3/metadata"
 )
 
+func TestWithHandlerFunc(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(logger.WithLevel(logger.InfoLevel), logger.WithOutput(buf),
+		WithHandlerFunc(slog.NewTextHandler),
+	)
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+
+	l.Info(ctx, "msg1")
+
+	if !bytes.Contains(buf.Bytes(), []byte(`msg=msg1`)) {
+		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
+	}
+}
+
+func TestWithAddFields(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.Info(ctx, "msg1")
+
+	if err := l.Init(logger.WithAddFields("key1", "val1")); err != nil {
+		t.Fatal(err)
+	}
+	l.Info(ctx, "msg2")
+
+	if err := l.Init(logger.WithAddFields("key2", "val2")); err != nil {
+		t.Fatal(err)
+	}
+	l.Info(ctx, "msg3")
+
+	if !bytes.Contains(buf.Bytes(), []byte(`"key1"`)) {
+		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
+	}
+	if !bytes.Contains(buf.Bytes(), []byte(`"key2"`)) {
+		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
+	}
+}
+
+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)
@@ -29,13 +129,22 @@ 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(); err != nil {
+	if err := l.Init(logger.WithContextAttrFuncs(func(_ context.Context) []interface{} {
+		return nil
+	})); err != nil {
 		t.Fatal(err)
 	}
 
-	l.Errorf(ctx, "message", fmt.Errorf("error message"))
+	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())
+	}
+
 	if !bytes.Contains(buf.Bytes(), []byte(`"stacktrace":"`)) {
 		t.Fatalf("logger stacktrace not works, buf contains: %s", buf.Bytes())
 	}
@@ -99,6 +208,11 @@ 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) {
@@ -174,3 +288,52 @@ 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())
+}

logger/unwrap/unwrap.go

@@ -36,14 +36,14 @@ var (
 	circularShortBytes = []byte("<shown>")
 	invalidAngleBytes  = []byte("<invalid>")
 	filteredBytes      = []byte("<filtered>")
-	openBracketBytes   = []byte("[")
-	closeBracketBytes  = []byte("]")
-	percentBytes       = []byte("%")
-	precisionBytes     = []byte(".")
-	openAngleBytes     = []byte("<")
-	closeAngleBytes    = []byte(">")
-	openMapBytes       = []byte("{")
-	closeMapBytes      = []byte("}")
+	// openBracketBytes   = []byte("[")
+	// closeBracketBytes  = []byte("]")
+	percentBytes    = []byte("%")
+	precisionBytes  = []byte(".")
+	openAngleBytes  = []byte("<")
+	closeAngleBytes = []byte(">")
+	openMapBytes    = []byte("{")
+	closeMapBytes   = []byte("}")
 )
 
 type protoMessage interface {
@@ -52,13 +52,15 @@ type protoMessage interface {
 }
 
 type Wrapper struct {
-	val              interface{}
-	s                fmt.State
-	pointers         map[uintptr]int
-	opts             *Options
+	pointers map[uintptr]int
+	takeMap  map[int]bool
+
+	val  interface{}
+	s    fmt.State
+	opts *Options
+
 	depth            int
 	ignoreNextType   bool
-	takeMap          map[int]bool
 	protoWrapperType bool
 	sqlWrapperType   bool
 }

logger/unwrap/unwrap_test.go

@@ -82,12 +82,12 @@ func TestTagged(t *testing.T) {
 func TestTaggedNested(t *testing.T) {
 	type val struct {
 		key string `logger:"take"`
-		val string `logger:"omit"`
+		// val string `logger:"omit"`
 		unk string
 	}
 	type str struct {
-		key string `logger:"omit"`
-		val *val   `logger:"take"`
+		// key string `logger:"omit"`
+		val *val `logger:"take"`
 	}
 
 	var iface interface{}

logger/wrapper/wrapper.go

@@ -1,399 +0,0 @@
-// 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
-	}
-}

metadata/context.go

@@ -55,10 +55,7 @@ func NewContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	ctx = context.WithValue(ctx, mdKey{}, &rawMetadata{md})
-	ctx = context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{})
-	ctx = context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{})
-	return ctx
+	return context.WithValue(ctx, mdKey{}, &rawMetadata{md})
 }
 
 // SetOutgoingContext modify outgoing context with given metadata
@@ -90,11 +87,7 @@ func NewIncomingContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	ctx = context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{md})
-	if v, ok := ctx.Value(mdOutgoingKey{}).(*rawMetadata); !ok || v == nil {
-		ctx = context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{})
-	}
-	return ctx
+	return context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{md})
 }
 
 // NewOutgoingContext creates a new context with outcoming metadata attached
@@ -102,11 +95,7 @@ func NewOutgoingContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	ctx = context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{md})
-	if v, ok := ctx.Value(mdIncomingKey{}).(*rawMetadata); !ok || v == nil {
-		ctx = context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{})
-	}
-	return ctx
+	return context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{md})
 }
 
 // AppendOutgoingContext apends new md to context

metadata/metadata.go

@@ -1,9 +1,10 @@
 // Package metadata is a way of defining message headers
-package metadata // import "go.unistack.org/micro/v3/metadata"
+package metadata
 
 import (
 	"net/textproto"
 	"sort"
+	"strings"
 )
 
 var (
@@ -73,6 +74,9 @@ func (md Metadata) Get(key string) (string, bool) {
 	if !ok {
 		// slow path
 		val, ok = md[textproto.CanonicalMIMEHeaderKey(key)]
+		if !ok {
+			val, ok = md[strings.ToLower(key)]
+		}
 	}
 	return val, ok
 }
@@ -94,6 +98,8 @@ func (md Metadata) Del(keys ...string) {
 		delete(md, key)
 		// slow path
 		delete(md, textproto.CanonicalMIMEHeaderKey(key))
+		// very slow path
+		delete(md, strings.ToLower(key))
 	}
 }
 

metadata/metadata_test.go

@@ -5,6 +5,37 @@ import (
 	"testing"
 )
 
+func TestLowercase(t *testing.T) {
+	md := New(1)
+	md["x-request-id"] = "12345"
+	v, ok := md.Get("X-Request-Id")
+	if !ok || v == "" {
+		t.Fatalf("metadata invalid %#+v", md)
+	}
+}
+
+func TestMultipleUsage(t *testing.T) {
+	ctx := context.TODO()
+	md := New(0)
+	md.Set("key1_1", "val1_1", "key1_2", "val1_2", "key1_3", "val1_3")
+	ctx = NewIncomingContext(ctx, Copy(md))
+	ctx = NewOutgoingContext(ctx, Copy(md))
+	imd, _ := FromIncomingContext(ctx)
+	omd, _ := FromOutgoingContext(ctx)
+	_ = func(x context.Context) context.Context {
+		m, _ := FromIncomingContext(x)
+		m.Del("key1_2")
+		return ctx
+	}(ctx)
+	_ = func(x context.Context) context.Context {
+		m, _ := FromIncomingContext(x)
+		m.Del("key1_3")
+		return ctx
+	}(ctx)
+	t.Logf("imd %#+v", imd)
+	t.Logf("omd %#+v", omd)
+}
+
 func TestMetadataSetMultiple(t *testing.T) {
 	md := New(4)
 	md.Set("key1", "val1", "key2", "val2", "key3")
@@ -57,6 +88,13 @@ func TestPassing(t *testing.T) {
 
 	ctx = NewIncomingContext(ctx, md1)
 	testCtx(ctx)
+	_, ok := FromOutgoingContext(ctx)
+	if ok {
+		t.Fatalf("create outgoing context")
+	}
+
+	ctx = NewOutgoingContext(ctx, New(1))
+	testCtx(ctx)
 	md, ok := FromOutgoingContext(ctx)
 	if !ok {
 		t.Fatalf("missing metadata from outgoing context")
@@ -80,7 +118,7 @@ func TestMerge(t *testing.T) {
 	}
 }
 
-func TestIterator(t *testing.T) {
+func TestIterator(_ *testing.T) {
 	md := Metadata{
 		"1Last":   "last",
 		"2First":  "first",

meter/meter.go

@@ -11,15 +11,13 @@ import (
 
 var (
 	// DefaultMeter is the default meter
-	DefaultMeter Meter = NewMeter()
+	DefaultMeter = NewMeter()
 	// DefaultAddress data will be made available on this host:port
 	DefaultAddress = ":9090"
 	// DefaultPath the meter endpoint where the Meter data will be made available
 	DefaultPath = "/metrics"
-	// DefaultMetricPrefix holds the string that prepends to all metrics
-	DefaultMetricPrefix = "micro_"
-	// DefaultLabelPrefix holds the string that prepends to all labels
-	DefaultLabelPrefix = "micro_"
+	// DefaultMeterStatsInterval specifies interval for meter updating
+	DefaultMeterStatsInterval = 5 * time.Second
 	// 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

meter/noop.go

@@ -37,32 +37,32 @@ func (r *noopMeter) Init(opts ...Option) error {
 }
 
 // Counter implements the Meter interface
-func (r *noopMeter) Counter(name string, labels ...string) Counter {
+func (r *noopMeter) Counter(_ string, labels ...string) Counter {
 	return &noopCounter{labels: labels}
 }
 
 // FloatCounter implements the Meter interface
-func (r *noopMeter) FloatCounter(name string, labels ...string) FloatCounter {
+func (r *noopMeter) FloatCounter(_ string, labels ...string) FloatCounter {
 	return &noopFloatCounter{labels: labels}
 }
 
 // Gauge implements the Meter interface
-func (r *noopMeter) Gauge(name string, f func() float64, labels ...string) Gauge {
+func (r *noopMeter) Gauge(_ string, _ func() float64, labels ...string) Gauge {
 	return &noopGauge{labels: labels}
 }
 
 // Summary implements the Meter interface
-func (r *noopMeter) Summary(name string, labels ...string) Summary {
+func (r *noopMeter) Summary(_ string, labels ...string) Summary {
 	return &noopSummary{labels: labels}
 }
 
 // SummaryExt implements the Meter interface
-func (r *noopMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) Summary {
+func (r *noopMeter) SummaryExt(_ string, _ time.Duration, _ []float64, labels ...string) Summary {
 	return &noopSummary{labels: labels}
 }
 
 // Histogram implements the Meter interface
-func (r *noopMeter) Histogram(name string, labels ...string) Histogram {
+func (r *noopMeter) Histogram(_ string, labels ...string) Histogram {
 	return &noopHistogram{labels: labels}
 }
 
@@ -77,7 +77,7 @@ func (r *noopMeter) Set(opts ...Option) Meter {
 	return m
 }
 
-func (r *noopMeter) Write(w io.Writer, opts ...Option) error {
+func (r *noopMeter) Write(_ io.Writer, _ ...Option) error {
 	return nil
 }
 

meter/options.go

@@ -2,8 +2,6 @@ package meter
 
 import (
 	"context"
-
-	"go.unistack.org/micro/v3/logger"
 )
 
 // Option powers the configuration for metrics implementations:
@@ -11,8 +9,6 @@ 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
@@ -21,10 +17,6 @@ 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
@@ -36,12 +28,9 @@ type Options struct {
 // NewOptions prepares a set of options:
 func NewOptions(opt ...Option) Options {
 	opts := Options{
-		Address:      DefaultAddress,
-		Path:         DefaultPath,
-		Context:      context.Background(),
-		Logger:       logger.DefaultLogger,
-		MetricPrefix: DefaultMetricPrefix,
-		LabelPrefix:  DefaultLabelPrefix,
+		Address: DefaultAddress,
+		Path:    DefaultPath,
+		Context: context.Background(),
 	}
 
 	for _, o := range opt {
@@ -51,20 +40,6 @@ 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) {
@@ -95,14 +70,7 @@ func TimingObjectives(value map[float64]float64) Option {
 }
 */
 
-// Logger sets the logger
-func Logger(l logger.Logger) Option {
-	return func(o *Options) {
-		o.Logger = l
-	}
-}
-
-// Labels sets the meter labels
+// Labels add the meter labels
 func Labels(ls ...string) Option {
 	return func(o *Options) {
 		o.Labels = append(o.Labels, ls...)

meter/wrapper/wrapper.go

@@ -1,347 +0,0 @@
-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
-	}
-}

micro.go

@@ -65,6 +65,8 @@ func As(b any, target any) bool {
 			break
 		case targetType.Implements(routerType):
 			break
+		case targetType.Implements(tracerType):
+			break
 		default:
 			return false
 		}
@@ -76,19 +78,21 @@ func As(b any, target any) bool {
 	return false
 }
 
-var brokerType = reflect.TypeOf((*broker.Broker)(nil)).Elem()
-var loggerType = reflect.TypeOf((*logger.Logger)(nil)).Elem()
-var clientType = reflect.TypeOf((*client.Client)(nil)).Elem()
-var serverType = reflect.TypeOf((*server.Server)(nil)).Elem()
-var codecType = reflect.TypeOf((*codec.Codec)(nil)).Elem()
-var flowType = reflect.TypeOf((*flow.Flow)(nil)).Elem()
-var fsmType = reflect.TypeOf((*fsm.FSM)(nil)).Elem()
-var meterType = reflect.TypeOf((*meter.Meter)(nil)).Elem()
-var registerType = reflect.TypeOf((*register.Register)(nil)).Elem()
-var resolverType = reflect.TypeOf((*resolver.Resolver)(nil)).Elem()
-var routerType = reflect.TypeOf((*router.Router)(nil)).Elem()
-var selectorType = reflect.TypeOf((*selector.Selector)(nil)).Elem()
-var storeType = reflect.TypeOf((*store.Store)(nil)).Elem()
-var syncType = reflect.TypeOf((*sync.Sync)(nil)).Elem()
-var tracerType = reflect.TypeOf((*tracer.Tracer)(nil)).Elem()
-var serviceType = reflect.TypeOf((*Service)(nil)).Elem()
+var (
+	brokerType   = reflect.TypeOf((*broker.Broker)(nil)).Elem()
+	loggerType   = reflect.TypeOf((*logger.Logger)(nil)).Elem()
+	clientType   = reflect.TypeOf((*client.Client)(nil)).Elem()
+	serverType   = reflect.TypeOf((*server.Server)(nil)).Elem()
+	codecType    = reflect.TypeOf((*codec.Codec)(nil)).Elem()
+	flowType     = reflect.TypeOf((*flow.Flow)(nil)).Elem()
+	fsmType      = reflect.TypeOf((*fsm.FSM)(nil)).Elem()
+	meterType    = reflect.TypeOf((*meter.Meter)(nil)).Elem()
+	registerType = reflect.TypeOf((*register.Register)(nil)).Elem()
+	resolverType = reflect.TypeOf((*resolver.Resolver)(nil)).Elem()
+	routerType   = reflect.TypeOf((*router.Router)(nil)).Elem()
+	selectorType = reflect.TypeOf((*selector.Selector)(nil)).Elem()
+	storeType    = reflect.TypeOf((*store.Store)(nil)).Elem()
+	syncType     = reflect.TypeOf((*sync.Sync)(nil)).Elem()
+	tracerType   = reflect.TypeOf((*tracer.Tracer)(nil)).Elem()
+	serviceType  = reflect.TypeOf((*Service)(nil)).Elem()
+)

micro_test.go

@@ -18,26 +18,27 @@ func TestAs(t *testing.T) {
 	testCases := []struct {
 		b      any
 		target any
-		match  bool
 		want   any
+
+		match bool
 	}{
 		{
-			broTarget,
-			&b,
-			true,
-			broTarget,
+			b:      broTarget,
+			target: &b,
+			match:  true,
+			want:   broTarget,
 		},
 		{
-			nil,
-			&b,
-			false,
-			nil,
+			b:      nil,
+			target: &b,
+			match:  false,
+			want:   nil,
 		},
 		{
-			fsmTarget,
-			&b,
-			false,
-			nil,
+			b:      fsmTarget,
+			target: &b,
+			match:  false,
+			want:   nil,
 		},
 	}
 	for i, tc := range testCases {
@@ -66,7 +67,13 @@ type bro struct {
 
 func (p *bro) Name() string { return p.name }
 
-func (p *bro) Init(opts ...broker.Option) error { return nil }
+func (p *bro) Live() bool { return true }
+
+func (p *bro) Ready() bool { return true }
+
+func (p *bro) Health() bool { return true }
+
+func (p *bro) Init(_ ...broker.Option) error { return nil }
 
 // Options returns broker options
 func (p *bro) Options() broker.Options { return broker.Options{} }
@@ -75,28 +82,28 @@ func (p *bro) Options() broker.Options { return broker.Options{} }
 func (p *bro) Address() string { return "" }
 
 // Connect connects to broker
-func (p *bro) Connect(ctx context.Context) error { return nil }
+func (p *bro) Connect(_ context.Context) error { return nil }
 
 // Disconnect disconnect from broker
-func (p *bro) Disconnect(ctx context.Context) error { return nil }
+func (p *bro) Disconnect(_ context.Context) error { return nil }
 
 // Publish message, msg can be single broker.Message or []broker.Message
-func (p *bro) Publish(ctx context.Context, topic string, msg *broker.Message, opts ...broker.PublishOption) error {
+func (p *bro) Publish(_ context.Context, _ string, _ *broker.Message, _ ...broker.PublishOption) error {
 	return nil
 }
 
 // BatchPublish messages to broker with multiple topics
-func (p *bro) BatchPublish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
+func (p *bro) BatchPublish(_ context.Context, _ []*broker.Message, _ ...broker.PublishOption) error {
 	return nil
 }
 
 // BatchSubscribe subscribes to topic messages via handler
-func (p *bro) BatchSubscribe(ctx context.Context, topic string, h broker.BatchHandler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
+func (p *bro) BatchSubscribe(_ context.Context, _ string, _ broker.BatchHandler, _ ...broker.SubscribeOption) (broker.Subscriber, error) {
 	return nil, nil
 }
 
 // Subscribe subscribes to topic message via handler
-func (p *bro) Subscribe(ctx context.Context, topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
+func (p *bro) Subscribe(_ context.Context, _ string, _ broker.Handler, _ ...broker.SubscribeOption) (broker.Subscriber, error) {
 	return nil, nil
 }
 
@@ -107,9 +114,9 @@ type fsmT struct {
 	name string
 }
 
-func (f *fsmT) Start(ctx context.Context, a interface{}, o ...Option) (interface{}, error) {
+func (f *fsmT) Start(_ context.Context, _ interface{}, _ ...Option) (interface{}, error) {
 	return nil, nil
 }
-func (f *fsmT) Current() string                  { return f.name }
-func (f *fsmT) Reset()                           {}
-func (f *fsmT) State(s string, sf fsm.StateFunc) {}
+func (f *fsmT) Current() string                 { return f.name }
+func (f *fsmT) Reset()                          {}
+func (f *fsmT) State(_ string, _ fsm.StateFunc) {}

mtls/mtls.go

@@ -1,4 +1,4 @@
-package mtls // import "go.unistack.org/micro/v3/mtls"
+package mtls
 
 import (
 	"bytes"

mtls/options.go

@@ -8,19 +8,20 @@ import (
 
 // CertificateOptions holds options for x509.CreateCertificate
 type CertificateOptions struct {
-	Organization          []string
-	OrganizationalUnit    []string
-	CommonName            string
-	OCSPServer            []string
-	IssuingCertificateURL []string
 	SerialNumber          *big.Int
 	NotAfter              time.Time
 	NotBefore             time.Time
-	SignatureAlgorithm    x509.SignatureAlgorithm
-	PublicKeyAlgorithm    x509.PublicKeyAlgorithm
+	CommonName            string
+	Organization          []string
+	OrganizationalUnit    []string
+	OCSPServer            []string
+	IssuingCertificateURL []string
 	ExtKeyUsage           []x509.ExtKeyUsage
-	KeyUsage              x509.KeyUsage
-	IsCA                  bool
+
+	SignatureAlgorithm x509.SignatureAlgorithm
+	PublicKeyAlgorithm x509.PublicKeyAlgorithm
+	KeyUsage           x509.KeyUsage
+	IsCA               bool
 }
 
 // CertificateOrganizationalUnit set OrganizationalUnit in certificate subject

network/network.go

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

network/transport/transport.go

@@ -1,5 +1,5 @@
 // Package transport is an interface for synchronous connection based communication
-package transport // import "go.unistack.org/micro/v3/network/transport"
+package transport
 
 import (
 	"context"
@@ -10,7 +10,7 @@ import (
 
 var (
 	// DefaultTransport is the global default transport
-	DefaultTransport Transport = NewTransport()
+	DefaultTransport = NewTransport()
 	// DefaultDialTimeout the default dial timeout
 	DefaultDialTimeout = time.Second * 5
 )

network/tunnel/broker/broker.go

@@ -1,5 +1,5 @@
 // Package broker is a tunnel broker
-package broker // import "go.unistack.org/micro/v3/network/tunnel/broker"
+package broker
 
 import (
 	"context"
@@ -45,6 +45,18 @@ type (
 	tunnelAddr struct{}
 )
 
+func (t *tunBroker) Live() bool {
+	return true
+}
+
+func (t *tunBroker) Ready() bool {
+	return true
+}
+
+func (t *tunBroker) Health() bool {
+	return true
+}
+
 func (t *tunBroker) Init(opts ...broker.Option) error {
 	for _, o := range opts {
 		o(&t.opts)
@@ -72,7 +84,7 @@ func (t *tunBroker) Disconnect(ctx context.Context) error {
 	return t.tunnel.Close(ctx)
 }
 
-func (t *tunBroker) BatchPublish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
+func (t *tunBroker) BatchPublish(ctx context.Context, msgs []*broker.Message, _ ...broker.PublishOption) error {
 	// TODO: this is probably inefficient, we might want to just maintain an open connection
 	// it may be easier to add broadcast to the tunnel
 	topicMap := make(map[string]tunnel.Session)
@@ -102,7 +114,7 @@ func (t *tunBroker) BatchPublish(ctx context.Context, msgs []*broker.Message, op
 	return nil
 }
 
-func (t *tunBroker) Publish(ctx context.Context, topic string, m *broker.Message, opts ...broker.PublishOption) error {
+func (t *tunBroker) Publish(ctx context.Context, topic string, m *broker.Message, _ ...broker.PublishOption) error {
 	// TODO: this is probably inefficient, we might want to just maintain an open connection
 	// it may be easier to add broadcast to the tunnel
 	c, err := t.tunnel.Dial(ctx, topic, tunnel.DialMode(tunnel.Multicast))
@@ -177,12 +189,12 @@ func (t *tunBatchSubscriber) run() {
 		// receive message
 		m := new(transport.Message)
 		if err := c.Recv(m); err != nil {
-			if logger.V(logger.ErrorLevel) {
-				logger.Error(t.opts.Context, err.Error())
+			if logger.DefaultLogger.V(logger.ErrorLevel) {
+				logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
 			}
 			if err = c.Close(); err != nil {
-				if logger.V(logger.ErrorLevel) {
-					logger.Error(t.opts.Context, err.Error())
+				if logger.DefaultLogger.V(logger.ErrorLevel) {
+					logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
 				}
 			}
 			continue
@@ -222,12 +234,12 @@ func (t *tunSubscriber) run() {
 		// receive message
 		m := new(transport.Message)
 		if err := c.Recv(m); err != nil {
-			if logger.V(logger.ErrorLevel) {
-				logger.Error(t.opts.Context, err.Error())
+			if logger.DefaultLogger.V(logger.ErrorLevel) {
+				logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
 			}
 			if err = c.Close(); err != nil {
-				if logger.V(logger.ErrorLevel) {
-					logger.Error(t.opts.Context, err.Error())
+				if logger.DefaultLogger.V(logger.ErrorLevel) {
+					logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
 				}
 			}
 			continue
@@ -305,6 +317,10 @@ 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...)

network/tunnel/transport/transport.go

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

network/tunnel/tunnel.go

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

options.go

@@ -269,15 +269,7 @@ 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 {
@@ -302,8 +294,8 @@ type loggerOptions struct {
 	brokers   []string
 	registers []string
 	stores    []string
-	meters    []string
-	tracers   []string
+	// meters    []string
+	tracers []string
 }
 
 /*

profiler/http/http.go

@@ -1,5 +1,5 @@
 // Package http enables the http profiler
-package http // import "go.unistack.org/micro/v3/profiler/http"
+package http
 
 import (
 	"context"

profiler/noop.go

@@ -15,6 +15,6 @@ func (p *noopProfiler) String() string {
 }
 
 // NewProfiler returns new noop profiler
-func NewProfiler(opts ...Option) Profiler {
+func NewProfiler(_ ...Option) Profiler {
 	return &noopProfiler{}
 }

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 // import "go.unistack.org/micro/v3/profiler/pprof"
+package pprof
 
 import (
 	"os"

profiler/profile.go

@@ -1,5 +1,5 @@
 // Package profiler is for profilers
-package profiler // import "go.unistack.org/micro/v3/profiler"
+package profiler
 
 // Profiler interface
 type Profiler interface {
@@ -12,7 +12,7 @@ type Profiler interface {
 }
 
 // DefaultProfiler holds the default profiler
-var DefaultProfiler Profiler = NewProfiler()
+var DefaultProfiler = NewProfiler()
 
 // Options holds the options for profiler
 type Options struct {

proxy/proxy.go

@@ -1,5 +1,5 @@
 // Package proxy is a transparent proxy built on the micro/server
-package proxy // import "go.unistack.org/micro/v3/proxy"
+package proxy
 
 import (
 	"context"

register/memory/memory.go

@@ -2,6 +2,7 @@ package register
 
 import (
 	"context"
+	"fmt"
 	"sync"
 	"time"
 
@@ -30,10 +31,10 @@ type record struct {
 }
 
 type memory struct {
-	sync.RWMutex
 	records  map[string]services
 	watchers map[string]*watcher
 	opts     register.Options
+	sync.RWMutex
 }
 
 // services is a KV map with service name as the key and a map of records as the value
@@ -64,7 +65,7 @@ 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.Debugf(m.opts.Context, "Register TTL expired for node %s of service %s", n.ID, service)
+								m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Register TTL expired for node %s of service %s", n.ID, service))
 							}
 							delete(m.records[domain][service][version].Nodes, id)
 						}
@@ -99,11 +100,11 @@ func (m *memory) sendEvent(r *register.Result) {
 	}
 }
 
-func (m *memory) Connect(ctx context.Context) error {
+func (m *memory) Connect(_ context.Context) error {
 	return nil
 }
 
-func (m *memory) Disconnect(ctx context.Context) error {
+func (m *memory) Disconnect(_ context.Context) error {
 	return nil
 }
 
@@ -123,7 +124,7 @@ func (m *memory) Options() register.Options {
 	return m.opts
 }
 
-func (m *memory) Register(ctx context.Context, s *register.Service, opts ...register.RegisterOption) error {
+func (m *memory) Register(_ context.Context, s *register.Service, opts ...register.RegisterOption) error {
 	m.Lock()
 	defer m.Unlock()
 
@@ -151,7 +152,7 @@ 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.Debugf(m.opts.Context, "Register added new service: %s, version: %s", s.Name, s.Version)
+			m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("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})
@@ -191,14 +192,14 @@ func (m *memory) Register(ctx context.Context, s *register.Service, opts ...regi
 
 	if addedNodes {
 		if m.opts.Logger.V(logger.DebugLevel) {
-			m.opts.Logger.Debugf(m.opts.Context, "Register added new node to service: %s, version: %s", s.Name, s.Version)
+			m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("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.Debugf(m.opts.Context, "Updated registration for service: %s, version: %s", s.Name, s.Version)
+				m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("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()
@@ -243,7 +244,7 @@ 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.Debugf(m.opts.Context, "Register removed node from service: %s, version: %s", s.Name, s.Version)
+				m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Register removed node from service: %s, version: %s", s.Name, s.Version))
 			}
 			delete(version.Nodes, n.ID)
 		}
@@ -264,7 +265,7 @@ 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.Debugf(m.opts.Context, "Register removed service: %s", s.Name)
+			m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Register removed service: %s", s.Name))
 		}
 		return nil
 	}
@@ -273,7 +274,7 @@ 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.Debugf(m.opts.Context, "Register removed service: %s, version: %s", s.Name, s.Version)
+		m.opts.Logger.Debug(m.opts.Context, fmt.Sprintf("Register removed service: %s, version: %s", s.Name, s.Version))
 	}
 
 	return nil
@@ -468,9 +469,7 @@ func serviceToRecord(s *register.Service, ttl time.Duration) *record {
 	}
 
 	endpoints := make([]*register.Endpoint, len(s.Endpoints))
-	for i, e := range s.Endpoints {
-		endpoints[i] = e
-	}
+	copy(endpoints, s.Endpoints)
 
 	return &record{
 		Name:      s.Name,

register/memory/memory_test.go

@@ -208,9 +208,9 @@ func TestMemoryRegistryTTLConcurrent(t *testing.T) {
 		}
 	}
 
-	//if len(os.Getenv("IN_TRAVIS_CI")) == 0 {
+	// if len(os.Getenv("IN_TRAVIS_CI")) == 0 {
 	//	t.Logf("test will wait %v, then check TTL timeouts", waitTime)
-	//}
+	// }
 
 	errChan := make(chan error, concurrency)
 	syncChan := make(chan struct{})
@@ -290,27 +290,29 @@ func TestWatcher(t *testing.T) {
 
 	ctx := context.TODO()
 	m := NewRegister()
-	m.Init()
-	m.Connect(ctx)
+	if err := m.Init(); err != nil {
+		t.Fatal(err)
+	}
+	if err := m.Connect(ctx); err != nil {
+		t.Fatal(err)
+	}
 	wc, err := m.Watch(ctx)
 	if err != nil {
 		t.Fatalf("cant watch: %v", err)
 	}
 	defer wc.Stop()
 
+	cherr := make(chan error, 10)
 	var wg sync.WaitGroup
 	wg.Add(1)
 	go func() {
-		for {
-			_, err := wc.Next()
-			if err != nil {
-				t.Fatal("unexpected err", err)
-			}
-			// t.Logf("changes %#+v", ch.Service)
-			wc.Stop()
-			wg.Done()
-			return
+		_, err := wc.Next()
+		if err != nil {
+			cherr <- fmt.Errorf("unexpected err %v", err)
 		}
+		// t.Logf("changes %#+v", ch.Service)
+		wc.Stop()
+		wg.Done()
 	}()
 
 	if err := m.Register(ctx, testSrv); err != nil {

register/register.go

@@ -1,5 +1,5 @@
 // Package register is an interface for service discovery
-package register // import "go.unistack.org/micro/v3/register"
+package register
 
 import (
 	"context"
@@ -18,7 +18,7 @@ var DefaultDomain = "micro"
 
 var (
 	// DefaultRegister is the global default register
-	DefaultRegister Register = NewRegister()
+	DefaultRegister = NewRegister()
 	// ErrNotFound returned when LookupService is called and no services found
 	ErrNotFound = errors.New("service not found")
 	// ErrWatcherStopped returned when when watcher is stopped
@@ -29,17 +29,32 @@ var (
 // and an abstraction over varying implementations
 // {consul, etcd, zookeeper, ...}
 type Register interface {
+	// Name returns register name
 	Name() string
+	// Init initialize register
 	Init(...Option) error
+	// Options returns options for register
 	Options() Options
+	// Connect initialize connect to register
 	Connect(context.Context) error
+	// Disconnect initialize discconection from register
 	Disconnect(context.Context) error
+	// Register service in registry
 	Register(context.Context, *Service, ...RegisterOption) error
+	// Deregister service from registry
 	Deregister(context.Context, *Service, ...DeregisterOption) error
+	// LookupService in registry
 	LookupService(context.Context, string, ...LookupOption) ([]*Service, error)
+	// ListServices in registry
 	ListServices(context.Context, ...ListOption) ([]*Service, error)
+	// Watch registry events
 	Watch(context.Context, ...WatchOption) (Watcher, error)
+	// String returns registry string representation
 	String() string
+	// Live returns register liveness
+	// Live() bool
+	// Ready returns register readiness
+	// Ready() bool
 }
 
 // Service holds service register info

resolver/dns/dns.go

@@ -1,5 +1,5 @@
 // Package dns resolves names to dns records
-package dns // import "go.unistack.org/micro/v3/resolver/dns"
+package dns
 
 import (
 	"context"
@@ -12,9 +12,9 @@ import (
 
 // Resolver is a DNS network resolve
 type Resolver struct {
-	sync.RWMutex
 	goresolver *net.Resolver
 	Address    string
+	mu         sync.RWMutex
 }
 
 // Resolve tries to resolve endpoint address
@@ -39,12 +39,12 @@ func (r *Resolver) Resolve(name string) ([]*resolver.Record, error) {
 		return []*resolver.Record{rec}, nil
 	}
 
-	r.RLock()
+	r.mu.RLock()
 	goresolver := r.goresolver
-	r.RUnlock()
+	r.mu.RUnlock()
 
 	if goresolver == nil {
-		r.Lock()
+		r.mu.Lock()
 		r.goresolver = &net.Resolver{
 			Dial: func(ctx context.Context, _ string, _ string) (net.Conn, error) {
 				d := net.Dialer{
@@ -53,7 +53,7 @@ func (r *Resolver) Resolve(name string) ([]*resolver.Record, error) {
 				return d.DialContext(ctx, "udp", r.Address)
 			},
 		}
-		r.Unlock()
+		r.mu.Unlock()
 	}
 
 	addrs, err := goresolver.LookupIP(context.TODO(), "ip", host)

resolver/dnssrv/dnssrv.go

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

resolver/http/http.go

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

resolver/noop/noop.go

@@ -1,5 +1,5 @@
 // Package noop is a noop resolver
-package noop // import "go.unistack.org/micro/v3/resolver/noop"
+package noop
 
 import (
 	"go.unistack.org/micro/v3/resolver"
@@ -9,6 +9,6 @@ import (
 type Resolver struct{}
 
 // Resolve returns the list of nodes
-func (r *Resolver) Resolve(name string) ([]*resolver.Record, error) {
+func (r *Resolver) Resolve(_ string) ([]*resolver.Record, error) {
 	return []*resolver.Record{}, nil
 }

resolver/registry/registry.go

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

resolver/static/static.go

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

router/router.go

@@ -1,5 +1,5 @@
 // Package router provides a network routing control plane
-package router // import "go.unistack.org/micro/v3/router"
+package router
 
 import (
 	"errors"
@@ -7,7 +7,7 @@ import (
 
 var (
 	// DefaultRouter is the global default router
-	DefaultRouter Router = NewRouter()
+	DefaultRouter = NewRouter()
 	// DefaultNetwork is default micro network
 	DefaultNetwork = "micro"
 	// ErrRouteNotFound is returned when no route was found in the routing table

selector/random/random.go

@@ -1,4 +1,4 @@
-package random // import "go.unistack.org/micro/v3/selector/random"
+package random
 
 import (
 	"go.unistack.org/micro/v3/selector"
@@ -25,7 +25,7 @@ func (r *random) Select(routes []string, opts ...selector.SelectOption) (selecto
 	}, nil
 }
 
-func (r *random) Record(addr string, err error) error {
+func (r *random) Record(_ string, _ error) error {
 	return nil
 }
 

selector/roundrobin/roundrobin.go

@@ -1,4 +1,4 @@
-package roundrobin // import "go.unistack.org/micro/v3/selector/roundrobin"
+package roundrobin
 
 import (
 	"go.unistack.org/micro/v3/selector"
@@ -6,14 +6,14 @@ import (
 )
 
 // NewSelector returns an initialised round robin selector
-func NewSelector(opts ...selector.Option) selector.Selector {
+func NewSelector(_ ...selector.Option) selector.Selector {
 	return new(roundrobin)
 }
 
 type roundrobin struct{}
 
 // Select return routes based on algo
-func (r *roundrobin) Select(routes []string, opts ...selector.SelectOption) (selector.Next, error) {
+func (r *roundrobin) Select(routes []string, _ ...selector.SelectOption) (selector.Next, error) {
 	if len(routes) == 0 {
 		return nil, selector.ErrNoneAvailable
 	}
@@ -28,7 +28,7 @@ func (r *roundrobin) Select(routes []string, opts ...selector.SelectOption) (sel
 	}, nil
 }
 
-func (r *roundrobin) Record(addr string, err error) error { return nil }
+func (r *roundrobin) Record(_ string, _ error) error { return nil }
 
 func (r *roundrobin) Reset() error { return nil }
 

selector/selector.go

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

semconv/broker.go

@@ -2,21 +2,21 @@ package semconv
 
 var (
 	// PublishMessageDurationSeconds specifies meter metric name
-	PublishMessageDurationSeconds = "publish_message_duration_seconds"
+	PublishMessageDurationSeconds = "micro_publish_message_duration_seconds"
 	// PublishMessageLatencyMicroseconds specifies meter metric name
-	PublishMessageLatencyMicroseconds = "publish_message_latency_microseconds"
+	PublishMessageLatencyMicroseconds = "micro_publish_message_latency_microseconds"
 	// PublishMessageTotal specifies meter metric name
-	PublishMessageTotal = "publish_message_total"
+	PublishMessageTotal = "micro_publish_message_total"
 	// PublishMessageInflight specifies meter metric name
-	PublishMessageInflight = "publish_message_inflight"
+	PublishMessageInflight = "micro_publish_message_inflight"
 	// SubscribeMessageDurationSeconds specifies meter metric name
-	SubscribeMessageDurationSeconds = "subscribe_message_duration_seconds"
+	SubscribeMessageDurationSeconds = "micro_subscribe_message_duration_seconds"
 	// SubscribeMessageLatencyMicroseconds specifies meter metric name
-	SubscribeMessageLatencyMicroseconds = "subscribe_message_latency_microseconds"
+	SubscribeMessageLatencyMicroseconds = "micro_subscribe_message_latency_microseconds"
 	// SubscribeMessageTotal specifies meter metric name
-	SubscribeMessageTotal = "subscribe_message_total"
+	SubscribeMessageTotal = "micro_subscribe_message_total"
 	// SubscribeMessageInflight specifies meter metric name
-	SubscribeMessageInflight = "subscribe_message_inflight"
+	SubscribeMessageInflight = "micro_subscribe_message_inflight"
 	// BrokerGroupLag specifies broker lag
-	BrokerGroupLag = "broker_group_lag"
+	BrokerGroupLag = "micro_broker_group_lag"
 )

semconv/cache.go

@@ -2,11 +2,13 @@ package semconv
 
 var (
 	// CacheRequestDurationSeconds specifies meter metric name
-	CacheRequestDurationSeconds = "cache_request_duration_seconds"
-	// ClientRequestLatencyMicroseconds specifies meter metric name
-	CacheRequestLatencyMicroseconds = "cache_request_latency_microseconds"
+	CacheRequestDurationSeconds = "micro_cache_request_duration_seconds"
+	// CacheRequestLatencyMicroseconds specifies meter metric name
+	CacheRequestLatencyMicroseconds = "micro_cache_request_latency_microseconds"
 	// CacheRequestTotal specifies meter metric name
-	CacheRequestTotal = "cache_request_total"
+	CacheRequestTotal = "micro_cache_request_total"
 	// CacheRequestInflight specifies meter metric name
-	CacheRequestInflight = "cache_request_inflight"
+	CacheRequestInflight = "micro_cache_request_inflight"
+	// CacheItemsTotal specifies total cache items
+	CacheItemsTotal = "micro_cache_items_total"
 )

semconv/client.go

@@ -2,11 +2,11 @@ package semconv
 
 var (
 	// ClientRequestDurationSeconds specifies meter metric name
-	ClientRequestDurationSeconds = "client_request_duration_seconds"
+	ClientRequestDurationSeconds = "micro_client_request_duration_seconds"
 	// ClientRequestLatencyMicroseconds specifies meter metric name
-	ClientRequestLatencyMicroseconds = "client_request_latency_microseconds"
+	ClientRequestLatencyMicroseconds = "micro_client_request_latency_microseconds"
 	// ClientRequestTotal specifies meter metric name
-	ClientRequestTotal = "client_request_total"
+	ClientRequestTotal = "micro_client_request_total"
 	// ClientRequestInflight specifies meter metric name
-	ClientRequestInflight = "client_request_inflight"
+	ClientRequestInflight = "micro_client_request_inflight"
 )

semconv/logger.go

@@ -0,0 +1,4 @@
+package semconv
+
+// LoggerMessageTotal specifies meter metric name for logger messages
+var LoggerMessageTotal = "micro_logger_message_total"

semconv/pool.go

@@ -0,0 +1,12 @@
+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"
+)

semconv/server.go

@@ -2,11 +2,11 @@ package semconv
 
 var (
 	// ServerRequestDurationSeconds specifies meter metric name
-	ServerRequestDurationSeconds = "server_request_duration_seconds"
+	ServerRequestDurationSeconds = "micro_server_request_duration_seconds"
 	// ServerRequestLatencyMicroseconds specifies meter metric name
-	ServerRequestLatencyMicroseconds = "server_request_latency_microseconds"
+	ServerRequestLatencyMicroseconds = "micro_server_request_latency_microseconds"
 	// ServerRequestTotal specifies meter metric name
-	ServerRequestTotal = "server_request_total"
+	ServerRequestTotal = "micro_server_request_total"
 	// ServerRequestInflight specifies meter metric name
-	ServerRequestInflight = "server_request_inflight"
+	ServerRequestInflight = "micro_server_request_inflight"
 )

semconv/store.go

@@ -0,0 +1,12 @@
+package semconv
+
+var (
+	// StoreRequestDurationSeconds specifies meter metric name
+	StoreRequestDurationSeconds = "micro_store_request_duration_seconds"
+	// StoreRequestLatencyMicroseconds 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"
+)

server/noop.go

@@ -1,7 +1,6 @@
 package server
 
 import (
-	"bytes"
 	"context"
 	"fmt"
 	"reflect"
@@ -122,6 +121,18 @@ func (n *noopServer) newCodec(contentType string) (codec.Codec, error) {
 	return nil, codec.ErrUnknownContentType
 }
 
+func (n *noopServer) Live() bool {
+	return true
+}
+
+func (n *noopServer) Ready() bool {
+	return true
+}
+
+func (n *noopServer) Health() bool {
+	return true
+}
+
 func (n *noopServer) Handle(handler Handler) error {
 	n.h = handler
 	return nil
@@ -160,7 +171,6 @@ type rpcMessage struct {
 	header      metadata.Metadata
 	topic       string
 	contentType string
-	body        []byte
 }
 
 func (r *rpcMessage) ContentType() string {
@@ -460,7 +470,7 @@ func (n *noopServer) Start() error {
 					}
 				} else if rerr != nil && !registered {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Errorf(n.opts.Context, fmt.Sprintf("server %s-%s register check error", config.Name, config.ID), rerr)
+						config.Logger.Error(n.opts.Context, fmt.Sprintf("server %s-%s register check error", config.Name, config.ID), rerr)
 					}
 					continue
 				}
@@ -691,7 +701,7 @@ func (n *noopServer) createSubHandler(sb *subscriber, opts Options) broker.Handl
 				req = req.Elem()
 			}
 
-			if err = cf.ReadBody(bytes.NewBuffer(msg.Body), req.Interface()); err != nil {
+			if err = cf.Unmarshal(msg.Body, req.Interface()); err != nil {
 				return err
 			}
 
@@ -765,13 +775,16 @@ func (s *subscriber) Options() SubscriberOptions {
 }
 
 type subscriber struct {
+	topic string
+
 	typ        reflect.Type
 	subscriber interface{}
-	topic      string
-	endpoints  []*register.Endpoint
-	handlers   []*handler
-	opts       SubscriberOptions
-	rcvr       reflect.Value
+
+	endpoints []*register.Endpoint
+	handlers  []*handler
+
+	rcvr reflect.Value
+	opts SubscriberOptions
 }
 
 type handler struct {

server/noop_test.go

@@ -38,7 +38,9 @@ func TestNoopSub(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	logger.DefaultLogger.Init(logger.WithLevel(logger.ErrorLevel))
+	if err := logger.DefaultLogger.Init(logger.WithLevel(logger.ErrorLevel)); err != nil {
+		t.Fatal(err)
+	}
 	s := server.NewServer(
 		server.Broker(b),
 		server.Codec("application/octet-stream", codec.NewCodec()),

server/options.go

@@ -12,7 +12,6 @@ import (
 	"go.unistack.org/micro/v3/logger"
 	"go.unistack.org/micro/v3/metadata"
 	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/network/transport"
 	"go.unistack.org/micro/v3/options"
 	"go.unistack.org/micro/v3/register"
 	msync "go.unistack.org/micro/v3/sync"
@@ -25,38 +24,11 @@ type Option func(*Options)
 
 // Options server struct
 type Options struct {
-	// Context holds the external options and can be used for server shutdown
-	Context context.Context
-	// Broker holds the server broker
-	Broker broker.Broker
-	// Register holds the register
-	Register register.Register
-	// Tracer holds the tracer
-	Tracer tracer.Tracer
-	// Logger holds the logger
-	Logger logger.Logger
-	// Meter holds the meter
-	Meter meter.Meter
-	// Transport holds the transport
-	Transport transport.Transport
-
-	/*
-		// Router for requests
-		Router Router
-	*/
-
-	// Listener may be passed if already created
-	Listener net.Listener
-	// Wait group
-	Wait *msync.WaitGroup
-	// TLSConfig specifies tls.Config for secure serving
-	TLSConfig *tls.Config
-	// Metadata holds the server metadata
-	Metadata metadata.Metadata
-	// RegisterCheck run before register server
-	RegisterCheck func(context.Context) error
 	// Codecs map to handle content-type
 	Codecs map[string]codec.Codec
+	// Metadata holds the server metadata
+	Metadata metadata.Metadata
+
 	// ID holds the id of the server
 	ID string
 	// Namespace for te server
@@ -69,21 +41,46 @@ type Options struct {
 	Advertise string
 	// Version holds the server version
 	Version string
-	// RegisterAttempts holds the number of register attempts before error
-	RegisterAttempts int
+
+	// Context holds the external options and can be used for server shutdown
+	Context context.Context
+	// Broker holds the server broker
+	Broker broker.Broker
+	// Register holds the register
+	Register register.Register
+	// Tracer holds the tracer
+	Tracer tracer.Tracer
+	// Logger holds the logger
+	Logger logger.Logger
+	// Meter holds the meter
+	Meter meter.Meter
+	// Listener may be passed if already created
+	Listener net.Listener
+
+	// TLSConfig specifies tls.Config for secure serving
+	TLSConfig *tls.Config
+	// Wait group
+	Wait *msync.WaitGroup
+
+	// RegisterCheck run before register server
+	RegisterCheck func(context.Context) error
+
+	// Hooks may contains hook actions that performs before/after server handler
+	// or server subscriber handler
+	Hooks options.Hooks
+
 	// RegisterInterval holds he interval for re-register
 	RegisterInterval time.Duration
 	// RegisterTTL specifies TTL for register record
 	RegisterTTL time.Duration
+	// GracefulTimeout timeout for graceful stop server
+	GracefulTimeout time.Duration
 	// MaxConn limits number of connections
 	MaxConn int
 	// DeregisterAttempts holds the number of deregister attempts before error
 	DeregisterAttempts int
-	// Hooks may contains hook actions that performs before/after server handler
-	// or server subscriber handler
-	Hooks options.Hooks
-	// GracefulTimeout timeout for graceful stop server
-	GracefulTimeout time.Duration
+	// RegisterAttempts holds the number of register attempts before error
+	RegisterAttempts int
 }
 
 // NewOptions returns new options struct with default or passed values
@@ -100,7 +97,6 @@ func NewOptions(opts ...Option) Options {
 		Tracer:           tracer.DefaultTracer,
 		Broker:           broker.DefaultBroker,
 		Register:         register.DefaultRegister,
-		Transport:        transport.DefaultTransport,
 		Address:          DefaultAddress,
 		Name:             DefaultName,
 		Version:          DefaultVersion,
@@ -209,13 +205,6 @@ func Tracer(t tracer.Tracer) Option {
 	}
 }
 
-// Transport mechanism for communication e.g http, rabbitmq, etc
-func Transport(t transport.Transport) Option {
-	return func(o *Options) {
-		o.Transport = t
-	}
-}
-
 // Metadata associated with the server
 func Metadata(md metadata.Metadata) Option {
 	return func(o *Options) {
@@ -249,14 +238,6 @@ func TLSConfig(t *tls.Config) Option {
 	return func(o *Options) {
 		// set the internal tls
 		o.TLSConfig = t
-
-		// set the default transport if one is not
-		// already set. Required for Init call below.
-
-		// set the transport tls
-		_ = o.Transport.Init(
-			transport.TLSConfig(t),
-		)
 	}
 }
 
@@ -337,14 +318,14 @@ type SubscriberOptions struct {
 	Context context.Context
 	// Queue holds the subscription queue
 	Queue string
+	// BatchWait flag specifies max wait time for batch filling
+	BatchWait time.Duration
+	// BatchSize flag specifies max size of batch
+	BatchSize int
 	// AutoAck flag for auto ack messages after processing
 	AutoAck bool
 	// BodyOnly flag specifies that message without headers
 	BodyOnly bool
-	// BatchSize flag specifies max size of batch
-	BatchSize int
-	// BatchWait flag specifies max wait time for batch filling
-	BatchWait time.Duration
 }
 
 // NewSubscriberOptions create new SubscriberOptions

server/server.go

@@ -1,5 +1,5 @@
 // Package server is an interface for a micro server
-package server // import "go.unistack.org/micro/v3/server"
+package server
 
 import (
 	"context"
@@ -11,7 +11,9 @@ import (
 )
 
 // DefaultServer default server
-var DefaultServer Server = NewServer()
+var (
+	DefaultServer = NewServer()
+)
 
 var (
 	// DefaultAddress will be used if no address passed, use secure localhost
@@ -60,6 +62,12 @@ type Server interface {
 	Stop() error
 	// Server implementation
 	String() string
+	// Live returns server liveness
+	Live() bool
+	// Ready returns server readiness
+	Ready() bool
+	// Health returns server health
+	Health() bool
 }
 
 type (

service.go

@@ -1,10 +1,14 @@
 // Package micro is a pluggable framework for microservices
-package micro // import "go.unistack.org/micro/v3"
+package micro
 
 import (
 	"fmt"
+	"net"
 	"sync"
+	"time"
 
+	"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"
@@ -15,8 +19,27 @@ import (
 	"go.unistack.org/micro/v3/server"
 	"go.unistack.org/micro/v3/store"
 	"go.unistack.org/micro/v3/tracer"
+	utildns "go.unistack.org/micro/v3/util/dns"
 )
 
+func init() {
+	_, _ = maxprocs.Set()
+	_, _ = memlimit.SetGoMemLimitWithOpts(
+		memlimit.WithRatio(0.9),
+		memlimit.WithProvider(
+			memlimit.ApplyFallback(
+				memlimit.FromCgroup,
+				memlimit.FromSystem,
+			),
+		),
+	)
+
+	net.DefaultResolver = utildns.NewNetResolver(
+		utildns.Timeout(1*time.Second),
+		utildns.MinCacheTTL(5*time.Second),
+	)
+}
+
 // Service is an interface that wraps the lower level components.
 // Its works as container with building blocks for service.
 type Service interface {
@@ -57,8 +80,14 @@ type Service interface {
 	Start() error
 	// Stop the service
 	Stop() error
-	// The service implementation
+	// String service representation
 	String() string
+	// Live returns service liveness
+	Live() bool
+	// Ready returns service readiness
+	Ready() bool
+	// Health returns service health
+	Health() bool
 }
 
 // RegisterHandler is syntactic sugar for registering a handler
@@ -72,22 +101,21 @@ 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...)}
+	return &service{opts: NewOptions(opts...), done: make(chan struct{})}
 }
 
 func (s *service) Name() string {
 	return s.opts.Name
 }
 
-// Init initialises options. Additionally it calls cmd.Init
-// which parses command line flags. cmd.Init is only called
-// on first Init.
+// Init initialises options.
 //
 //nolint:gocyclo
 func (s *service) Init(opts ...Option) error {
@@ -236,6 +264,63 @@ func (s *service) String() string {
 	return s.opts.Name
 }
 
+func (s *service) Live() bool {
+	for _, v := range s.opts.Brokers {
+		if !v.Live() {
+			return false
+		}
+	}
+	for _, v := range s.opts.Servers {
+		if !v.Live() {
+			return false
+		}
+	}
+	for _, v := range s.opts.Stores {
+		if !v.Live() {
+			return false
+		}
+	}
+	return true
+}
+
+func (s *service) Ready() bool {
+	for _, v := range s.opts.Brokers {
+		if !v.Ready() {
+			return false
+		}
+	}
+	for _, v := range s.opts.Servers {
+		if !v.Ready() {
+			return false
+		}
+	}
+	for _, v := range s.opts.Stores {
+		if !v.Ready() {
+			return false
+		}
+	}
+	return true
+}
+
+func (s *service) Health() bool {
+	for _, v := range s.opts.Brokers {
+		if !v.Health() {
+			return false
+		}
+	}
+	for _, v := range s.opts.Servers {
+		if !v.Health() {
+			return false
+		}
+	}
+	for _, v := range s.opts.Stores {
+		if !v.Health() {
+			return false
+		}
+	}
+	return true
+}
+
 //nolint:gocyclo
 func (s *service) Start() error {
 	var err error
@@ -262,11 +347,7 @@ func (s *service) Start() error {
 	}
 
 	if config.Loggers[0].V(logger.InfoLevel) {
-		config.Loggers[0].Infof(s.opts.Context, "starting [service] %s version %s", s.Options().Name, s.Options().Version)
-	}
-
-	if len(s.opts.Servers) == 0 {
-		return fmt.Errorf("cant start nil server")
+		config.Loggers[0].Info(s.opts.Context, fmt.Sprintf("starting [service] %s version %s", s.Options().Name, s.Options().Version))
 	}
 
 	for _, reg := range s.opts.Registers {
@@ -308,7 +389,7 @@ func (s *service) Stop() error {
 	s.RUnlock()
 
 	if config.Loggers[0].V(logger.InfoLevel) {
-		config.Loggers[0].Infof(s.opts.Context, "stoppping [service] %s", s.Name())
+		config.Loggers[0].Info(s.opts.Context, fmt.Sprintf("stoppping [service] %s", s.Name()))
 	}
 
 	var err error
@@ -348,6 +429,8 @@ func (s *service) Stop() error {
 		}
 	}
 
+	close(s.done)
+
 	return nil
 }
 
@@ -371,7 +454,7 @@ func (s *service) Run() error {
 	}
 
 	// wait on context cancel
-	<-s.opts.Context.Done()
+	<-s.done
 
 	return s.Stop()
 }

service_test.go

@@ -121,8 +121,10 @@ func TestNewService(t *testing.T) {
 	}
 	tests := []struct {
 		name string
-		args args
+
 		want Service
+
+		args args
 	}{
 		{
 			name: "NewService",
@@ -134,7 +136,7 @@ func TestNewService(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			if got := NewService(tt.args.opts...); !reflect.DeepEqual(got, tt.want) {
+			if got := NewService(tt.args.opts...); got.Name() != tt.want.Name() {
 				t.Errorf("NewService() = %v, want %v", got.Options().Name, tt.want.Options().Name)
 			}
 		})
@@ -146,9 +148,10 @@ func Test_service_Name(t *testing.T) {
 		opts Options
 	}
 	tests := []struct {
-		name   string
+		name string
+		want string
+
 		fields fields
-		want   string
 	}{
 		{
 			name: "Test_service_Name",
@@ -245,10 +248,12 @@ func Test_service_Broker(t *testing.T) {
 		names []string
 	}
 	tests := []struct {
-		name   string
+		name string
+
+		want broker.Broker
+
 		fields fields
 		args   args
-		want   broker.Broker
 	}{
 		{
 			name: "service.Broker",
@@ -301,10 +306,12 @@ func Test_service_Tracer(t *testing.T) {
 		names []string
 	}
 	tests := []struct {
-		name   string
+		name string
+
+		want tracer.Tracer
+
 		fields fields
 		args   args
-		want   tracer.Tracer
 	}{
 		{
 			name: "service.Tracer",
@@ -338,10 +345,11 @@ func Test_service_Config(t *testing.T) {
 		names []string
 	}
 	tests := []struct {
-		name   string
+		name string
+		want config.Config
+
 		fields fields
 		args   args
-		want   config.Config
 	}{
 		{
 			name: "service.Config",
@@ -375,10 +383,12 @@ func Test_service_Client(t *testing.T) {
 		names []string
 	}
 	tests := []struct {
-		name   string
+		name string
+
+		want client.Client
+
 		fields fields
 		args   args
-		want   client.Client
 	}{
 		{
 			name: "service.Client",
@@ -412,10 +422,12 @@ func Test_service_Server(t *testing.T) {
 		names []string
 	}
 	tests := []struct {
-		name   string
+		name string
+
+		want server.Server
+
 		fields fields
 		args   args
-		want   server.Server
 	}{
 		{
 			name: "service.Server",
@@ -449,10 +461,12 @@ func Test_service_Store(t *testing.T) {
 		names []string
 	}
 	tests := []struct {
-		name   string
+		name string
+
+		want store.Store
+
 		fields fields
 		args   args
-		want   store.Store
 	}{
 		{
 			name: "service.Store",
@@ -486,10 +500,12 @@ func Test_service_Register(t *testing.T) {
 		names []string
 	}
 	tests := []struct {
-		name   string
+		name string
+
+		want register.Register
+
 		fields fields
 		args   args
-		want   register.Register
 	}{
 		{
 			name: "service.Register",
@@ -523,10 +539,12 @@ func Test_service_Logger(t *testing.T) {
 		names []string
 	}
 	tests := []struct {
-		name   string
+		name string
+
+		want logger.Logger
+
 		fields fields
 		args   args
-		want   logger.Logger
 	}{
 		{
 			name: "service.Logger",
@@ -560,10 +578,12 @@ func Test_service_Router(t *testing.T) {
 		names []string
 	}
 	tests := []struct {
-		name   string
+		name string
+
+		want router.Router
+
 		fields fields
 		args   args
-		want   router.Router
 	}{
 		{
 			name: "service.Router",
@@ -597,10 +617,12 @@ func Test_service_Meter(t *testing.T) {
 		names []string
 	}
 	tests := []struct {
-		name   string
+		name string
+
+		want meter.Meter
+
 		fields fields
 		args   args
-		want   meter.Meter
 	}{
 		{
 			name: "service.Meter",
@@ -631,8 +653,8 @@ func Test_service_String(t *testing.T) {
 	}
 	tests := []struct {
 		name   string
-		fields fields
 		want   string
+		fields fields
 	}{
 		{
 			name: "service.String",

store/memory/memory.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"sort"
 	"strings"
+	"sync/atomic"
 	"time"
 
 	cache "github.com/patrickmn/go-cache"
@@ -20,7 +21,10 @@ func NewStore(opts ...store.Option) store.Store {
 }
 
 func (m *memoryStore) Connect(ctx context.Context) error {
-	return nil
+	if m.opts.LazyConnect {
+		return nil
+	}
+	return m.connect(ctx)
 }
 
 func (m *memoryStore) Disconnect(ctx context.Context) error {
@@ -29,13 +33,14 @@ func (m *memoryStore) Disconnect(ctx context.Context) error {
 }
 
 type memoryStore struct {
-	funcRead   store.FuncRead
-	funcWrite  store.FuncWrite
-	funcExists store.FuncExists
-	funcList   store.FuncList
-	funcDelete store.FuncDelete
-	store      *cache.Cache
-	opts       store.Options
+	funcRead    store.FuncRead
+	funcWrite   store.FuncWrite
+	funcExists  store.FuncExists
+	funcList    store.FuncList
+	funcDelete  store.FuncDelete
+	store       *cache.Cache
+	opts        store.Options
+	isConnected atomic.Int32
 }
 
 func (m *memoryStore) key(prefix, key string) string {
@@ -91,15 +96,15 @@ func (m *memoryStore) list(prefix string, limit, offset uint) []string {
 	if limit != 0 || offset != 0 {
 		sort.Slice(allKeys, func(i, j int) bool { return allKeys[i] < allKeys[j] })
 		sort.Slice(allKeys, func(i, j int) bool { return allKeys[i] < allKeys[j] })
-		end := len(allKeys)
+		end := uint(len(allKeys))
 		if limit > 0 {
-			calcLimit := int(offset + limit)
+			calcLimit := offset + limit
 			if calcLimit < end {
 				end = calcLimit
 			}
 		}
 
-		if int(offset) >= end {
+		if offset >= end {
 			return nil
 		}
 		return allKeys[offset:end]
@@ -144,7 +149,24 @@ func (m *memoryStore) Name() string {
 	return m.opts.Name
 }
 
+func (m *memoryStore) Live() bool {
+	return true
+}
+
+func (m *memoryStore) Ready() bool {
+	return true
+}
+
+func (m *memoryStore) Health() bool {
+	return true
+}
+
 func (m *memoryStore) Exists(ctx context.Context, key string, opts ...store.ExistsOption) error {
+	if m.opts.LazyConnect {
+		if err := m.connect(ctx); err != nil {
+			return err
+		}
+	}
 	return m.funcExists(ctx, key, opts...)
 }
 
@@ -157,6 +179,11 @@ func (m *memoryStore) fnExists(ctx context.Context, key string, opts ...store.Ex
 }
 
 func (m *memoryStore) Read(ctx context.Context, key string, val interface{}, opts ...store.ReadOption) error {
+	if m.opts.LazyConnect {
+		if err := m.connect(ctx); err != nil {
+			return err
+		}
+	}
 	return m.funcRead(ctx, key, val, opts...)
 }
 
@@ -169,6 +196,11 @@ func (m *memoryStore) fnRead(ctx context.Context, key string, val interface{}, o
 }
 
 func (m *memoryStore) Write(ctx context.Context, key string, val interface{}, opts ...store.WriteOption) error {
+	if m.opts.LazyConnect {
+		if err := m.connect(ctx); err != nil {
+			return err
+		}
+	}
 	return m.funcWrite(ctx, key, val, opts...)
 }
 
@@ -193,6 +225,11 @@ func (m *memoryStore) fnWrite(ctx context.Context, key string, val interface{},
 }
 
 func (m *memoryStore) Delete(ctx context.Context, key string, opts ...store.DeleteOption) error {
+	if m.opts.LazyConnect {
+		if err := m.connect(ctx); err != nil {
+			return err
+		}
+	}
 	return m.funcDelete(ctx, key, opts...)
 }
 
@@ -211,6 +248,11 @@ func (m *memoryStore) Options() store.Options {
 }
 
 func (m *memoryStore) List(ctx context.Context, opts ...store.ListOption) ([]string, error) {
+	if m.opts.LazyConnect {
+		if err := m.connect(ctx); err != nil {
+			return nil, err
+		}
+	}
 	return m.funcList(ctx, opts...)
 }
 
@@ -244,3 +286,21 @@ func (m *memoryStore) fnList(ctx context.Context, opts ...store.ListOption) ([]s
 
 	return keys, nil
 }
+
+func (m *memoryStore) connect(ctx context.Context) error {
+	m.isConnected.CompareAndSwap(0, 1)
+	return nil
+}
+
+func (m *memoryStore) Watch(ctx context.Context, opts ...store.WatchOption) (store.Watcher, error) {
+	return &watcher{}, nil
+}
+
+type watcher struct{}
+
+func (w *watcher) Next() (store.Event, error) {
+	return nil, nil
+}
+
+func (w *watcher) Stop() {
+}

store/noop.go

@@ -2,22 +2,43 @@ package store
 
 import (
 	"context"
+	"sync"
+	"sync/atomic"
 
 	"go.unistack.org/micro/v3/options"
+	"go.unistack.org/micro/v3/util/id"
 )
 
 var _ Store = (*noopStore)(nil)
 
 type noopStore struct {
+	watchers map[string]Watcher
+
 	funcRead   FuncRead
 	funcWrite  FuncWrite
 	funcExists FuncExists
 	funcList   FuncList
 	funcDelete FuncDelete
-	opts       Options
+
+	opts        Options
+	isConnected atomic.Int32
+
+	mu sync.Mutex
 }
 
-func NewStore(opts ...Option) *noopStore {
+func (n *noopStore) Live() bool {
+	return true
+}
+
+func (n *noopStore) Ready() bool {
+	return true
+}
+
+func (n *noopStore) Health() bool {
+	return true
+}
+
+func NewStore(opts ...Option) Store {
 	options := NewOptions(opts...)
 	return &noopStore{opts: options}
 }
@@ -52,12 +73,10 @@ func (n *noopStore) Init(opts ...Option) error {
 }
 
 func (n *noopStore) Connect(ctx context.Context) error {
-	select {
-	case <-ctx.Done():
-		return ctx.Err()
-	default:
+	if n.opts.LazyConnect {
+		return nil
 	}
-	return nil
+	return n.connect(ctx)
 }
 
 func (n *noopStore) Disconnect(ctx context.Context) error {
@@ -70,10 +89,15 @@ func (n *noopStore) Disconnect(ctx context.Context) error {
 }
 
 func (n *noopStore) Read(ctx context.Context, key string, val interface{}, opts ...ReadOption) error {
+	if n.opts.LazyConnect {
+		if err := n.connect(ctx); err != nil {
+			return err
+		}
+	}
 	return n.funcRead(ctx, key, val, opts...)
 }
 
-func (n *noopStore) fnRead(ctx context.Context, key string, val interface{}, opts ...ReadOption) error {
+func (n *noopStore) fnRead(ctx context.Context, _ string, _ interface{}, _ ...ReadOption) error {
 	select {
 	case <-ctx.Done():
 		return ctx.Err()
@@ -83,10 +107,15 @@ func (n *noopStore) fnRead(ctx context.Context, key string, val interface{}, opt
 }
 
 func (n *noopStore) Delete(ctx context.Context, key string, opts ...DeleteOption) error {
+	if n.opts.LazyConnect {
+		if err := n.connect(ctx); err != nil {
+			return err
+		}
+	}
 	return n.funcDelete(ctx, key, opts...)
 }
 
-func (n *noopStore) fnDelete(ctx context.Context, key string, opts ...DeleteOption) error {
+func (n *noopStore) fnDelete(ctx context.Context, _ string, _ ...DeleteOption) error {
 	select {
 	case <-ctx.Done():
 		return ctx.Err()
@@ -96,10 +125,15 @@ func (n *noopStore) fnDelete(ctx context.Context, key string, opts ...DeleteOpti
 }
 
 func (n *noopStore) Exists(ctx context.Context, key string, opts ...ExistsOption) error {
+	if n.opts.LazyConnect {
+		if err := n.connect(ctx); err != nil {
+			return err
+		}
+	}
 	return n.funcExists(ctx, key, opts...)
 }
 
-func (n *noopStore) fnExists(ctx context.Context, key string, opts ...ExistsOption) error {
+func (n *noopStore) fnExists(ctx context.Context, _ string, _ ...ExistsOption) error {
 	select {
 	case <-ctx.Done():
 		return ctx.Err()
@@ -109,10 +143,15 @@ func (n *noopStore) fnExists(ctx context.Context, key string, opts ...ExistsOpti
 }
 
 func (n *noopStore) Write(ctx context.Context, key string, val interface{}, opts ...WriteOption) error {
+	if n.opts.LazyConnect {
+		if err := n.connect(ctx); err != nil {
+			return err
+		}
+	}
 	return n.funcWrite(ctx, key, val, opts...)
 }
 
-func (n *noopStore) fnWrite(ctx context.Context, key string, val interface{}, opts ...WriteOption) error {
+func (n *noopStore) fnWrite(ctx context.Context, _ string, _ interface{}, _ ...WriteOption) error {
 	select {
 	case <-ctx.Done():
 		return ctx.Err()
@@ -122,6 +161,11 @@ func (n *noopStore) fnWrite(ctx context.Context, key string, val interface{}, op
 }
 
 func (n *noopStore) List(ctx context.Context, opts ...ListOption) ([]string, error) {
+	if n.opts.LazyConnect {
+		if err := n.connect(ctx); err != nil {
+			return nil, err
+		}
+	}
 	return n.funcList(ctx, opts...)
 }
 
@@ -145,3 +189,53 @@ func (n *noopStore) String() string {
 func (n *noopStore) Options() Options {
 	return n.opts
 }
+
+func (n *noopStore) connect(ctx context.Context) error {
+	if n.isConnected.CompareAndSwap(0, 1) {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		default:
+		}
+	}
+
+	return nil
+}
+
+type watcher struct {
+	opts WatchOptions
+	ch   chan Event
+	exit chan bool
+	id   string
+}
+
+func (n *noopStore) Watch(_ context.Context, opts ...WatchOption) (Watcher, error) {
+	id, err := id.New()
+	if err != nil {
+		return nil, err
+	}
+	wo, err := NewWatchOptions(opts...)
+	if err != nil {
+		return nil, err
+	}
+	// construct the watcher
+	w := &watcher{
+		exit: make(chan bool),
+		ch:   make(chan Event),
+		id:   id,
+		opts: wo,
+	}
+
+	n.mu.Lock()
+	n.watchers[w.id] = w
+	n.mu.Unlock()
+
+	return w, nil
+}
+
+func (w *watcher) Next() (Event, error) {
+	return nil, nil
+}
+
+func (w *watcher) Stop() {
+}

store/options.go

@@ -15,6 +15,13 @@ import (
 
 // Options contains configuration for the Store
 type Options struct {
+	// Name specifies store name
+	Name string
+	// Namespace of the records
+	Namespace string
+	// Separator used as key parts separator
+	Separator string
+
 	// Meter used for metrics
 	Meter meter.Meter
 	// Tracer used for tracing
@@ -25,22 +32,19 @@ type Options struct {
 	Codec codec.Codec
 	// Logger used for logging
 	Logger logger.Logger
+
 	// TLSConfig holds tls.TLSConfig options
 	TLSConfig *tls.Config
-	// Name specifies store name
-	Name string
-	// Namespace of the records
-	Namespace string
-	// Separator used as key parts separator
-	Separator string
+
 	// Addrs contains store address
 	Addrs []string
-	// Wrappers store wrapper that called before actual functions
-	// Wrappers []Wrapper
-	// Timeout specifies timeout duration for all operations
-	Timeout time.Duration
 	// Hooks can be run before/after store Read/List/Write/Exists/Delete
 	Hooks options.Hooks
+
+	// Timeout specifies timeout duration for all operations
+	Timeout time.Duration
+	// LazyConnect creates a connection when using store
+	LazyConnect bool
 }
 
 // NewOptions creates options struct
@@ -132,6 +136,13 @@ func Timeout(td time.Duration) Option {
 	}
 }
 
+// LazyConnect initialize connection only when needed
+func LazyConnect(b bool) Option {
+	return func(o *Options) {
+		o.LazyConnect = b
+	}
+}
+
 // Addrs contains the addresses or other connection information of the backing storage.
 // For example, an etcd implementation would contain the nodes of the cluster.
 // A SQL implementation could contain one or more connection strings.

store/store.go

@@ -1,18 +1,22 @@
 // Package store is an interface for distributed data storage.
-package store // import "go.unistack.org/micro/v3/store"
+package store
 
 import (
 	"context"
 	"errors"
+	"time"
 )
 
 var (
+	ErrWatcherStopped = errors.New("watcher stopped")
+	// ErrNotConnected is returned when a store is not connected
+	ErrNotConnected = errors.New("not connected")
 	// 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
 	ErrInvalidKey = errors.New("invalid key")
 	// DefaultStore is the global default store
-	DefaultStore Store = NewStore()
+	DefaultStore = NewStore()
 	// DefaultSeparator is the gloabal default key parts separator
 	DefaultSeparator = "/"
 )
@@ -41,6 +45,14 @@ type Store interface {
 	Disconnect(ctx context.Context) error
 	// String returns the name of the implementation.
 	String() string
+	// Watch returns events watcher
+	Watch(ctx context.Context, opts ...WatchOption) (Watcher, error)
+	// Live returns store liveness
+	Live() bool
+	// Ready returns store readiness
+	Ready() bool
+	// Health returns store health
+	Health() bool
 }
 
 type (
@@ -55,3 +67,45 @@ type (
 	FuncList   func(ctx context.Context, opts ...ListOption) ([]string, error)
 	HookList   func(next FuncList) FuncList
 )
+
+type EventType int
+
+const (
+	EventTypeUnknown = iota
+	EventTypeConnect
+	EventTypeDisconnect
+	EventTypeOpError
+)
+
+type Event interface {
+	Timestamp() time.Time
+	Error() error
+	Type() EventType
+}
+
+type Watcher interface {
+	// Next is a blocking call
+	Next() (Event, error)
+	// Stop stops the watcher
+	Stop()
+}
+
+type WatchOption func(*WatchOptions) error
+
+type WatchOptions struct{}
+
+func NewWatchOptions(opts ...WatchOption) (WatchOptions, error) {
+	options := WatchOptions{}
+	var err error
+	for _, o := range opts {
+		if err = o(&options); err != nil {
+			break
+		}
+	}
+
+	return options, err
+}
+
+func Watch(context.Context) (Watcher, error) {
+	return nil, nil
+}

store/wrapper.go

@@ -67,16 +67,18 @@ func (w *NamespaceStore) String() string {
 	return w.s.String()
 }
 
-// type NamespaceWrapper struct{}
-
-// func NewNamespaceWrapper() Wrapper {
-//	return &NamespaceWrapper{}
-// }
-
-/*
-func (w *OmitWrapper) Logf(fn LogfFunc) LogfFunc {
-	return func(ctx context.Context, level Level, msg string, args ...interface{}) {
-		fn(ctx, level, msg, getArgs(args)...)
-	}
+func (w *NamespaceStore) Watch(ctx context.Context, opts ...WatchOption) (Watcher, error) {
+	return w.s.Watch(ctx, opts...)
+}
+
+func (w *NamespaceStore) Live() bool {
+	return w.s.Live()
+}
+
+func (w *NamespaceStore) Ready() bool {
+	return w.s.Ready()
+}
+
+func (w *NamespaceStore) Health() bool {
+	return w.s.Health()
 }
-*/

sync/memory.go

@@ -6,9 +6,10 @@ import (
 )
 
 type memorySync struct {
-	mtx     gosync.RWMutex
 	locks   map[string]*memoryLock
 	options Options
+
+	mtx gosync.RWMutex
 }
 
 type memoryLock struct {

sync/sync.go

@@ -1,5 +1,5 @@
 // Package sync is an interface for distributed synchronization
-package sync // import "go.unistack.org/micro/v3/sync"
+package sync
 
 import (
 	"errors"

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

tracer/options.go

@@ -83,8 +83,11 @@ func (sk SpanKind) String() string {
 
 // SpanOptions contains span option
 type SpanOptions struct {
-	Labels []interface{}
-	Kind   SpanKind
+	StatusMsg string
+	Labels    []interface{}
+	Status    SpanStatus
+	Kind      SpanKind
+	Record    bool
 }
 
 // SpanOption func signature
@@ -110,12 +113,25 @@ 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
@@ -124,6 +140,8 @@ type Options struct {
 	Logger logger.Logger
 	// Name of the tracer
 	Name string
+	// ContextAttrFuncs contains funcs that provides tracing
+	ContextAttrFuncs []ContextAttrFunc
 }
 
 // Option func signature
@@ -148,7 +166,8 @@ func NewEventOptions(opts ...EventOption) EventOptions {
 // NewSpanOptions returns default SpanOptions
 func NewSpanOptions(opts ...SpanOption) SpanOptions {
 	options := SpanOptions{
-		Kind: SpanKindInternal,
+		Kind:   SpanKindInternal,
+		Record: true,
 	}
 	for _, o := range opts {
 		o(&options)
@@ -159,8 +178,9 @@ func NewSpanOptions(opts ...SpanOption) SpanOptions {
 // NewOptions returns default options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Logger:  logger.DefaultLogger,
-		Context: context.Background(),
+		Logger:           logger.DefaultLogger,
+		Context:          context.Background(),
+		ContextAttrFuncs: DefaultContextAttrFuncs,
 	}
 	for _, o := range opts {
 		o(&options)

tracer/tracer.go

@@ -1,5 +1,5 @@
 // Package tracer provides an interface for distributed tracing
-package tracer // import "go.unistack.org/micro/v3/tracer"
+package tracer
 
 import (
 	"context"
@@ -21,8 +21,11 @@ var (
 		"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{} {
@@ -44,6 +47,8 @@ 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
 }

tracer/wrapper/wrapper.go

@@ -1,415 +0,0 @@
-// 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
-	}
-}

util/addr/addr.go

@@ -1,4 +1,4 @@
-package addr // import "go.unistack.org/micro/v3/util/addr"
+package addr
 
 import (
 	"fmt"
@@ -58,6 +58,7 @@ func IsLocal(addr string) bool {
 }
 
 // Extract returns a real ip
+//
 //nolint:gocyclo
 func Extract(addr string) (string, error) {
 	// if addr specified then its returned

util/backoff/backoff.go

@@ -1,5 +1,5 @@
 // Package backoff provides backoff functionality
-package backoff // import "go.unistack.org/micro/v3/util/backoff"
+package backoff
 
 import (
 	"math"

util/buf/buf.go

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