.gitea/pkgdashcli.yaml

@@ -0,0 +1,3 @@
+branches:
+  - master
+  - v3

.gitea/workflows/autoupdate.yml

@@ -0,0 +1,24 @@
+on:
+  push:
+    branches:
+    - 'main'
+    - 'master'
+    - 'v3'
+  schedule:
+    - cron: '* * * * *'
+    #- cron: '@hourly'
+
+jobs:
+  autoupdate:
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup-go
+      uses: https://gitea.com/actions/setup-go@v3
+      with:
+        go-version: 1.21
+    - name: checkout
+      uses: https://gitea.com/actions/checkout@v3
+    - name: get pkgdashcli
+      run: GOPROXY=direct GONOSUMDB="git.unistack.org/*" GONOPROXY="git.unistack.org/*" GOBIN=/bin go install git.unistack.org/unistack-org/pkgdash/cmd/pkgdashcli@latest
+    - name: pkgdashcli check
+      run: /bin/pkgdashcli check

.gitea/workflows/lint.yml

@@ -12,7 +12,7 @@ jobs:
     - name: setup-go
       uses: https://gitea.com/actions/setup-go@v3
       with:
-        go-version: 1.18
+        go-version: 1.21
     - name: checkout
       uses: https://gitea.com/actions/checkout@v3
     - name: deps

.gitea/workflows/pr.yml

@@ -14,7 +14,7 @@ jobs:
     - name: setup-go
       uses: https://gitea.com/actions/setup-go@v3
       with:
-        go-version: 1.18
+        go-version: 1.21
     - name: deps
       run: go get -v -t -d ./...
     - name: test

config/default.go

@@ -8,7 +8,7 @@ import (
 	"time"
 
 	"github.com/google/uuid"
-	"github.com/imdario/mergo"
+	"dario.cat/mergo"
 	"go.unistack.org/micro/v4/options"
 	mid "go.unistack.org/micro/v4/util/id"
 	rutil "go.unistack.org/micro/v4/util/reflect"

config/options.go

@@ -63,9 +63,9 @@ func NewOptions(opts ...options.Option) Options {
 // LoadOptions struct
 type LoadOptions struct {
 	Struct   interface{}
+	Context  context.Context
 	Override bool
 	Append   bool
-	Context  context.Context
 }
 
 // NewLoadOptions create LoadOptions struct with provided opts

go.mod

@@ -3,20 +3,20 @@ module go.unistack.org/micro/v4
 go 1.20
 
 require (
+	dario.cat/mergo v1.0.0
 	github.com/DATA-DOG/go-sqlmock v1.5.0
-	github.com/google/uuid v1.3.0
+	github.com/google/uuid v1.3.1
-	github.com/imdario/mergo v0.3.15
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5
 	golang.org/x/exp v0.0.0-20230905200255-921286631fa9
 	golang.org/x/sync v0.3.0
 	golang.org/x/sys v0.12.0
-	google.golang.org/grpc v1.57.0
+	google.golang.org/grpc v1.58.2
 	google.golang.org/protobuf v1.31.0
-
 )
 
 require (
 	github.com/golang/protobuf v1.5.3 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20230525234030-28d5490b6b19 // indirect
+	golang.org/x/net v0.15.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 // indirect
 )

go.sum

@@ -1,3 +1,5 @@
+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/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
@@ -5,27 +7,26 @@ 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/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
+github.com/google/uuid v1.3.1 h1:KjJaJ9iWZ3jOFZIf1Lqf4laDRCasjl0BCmnEGxkdLb4=
-github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.3.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/imdario/mergo v0.3.15 h1:M8XP7IuFNsqUx6VPK2P9OSmsYsI/YFaGil0uD21V3dM=
-github.com/imdario/mergo v0.3.15/go.mod h1:WBLT9ZmE3lPoWsEzCh9LPo3TiwVN+ZKEjmz+hD27ysY=
 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/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=
 golang.org/x/exp v0.0.0-20230905200255-921286631fa9 h1:GoHiUyI/Tp2nVkLI2mCxVkOjsbSXD66ic0XW0js0R9g=
 golang.org/x/exp v0.0.0-20230905200255-921286631fa9/go.mod h1:S2oDrQGGwySpoQPVqRShND87VCbxmc6bL1Yd2oYrm6k=
-golang.org/x/net v0.9.0 h1:aWJ/m6xSmxWBx+V0XRHTlrYrPG56jKsLdTFmsSsCzOM=
+golang.org/x/net v0.15.0 h1:ugBLEUaxABaB5AJqW9enI0ACdci2RUd4eP51NTBvuJ8=
+golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
 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 v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
 golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
+golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20230525234030-28d5490b6b19 h1:0nDDozoAU19Qb2HwhXadU8OcsiO/09cnTqhUtq2MEOM=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 h1:bVf09lpb+OJbByTj913DRJioFFAjf/ZGxEz7MajTp2U=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20230525234030-28d5490b6b19/go.mod h1:66JfowdXAEgad5O9NnYcsNPLCPZJD++2L9X0PCMODrA=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98/go.mod h1:TUfxEVdsvPg18p6AslUXFoLdpED4oBnGwyqk3dV1XzM=
-google.golang.org/grpc v1.57.0 h1:kfzNeI/klCGD2YPMUlaGNT3pxvYfga7smW3Vth8Zsiw=
+google.golang.org/grpc v1.58.2 h1:SXUpjxeVF3FKrTYQI4f4KvbGD5u2xccdYdurwowix5I=
-google.golang.org/grpc v1.57.0/go.mod h1:Sd+9RMTACXwmub0zcNY2c4arhtrbBYD1AUHI/dt16Mo=
+google.golang.org/grpc v1.58.2/go.mod h1:tgX3ZQDlNJGU96V6yHh1T/JeoBQ2TXdr43YbYSsCJk0=
 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=

logger/wrapper/wrapper.go

@@ -7,12 +7,13 @@ import (
 
 	"go.unistack.org/micro/v4/client"
 	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/options"
 	"go.unistack.org/micro/v4/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 {
+	DefaultClientCallObserver = func(ctx context.Context, req client.Request, rsp interface{}, opts []options.Option, err error) []string {
 		labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
 		if err != nil {
 			labels = append(labels, "error", err.Error())
@@ -21,7 +22,7 @@ var (
 	}
 
 	// DefaultClientStreamObserver called by wrapper in client Stream
-	DefaultClientStreamObserver = func(ctx context.Context, req client.Request, opts []client.CallOption, stream client.Stream, err error) []string {
+	DefaultClientStreamObserver = func(ctx context.Context, req client.Request, opts []options.Option, stream client.Stream, err error) []string {
 		labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
 		if err != nil {
 			labels = append(labels, "error", err.Error())
@@ -60,9 +61,9 @@ type lWrapper struct {
 
 type (
 	// ClientCallObserver func signature
-	ClientCallObserver func(context.Context, client.Request, interface{}, []client.CallOption, error) []string
+	ClientCallObserver func(context.Context, client.Request, interface{}, []options.Option, error) []string
 	// ClientStreamObserver func signature
-	ClientStreamObserver func(context.Context, client.Request, []client.CallOption, client.Stream, error) []string
+	ClientStreamObserver func(context.Context, client.Request, []options.Option, client.Stream, error) []string
 	// ClientCallFuncObserver func signature
 	ClientCallFuncObserver func(context.Context, string, client.Request, interface{}, client.CallOptions, error) []string
 	// ServerHandlerObserver func signature
@@ -167,7 +168,7 @@ func SkipEndpoints(eps ...string) Option {
 	}
 }
 
-func (l *lWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
+func (l *lWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...options.Option) error {
 	err := l.Client.Call(ctx, req, rsp, opts...)
 
 	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
@@ -190,7 +191,7 @@ func (l *lWrapper) Call(ctx context.Context, req client.Request, rsp interface{}
 	return err
 }
 
-func (l *lWrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
+func (l *lWrapper) Stream(ctx context.Context, req client.Request, opts ...options.Option) (client.Stream, error) {
 	stream, err := l.Client.Stream(ctx, req, opts...)
 
 	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())

meter/wrapper/wrapper.go

@@ -1,4 +1,4 @@
-package wrapper // import "go.unistack.org/micro/v4/meter/wrapper"
+package wrapper
 
 import (
 	"context"
@@ -7,6 +7,7 @@ import (
 
 	"go.unistack.org/micro/v4/client"
 	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/options"
 	"go.unistack.org/micro/v4/semconv"
 	"go.unistack.org/micro/v4/server"
 )
@@ -24,7 +25,7 @@ var (
 // Options struct
 type Options struct {
 	Meter         meter.Meter
-	lopts         []meter.Option
+	lopts         []options.Option
 	SkipEndpoints []string
 }
 
@@ -35,7 +36,7 @@ type Option func(*Options)
 func NewOptions(opts ...Option) Options {
 	options := Options{
 		Meter:         meter.DefaultMeter,
-		lopts:         make([]meter.Option, 0, 5),
+		lopts:         make([]options.Option, 0, 5),
 		SkipEndpoints: DefaultSkipEndpoints,
 	}
 	for _, o := range opts {
@@ -137,7 +138,7 @@ func (w *wrapper) CallFunc(ctx context.Context, addr string, req client.Request,
 	return err
 }
 
-func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
+func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...options.Option) error {
 	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
 	for _, ep := range w.opts.SkipEndpoints {
 		if ep == endpoint {
@@ -167,7 +168,7 @@ func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{},
 	return err
 }
 
-func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
+func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...options.Option) (client.Stream, error) {
 	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
 	for _, ep := range w.opts.SkipEndpoints {
 		if ep == endpoint {

store/memory_test.go

@@ -5,12 +5,13 @@ import (
 	"testing"
 	"time"
 
+	"go.unistack.org/micro/v4/options"
 	"go.unistack.org/micro/v4/store"
 )
 
 func TestMemoryReInit(t *testing.T) {
-	s := store.NewStore(store.Namespace("aaa"))
+	s := store.NewStore(options.Namespace("aaa"))
-	if err := s.Init(store.Namespace("")); err != nil {
+	if err := s.Init(options.Namespace("")); err != nil {
 		t.Fatal(err)
 	}
 	if len(s.Options().Namespace) > 0 {
@@ -28,7 +29,7 @@ func TestMemoryBasic(t *testing.T) {
 
 func TestMemoryPrefix(t *testing.T) {
 	s := store.NewStore()
-	if err := s.Init(store.Namespace("some-prefix")); err != nil {
+	if err := s.Init(options.Namespace("some-prefix")); err != nil {
 		t.Fatal(err)
 	}
 	basictest(s, t)
@@ -36,7 +37,7 @@ func TestMemoryPrefix(t *testing.T) {
 
 func TestMemoryNamespace(t *testing.T) {
 	s := store.NewStore()
-	if err := s.Init(store.Namespace("some-namespace")); err != nil {
+	if err := s.Init(options.Namespace("some-namespace")); err != nil {
 		t.Fatal(err)
 	}
 	basictest(s, t)
@@ -44,7 +45,7 @@ func TestMemoryNamespace(t *testing.T) {
 
 func TestMemoryNamespacePrefix(t *testing.T) {
 	s := store.NewStore()
-	if err := s.Init(store.Namespace("some-namespace")); err != nil {
+	if err := s.Init(options.Namespace("some-namespace")); err != nil {
 		t.Fatal(err)
 	}
 	basictest(s, t)

tracer/noop.go

@@ -10,18 +10,26 @@ var _ Tracer = (*noopTracer)(nil)
 
 type noopTracer struct {
 	opts  Options
+	spans []Span
+}
+
+func (t *noopTracer) Spans() []Span {
+	return t.spans
 }
 
 func (t *noopTracer) Start(ctx context.Context, name string, opts ...options.Option) (context.Context, Span) {
+	options := NewSpanOptions(opts...)
 	span := &noopSpan{
 		name:   name,
 		ctx:    ctx,
 		tracer: t,
-		opts:   NewSpanOptions(opts...),
+		labels: options.Labels,
+		kind:   options.Kind,
 	}
 	if span.ctx == nil {
 		span.ctx = context.Background()
 	}
+	t.spans = append(t.spans, span)
 	return NewSpanContext(ctx, span), span
 }
 
@@ -40,13 +48,21 @@ func (t *noopTracer) Name() string {
 	return t.opts.Name
 }
 
+type noopEvent struct {
+	name   string
+	labels []interface{}
+}
+
 type noopSpan struct {
 	ctx       context.Context
 	tracer    Tracer
 	name      string
-	opts      SpanOptions
-	status    SpanStatus
 	statusMsg string
+	events    []*noopEvent
+	labels    []interface{}
+	logs      []interface{}
+	kind      SpanKind
+	status    SpanStatus
 }
 
 func (s *noopSpan) Finish(opts ...options.Option) {
@@ -61,22 +77,24 @@ func (s *noopSpan) Tracer() Tracer {
 }
 
 func (s *noopSpan) AddEvent(name string, opts ...options.Option) {
+	options := NewEventOptions(opts...)
+	s.events = append(s.events, &noopEvent{name: name, labels: options.Labels})
 }
 
 func (s *noopSpan) SetName(name string) {
 	s.name = name
 }
 
-func (s *noopSpan) SetLabels(labels ...interface{}) {
+func (s *noopSpan) AddLogs(kv ...interface{}) {
-	s.opts.Labels = labels
+	s.logs = append(s.logs, kv...)
 }
 
-func (s *noopSpan) AddLabels(labels ...interface{}) {
+func (s *noopSpan) AddLabels(kv ...interface{}) {
-	s.opts.Labels = append(s.opts.Labels, labels...)
+	s.labels = append(s.labels, kv...)
 }
 
 func (s *noopSpan) Kind() SpanKind {
-	return s.opts.Kind
+	return s.kind
 }
 
 func (s *noopSpan) Status() (SpanStatus, string) {

tracer/options.go

@@ -159,6 +159,15 @@ func NewSpanOptions(opts ...options.Option) SpanOptions {
 	return options
 }
 
+// NewEventOptions returns default EventOptions
+func NewEventOptions(opts ...options.Option) EventOptions {
+	options := EventOptions{}
+	for _, o := range opts {
+		o(&options)
+	}
+	return options
+}
+
 // NewOptions returns default options
 func NewOptions(opts ...options.Option) Options {
 	options := Options{

tracer/tracer.go

@@ -3,6 +3,8 @@ package tracer // import "go.unistack.org/micro/v4/tracer"
 
 import (
 	"context"
+	"fmt"
+	"sort"
 
 	"go.unistack.org/micro/v4/options"
 )
@@ -27,8 +29,6 @@ type Span interface {
 	Tracer() Tracer
 	// Finish complete and send span
 	Finish(opts ...options.Option)
-	// AddEvent add event to span
-	AddEvent(name string, opts ...options.Option)
 	// Context return context with span
 	Context() context.Context
 	// SetName set the span name
@@ -37,10 +37,45 @@ type Span interface {
 	SetStatus(status SpanStatus, msg string)
 	// Status returns span status and msg
 	Status() (SpanStatus, string)
-	// SetLabels set the span labels
+	// AddLabels append labels to span
-	SetLabels(labels ...interface{})
+	AddLabels(kv ...interface{})
-	// AddLabels append the span labels
+	// AddEvent append event to span
-	AddLabels(labels ...interface{})
+	AddEvent(name string, opts ...options.Option)
+	// AddLogs append logs to span
+	AddLogs(kv ...interface{})
 	// Kind returns span kind
 	Kind() SpanKind
 }
+
+// sort labels alphabeticaly by label name
+type byKey []interface{}
+
+func (k byKey) Len() int           { return len(k) / 2 }
+func (k byKey) Less(i, j int) bool { return fmt.Sprintf("%s", k[i*2]) < fmt.Sprintf("%s", k[j*2]) }
+func (k byKey) Swap(i, j int) {
+	k[i*2], k[j*2] = k[j*2], k[i*2]
+	k[i*2+1], k[j*2+1] = k[j*2+1], k[i*2+1]
+}
+
+func UniqLabels(labels []interface{}) []interface{} {
+	if len(labels)%2 == 1 {
+		labels = labels[:len(labels)-1]
+	}
+	if len(labels) > 2 {
+		sort.Sort(byKey(labels))
+
+		idx := 0
+		for {
+			if labels[idx] == labels[idx+2] {
+				copy(labels[idx:], labels[idx+2:])
+				labels = labels[:len(labels)-2]
+			} else {
+				idx += 2
+			}
+			if idx+2 >= len(labels) {
+				break
+			}
+		}
+	}
+	return labels
+}

tracer/wrapper/wrapper.go

@@ -4,6 +4,7 @@ package wrapper // import "go.unistack.org/micro/v4/tracer/wrapper"
 import (
 	"context"
 	"fmt"
+	"strings"
 
 	"go.unistack.org/micro/v4/client"
 	"go.unistack.org/micro/v4/metadata"
@@ -14,11 +15,11 @@ import (
 
 var DefaultHeadersExctract = []string{metadata.HeaderTopic, metadata.HeaderEndpoint, metadata.HeaderService, metadata.HeaderXRequestID}
 
-func extractLabels(md metadata.Metadata) []string {
+func ExtractDefaultLabels(md metadata.Metadata) []interface{} {
-	labels := make([]string, 0, 5)
+	labels := make([]interface{}, 0, len(DefaultHeadersExctract))
 	for _, k := range DefaultHeadersExctract {
 		if v, ok := md.Get(k); ok {
-			labels = append(labels, k, v)
+			labels = append(labels, strings.ToLower(k), v)
 		}
 	}
 	return labels
@@ -29,7 +30,7 @@ var (
 		sp.SetName(fmt.Sprintf("Call %s.%s", req.Service(), req.Method()))
 		var labels []interface{}
 		if md, ok := metadata.FromOutgoingContext(ctx); ok {
-			labels = append(labels, extractLabels(md))
+			labels = append(labels, ExtractDefaultLabels(md)...)
 		}
 		if err != nil {
 			sp.SetStatus(tracer.SpanStatusError, err.Error())
@@ -38,10 +39,9 @@ var (
 	}
 
 	DefaultClientStreamObserver = func(ctx context.Context, req client.Request, opts []options.Option, stream client.Stream, sp tracer.Span, err error) {
-		sp.SetName(fmt.Sprintf("Stream %s.%s", req.Service(), req.Method()))
 		var labels []interface{}
 		if md, ok := metadata.FromOutgoingContext(ctx); ok {
-			labels = append(labels, extractLabels(md))
+			labels = append(labels, ExtractDefaultLabels(md)...)
 		}
 		if err != nil {
 			sp.SetStatus(tracer.SpanStatusError, err.Error())
@@ -50,10 +50,9 @@ var (
 	}
 
 	DefaultServerHandlerObserver = func(ctx context.Context, req server.Request, rsp interface{}, sp tracer.Span, err error) {
-		sp.SetName(fmt.Sprintf("Handler %s.%s", req.Service(), req.Method()))
 		var labels []interface{}
 		if md, ok := metadata.FromIncomingContext(ctx); ok {
-			labels = append(labels, extractLabels(md))
+			labels = append(labels, ExtractDefaultLabels(md)...)
 		}
 		if err != nil {
 			sp.SetStatus(tracer.SpanStatusError, err.Error())
@@ -62,10 +61,10 @@ var (
 	}
 
 	DefaultClientCallFuncObserver = func(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions, sp tracer.Span, err error) {
-		sp.SetName(fmt.Sprintf("Call %s.%s", req.Service(), req.Method()))
+		sp.SetName(fmt.Sprintf("%s.%s call", req.Service(), req.Method()))
 		var labels []interface{}
 		if md, ok := metadata.FromOutgoingContext(ctx); ok {
-			labels = append(labels, extractLabels(md))
+			labels = append(labels, ExtractDefaultLabels(md)...)
 		}
 		if err != nil {
 			sp.SetStatus(tracer.SpanStatusError, err.Error())
@@ -177,23 +176,22 @@ func (ot *tWrapper) Call(ctx context.Context, req client.Request, rsp interface{
 		}
 	}
 
-	sp, ok := tracer.SpanFromContext(ctx)
+	nctx, sp := ot.opts.Tracer.Start(ctx, fmt.Sprintf("%s.%s rpc-client", req.Service(), req.Method()),
-	if !ok {
-		ctx, sp = ot.opts.Tracer.Start(ctx, "rpc-client",
 		tracer.WithSpanKind(tracer.SpanKindClient),
-			tracer.WithSpanLabels(
+		options.Labels(
+			"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(ctx, req, rsp, opts...)
+	err := ot.Client.Call(nctx, req, rsp, opts...)
 
 	for _, o := range ot.opts.ClientCallObservers {
-		o(ctx, req, rsp, opts, sp, err)
+		o(nctx, req, rsp, opts, sp, err)
 	}
 
 	return err
@@ -207,23 +205,22 @@ func (ot *tWrapper) Stream(ctx context.Context, req client.Request, opts ...opti
 		}
 	}
 
-	sp, ok := tracer.SpanFromContext(ctx)
+	nctx, sp := ot.opts.Tracer.Start(ctx, fmt.Sprintf("%s.%s rpc-client", req.Service(), req.Method()),
-	if !ok {
-		ctx, sp = ot.opts.Tracer.Start(ctx, "rpc-client",
 		tracer.WithSpanKind(tracer.SpanKindClient),
-			tracer.WithSpanLabels(
+		options.Labels(
+			"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(ctx, req, opts...)
+	stream, err := ot.Client.Stream(nctx, req, opts...)
 
 	for _, o := range ot.opts.ClientStreamObservers {
-		o(ctx, req, opts, stream, sp, err)
+		o(nctx, req, opts, stream, sp, err)
 	}
 
 	return stream, err
@@ -242,24 +239,22 @@ func (ot *tWrapper) ServerHandler(ctx context.Context, req server.Request, rsp i
 		callType = "stream"
 	}
 
-	sp, ok := tracer.SpanFromContext(ctx)
+	nctx, sp := ot.opts.Tracer.Start(ctx, fmt.Sprintf("%s.%s rpc-server", req.Service(), req.Method()),
-	if !ok {
-		ctx, sp = ot.opts.Tracer.Start(ctx, "rpc-server",
 		tracer.WithSpanKind(tracer.SpanKindServer),
-			tracer.WithSpanLabels(
+		options.Labels(
+			"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(ctx, req, rsp)
+	err := ot.serverHandler(nctx, req, rsp)
 
 	for _, o := range ot.opts.ServerHandlerObservers {
-		o(ctx, req, rsp, sp, err)
+		o(nctx, req, rsp, sp, err)
 	}
 
 	return err
@@ -297,23 +292,23 @@ func (ot *tWrapper) ClientCallFunc(ctx context.Context, addr string, req client.
 		}
 	}
 
-	sp, ok := tracer.SpanFromContext(ctx)
+	nctx, sp := ot.opts.Tracer.Start(ctx, fmt.Sprintf("%s.%s rpc-client", req.Service(), req.Method()),
-	if !ok {
-		ctx, sp = ot.opts.Tracer.Start(ctx, "rpc-client",
 		tracer.WithSpanKind(tracer.SpanKindClient),
-			tracer.WithSpanLabels(
+		options.Labels(
+			"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(ctx, addr, req, rsp, opts)
+	err := ot.clientCallFunc(nctx, addr, req, rsp, opts)
 
 	for _, o := range ot.opts.ClientCallFuncObservers {
-		o(ctx, addr, req, rsp, opts, sp, err)
+		o(nctx, addr, req, rsp, opts, sp, err)
 	}
 
 	return err

util/grpc/tracer.go

@@ -0,0 +1,256 @@
+package grpc_util
+
+import (
+	"context"
+	"net"
+	"strconv"
+	"strings"
+	"sync/atomic"
+	"time"
+
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/tracer"
+	grpc_codes "google.golang.org/grpc/codes"
+	"google.golang.org/grpc/peer"
+	"google.golang.org/grpc/stats"
+	"google.golang.org/grpc/status"
+)
+
+type gRPCContextKey struct{}
+
+type gRPCContext struct {
+	messagesReceived int64
+	messagesSent     int64
+}
+
+type Options struct {
+	Tracer tracer.Tracer
+}
+
+// NewServerHandler creates a stats.Handler for gRPC server.
+func NewServerHandler(tr tracer.Tracer) stats.Handler {
+	h := &serverHandler{
+		tr: tr,
+	}
+	return h
+}
+
+type serverHandler struct {
+	tr tracer.Tracer
+}
+
+// TagRPC can attach some information to the given context.
+func (h *serverHandler) TagRPC(ctx context.Context, info *stats.RPCTagInfo) context.Context {
+	name, attrs := parseFullMethod(info.FullMethodName)
+	attrs = append(attrs, "rpc.system", "grpc")
+	ctx, _ = h.tr.Start(
+		ctx,
+		name,
+		tracer.WithSpanKind(tracer.SpanKindServer),
+		options.Labels(attrs...),
+	)
+
+	gctx := gRPCContext{}
+	return context.WithValue(ctx, gRPCContextKey{}, &gctx)
+}
+
+// HandleRPC processes the RPC stats.
+func (h *serverHandler) HandleRPC(ctx context.Context, rs stats.RPCStats) {
+	handleRPC(ctx, rs)
+}
+
+// TagConn can attach some information to the given context.
+func (h *serverHandler) TagConn(ctx context.Context, info *stats.ConnTagInfo) context.Context {
+	if span, ok := tracer.SpanFromContext(ctx); ok {
+		attrs := peerAttr(peerFromCtx(ctx))
+		span.AddLabels(attrs...)
+	}
+	return ctx
+}
+
+// HandleConn processes the Conn stats.
+func (h *serverHandler) HandleConn(ctx context.Context, info stats.ConnStats) {
+}
+
+type clientHandler struct {
+	tr tracer.Tracer
+}
+
+// NewClientHandler creates a stats.Handler for gRPC client.
+func NewClientHandler(tr tracer.Tracer) stats.Handler {
+	h := &clientHandler{
+		tr: tr,
+	}
+	return h
+}
+
+// TagRPC can attach some information to the given context.
+func (h *clientHandler) TagRPC(ctx context.Context, info *stats.RPCTagInfo) context.Context {
+	name, attrs := parseFullMethod(info.FullMethodName)
+	attrs = append(attrs, "rpc.system", "grpc", "rpc.flavor", "grpc", "rpc.call", info.FullMethodName)
+	ctx, _ = h.tr.Start(
+		ctx,
+		name,
+		tracer.WithSpanKind(tracer.SpanKindClient),
+		options.Labels(attrs...),
+	)
+
+	gctx := gRPCContext{}
+
+	return context.WithValue(ctx, gRPCContextKey{}, &gctx)
+}
+
+// HandleRPC processes the RPC stats.
+func (h *clientHandler) HandleRPC(ctx context.Context, rs stats.RPCStats) {
+	handleRPC(ctx, rs)
+}
+
+// TagConn can attach some information to the given context.
+func (h *clientHandler) TagConn(ctx context.Context, cti *stats.ConnTagInfo) context.Context {
+	// TODO
+	if span, ok := tracer.SpanFromContext(ctx); ok {
+		attrs := peerAttr(cti.RemoteAddr.String())
+		span.AddLabels(attrs...)
+	}
+	return ctx
+}
+
+// HandleConn processes the Conn stats.
+func (h *clientHandler) HandleConn(context.Context, stats.ConnStats) {
+	// no-op
+}
+
+func handleRPC(ctx context.Context, rs stats.RPCStats) {
+	span, ok := tracer.SpanFromContext(ctx)
+	gctx, _ := ctx.Value(gRPCContextKey{}).(*gRPCContext)
+	var messageID int64
+	if rs.IsClient() {
+		span.AddLabels("span.kind", "client")
+	} else {
+		span.AddLabels("span.kind", "server")
+	}
+
+	switch rs := rs.(type) {
+	case *stats.Begin:
+		if rs.IsClientStream || rs.IsServerStream {
+			span.AddLabels("rpc.call_type", "stream")
+		} else {
+			span.AddLabels("rpc.call_type", "unary")
+		}
+		span.AddEvent("message",
+			options.Labels(
+				"message.begin_time", rs.BeginTime.Format(time.RFC3339),
+			),
+		)
+	case *stats.InPayload:
+		if gctx != nil {
+			messageID = atomic.AddInt64(&gctx.messagesReceived, 1)
+		}
+		if ok {
+			span.AddEvent("message",
+				options.Labels(
+					"message.recv_time", rs.RecvTime.Format(time.RFC3339),
+					"message.type", "RECEIVED",
+					"message.id", messageID,
+					"message.compressed_size", rs.CompressedLength,
+					"message.uncompressed_size", rs.Length,
+				),
+			)
+		}
+	case *stats.OutPayload:
+		if gctx != nil {
+			messageID = atomic.AddInt64(&gctx.messagesSent, 1)
+		}
+		if ok {
+			span.AddEvent("message",
+				options.Labels(
+					"message.sent_time", rs.SentTime.Format(time.RFC3339),
+					"message.type", "SENT",
+					"message.id", messageID,
+					"message.compressed_size", rs.CompressedLength,
+					"message.uncompressed_size", rs.Length,
+				),
+			)
+		}
+	case *stats.End:
+		if ok {
+			span.AddEvent("message",
+				options.Labels(
+					"message.begin_time", rs.BeginTime.Format(time.RFC3339),
+					"message.end_time", rs.EndTime.Format(time.RFC3339),
+				),
+			)
+			if rs.Error != nil {
+				s, _ := status.FromError(rs.Error)
+				span.SetStatus(tracer.SpanStatusError, s.Message())
+				span.AddLabels("rpc.grpc.status_code", s.Code())
+			} else {
+				span.AddLabels("rpc.grpc.status_code", grpc_codes.OK)
+			}
+			span.Finish()
+		}
+	default:
+		return
+	}
+}
+
+func parseFullMethod(fullMethod string) (string, []interface{}) {
+	if !strings.HasPrefix(fullMethod, "/") {
+		// Invalid format, does not follow `/package.service/method`.
+		return fullMethod, nil
+	}
+	name := fullMethod[1:]
+	pos := strings.LastIndex(name, "/")
+	if pos < 0 {
+		// Invalid format, does not follow `/package.service/method`.
+		return name, nil
+	}
+	service, method := name[:pos], name[pos+1:]
+
+	var attrs []interface{}
+	if service != "" {
+		attrs = append(attrs, "rpc.service", service)
+	}
+	if method != "" {
+		attrs = append(attrs, "rpc.method", method)
+	}
+	return name, attrs
+}
+
+func peerAttr(addr string) []interface{} {
+	host, p, err := net.SplitHostPort(addr)
+	if err != nil {
+		return nil
+	}
+
+	if host == "" {
+		host = "127.0.0.1"
+	}
+	port, err := strconv.Atoi(p)
+	if err != nil {
+		return nil
+	}
+
+	var attr []interface{}
+	if ip := net.ParseIP(host); ip != nil {
+		attr = []interface{}{
+			"net.sock.peer.addr", host,
+			"net.sock.peer.port", port,
+		}
+	} else {
+		attr = []interface{}{
+			"net.peer.name", host,
+			"net.peer.port", port,
+		}
+	}
+
+	return attr
+}
+
+func peerFromCtx(ctx context.Context) string {
+	p, ok := peer.FromContext(ctx)
+	if !ok {
+		return ""
+	}
+	return p.Addr.String()
+}

util/http/clienttracer.go

@@ -0,0 +1,254 @@
+//
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package http
+
+import (
+	"context"
+	"crypto/tls"
+	"net/http/httptrace"
+	"net/textproto"
+	"strings"
+	"sync"
+
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/tracer"
+)
+
+const (
+	httpStatus     = "http.status"
+	httpHeaderMIME = "http.mime"
+	httpRemoteAddr = "http.remote"
+	httpLocalAddr  = "http.local"
+	httpHost       = "http.host"
+)
+
+var hookMap = map[string]string{
+	"http.dns":     "http.getconn",
+	"http.connect": "http.getconn",
+	"http.tls":     "http.getconn",
+}
+
+func parentHook(hook string) string {
+	if strings.HasPrefix(hook, "http.connect") {
+		return hookMap["http.connect"]
+	}
+	return hookMap[hook]
+}
+
+type clientTracer struct {
+	context.Context
+	tr          tracer.Tracer
+	activeHooks map[string]context.Context
+	root        tracer.Span
+	mtx         sync.Mutex
+}
+
+func NewClientTrace(ctx context.Context, tr tracer.Tracer) *httptrace.ClientTrace {
+	ct := &clientTracer{
+		Context:     ctx,
+		activeHooks: make(map[string]context.Context),
+		tr:          tr,
+	}
+
+	return &httptrace.ClientTrace{
+		GetConn:              ct.getConn,
+		GotConn:              ct.gotConn,
+		PutIdleConn:          ct.putIdleConn,
+		GotFirstResponseByte: ct.gotFirstResponseByte,
+		Got100Continue:       ct.got100Continue,
+		Got1xxResponse:       ct.got1xxResponse,
+		DNSStart:             ct.dnsStart,
+		DNSDone:              ct.dnsDone,
+		ConnectStart:         ct.connectStart,
+		ConnectDone:          ct.connectDone,
+		TLSHandshakeStart:    ct.tlsHandshakeStart,
+		TLSHandshakeDone:     ct.tlsHandshakeDone,
+		WroteHeaderField:     ct.wroteHeaderField,
+		WroteHeaders:         ct.wroteHeaders,
+		Wait100Continue:      ct.wait100Continue,
+		WroteRequest:         ct.wroteRequest,
+	}
+}
+
+func (ct *clientTracer) start(hook, spanName string, attrs ...interface{}) {
+	ct.mtx.Lock()
+	defer ct.mtx.Unlock()
+
+	if hookCtx, found := ct.activeHooks[hook]; !found {
+		var sp tracer.Span
+		ct.activeHooks[hook], sp = ct.tr.Start(ct.getParentContext(hook), spanName, options.Labels(attrs...), tracer.WithSpanKind(tracer.SpanKindClient))
+		if ct.root == nil {
+			ct.root = sp
+		}
+	} else {
+		// end was called before start finished, add the start attributes and end the span here
+		if span, ok := tracer.SpanFromContext(hookCtx); ok {
+			span.AddLabels(attrs...)
+			span.Finish()
+		}
+
+		delete(ct.activeHooks, hook)
+	}
+}
+
+func (ct *clientTracer) end(hook string, err error, attrs ...interface{}) {
+	ct.mtx.Lock()
+	defer ct.mtx.Unlock()
+	if ctx, ok := ct.activeHooks[hook]; ok { // nolint:nestif
+		if span, ok := tracer.SpanFromContext(ctx); ok {
+			if err != nil {
+				span.SetStatus(tracer.SpanStatusError, err.Error())
+			}
+			span.AddLabels(attrs...)
+			span.Finish()
+		}
+		delete(ct.activeHooks, hook)
+	} else {
+		// start is not finished before end is called.
+		// Start a span here with the ending attributes that will be finished when start finishes.
+		// Yes, it's backwards. v0v
+		ctx, span := ct.tr.Start(ct.getParentContext(hook), hook, options.Labels(attrs...), tracer.WithSpanKind(tracer.SpanKindClient))
+		if err != nil {
+			span.SetStatus(tracer.SpanStatusError, err.Error())
+		}
+		ct.activeHooks[hook] = ctx
+	}
+}
+
+func (ct *clientTracer) getParentContext(hook string) context.Context {
+	ctx, ok := ct.activeHooks[parentHook(hook)]
+	if !ok {
+		return ct.Context
+	}
+	return ctx
+}
+
+func (ct *clientTracer) span(hook string) (tracer.Span, bool) {
+	ct.mtx.Lock()
+	defer ct.mtx.Unlock()
+	if ctx, ok := ct.activeHooks[hook]; ok {
+		return tracer.SpanFromContext(ctx)
+	}
+	return nil, false
+}
+
+func (ct *clientTracer) getConn(host string) {
+	ct.start("http.getconn", "http.getconn", httpHost, host)
+}
+
+func (ct *clientTracer) gotConn(info httptrace.GotConnInfo) {
+	ct.end("http.getconn",
+		nil,
+		httpRemoteAddr, info.Conn.RemoteAddr().String(),
+		httpLocalAddr, info.Conn.LocalAddr().String(),
+	)
+}
+
+func (ct *clientTracer) putIdleConn(err error) {
+	ct.end("http.receive", err)
+}
+
+func (ct *clientTracer) gotFirstResponseByte() {
+	ct.start("http.receive", "http.receive")
+}
+
+func (ct *clientTracer) dnsStart(info httptrace.DNSStartInfo) {
+	ct.start("http.dns", "http.dns", httpHost, info.Host)
+}
+
+func (ct *clientTracer) dnsDone(info httptrace.DNSDoneInfo) {
+	ct.end("http.dns", info.Err)
+}
+
+func (ct *clientTracer) connectStart(network, addr string) {
+	_ = network
+	ct.start("http.connect."+addr, "http.connect", httpRemoteAddr, addr)
+}
+
+func (ct *clientTracer) connectDone(network, addr string, err error) {
+	_ = network
+	ct.end("http.connect."+addr, err)
+}
+
+func (ct *clientTracer) tlsHandshakeStart() {
+	ct.start("http.tls", "http.tls")
+}
+
+func (ct *clientTracer) tlsHandshakeDone(_ tls.ConnectionState, err error) {
+	ct.end("http.tls", err)
+}
+
+func (ct *clientTracer) wroteHeaderField(k string, v []string) {
+	if sp, ok := ct.span("http.headers"); !ok || sp == nil {
+		ct.start("http.headers", "http.headers")
+	}
+	ct.root.AddLabels("http."+strings.ToLower(k), sliceToString(v))
+}
+
+func (ct *clientTracer) wroteHeaders() {
+	ct.start("http.send", "http.send")
+}
+
+func (ct *clientTracer) wroteRequest(info httptrace.WroteRequestInfo) {
+	if info.Err != nil {
+		ct.root.SetStatus(tracer.SpanStatusError, info.Err.Error())
+	}
+	ct.end("http.send", info.Err)
+}
+
+func (ct *clientTracer) got100Continue() {
+	if sp, ok := ct.span("http.receive"); ok && sp != nil {
+		sp.AddEvent("GOT 100 - Continue")
+	}
+}
+
+func (ct *clientTracer) wait100Continue() {
+	if sp, ok := ct.span("http.receive"); ok && sp != nil {
+		sp.AddEvent("GOT 100 - Wait")
+	}
+}
+
+func (ct *clientTracer) got1xxResponse(code int, header textproto.MIMEHeader) error {
+	if sp, ok := ct.span("http.receive"); ok && sp != nil {
+		sp.AddEvent("GOT 1xx",
+			options.Labels(
+				httpStatus, code,
+				httpHeaderMIME, sm2s(header),
+			),
+		)
+	}
+	return nil
+}
+
+func sliceToString(value []string) string {
+	if len(value) == 0 {
+		return "undefined"
+	}
+	return strings.Join(value, ",")
+}
+
+func sm2s(value map[string][]string) string {
+	var buf strings.Builder
+	for k, v := range value {
+		if buf.Len() != 0 {
+			buf.WriteString(",")
+		}
+		buf.WriteString(k)
+		buf.WriteString("=")
+		buf.WriteString(sliceToString(v))
+	}
+	return buf.String()
+}

util/reflect/reflect.go

@@ -508,3 +508,74 @@ func FieldName(name string) string {
 
 	return string(newstr)
 }
+
+func Equal(src interface{}, dst interface{}, excptFields ...string) bool {
+	srcVal := reflect.ValueOf(src)
+	dstVal := reflect.ValueOf(dst)
+
+	switch srcVal.Kind() {
+	case reflect.Array, reflect.Slice:
+		for i := 0; i < srcVal.Len(); i++ {
+			e := srcVal.Index(i).Interface()
+			a := dstVal.Index(i).Interface()
+			if !Equal(e, a, excptFields...) {
+				return false
+			}
+		}
+		return true
+	case reflect.Map:
+		for i := 0; i < len(srcVal.MapKeys()); i++ {
+			key := srcVal.MapKeys()[i]
+			keyStr := fmt.Sprintf("%v", key.Interface())
+			if stringContains(keyStr, excptFields) {
+				continue
+			}
+			s := srcVal.MapIndex(key)
+			d := dstVal.MapIndex(key)
+			if !Equal(s.Interface(), d.Interface(), excptFields...) {
+				return false
+			}
+		}
+		return true
+	case reflect.Struct, reflect.Interface:
+		for i := 0; i < srcVal.NumField(); i++ {
+			typeField := srcVal.Type().Field(i)
+			if stringContains(typeField.Name, excptFields) {
+				continue
+			}
+			s := srcVal.Field(i)
+			d := dstVal.FieldByName(typeField.Name)
+			if s.CanInterface() && d.CanInterface() {
+				if !Equal(s.Interface(), d.Interface(), excptFields...) {
+					return false
+				}
+			} else {
+				return false
+			}
+		}
+		return true
+	case reflect.Ptr:
+		if srcVal.IsNil() {
+			return dstVal.IsNil()
+		}
+		s := srcVal.Elem()
+		d := reflect.Indirect(dstVal)
+		if s.CanInterface() && d.CanInterface() {
+			return Equal(s.Interface(), d.Interface(), excptFields...)
+		}
+		return false
+	case reflect.String, reflect.Int, reflect.Int64, reflect.Float32, reflect.Float64, reflect.Bool:
+		return src == dst
+	default:
+		return srcVal.Interface() == dstVal.Interface()
+	}
+}
+
+func stringContains(a string, list []string) bool {
+	for _, b := range list {
+		if b == a {
+			return true
+		}
+	}
+	return false
+}

util/reflect/reflect_test.go

@@ -133,3 +133,16 @@ func TestMergeNested(t *testing.T) {
 		t.Fatalf("merge error: %#+v", dst.Nested)
 	}
 }
+
+func TestEqual(t *testing.T) {
+	type tstr struct {
+		Key1 string
+		Key2 string
+	}
+
+	src := &tstr{Key1: "val1", Key2: "micro:generate"}
+	dst := &tstr{Key1: "val1", Key2: "val2"}
+	if !Equal(src, dst, "Key2") {
+		t.Fatal("invalid Equal test")
+	}
+}

util/test/test.go

@@ -20,6 +20,7 @@ import (
 	"go.unistack.org/micro/v4/codec"
 	"go.unistack.org/micro/v4/errors"
 	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/options"
 	"golang.org/x/sync/errgroup"
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/proto"
@@ -226,7 +227,7 @@ func NewRequestFromFile(c client.Client, reqfile string) (client.Request, error)
 		return nil, err
 	}
 
-	req := c.NewRequest("test", endpoint, &codec.Frame{Data: reqbuf}, client.RequestContentType(ct))
+	req := c.NewRequest("test", endpoint, &codec.Frame{Data: reqbuf}, options.ContentType(ct))
 
 	return req, nil
 }
@@ -373,7 +374,7 @@ func Run(ctx context.Context, c client.Client, m sqlmock.Sqlmock, dir string, ex
 			data := &codec.Frame{}
 			md := metadata.New(1)
 			md.Set("X-Request-Id", xrid)
-			cerr := c.Call(metadata.NewOutgoingContext(gctx, md), treq, data, client.WithContentType(treq.ContentType()))
+			cerr := c.Call(metadata.NewOutgoingContext(gctx, md), treq, data, options.ContentType(treq.ContentType()))
 
 			var rspfile string