.gitea/workflows/autoupdate.yml

@@ -5,8 +5,8 @@ on:
     - 'master'
     - 'v3'
   schedule:
-    #- cron: '* * * * *'
+    - cron: '* * * * *'
-    - cron: '@hourly'
+    #- cron: '@hourly'
 
 jobs:
   autoupdate:

.gitea/workflows/coverage.yml

@@ -1,30 +0,0 @@
-name: Go
-
-on:
-  push:
-    branches: [ master, v3 ]
-  pull_request:
-    branches: [ master, v3 ]
-  workflow_dispatch:
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout
-      uses: actions/checkout@v4
-
-    - name: setup
-      uses: actions/setup-go@v4
-      with:
-        go-version: stable
-
-    - name: coverage
-      run: go test -v -coverprofile coverage.out ./...
-
-    - name: badge
-      uses: ncruces/go-coverage-report@main
-      with:
-        coverage-file: coverage.out
-        reuse-go: true
-        amend: true

.gitea/workflows/pr.yml

@@ -20,4 +20,4 @@ jobs:
     - name: test
       env:
         INTEGRATION_TESTS: yes
-      run: go test -v -mod readonly -race -coverprofile=coverage.txt -covermode=atomic ./...
+      run: go test -mod readonly -v ./...

.gitignore

@@ -1,8 +1,6 @@
 # Develop tools
 /.vscode/
 /.idea/
-.idea
-.vscode
 
 # Binaries for programs and plugins
 *.exe
@@ -15,7 +13,6 @@
 _obj
 _test
 _build
-.DS_Store
 
 # Architecture specific extensions/prefixes
 *.[568vq]

.golangci.yml

@@ -1,5 +1,6 @@
 run:
   concurrency: 4
+  deadline: 5m
   issues-exit-code: 1
   tests: true
 
@@ -12,13 +13,15 @@ linters-settings:
 linters:
   enable:
     - govet
+    - deadcode
     - errcheck
     - govet
     - ineffassign
     - staticcheck
+    - structcheck
     - typecheck
     - unused
-    - spancheck
+    - varcheck
     - bodyclose
     - gci
     - goconst
@@ -38,5 +41,4 @@ linters:
     - prealloc
     - unconvert
     - unparam
-    - unused
   disable-all: false

broker/broker.go

@@ -4,7 +4,6 @@ package broker // import "go.unistack.org/micro/v4/broker"
 import (
 	"context"
 	"errors"
-	"time"
 
 	"go.unistack.org/micro/v4/metadata"
 	"go.unistack.org/micro/v4/options"
@@ -20,8 +19,6 @@ var (
 	ErrDisconnected = errors.New("broker disconnected")
 	// ErrInvalidMessage returns when message has nvalid format
 	ErrInvalidMessage = errors.New("broker message has invalid format")
-	// DefaultGracefulTimeout
-	DefaultGracefulTimeout = 5 * time.Second
 )
 
 // Broker is an interface used for asynchronous messaging.

broker/memory_test.go

@@ -37,10 +37,10 @@ func TestMemoryBatchBroker(t *testing.T) {
 	msgs := make([]Message, 0, count)
 	for i := 0; i < count; i++ {
 		message := &memoryMessage{
-			header: metadata.Metadata{
+			header: map[string]string{
-				metadata.HeaderTopic: []string{topic},
+				metadata.HeaderTopic: topic,
-				"foo":                []string{"bar"},
+				"foo":                "bar",
-				"id":                 []string{fmt.Sprintf("%d", i)},
+				"id":                 fmt.Sprintf("%d", i),
 			},
 			body: []byte(`"hello world"`),
 		}
@@ -83,10 +83,10 @@ func TestMemoryBroker(t *testing.T) {
 	msgs := make([]Message, 0, count)
 	for i := 0; i < count; i++ {
 		message := &memoryMessage{
-			header: metadata.Metadata{
+			header: map[string]string{
-				metadata.HeaderTopic: []string{topic},
+				metadata.HeaderTopic: topic,
-				"foo":                []string{"bar"},
+				"foo":                "bar",
-				"id":                 []string{fmt.Sprintf("%d", i)},
+				"id":                 fmt.Sprintf("%d", i),
 			},
 			body: []byte(`"hello world"`),
 		}

broker/options.go

@@ -11,7 +11,6 @@ import (
 	"go.unistack.org/micro/v4/meter"
 	"go.unistack.org/micro/v4/options"
 	"go.unistack.org/micro/v4/register"
-	"go.unistack.org/micro/v4/sync"
 	"go.unistack.org/micro/v4/tracer"
 )
 
@@ -37,41 +36,36 @@ type Options struct {
 	Name string
 	// Address holds the broker address
 	Address []string
-
-	Wait *sync.WaitGroup
-
-	GracefulTimeout time.Duration
 }
 
 // NewOptions create new Options
 func NewOptions(opts ...options.Option) Options {
-	newOpts := Options{
+	options := Options{
 		Register: register.DefaultRegister,
 		Logger:   logger.DefaultLogger,
 		Context:  context.Background(),
 		Meter:    meter.DefaultMeter,
 		Codecs:   make(map[string]codec.Codec),
 		Tracer:   tracer.DefaultTracer,
-		GracefulTimeout: DefaultGracefulTimeout,
 	}
 	for _, o := range opts {
-		o(&newOpts)
+		o(&options)
 	}
-	return newOpts
+	return options
 }
 
 // PublishOptions struct
 type PublishOptions struct {
 	// Context holds external options
 	Context context.Context
+	// BodyOnly flag says the message contains raw body bytes
+	BodyOnly bool
 	// Message metadata usually passed as message headers
 	Metadata metadata.Metadata
 	// Content-Type of message for marshal
 	ContentType string
 	// Topic destination
 	Topic string
-	// BodyOnly flag says the message contains raw body bytes
-	BodyOnly bool
 }
 
 // NewPublishOptions creates PublishOptions struct

broker/subscriber.go

@@ -19,8 +19,8 @@ var typeOfError = reflect.TypeOf((*error)(nil)).Elem()
 
 // Is this an exported - upper case - name?
 func isExported(name string) bool {
-	r, _ := utf8.DecodeRuneInString(name)
+	rune, _ := utf8.DecodeRuneInString(name)
-	return unicode.IsUpper(r)
+	return unicode.IsUpper(rune)
 }
 
 // Is this type exported or a builtin?

config/default.go

@@ -7,8 +7,8 @@ import (
 	"strings"
 	"time"
 
-	"dario.cat/mergo"
 	"github.com/google/uuid"
+	"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"
@@ -40,10 +40,6 @@ func (c *defaultConfig) Init(opts ...options.Option) error {
 }
 
 func (c *defaultConfig) Load(ctx context.Context, opts ...options.Option) error {
-	if c.opts.SkipLoad != nil && c.opts.SkipLoad(ctx, c) {
-		return nil
-	}
-
 	if err := DefaultBeforeLoad(ctx, c); err != nil && !c.opts.AllowFail {
 		return err
 	}
@@ -296,11 +292,7 @@ func fillValues(valueOf reflect.Value, tname string) error {
 	return nil
 }
 
-func (c *defaultConfig) Save(ctx context.Context, _ ...options.Option) error {
+func (c *defaultConfig) Save(ctx context.Context, opts ...options.Option) error {
-	if c.opts.SkipSave != nil && c.opts.SkipSave(ctx, c) {
-		return nil
-	}
-
 	if err := DefaultBeforeSave(ctx, c); err != nil {
 		return err
 	}

config/default_test.go

@@ -31,9 +31,6 @@ func (c *cfg) Validate() error {
 	if c.IntValue != 10 {
 		return fmt.Errorf("invalid IntValue %d != %d", 10, c.IntValue)
 	}
-	if c.MapValue["key1"] != true {
-		return fmt.Errorf("invalid MapValue %t != %t", true, c.MapValue["key1"])
-	}
 	return nil
 }
 
@@ -108,19 +105,3 @@ func TestValidate(t *testing.T) {
 		t.Fatal(err)
 	}
 }
-
-func TestString(t *testing.T) {
-	cfg := config.NewConfig()
-	res := cfg.String()
-	if res != "default" {
-		t.Fatalf("string value invalid: %s", res)
-	}
-}
-
-func TestName(t *testing.T) {
-	cfg := config.NewConfig()
-	res := cfg.Name()
-	if res != "" {
-		t.Fatal("name value not empty")
-	}
-}

config/options.go

@@ -43,10 +43,6 @@ type Options struct {
 	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
 }
 
 // NewOptions new options struct with filed values

database/dsn.go

@@ -1,159 +0,0 @@
-package database
-
-import (
-	"crypto/tls"
-	"errors"
-	"fmt"
-	"net/url"
-	"strings"
-)
-
-var (
-	ErrInvalidDSNAddr      = errors.New("invalid dsn addr")
-	ErrInvalidDSNUnescaped = errors.New("dsn must be escaped")
-	ErrInvalidDSNNoSlash   = errors.New("dsn must contains slash")
-)
-
-type Config struct {
-	TLSConfig *tls.Config
-	Username  string
-	Password  string
-	Scheme    string
-	Host      string
-	Port      string
-	Database  string
-	Params    []string
-}
-
-func (cfg *Config) FormatDSN() string {
-	var s strings.Builder
-
-	if len(cfg.Scheme) > 0 {
-		s.WriteString(cfg.Scheme + "://")
-	}
-	// [username[:password]@]
-	if len(cfg.Username) > 0 {
-		s.WriteString(cfg.Username)
-		if len(cfg.Password) > 0 {
-			s.WriteByte(':')
-			s.WriteString(url.PathEscape(cfg.Password))
-		}
-		s.WriteByte('@')
-	}
-
-	// [host:port]
-	if len(cfg.Host) > 0 {
-		s.WriteString(cfg.Host)
-		if len(cfg.Port) > 0 {
-			s.WriteByte(':')
-			s.WriteString(cfg.Port)
-		}
-	}
-
-	// /dbname
-	s.WriteByte('/')
-	s.WriteString(url.PathEscape(cfg.Database))
-
-	for i := 0; i < len(cfg.Params); i += 2 {
-		if i == 0 {
-			s.WriteString("?")
-		} else {
-			s.WriteString("&")
-		}
-		s.WriteString(cfg.Params[i])
-		s.WriteString("=")
-		s.WriteString(cfg.Params[i+1])
-	}
-
-	return s.String()
-}
-
-func ParseDSN(dsn string) (*Config, error) {
-	cfg := &Config{}
-
-	// [user[:password]@][net[(addr)]]/dbname[?param1=value1&paramN=valueN]
-	// Find last '/' that goes before dbname
-	foundSlash := false
-	for i := len(dsn) - 1; i >= 0; i-- {
-		if dsn[i] != '/' {
-			continue
-		}
-
-		foundSlash = true
-		var j, k int
-
-		// left part is empty if i <= 0
-		if i > 0 {
-			// Find the first ':' in dsn
-			for j = i; j >= 0; j-- {
-				if dsn[j] == ':' {
-					cfg.Scheme = dsn[0:j]
-				}
-			}
-
-			// [username[:password]@][host]
-			// Find the last '@' in dsn[:i]
-			for j = i; j >= 0; j-- {
-				if dsn[j] == '@' {
-					// username[:password]
-					// Find the second ':' in dsn[:j]
-					for k = 0; k < j; k++ {
-						if dsn[k] == ':' {
-							if cfg.Scheme == dsn[:k] {
-								continue
-							}
-							var err error
-							cfg.Password, err = url.PathUnescape(dsn[k+1 : j])
-							if err != nil {
-								return nil, err
-							}
-							break
-						}
-					}
-					cfg.Username = dsn[len(cfg.Scheme)+3 : k]
-					break
-				}
-			}
-
-			for k = j + 1; k < i; k++ {
-				if dsn[k] == ':' {
-					cfg.Host = dsn[j+1 : k]
-					cfg.Port = dsn[k+1 : i]
-					break
-				}
-			}
-
-		}
-
-		// dbname[?param1=value1&...&paramN=valueN]
-		// Find the first '?' in dsn[i+1:]
-		for j = i + 1; j < len(dsn); j++ {
-			if dsn[j] == '?' {
-				parts := strings.Split(dsn[j+1:], "&")
-				cfg.Params = make([]string, 0, len(parts)*2)
-				for _, p := range parts {
-					k, v, found := strings.Cut(p, "=")
-					if !found {
-						continue
-					}
-					cfg.Params = append(cfg.Params, k, v)
-				}
-
-				break
-			}
-		}
-		var err error
-		dbname := dsn[i+1 : j]
-		if cfg.Database, err = url.PathUnescape(dbname); err != nil {
-			return nil, fmt.Errorf("invalid dbname %q: %w", dbname, err)
-		}
-
-		break
-	}
-
-	if !foundSlash && len(dsn) > 0 {
-		return nil, ErrInvalidDSNNoSlash
-	}
-
-	return cfg, nil
-}

database/dsn_test.go

@@ -1,31 +0,0 @@
-package database
-
-import (
-	"net/url"
-	"testing"
-)
-
-func TestParseDSN(t *testing.T) {
-	cfg, err := ParseDSN("postgres://username:p@ssword#@host:12345/dbname?key1=val2&key2=val2")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if cfg.Password != "p@ssword#" {
-		t.Fatalf("parsing error")
-	}
-}
-
-func TestFormatDSN(t *testing.T) {
-	src := "postgres://username:p@ssword#@host:12345/dbname?key1=val2&key2=val2"
-	cfg, err := ParseDSN(src)
-	if err != nil {
-		t.Fatal(err)
-	}
-	dst, err := url.PathUnescape(cfg.FormatDSN())
-	if err != nil {
-		t.Fatal(err)
-	}
-	if src != dst {
-		t.Fatalf("\n%s\n%s", src, dst)
-	}
-}

flow/flow_test.go

@@ -1,36 +0,0 @@
-package flow
-
-import (
-	"reflect"
-	"testing"
-)
-
-func FuzzMarshall(f *testing.F) {
-	f.Fuzz(func(t *testing.T, ref []byte) {
-		rm := RawMessage(ref)
-
-		b, err := rm.MarshalJSON()
-		if err != nil {
-			t.Errorf("Error MarshalJSON: %s", err)
-		}
-
-		if !reflect.DeepEqual(ref, b) {
-			t.Errorf("Error. Expected '%s', was '%s'", ref, b)
-		}
-	})
-}
-
-func FuzzUnmarshall(f *testing.F) {
-	f.Fuzz(func(t *testing.T, ref string) {
-		b := []byte(ref)
-		rm := RawMessage(b)
-
-		if err := rm.UnmarshalJSON(b); err != nil {
-			t.Errorf("Error UnmarshalJSON: %s", err)
-		}
-
-		if ref != string(rm) {
-			t.Errorf("Error. Expected '%s', was '%s'", ref, rm)
-		}
-	})
-}

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

go.mod

@@ -5,16 +5,17 @@ go 1.20
 require (
 	dario.cat/mergo v1.0.0
 	github.com/DATA-DOG/go-sqlmock v1.5.0
-	github.com/google/uuid v1.6.0
+	github.com/google/uuid v1.3.1
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5
-	golang.org/x/sync v0.6.0
+	golang.org/x/sync v0.3.0
-	golang.org/x/sys v0.16.0
+	golang.org/x/sys v0.12.0
-	google.golang.org/grpc v1.62.1
+	google.golang.org/grpc v1.58.2
-	google.golang.org/protobuf v1.32.0
+	google.golang.org/protobuf v1.31.0
 )
 
 require (
 	github.com/golang/protobuf v1.5.3 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 // indirect
+	golang.org/x/net v0.15.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 // indirect
 )

go.sum

@@ -6,28 +6,29 @@ github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaS
 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 v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
-github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.3.1 h1:KjJaJ9iWZ3jOFZIf1Lqf4laDRCasjl0BCmnEGxkdLb4=
-github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.3.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 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/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
+golang.org/x/net v0.15.0 h1:ugBLEUaxABaB5AJqW9enI0ACdci2RUd4eP51NTBvuJ8=
-golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
+golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
-golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
-golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
+golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
-golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+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 v0.0.0-20240123012728-ef4313101c80 h1:AjyfHzEPEFp/NpvfN5g+KDla3EMojjhRVZc1i7cj+oM=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 h1:bVf09lpb+OJbByTj913DRJioFFAjf/ZGxEz7MajTp2U=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80/go.mod h1:PAREbraiVEVGVdTZsVWjSbbTtSyGbAgIIvni8a8CD5s=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98/go.mod h1:TUfxEVdsvPg18p6AslUXFoLdpED4oBnGwyqk3dV1XzM=
-google.golang.org/grpc v1.62.1 h1:B4n+nfKzOICUXMgyrNd19h/I9oH0L1pizfk1d4zSgTk=
+google.golang.org/grpc v1.58.2 h1:SXUpjxeVF3FKrTYQI4f4KvbGD5u2xccdYdurwowix5I=
-google.golang.org/grpc v1.62.1/go.mod h1:IWTG0VlJLCh1SkC58F7np9ka9mx/WNkjl4PGJaiq+QE=
+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 v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
+google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
-google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

logger/logger.go

@@ -1,25 +1,26 @@
 // Package logger provides a log interface
-package logger
+package logger // import "go.unistack.org/micro/v4/logger"
 
 import (
 	"context"
+	"os"
 
 	"go.unistack.org/micro/v4/options"
 )
 
-type ContextAttrFunc func(ctx context.Context) []interface{}
-
-var DefaultContextAttrFuncs []ContextAttrFunc
-
 var (
 	// DefaultLogger variable
-	DefaultLogger = NewLogger()
+	DefaultLogger = NewLogger(WithLevel(ParseLevel(os.Getenv("MICRO_LOG_LEVEL"))))
 	// DefaultLevel used by logger
 	DefaultLevel = InfoLevel
 	// DefaultCallerSkipCount used by logger
 	DefaultCallerSkipCount = 2
 )
 
+type ContextAttrFunc func(ctx context.Context) []interface{}
+
+var DefaultContextAttrFuncs []ContextAttrFunc
+
 // Logger is a generic logging interface
 type Logger interface {
 	// Init initialises options
@@ -48,10 +49,8 @@ type Logger interface {
 	Fatal(ctx context.Context, msg string, attrs ...interface{})
 	// Log logs message with needed level
 	Log(ctx context.Context, level Level, msg string, attrs ...interface{})
-	// String returns the type name of logger
-	String() string
 	// String returns the name of logger
-	Name() string
+	String() string
 }
 
 // Info writes formatted msg to default logger on info level
@@ -64,8 +63,8 @@ func Error(ctx context.Context, msg string, attrs ...interface{}) {
 	DefaultLogger.Error(ctx, msg, attrs...)
 }
 
-// Debug writes formatted msg to default logger on debug level
+// Debugf writes formatted msg to default logger on debug level
-func Debug(ctx context.Context, msg string, attrs ...interface{}) {
+func Debugf(ctx context.Context, msg string, attrs ...interface{}) {
 	DefaultLogger.Debug(ctx, msg, attrs...)
 }
 

logger/logger_test.go

@@ -1,37 +1,21 @@
-package slog
+package logger
 
 import (
 	"bytes"
 	"context"
-	"fmt"
 	"log"
 	"testing"
-
-	"go.unistack.org/micro/v4/logger"
 )
 
-func TestError(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 {
-		t.Fatal(err)
-	}
-	l.Error(ctx, "msg", fmt.Errorf("message"))
-	if !bytes.Contains(buf.Bytes(), []byte(`"stacktrace":"`)) {
-		t.Fatalf("logger stacktrace not works, buf contains: %s", buf.Bytes())
-	}
-}
-
 func TestContext(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
 
-	nl, ok := logger.FromContext(logger.NewContext(ctx, l.Attrs("key", "val")))
+	nl, ok := FromContext(NewContext(ctx, l.Attrs("key", "val")))
 	if !ok {
 		t.Fatal("context without logger")
 	}
@@ -44,7 +28,7 @@ func TestContext(t *testing.T) {
 func TestAttrs(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
@@ -61,15 +45,15 @@ func TestFromContextWithFields(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
 	var ok bool
-	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
 	nl := l.Attrs("key", "val")
 
-	ctx = logger.NewContext(ctx, nl)
+	ctx = NewContext(ctx, nl)
 
-	l, ok = logger.FromContext(ctx)
+	l, ok = FromContext(ctx)
 	if !ok {
 		t.Fatalf("context does not have logger")
 	}
@@ -83,11 +67,11 @@ func TestFromContextWithFields(t *testing.T) {
 func TestClone(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
-	nl := l.Clone(logger.WithLevel(logger.ErrorLevel))
+	nl := l.Clone(WithLevel(ErrorLevel))
 	if err := nl.Init(); err != nil {
 		t.Fatal(err)
 	}
@@ -103,11 +87,11 @@ func TestClone(t *testing.T) {
 
 func TestRedirectStdLogger(t *testing.T) {
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.ErrorLevel), logger.WithOutput(buf))
+	l := NewLogger(WithLevel(ErrorLevel), WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
-	fn := logger.RedirectStdLogger(l, logger.ErrorLevel)
+	fn := RedirectStdLogger(l, ErrorLevel)
 	defer fn()
 	log.Print("test")
 	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"error"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"test"`))) {
@@ -117,11 +101,11 @@ func TestRedirectStdLogger(t *testing.T) {
 
 func TestStdLogger(t *testing.T) {
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
-	lg := logger.NewStdLogger(l, logger.ErrorLevel)
+	lg := NewStdLogger(l, ErrorLevel)
 	lg.Print("test")
 	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"error"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"test"`))) {
 		t.Fatalf("logger error, buf %s", buf.Bytes())
@@ -131,7 +115,7 @@ func TestStdLogger(t *testing.T) {
 func TestLogger(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}

logger/noop.go

@@ -1,75 +0,0 @@
-package logger
-
-import (
-	"context"
-
-	"go.unistack.org/micro/v4/options"
-)
-
-type noopLogger struct {
-	opts Options
-}
-
-func NewLogger(opts ...options.Option) Logger {
-	options := NewOptions(opts...)
-	return &noopLogger{opts: options}
-}
-
-func (l *noopLogger) V(lvl Level) bool {
-	return false
-}
-
-func (l *noopLogger) Level(lvl Level) {
-}
-
-func (l *noopLogger) Init(opts ...options.Option) error {
-	for _, o := range opts {
-		o(&l.opts)
-	}
-	return nil
-}
-
-func (l *noopLogger) Clone(opts ...options.Option) Logger {
-	nl := &noopLogger{opts: l.opts}
-	for _, o := range opts {
-		o(&nl.opts)
-	}
-	return nl
-}
-
-func (l *noopLogger) Attrs(attrs ...interface{}) Logger {
-	return l
-}
-
-func (l *noopLogger) Options() Options {
-	return l.opts
-}
-
-func (l *noopLogger) Name() string {
-	return l.opts.Name
-}
-
-func (l *noopLogger) String() string {
-	return "noop"
-}
-
-func (l *noopLogger) Log(ctx context.Context, lvl Level, msg string, attrs ...interface{}) {
-}
-
-func (l *noopLogger) Info(ctx context.Context, msg string, attrs ...interface{}) {
-}
-
-func (l *noopLogger) Debug(ctx context.Context, msg string, attrs ...interface{}) {
-}
-
-func (l *noopLogger) Error(ctx context.Context, msg string, attrs ...interface{}) {
-}
-
-func (l *noopLogger) Trace(ctx context.Context, msg string, attrs ...interface{}) {
-}
-
-func (l *noopLogger) Warn(ctx context.Context, msg string, attrs ...interface{}) {
-}
-
-func (l *noopLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
-}

logger/options.go

@@ -3,10 +3,8 @@ package logger
 import (
 	"context"
 	"io"
-	"log/slog"
 	"os"
 	"reflect"
-	"time"
 
 	"go.unistack.org/micro/v4/options"
 	rutil "go.unistack.org/micro/v4/util/reflect"
@@ -18,34 +16,16 @@ type Options struct {
 	Out io.Writer
 	// Context holds exernal options
 	Context context.Context
-	// TimeFunc used to obtain current time
-	TimeFunc func() time.Time
-	// TimeKey is the key used for the time of the log call
-	TimeKey string
-	// Name holds the logger name
-	Name string
-	// LevelKey is the key used for the level of the log call
-	LevelKey string
-	// MessageKey is the key used for the message of the log call
-	MessageKey string
-	// ErrorKey is the key used for the error info
-	ErrorKey string
-	// SourceKey is the key used for the source file and line of the log call
-	SourceKey string
-	// StacktraceKey is the key used for the stacktrace
-	StacktraceKey string
 	// Attrs holds additional attributes
 	Attrs []interface{}
-	// ContextAttrFuncs contains funcs that executed before log func on context
+	// Name holds the logger name
-	ContextAttrFuncs []ContextAttrFunc
+	Name string
-	// CallerSkipCount number of frmaes to skip
-	CallerSkipCount int
 	// The logging level the logger should log
 	Level Level
-	// AddStacktrace controls writing of stacktaces on error
+	// CallerSkipCount number of frmaes to skip
-	AddStacktrace bool
+	CallerSkipCount int
-	// AddSource enabled writing source file and position in log
+	// ContextAttrFuncs contains funcs that executed before log func on context
-	AddSource bool
+	ContextAttrFuncs []ContextAttrFunc
 }
 
 // NewOptions creates new options struct
@@ -57,29 +37,24 @@ func NewOptions(opts ...options.Option) Options {
 		CallerSkipCount:  DefaultCallerSkipCount,
 		Context:          context.Background(),
 		ContextAttrFuncs: DefaultContextAttrFuncs,
-		AddSource:        true,
-		TimeFunc:         time.Now,
 	}
-
-	_ = WithMicroKeys()(&options)
-
 	for _, o := range opts {
-		_ = o(&options)
+		o(&options)
 	}
 	return options
 }
 
 // WithContextAttrFuncs appends default funcs for the context arrts filler
-func WithContextAttrFuncs(fncs ...ContextAttrFunc) options.Option {
+func WithContextAttrFuncs(attrs ...interface{}) options.Option {
 	return func(src interface{}) error {
 		v, err := options.Get(src, ".ContextAttrFuncs")
 		if err != nil {
 			return err
 		} else if rutil.IsZero(v) {
-			v = reflect.MakeSlice(reflect.TypeOf(v), 0, len(fncs)).Interface()
+			v = reflect.MakeSlice(reflect.TypeOf(v), 0, len(attrs)).Interface()
 		}
 		cv := reflect.ValueOf(v)
-		for _, l := range fncs {
+		for _, l := range attrs {
 			cv = reflect.Append(cv, reflect.ValueOf(l))
 		}
 		return options.Set(src, cv.Interface(), ".ContextAttrFuncs")
@@ -113,131 +88,3 @@ func WithCallerSkipCount(c int) options.Option {
 		return options.Set(src, c, ".CallerSkipCount")
 	}
 }
-
-func WithZapKeys() options.Option {
-	return func(src interface{}) error {
-		var err error
-		if err = options.Set(src, "@timestamp", ".TimeKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "level", ".LevelKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "msg", ".MessageKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "caller", ".SourceKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "stacktrace", ".StacktraceKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "error", ".ErrorKey"); err != nil {
-			return err
-		}
-		return nil
-	}
-}
-
-func WithZerologKeys() options.Option {
-	return func(src interface{}) error {
-		var err error
-		if err = options.Set(src, "time", ".TimeKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "level", ".LevelKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "message", ".MessageKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "caller", ".SourceKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "stacktrace", ".StacktraceKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "error", ".ErrorKey"); err != nil {
-			return err
-		}
-		return nil
-	}
-}
-
-func WithSlogKeys() options.Option {
-	return func(src interface{}) error {
-		var err error
-		if err = options.Set(src, slog.TimeKey, ".TimeKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, slog.LevelKey, ".LevelKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, slog.MessageKey, ".MessageKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, slog.SourceKey, ".SourceKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "stacktrace", ".StacktraceKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "error", ".ErrorKey"); err != nil {
-			return err
-		}
-		return nil
-	}
-}
-
-func WithMicroKeys() options.Option {
-	return func(src interface{}) error {
-		var err error
-		if err = options.Set(src, "timestamp", ".TimeKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "level", ".LevelKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "msg", ".MessageKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "caller", ".SourceKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "stacktrace", ".StacktraceKey"); err != nil {
-			return err
-		}
-		if err = options.Set(src, "error", ".ErrorKey"); err != nil {
-			return err
-		}
-		return nil
-	}
-}
-
-// WithAddCallerSkipCount add skip count for copy logger
-func WithAddCallerSkipCount(n int) options.Option {
-	return func(src interface{}) error {
-		c, err := options.Get(src, ".CallerSkipCount")
-		if err != nil {
-			return err
-		}
-		if err = options.Set(src, c.(int)+n, ".CallerSkipCount"); err != nil {
-			return err
-		}
-		return nil
-	}
-}
-
-// WithAddStacktrace controls writing stacktrace on error
-func WithAddStacktrace(v bool) options.Option {
-	return func(src interface{}) error {
-		return options.Set(src, v, ".AddStacktrace")
-	}
-}
-
-// WitAddSource controls writing source file and pos in log
-func WithAddSource(v bool) options.Option {
-	return func(src interface{}) error {
-		return options.Set(src, v, ".AddSource")
-	}
-}

logger/slog.go

@@ -0,0 +1,286 @@
+package logger
+
+import (
+	"context"
+	"log/slog"
+	"os"
+	"runtime"
+	"strconv"
+	"time"
+
+	"go.unistack.org/micro/v4/options"
+)
+
+var (
+	traceValue = slog.StringValue("trace")
+	debugValue = slog.StringValue("debug")
+	infoValue  = slog.StringValue("info")
+	warnValue  = slog.StringValue("warn")
+	errorValue = slog.StringValue("error")
+	fatalValue = slog.StringValue("fatal")
+)
+
+var renameAttr = func(_ []string, a slog.Attr) slog.Attr {
+	switch a.Key {
+	case slog.SourceKey:
+		source := a.Value.Any().(*slog.Source)
+		a.Value = slog.StringValue(source.File + ":" + strconv.Itoa(source.Line))
+		a.Key = "caller"
+	case slog.TimeKey:
+		a.Key = "timestamp"
+	case slog.LevelKey:
+		level := a.Value.Any().(slog.Level)
+		lvl := slogToLoggerLevel(level)
+		switch {
+		case lvl < DebugLevel:
+			a.Value = traceValue
+		case lvl < InfoLevel:
+			a.Value = debugValue
+		case lvl < WarnLevel:
+			a.Value = infoValue
+		case lvl < ErrorLevel:
+			a.Value = warnValue
+		case lvl < FatalLevel:
+			a.Value = errorValue
+		case lvl >= FatalLevel:
+			a.Value = fatalValue
+		default:
+			a.Value = infoValue
+		}
+	}
+
+	return a
+}
+
+type slogLogger struct {
+	slog    *slog.Logger
+	leveler *slog.LevelVar
+	opts    Options
+}
+
+func (s *slogLogger) Clone(opts ...options.Option) Logger {
+	options := s.opts
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	l := &slogLogger{
+		opts: options,
+	}
+
+	if slog, ok := s.opts.Context.Value(loggerKey{}).(*slog.Logger); ok {
+		l.slog = slog
+		return nil
+	}
+
+	l.leveler = new(slog.LevelVar)
+	handleOpt := &slog.HandlerOptions{
+		ReplaceAttr: renameAttr,
+		Level:       l.leveler,
+		AddSource:   true,
+	}
+	l.leveler.Set(loggerToSlogLevel(l.opts.Level))
+	handler := slog.NewJSONHandler(options.Out, handleOpt)
+	l.slog = slog.New(handler).With(options.Attrs...)
+
+	return l
+}
+
+func (s *slogLogger) V(level Level) bool {
+	return s.opts.Level.Enabled(level)
+}
+
+func (s *slogLogger) Level(level Level) {
+	s.leveler.Set(loggerToSlogLevel(level))
+}
+
+func (s *slogLogger) Options() Options {
+	return s.opts
+}
+
+func (s *slogLogger) Attrs(attrs ...interface{}) Logger {
+	nl := &slogLogger{opts: s.opts}
+	nl.leveler = new(slog.LevelVar)
+	nl.leveler.Set(s.leveler.Level())
+
+	handleOpt := &slog.HandlerOptions{
+		ReplaceAttr: renameAttr,
+		Level:       s.leveler,
+		AddSource:   true,
+	}
+
+	handler := slog.NewJSONHandler(s.opts.Out, handleOpt)
+	nl.slog = slog.New(handler).With(attrs...)
+
+	return nl
+}
+
+func (s *slogLogger) Init(opts ...options.Option) error {
+	for _, o := range opts {
+		if err := o(&s.opts); err != nil {
+			return err
+		}
+	}
+
+	if slog, ok := s.opts.Context.Value(loggerKey{}).(*slog.Logger); ok {
+		s.slog = slog
+		return nil
+	}
+
+	s.leveler = new(slog.LevelVar)
+	handleOpt := &slog.HandlerOptions{
+		ReplaceAttr: renameAttr,
+		Level:       s.leveler,
+		AddSource:   true,
+	}
+	s.leveler.Set(loggerToSlogLevel(s.opts.Level))
+	handler := slog.NewJSONHandler(s.opts.Out, handleOpt)
+	s.slog = slog.New(handler).With(s.opts.Attrs...)
+
+	return nil
+}
+
+func (s *slogLogger) Log(ctx context.Context, lvl 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(time.Now(), loggerToSlogLevel(lvl), msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx))
+	}
+	r.Add(attrs...)
+	_ = s.slog.Handler().Handle(ctx, r)
+}
+
+func (s *slogLogger) Info(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(InfoLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(time.Now(), slog.LevelInfo, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx))
+	}
+	r.Add(attrs...)
+	_ = s.slog.Handler().Handle(ctx, r)
+}
+
+func (s *slogLogger) Debug(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(InfoLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(time.Now(), slog.LevelDebug, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx))
+	}
+	r.Add(attrs...)
+	_ = s.slog.Handler().Handle(ctx, r)
+}
+
+func (s *slogLogger) Trace(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(InfoLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(time.Now(), slog.LevelDebug-1, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx))
+	}
+	r.Add(attrs...)
+	_ = s.slog.Handler().Handle(ctx, r)
+}
+
+func (s *slogLogger) Error(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(InfoLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(time.Now(), slog.LevelError, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx))
+	}
+	r.Add(attrs...)
+	_ = s.slog.Handler().Handle(ctx, r)
+}
+
+func (s *slogLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(InfoLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(time.Now(), slog.LevelError+1, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx))
+	}
+	r.Add(attrs...)
+	_ = s.slog.Handler().Handle(ctx, r)
+	os.Exit(1)
+}
+
+func (s *slogLogger) Warn(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(InfoLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(time.Now(), slog.LevelWarn, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx))
+	}
+	r.Add(attrs...)
+	_ = s.slog.Handler().Handle(ctx, r)
+}
+
+func (s *slogLogger) String() string {
+	return "slog"
+}
+
+func NewLogger(opts ...options.Option) Logger {
+	l := &slogLogger{
+		opts: NewOptions(opts...),
+	}
+	return l
+}
+
+func loggerToSlogLevel(level Level) slog.Level {
+	switch level {
+	case DebugLevel:
+		return slog.LevelDebug
+	case WarnLevel:
+		return slog.LevelWarn
+	case ErrorLevel:
+		return slog.LevelError
+	case TraceLevel:
+		return slog.LevelDebug - 1
+	case FatalLevel:
+		return slog.LevelError + 1
+	default:
+		return slog.LevelInfo
+	}
+}
+
+func slogToLoggerLevel(level slog.Level) Level {
+	switch level {
+	case slog.LevelDebug:
+		return DebugLevel
+	case slog.LevelWarn:
+		return WarnLevel
+	case slog.LevelError:
+		return ErrorLevel
+	case slog.LevelDebug - 1:
+		return TraceLevel
+	case slog.LevelError + 1:
+		return FatalLevel
+	default:
+		return InfoLevel
+	}
+}

logger/slog/slog.go

@@ -1,378 +0,0 @@
-package slog
-
-import (
-	"context"
-	"log/slog"
-	"os"
-	"regexp"
-	"runtime"
-	"strconv"
-	"sync"
-
-	"go.unistack.org/micro/v4/logger"
-	"go.unistack.org/micro/v4/options"
-	"go.unistack.org/micro/v4/tracer"
-)
-
-var reTrace = regexp.MustCompile(`.*/slog/logger\.go.*\n`)
-
-var (
-	traceValue = slog.StringValue("trace")
-	debugValue = slog.StringValue("debug")
-	infoValue  = slog.StringValue("info")
-	warnValue  = slog.StringValue("warn")
-	errorValue = slog.StringValue("error")
-	fatalValue = slog.StringValue("fatal")
-)
-
-func (s *slogLogger) renameAttr(_ []string, a slog.Attr) slog.Attr {
-	switch a.Key {
-	case slog.SourceKey:
-		source := a.Value.Any().(*slog.Source)
-		a.Value = slog.StringValue(source.File + ":" + strconv.Itoa(source.Line))
-		a.Key = s.opts.SourceKey
-	case slog.TimeKey:
-		a.Key = s.opts.TimeKey
-	case slog.MessageKey:
-		a.Key = s.opts.MessageKey
-	case slog.LevelKey:
-		level := a.Value.Any().(slog.Level)
-		lvl := slogToLoggerLevel(level)
-		a.Key = s.opts.LevelKey
-		switch {
-		case lvl < logger.DebugLevel:
-			a.Value = traceValue
-		case lvl < logger.InfoLevel:
-			a.Value = debugValue
-		case lvl < logger.WarnLevel:
-			a.Value = infoValue
-		case lvl < logger.ErrorLevel:
-			a.Value = warnValue
-		case lvl < logger.FatalLevel:
-			a.Value = errorValue
-		case lvl >= logger.FatalLevel:
-			a.Value = fatalValue
-		default:
-			a.Value = infoValue
-		}
-	}
-
-	return a
-}
-
-type slogLogger struct {
-	leveler *slog.LevelVar
-	handler slog.Handler
-	opts    logger.Options
-	mu      sync.RWMutex
-}
-
-func (s *slogLogger) Clone(opts ...options.Option) logger.Logger {
-	s.mu.RLock()
-	options := s.opts
-	s.mu.RUnlock()
-
-	for _, o := range opts {
-		_ = o(&options)
-	}
-
-	l := &slogLogger{
-		opts: options,
-	}
-
-	l.leveler = new(slog.LevelVar)
-	handleOpt := &slog.HandlerOptions{
-		ReplaceAttr: l.renameAttr,
-		Level:       l.leveler,
-		AddSource:   l.opts.AddSource,
-	}
-	l.leveler.Set(loggerToSlogLevel(l.opts.Level))
-	l.handler = slog.New(slog.NewJSONHandler(options.Out, handleOpt)).With(options.Attrs...).Handler()
-
-	return l
-}
-
-func (s *slogLogger) V(level logger.Level) bool {
-	return s.opts.Level.Enabled(level)
-}
-
-func (s *slogLogger) Level(level logger.Level) {
-	s.leveler.Set(loggerToSlogLevel(level))
-}
-
-func (s *slogLogger) Options() logger.Options {
-	return s.opts
-}
-
-func (s *slogLogger) Attrs(attrs ...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,
-	}
-
-	l.handler = slog.New(slog.NewJSONHandler(s.opts.Out, handleOpt)).With(attrs...).Handler()
-
-	return l
-}
-
-func (s *slogLogger) Init(opts ...options.Option) error {
-	s.mu.Lock()
-
-	if len(s.opts.ContextAttrFuncs) == 0 {
-		s.opts.ContextAttrFuncs = logger.DefaultContextAttrFuncs
-	}
-
-	for _, o := range opts {
-		if err := o(&s.opts); err != nil {
-			return err
-		}
-	}
-
-	s.leveler = new(slog.LevelVar)
-	handleOpt := &slog.HandlerOptions{
-		ReplaceAttr: s.renameAttr,
-		Level:       s.leveler,
-		AddSource:   s.opts.AddSource,
-	}
-	s.leveler.Set(loggerToSlogLevel(s.opts.Level))
-	s.handler = slog.New(slog.NewJSONHandler(s.opts.Out, handleOpt)).With(s.opts.Attrs...).Handler()
-	s.mu.Unlock()
-
-	return nil
-}
-
-func (s *slogLogger) Log(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...)
-	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{}) {
-	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) Debug(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, 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...)
-	_ = s.handler.Handle(ctx, r)
-}
-
-func (s *slogLogger) Error(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(s.opts.StacktraceKey, 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, 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, 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...)
-	_ = s.handler.Handle(ctx, r)
-}
-
-func (s *slogLogger) Name() string {
-	return s.opts.Name
-}
-
-func (s *slogLogger) String() string {
-	return "slog"
-}
-
-func NewLogger(opts ...options.Option) logger.Logger {
-	l := &slogLogger{
-		opts: logger.NewOptions(opts...),
-	}
-	return l
-}
-
-func loggerToSlogLevel(level logger.Level) slog.Level {
-	switch level {
-	case logger.DebugLevel:
-		return slog.LevelDebug
-	case logger.WarnLevel:
-		return slog.LevelWarn
-	case logger.ErrorLevel:
-		return slog.LevelError
-	case logger.TraceLevel:
-		return slog.LevelDebug - 1
-	case logger.FatalLevel:
-		return slog.LevelError + 1
-	default:
-		return slog.LevelInfo
-	}
-}
-
-func slogToLoggerLevel(level slog.Level) logger.Level {
-	switch level {
-	case slog.LevelDebug:
-		return logger.DebugLevel
-	case slog.LevelWarn:
-		return logger.WarnLevel
-	case slog.LevelError:
-		return logger.ErrorLevel
-	case slog.LevelDebug - 1:
-		return logger.TraceLevel
-	case slog.LevelError + 1:
-		return logger.FatalLevel
-	default:
-		return logger.InfoLevel
-	}
-}

logger/unwrap/unwrap.go

@@ -56,9 +56,9 @@ type Wrapper struct {
 	s                fmt.State
 	pointers         map[uintptr]int
 	opts             *Options
-	takeMap          map[int]bool
 	depth            int
 	ignoreNextType   bool
+	takeMap          map[int]bool
 	protoWrapperType bool
 	sqlWrapperType   bool
 }

metadata/context.go

@@ -17,11 +17,11 @@ func FromIncomingContext(ctx context.Context) (Metadata, bool) {
 	if ctx == nil {
 		return nil, false
 	}
-	md, ok := ctx.Value(mdIncomingKey{}).(Metadata)
+	md, ok := ctx.Value(mdIncomingKey{}).(*rawMetadata)
-	if !ok || md == nil {
+	if !ok || md.md == nil {
 		return nil, false
 	}
-	return md, ok
+	return md.md, ok
 }
 
 // FromOutgoingContext returns metadata from outgoing ctx
@@ -30,11 +30,11 @@ func FromOutgoingContext(ctx context.Context) (Metadata, bool) {
 	if ctx == nil {
 		return nil, false
 	}
-	md, ok := ctx.Value(mdOutgoingKey{}).(Metadata)
+	md, ok := ctx.Value(mdOutgoingKey{}).(*rawMetadata)
-	if !ok || md == nil {
+	if !ok || md.md == nil {
 		return nil, false
 	}
-	return md, ok
+	return md.md, ok
 }
 
 // FromContext returns metadata from the given context
@@ -43,11 +43,11 @@ func FromContext(ctx context.Context) (Metadata, bool) {
 	if ctx == nil {
 		return nil, false
 	}
-	md, ok := ctx.Value(mdKey{}).(Metadata)
+	md, ok := ctx.Value(mdKey{}).(*rawMetadata)
-	if !ok || md == nil {
+	if !ok || md.md == nil {
 		return nil, false
 	}
-	return md, ok
+	return md.md, ok
 }
 
 // NewContext creates a new context with the given metadata
@@ -55,16 +55,45 @@ func NewContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	ctx = context.WithValue(ctx, mdKey{}, md)
+	ctx = context.WithValue(ctx, mdKey{}, &rawMetadata{md})
+	ctx = context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{})
+	ctx = context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{})
 	return ctx
 }
 
+// SetOutgoingContext modify outgoing context with given metadata
+func SetOutgoingContext(ctx context.Context, md Metadata) bool {
+	if ctx == nil {
+		return false
+	}
+	if omd, ok := ctx.Value(mdOutgoingKey{}).(*rawMetadata); ok {
+		omd.md = md
+		return true
+	}
+	return false
+}
+
+// SetIncomingContext modify incoming context with given metadata
+func SetIncomingContext(ctx context.Context, md Metadata) bool {
+	if ctx == nil {
+		return false
+	}
+	if omd, ok := ctx.Value(mdIncomingKey{}).(*rawMetadata); ok {
+		omd.md = md
+		return true
+	}
+	return false
+}
+
 // NewIncomingContext creates a new context with incoming metadata attached
 func NewIncomingContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	ctx = context.WithValue(ctx, mdIncomingKey{}, md)
+	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
 }
 
@@ -73,28 +102,41 @@ func NewOutgoingContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	ctx = context.WithValue(ctx, mdOutgoingKey{}, md)
+	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
 }
 
 // AppendOutgoingContext apends new md to context
 func AppendOutgoingContext(ctx context.Context, kv ...string) context.Context {
-	md := Pairs(kv...)
+	md, ok := Pairs(kv...)
+	if !ok {
+		return ctx
+	}
 	omd, ok := FromOutgoingContext(ctx)
 	if !ok {
 		return NewOutgoingContext(ctx, md)
 	}
-	nmd := Merge(omd, md, true)
+	for k, v := range md {
-	return NewOutgoingContext(ctx, nmd)
+		omd.Set(k, v)
+	}
+	return NewOutgoingContext(ctx, omd)
 }
 
 // AppendIncomingContext apends new md to context
 func AppendIncomingContext(ctx context.Context, kv ...string) context.Context {
-	md := Pairs(kv...)
+	md, ok := Pairs(kv...)
+	if !ok {
+		return ctx
+	}
 	omd, ok := FromIncomingContext(ctx)
 	if !ok {
 		return NewIncomingContext(ctx, md)
 	}
-	nmd := Merge(omd, md, true)
+	for k, v := range md {
-	return NewIncomingContext(ctx, nmd)
+		omd.Set(k, v)
+	}
+	return NewIncomingContext(ctx, omd)
 }

metadata/context_test.go

@@ -24,7 +24,7 @@ func TestNewNilContext(t *testing.T) {
 }
 
 func TestFromContext(t *testing.T) {
-	ctx := context.WithValue(context.TODO(), mdKey{}, New(0))
+	ctx := context.WithValue(context.TODO(), mdKey{}, &rawMetadata{New(0)})
 
 	c, ok := FromContext(ctx)
 	if c == nil || !ok {
@@ -42,7 +42,7 @@ func TestNewContext(t *testing.T) {
 }
 
 func TestFromIncomingContext(t *testing.T) {
-	ctx := context.WithValue(context.TODO(), mdIncomingKey{}, New(0))
+	ctx := context.WithValue(context.TODO(), mdIncomingKey{}, &rawMetadata{New(0)})
 
 	c, ok := FromIncomingContext(ctx)
 	if c == nil || !ok {
@@ -51,7 +51,7 @@ func TestFromIncomingContext(t *testing.T) {
 }
 
 func TestFromOutgoingContext(t *testing.T) {
-	ctx := context.WithValue(context.TODO(), mdOutgoingKey{}, New(0))
+	ctx := context.WithValue(context.TODO(), mdOutgoingKey{}, &rawMetadata{New(0)})
 
 	c, ok := FromOutgoingContext(ctx)
 	if c == nil || !ok {
@@ -59,6 +59,36 @@ func TestFromOutgoingContext(t *testing.T) {
 	}
 }
 
+func TestSetIncomingContext(t *testing.T) {
+	md := New(1)
+	md.Set("key", "val")
+	ctx := context.WithValue(context.TODO(), mdIncomingKey{}, &rawMetadata{})
+	if !SetIncomingContext(ctx, md) {
+		t.Fatal("SetIncomingContext not works")
+	}
+	md, ok := FromIncomingContext(ctx)
+	if md == nil || !ok {
+		t.Fatal("SetIncomingContext not works")
+	} else if v, ok := md.Get("key"); !ok || v != "val" {
+		t.Fatal("SetIncomingContext not works")
+	}
+}
+
+func TestSetOutgoingContext(t *testing.T) {
+	md := New(1)
+	md.Set("key", "val")
+	ctx := context.WithValue(context.TODO(), mdOutgoingKey{}, &rawMetadata{})
+	if !SetOutgoingContext(ctx, md) {
+		t.Fatal("SetOutgoingContext not works")
+	}
+	md, ok := FromOutgoingContext(ctx)
+	if md == nil || !ok {
+		t.Fatal("SetOutgoingContext not works")
+	} else if v, ok := md.Get("key"); !ok || v != "val" {
+		t.Fatal("SetOutgoingContext not works")
+	}
+}
+
 func TestNewIncomingContext(t *testing.T) {
 	md := New(1)
 	md.Set("key", "val")

metadata/metadata.go

@@ -1,9 +1,9 @@
 // Package metadata is a way of defining message headers
-package metadata
+package metadata // import "go.unistack.org/micro/v4/metadata"
 
 import (
 	"net/textproto"
-	"strings"
+	"sort"
 )
 
 var (
@@ -24,7 +24,47 @@ var (
 )
 
 // Metadata is our way of representing request headers internally.
-type Metadata map[string][]string
+// They're used at the RPC level and translate back and forth
+// from Transport headers.
+type Metadata map[string]string
+
+type rawMetadata struct {
+	md Metadata
+}
+
+// defaultMetadataSize used when need to init new Metadata
+var defaultMetadataSize = 2
+
+// Iterator used to iterate over metadata with order
+type Iterator struct {
+	md   Metadata
+	keys []string
+	cur  int
+	cnt  int
+}
+
+// Next advance iterator to next element
+func (iter *Iterator) Next(k, v *string) bool {
+	if iter.cur+1 > iter.cnt {
+		return false
+	}
+
+	*k = iter.keys[iter.cur]
+	*v = iter.md[*k]
+	iter.cur++
+	return true
+}
+
+// Iterator returns the itarator for metadata in sorted order
+func (md Metadata) Iterator() *Iterator {
+	iter := &Iterator{md: md, cnt: len(md)}
+	iter.keys = make([]string, 0, iter.cnt)
+	for k := range md {
+		iter.keys = append(iter.keys, k)
+	}
+	sort.Strings(iter.keys)
+	return iter
+}
 
 // Get returns value from metadata by key
 func (md Metadata) Get(key string) (string, bool) {
@@ -34,7 +74,7 @@ func (md Metadata) Get(key string) (string, bool) {
 		// slow path
 		val, ok = md[textproto.CanonicalMIMEHeaderKey(key)]
 	}
-	return strings.Join(val, ","), ok
+	return val, ok
 }
 
 // Set is used to store value in metadata
@@ -43,19 +83,10 @@ func (md Metadata) Set(kv ...string) {
 		kv = kv[:len(kv)-1]
 	}
 	for idx := 0; idx < len(kv); idx += 2 {
-		md[textproto.CanonicalMIMEHeaderKey(kv[idx])] = []string{kv[idx+1]}
+		md[textproto.CanonicalMIMEHeaderKey(kv[idx])] = kv[idx+1]
 	}
 }
 
-// Append is used to append value in metadata
-func (md Metadata) Append(k string, v ...string) {
-	if len(v) == 0 {
-		return
-	}
-	k = textproto.CanonicalMIMEHeaderKey(k)
-	md[k] = append(md[k], v...)
-}
-
 // Del is used to remove value from metadata
 func (md Metadata) Del(keys ...string) {
 	for _, key := range keys {
@@ -67,52 +98,46 @@ func (md Metadata) Del(keys ...string) {
 }
 
 // Copy makes a copy of the metadata
-func Copy(md Metadata, exclude ...string) Metadata {
+func Copy(md Metadata) Metadata {
-	nmd := make(Metadata, len(md))
+	nmd := New(len(md))
-	for k, v := range md {
+	for key, val := range md {
-		nmd[k] = v
+		nmd.Set(key, val)
 	}
-	nmd.Del(exclude...)
 	return nmd
 }
 
 // New return new sized metadata
 func New(size int) Metadata {
 	if size == 0 {
-		size = 2
+		size = defaultMetadataSize
 	}
 	return make(Metadata, size)
 }
 
 // Merge merges metadata to existing metadata, overwriting if specified
 func Merge(omd Metadata, mmd Metadata, overwrite bool) Metadata {
+	var ok bool
 	nmd := Copy(omd)
 	for key, val := range mmd {
-		nval, ok := nmd[key]
+		_, ok = nmd[key]
 		switch {
-		case ok && overwrite:
-			nmd[key] = nval
-			continue
 		case ok && !overwrite:
 			continue
-		case !ok:
+		case val != "":
-			for _, v := range val {
+			nmd.Set(key, val)
-				if v != "" {
+		case ok && val == "":
-					nval = append(nval, v)
+			nmd.Del(key)
-				}
-			}
-			nmd[key] = nval
 		}
 	}
 	return nmd
 }
 
 // Pairs from which metadata created
-func Pairs(kv ...string) Metadata {
+func Pairs(kv ...string) (Metadata, bool) {
 	if len(kv)%2 == 1 {
-		kv = kv[:len(kv)-1]
+		return nil, false
 	}
-	md := make(Metadata, len(kv)/2)
+	md := New(len(kv) / 2)
 	md.Set(kv...)
-	return md
+	return md, true
 }

metadata/metadata_test.go

@@ -33,52 +33,30 @@ func TestAppend(t *testing.T) {
 }
 
 func TestPairs(t *testing.T) {
-	md := Pairs("key1", "val1", "key2", "val2")
+	md, ok := Pairs("key1", "val1", "key2", "val2")
-
+	if !ok {
-	if _, ok := md.Get("key1"); !ok {
+		t.Fatal("odd number of kv")
+	}
+	if _, ok = md.Get("key1"); !ok {
 		t.Fatal("key1 not found")
 	}
 }
 
-func testIncomingCtx(ctx context.Context) {
+func testCtx(ctx context.Context) {
-	if md, ok := FromIncomingContext(ctx); ok && md != nil {
+	md := New(2)
 	md.Set("Key1", "Val1_new")
 	md.Set("Key3", "Val3")
-	}
+	SetOutgoingContext(ctx, md)
 }
 
-func testOutgoingCtx(ctx context.Context) {
+func TestPassing(t *testing.T) {
-	if md, ok := FromOutgoingContext(ctx); ok && md != nil {
-		md.Set("Key1", "Val1_new")
-		md.Set("Key3", "Val3")
-	}
-}
-
-func TestIncoming(t *testing.T) {
 	ctx := context.TODO()
 	md1 := New(2)
 	md1.Set("Key1", "Val1")
 	md1.Set("Key2", "Val2")
 
 	ctx = NewIncomingContext(ctx, md1)
-	testIncomingCtx(ctx)
+	testCtx(ctx)
-	md, ok := FromIncomingContext(ctx)
-	if !ok {
-		t.Fatalf("missing metadata from incoming context")
-	}
-	if v, ok := md.Get("Key1"); !ok || v != "Val1_new" {
-		t.Fatalf("invalid metadata value %#+v", md)
-	}
-}
-
-func TestOutgoing(t *testing.T) {
-	ctx := context.TODO()
-	md1 := New(2)
-	md1.Set("Key1", "Val1")
-	md1.Set("Key2", "Val2")
-
-	ctx = NewOutgoingContext(ctx, md1)
-	testOutgoingCtx(ctx)
 	md, ok := FromOutgoingContext(ctx)
 	if !ok {
 		t.Fatalf("missing metadata from outgoing context")
@@ -90,10 +68,10 @@ func TestOutgoing(t *testing.T) {
 
 func TestMerge(t *testing.T) {
 	omd := Metadata{
-		"key1": []string{"val1"},
+		"key1": "val1",
 	}
 	mmd := Metadata{
-		"key2": []string{"val2"},
+		"key2": "val2",
 	}
 
 	nmd := Merge(omd, mmd, true)
@@ -102,6 +80,21 @@ func TestMerge(t *testing.T) {
 	}
 }
 
+func TestIterator(t *testing.T) {
+	md := Metadata{
+		"1Last":   "last",
+		"2First":  "first",
+		"3Second": "second",
+	}
+
+	iter := md.Iterator()
+	var k, v string
+
+	for iter.Next(&k, &v) {
+		// fmt.Printf("k: %s, v: %s\n", k, v)
+	}
+}
+
 func TestMedataCanonicalKey(t *testing.T) {
 	md := New(1)
 	md.Set("x-request-id", "12345")
@@ -141,7 +134,10 @@ func TestMetadataSet(t *testing.T) {
 }
 
 func TestMetadataDelete(t *testing.T) {
-	md := Pairs("Foo", "bar", "Baz", "empty")
+	md := Metadata{
+		"Foo": "bar",
+		"Baz": "empty",
+	}
 
 	md.Del("Baz")
 	_, ok := md.Get("Baz")
@@ -160,19 +156,24 @@ func TestNilContext(t *testing.T) {
 }
 
 func TestMetadataCopy(t *testing.T) {
-	md := Pairs("Foo", "bar", "Bar", "baz")
+	md := Metadata{
+		"Foo": "bar",
+		"Bar": "baz",
+	}
 
 	cp := Copy(md)
 
 	for k, v := range md {
-		if cv := cp[k]; len(cv) != len(v) {
+		if cv := cp[k]; cv != v {
 			t.Fatalf("Got %s:%s for %s:%s", k, cv, k, v)
 		}
 	}
 }
 
 func TestMetadataContext(t *testing.T) {
-	md := Pairs("Foo", "bar")
+	md := Metadata{
+		"Foo": "bar",
+	}
 
 	ctx := NewContext(context.TODO(), md)
 
@@ -181,7 +182,7 @@ func TestMetadataContext(t *testing.T) {
 		t.Errorf("Unexpected error retrieving metadata, got %t", ok)
 	}
 
-	if len(emd["Foo"]) != len(md["Foo"]) {
+	if emd["Foo"] != md["Foo"] {
 		t.Errorf("Expected key: %s val: %s, got key: %s val: %s", "Foo", md["Foo"], "Foo", emd["Foo"])
 	}
 
@@ -189,14 +190,3 @@ func TestMetadataContext(t *testing.T) {
 		t.Errorf("Expected metadata length 1 got %d", i)
 	}
 }
-
-func TestCopy(t *testing.T) {
-	md := New(2)
-	md.Set("key1", "val1", "key2", "val2")
-	nmd := Copy(md, "key2")
-	if len(nmd) != 1 {
-		t.Fatal("Copy exclude not works")
-	} else if nmd["Key1"][0] != "val1" {
-		t.Fatal("Copy exclude not works")
-	}
-}

micro.go

@@ -1,98 +0,0 @@
-package micro
-
-import (
-	"reflect"
-
-	"go.unistack.org/micro/v4/broker"
-	"go.unistack.org/micro/v4/client"
-	"go.unistack.org/micro/v4/codec"
-	"go.unistack.org/micro/v4/flow"
-	"go.unistack.org/micro/v4/fsm"
-	"go.unistack.org/micro/v4/logger"
-	"go.unistack.org/micro/v4/meter"
-	"go.unistack.org/micro/v4/register"
-	"go.unistack.org/micro/v4/resolver"
-	"go.unistack.org/micro/v4/router"
-	"go.unistack.org/micro/v4/selector"
-	"go.unistack.org/micro/v4/server"
-	"go.unistack.org/micro/v4/store"
-	"go.unistack.org/micro/v4/sync"
-	"go.unistack.org/micro/v4/tracer"
-)
-
-func As(b any, target any) bool {
-	if b == nil {
-		return false
-	}
-	if target == nil {
-		return false
-	}
-	val := reflect.ValueOf(target)
-	typ := val.Type()
-	if typ.Kind() != reflect.Ptr || val.IsNil() {
-		return false
-	}
-	targetType := typ.Elem()
-	if targetType.Kind() != reflect.Interface {
-		switch {
-		case targetType.Implements(brokerType):
-			break
-		case targetType.Implements(loggerType):
-			break
-		case targetType.Implements(clientType):
-			break
-		case targetType.Implements(serverType):
-			break
-		case targetType.Implements(codecType):
-			break
-		case targetType.Implements(flowType):
-			break
-		case targetType.Implements(fsmType):
-			break
-		case targetType.Implements(meterType):
-			break
-		case targetType.Implements(registerType):
-			break
-		case targetType.Implements(resolverType):
-			break
-		case targetType.Implements(selectorType):
-			break
-		case targetType.Implements(storeType):
-			break
-		case targetType.Implements(syncType):
-			break
-		case targetType.Implements(serviceType):
-			break
-		case targetType.Implements(routerType):
-			break
-		case targetType.Implements(tracerType):
-			break
-		default:
-			return false
-		}
-	}
-	if reflect.TypeOf(b).AssignableTo(targetType) {
-		val.Elem().Set(reflect.ValueOf(b))
-		return true
-	}
-	return false
-}
-
-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

@@ -1,103 +0,0 @@
-package micro
-
-import (
-	"context"
-	"fmt"
-	"reflect"
-	"testing"
-
-	"go.unistack.org/micro/v4/broker"
-	"go.unistack.org/micro/v4/fsm"
-	"go.unistack.org/micro/v4/options"
-)
-
-func TestAs(t *testing.T) {
-	var b *bro
-	broTarget := &bro{name: "kafka"}
-	fsmTarget := &fsmT{name: "fsm"}
-
-	testCases := []struct {
-		b      any
-		target any
-		match  bool
-		want   any
-	}{
-		{
-			broTarget,
-			&b,
-			true,
-			broTarget,
-		},
-		{
-			nil,
-			&b,
-			false,
-			nil,
-		},
-		{
-			fsmTarget,
-			&b,
-			false,
-			nil,
-		},
-	}
-	for i, tc := range testCases {
-		name := fmt.Sprintf("%d:As(Errorf(..., %v), %v)", i, tc.b, tc.target)
-		// Clear the target pointer, in case it was set in a previous test.
-		rtarget := reflect.ValueOf(tc.target)
-		rtarget.Elem().Set(reflect.Zero(reflect.TypeOf(tc.target).Elem()))
-		t.Run(name, func(t *testing.T) {
-			match := As(tc.b, tc.target)
-			if match != tc.match {
-				t.Fatalf("match: got %v; want %v", match, tc.match)
-			}
-			if !match {
-				return
-			}
-			if got := rtarget.Elem().Interface(); got != tc.want {
-				t.Fatalf("got %#v, want %#v", got, tc.want)
-			}
-		})
-	}
-}
-
-type bro struct {
-	name string
-}
-
-func (p *bro) Name() string                      { return p.name }
-func (p *bro) Init(opts ...options.Option) error { return nil }
-
-// Options returns broker options
-func (p *bro) Options() broker.Options { return broker.Options{} }
-
-// Address return configured address
-func (p *bro) Address() string { return "" }
-
-// Connect connects to broker
-func (p *bro) Connect(ctx context.Context) error { return nil }
-
-// Disconnect disconnect from broker
-func (p *bro) Disconnect(ctx context.Context) error { return nil }
-
-// Publish message, msg can be single broker.Message or []broker.Message
-func (p *bro) Publish(ctx context.Context, msg interface{}, opts ...options.Option) error { return nil }
-
-// Subscribe subscribes to topic message via handler
-func (p *bro) Subscribe(ctx context.Context, topic string, handler interface{}, opts ...options.Option) (broker.Subscriber, error) {
-	return nil, nil
-}
-
-// String type of broker
-func (p *bro) String() string { return p.name }
-
-type fsmT struct {
-	name string
-}
-
-func (f *fsmT) Start(ctx context.Context, a interface{}, o ...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) {}

options/options.go

@@ -151,41 +151,9 @@ func ContentType(ct string) Option {
 }
 
 // Metadata pass additional metadata
-func Metadata(md ...any) Option {
+func Metadata(md metadata.Metadata) Option {
-	var result metadata.Metadata
-	if len(md) == 1 {
-		switch vt := md[0].(type) {
-		case metadata.Metadata:
-			result = metadata.Copy(vt)
-		case map[string]string:
-			result = make(metadata.Metadata, len(vt))
-			for k, v := range vt {
-				result.Set(k, v)
-			}
-		case map[string][]string:
-			result = metadata.Copy(vt)
-		default:
-			result = metadata.New(0)
-		}
-	} else {
-		result = metadata.New(len(md) / 2)
-		for idx := 0; idx <= len(md)/2; idx += 2 {
-			k, ok := md[idx].(string)
-			switch vt := md[idx+1].(type) {
-			case string:
-				if ok {
-					result.Set(k, vt)
-				}
-			case []string:
-				if ok {
-					result.Append(k, vt...)
-				}
-			}
-		}
-	}
-
 	return func(src interface{}) error {
-		return Set(src, result, ".Metadata")
+		return Set(src, metadata.Copy(md), ".Metadata")
 	}
 }
 

options/options_test.go

@@ -4,9 +4,7 @@ import (
 	"testing"
 
 	"go.unistack.org/micro/v4/codec"
-	"go.unistack.org/micro/v4/metadata"
 	"go.unistack.org/micro/v4/options"
-	"go.unistack.org/micro/v4/util/reflect"
 )
 
 func TestAddress(t *testing.T) {
@@ -86,64 +84,3 @@ func TestLabels(t *testing.T) {
 		t.Fatal("failed to set labels")
 	}
 }
-
-func TestMetadataAny(t *testing.T) {
-	type s struct {
-		Metadata metadata.Metadata
-	}
-
-	testCases := []struct {
-		Name     string
-		Data     any
-		Expected metadata.Metadata
-	}{
-		{
-			"strings_even",
-			[]any{"Strkey1", []string{"val1"}, "Strkey2", []string{"val2"}},
-			metadata.Pairs("Strkey1", "val1", "Strkey2", "val2"),
-		},
-		{
-			"strings_odd",
-			[]any{"key1", "val1", "key2"},
-			metadata.Pairs("Key1", "val1"),
-		},
-		{
-			Name: "map",
-			Data: map[string][]string{
-				"Mapkey1": {"val1"},
-				"Mapkey2": {"val2"},
-			},
-			Expected: metadata.Metadata{
-				"Mapkey1": []string{"val1"},
-				"Mapkey2": []string{"val2"},
-			},
-		},
-		{
-			"metadata.Metadata",
-			metadata.Pairs("key1", "val1", "key2", "val2"),
-			metadata.Pairs("Key1", "val1", "Key2", "val2"),
-		},
-	}
-
-	for _, tt := range testCases {
-		t.Run(tt.Name, func(t *testing.T) {
-			src := &s{}
-			var opts []options.Option
-			switch valData := tt.Data.(type) {
-			case []any:
-				opts = append(opts, options.Metadata(valData...))
-			case map[string]string, map[string][]string, metadata.Metadata:
-				opts = append(opts, options.Metadata(valData))
-			}
-
-			for _, o := range opts {
-				if err := o(src); err != nil {
-					t.Fatal(err)
-				}
-				if !reflect.Equal(tt.Expected, src.Metadata) {
-					t.Fatalf("expected: %v, actual: %v", tt.Expected, src.Metadata)
-				}
-			}
-		})
-	}
-}

register/memory.go

@@ -1,13 +1,10 @@
-package memory
+package register
 
 import (
 	"context"
 	"sync"
 	"time"
 
-	"go.unistack.org/micro/v4/metadata"
-	"go.unistack.org/micro/v4/register"
-
 	"go.unistack.org/micro/v4/logger"
 	"go.unistack.org/micro/v4/util/id"
 )
@@ -19,32 +16,32 @@ var (
 
 type node struct {
 	LastSeen time.Time
-	*register.Node
+	*Node
 	TTL time.Duration
 }
 
 type record struct {
 	Name      string
 	Version   string
-	Metadata  metadata.Metadata
+	Metadata  map[string]string
 	Nodes     map[string]*node
-	Endpoints []*register.Endpoint
+	Endpoints []*Endpoint
 }
 
 type memory struct {
+	sync.RWMutex
 	records  map[string]services
 	watchers map[string]*watcher
-	opts     register.Options
+	opts     Options
-	sync.RWMutex
 }
 
 // services is a KV map with service name as the key and a map of records as the value
 type services map[string]map[string]*record
 
 // NewRegister returns an initialized in-memory register
-func NewRegister(opts ...register.Option) register.Register {
+func NewRegister(opts ...Option) Register {
 	r := &memory{
-		opts:     register.NewOptions(opts...),
+		opts:     NewOptions(opts...),
 		records:  make(map[string]services),
 		watchers: make(map[string]*watcher),
 	}
@@ -78,7 +75,7 @@ func (m *memory) ttlPrune() {
 	}
 }
 
-func (m *memory) sendEvent(r *register.Result) {
+func (m *memory) sendEvent(r *Result) {
 	m.RLock()
 	watchers := make([]*watcher, 0, len(m.watchers))
 	for _, w := range m.watchers {
@@ -102,24 +99,14 @@ func (m *memory) sendEvent(r *register.Result) {
 }
 
 func (m *memory) Connect(ctx context.Context) error {
-	select {
-	case <-ctx.Done():
-		return ctx.Err()
-	default:
-	}
 	return nil
 }
 
 func (m *memory) Disconnect(ctx context.Context) error {
-	select {
-	case <-ctx.Done():
-		return ctx.Err()
-	default:
-	}
 	return nil
 }
 
-func (m *memory) Init(opts ...register.Option) error {
+func (m *memory) Init(opts ...Option) error {
 	for _, o := range opts {
 		o(&m.opts)
 	}
@@ -131,20 +118,15 @@ func (m *memory) Init(opts ...register.Option) error {
 	return nil
 }
 
-func (m *memory) Options() register.Options {
+func (m *memory) Options() Options {
 	return m.opts
 }
 
-func (m *memory) Register(ctx context.Context, s *register.Service, opts ...register.RegisterOption) error {
+func (m *memory) Register(ctx context.Context, s *Service, opts ...RegisterOption) error {
-	select {
-	case <-ctx.Done():
-		return ctx.Err()
-	default:
-	}
 	m.Lock()
 	defer m.Unlock()
 
-	options := register.NewRegisterOptions(opts...)
+	options := NewRegisterOptions(opts...)
 
 	// get the services for this domain from the register
 	srvs, ok := m.records[options.Domain]
@@ -154,11 +136,11 @@ func (m *memory) Register(ctx context.Context, s *register.Service, opts ...regi
 
 	// domain is set in metadata so it can be passed to watchers
 	if s.Metadata == nil {
-		s.Metadata = metadata.New(0)
+		s.Metadata = map[string]string{"domain": options.Domain}
+	} else {
+		s.Metadata["domain"] = options.Domain
 	}
 
-	s.Metadata.Set("domain", options.Domain)
-
 	// ensure the service name exists
 	r := serviceToRecord(s, options.TTL)
 	if _, ok := srvs[s.Name]; !ok {
@@ -171,7 +153,7 @@ func (m *memory) Register(ctx context.Context, s *register.Service, opts ...regi
 			m.opts.Logger.Debug(m.opts.Context, "register added new service: "+s.Name+", version "+s.Version)
 		}
 		m.records[options.Domain] = srvs
-		go m.sendEvent(&register.Result{Action: "create", Service: s})
+		go m.sendEvent(&Result{Action: "create", Service: s})
 	}
 
 	var addedNodes bool
@@ -182,12 +164,19 @@ func (m *memory) Register(ctx context.Context, s *register.Service, opts ...regi
 			continue
 		}
 
-		metadata := metadata.Copy(n.Metadata)
+		metadata := make(map[string]string, len(n.Metadata))
-		metadata.Set("domain", options.Domain)
+
+		// make copy of metadata
+		for k, v := range n.Metadata {
+			metadata[k] = v
+		}
+
+		// set the domain
+		metadata["domain"] = options.Domain
 
 		// add the node
 		srvs[s.Name][s.Version].Nodes[n.ID] = &node{
-			Node: &register.Node{
+			Node: &Node{
 				ID:       n.ID,
 				Address:  n.Address,
 				Metadata: metadata,
@@ -203,7 +192,7 @@ func (m *memory) Register(ctx context.Context, s *register.Service, opts ...regi
 		if m.opts.Logger.V(logger.DebugLevel) {
 			m.opts.Logger.Debug(m.opts.Context, "register added new node to service: "+s.Name+", version "+s.Version)
 		}
-		go m.sendEvent(&register.Result{Action: "update", Service: s})
+		go m.sendEvent(&Result{Action: "update", Service: s})
 	} else {
 		// refresh TTL and timestamp
 		for _, n := range s.Nodes {
@@ -219,17 +208,18 @@ func (m *memory) Register(ctx context.Context, s *register.Service, opts ...regi
 	return nil
 }
 
-func (m *memory) Deregister(ctx context.Context, s *register.Service, opts ...register.DeregisterOption) error {
+func (m *memory) Deregister(ctx context.Context, s *Service, opts ...DeregisterOption) error {
 	m.Lock()
 	defer m.Unlock()
 
-	options := register.NewDeregisterOptions(opts...)
+	options := NewDeregisterOptions(opts...)
 
 	// domain is set in metadata so it can be passed to watchers
 	if s.Metadata == nil {
-		s.Metadata = metadata.New(0)
+		s.Metadata = map[string]string{"domain": options.Domain}
+	} else {
+		s.Metadata["domain"] = options.Domain
 	}
-	s.Metadata.Set("domain", options.Domain)
 
 	// if the domain doesn't exist, there is nothing to deregister
 	services, ok := m.records[options.Domain]
@@ -262,7 +252,7 @@ func (m *memory) Deregister(ctx context.Context, s *register.Service, opts ...re
 	// is cleanup
 	if len(version.Nodes) > 0 {
 		m.records[options.Domain][s.Name][s.Version] = version
-		go m.sendEvent(&register.Result{Action: "update", Service: s})
+		go m.sendEvent(&Result{Action: "update", Service: s})
 		return nil
 	}
 
@@ -270,7 +260,7 @@ func (m *memory) Deregister(ctx context.Context, s *register.Service, opts ...re
 	// register and exit
 	if len(versions) == 1 {
 		delete(m.records[options.Domain], s.Name)
-		go m.sendEvent(&register.Result{Action: "delete", Service: s})
+		go m.sendEvent(&Result{Action: "delete", Service: s})
 
 		if m.opts.Logger.V(logger.DebugLevel) {
 			m.opts.Logger.Debug(m.opts.Context, "register removed service: "+s.Name)
@@ -280,7 +270,7 @@ func (m *memory) Deregister(ctx context.Context, s *register.Service, opts ...re
 
 	// there are other versions of the service running, so only remove this version of it
 	delete(m.records[options.Domain][s.Name], s.Version)
-	go m.sendEvent(&register.Result{Action: "delete", Service: s})
+	go m.sendEvent(&Result{Action: "delete", Service: s})
 	if m.opts.Logger.V(logger.DebugLevel) {
 		m.opts.Logger.Debug(m.opts.Context, "register removed service: "+s.Name+", version "+s.Version)
 	}
@@ -288,20 +278,20 @@ func (m *memory) Deregister(ctx context.Context, s *register.Service, opts ...re
 	return nil
 }
 
-func (m *memory) LookupService(ctx context.Context, name string, opts ...register.LookupOption) ([]*register.Service, error) {
+func (m *memory) LookupService(ctx context.Context, name string, opts ...LookupOption) ([]*Service, error) {
-	options := register.NewLookupOptions(opts...)
+	options := NewLookupOptions(opts...)
 
 	// if it's a wildcard domain, return from all domains
-	if options.Domain == register.WildcardDomain {
+	if options.Domain == WildcardDomain {
 		m.RLock()
 		recs := m.records
 		m.RUnlock()
 
-		var services []*register.Service
+		var services []*Service
 
 		for domain := range recs {
-			srvs, err := m.LookupService(ctx, name, append(opts, register.LookupDomain(domain))...)
+			srvs, err := m.LookupService(ctx, name, append(opts, LookupDomain(domain))...)
-			if err == register.ErrNotFound {
+			if err == ErrNotFound {
 				continue
 			} else if err != nil {
 				return nil, err
@@ -310,7 +300,7 @@ func (m *memory) LookupService(ctx context.Context, name string, opts ...registe
 		}
 
 		if len(services) == 0 {
-			return nil, register.ErrNotFound
+			return nil, ErrNotFound
 		}
 		return services, nil
 	}
@@ -321,17 +311,17 @@ func (m *memory) LookupService(ctx context.Context, name string, opts ...registe
 	// check the domain exists
 	services, ok := m.records[options.Domain]
 	if !ok {
-		return nil, register.ErrNotFound
+		return nil, ErrNotFound
 	}
 
 	// check the service exists
 	versions, ok := services[name]
 	if !ok || len(versions) == 0 {
-		return nil, register.ErrNotFound
+		return nil, ErrNotFound
 	}
 
 	// serialize the response
-	result := make([]*register.Service, len(versions))
+	result := make([]*Service, len(versions))
 
 	var i int
 
@@ -343,19 +333,19 @@ func (m *memory) LookupService(ctx context.Context, name string, opts ...registe
 	return result, nil
 }
 
-func (m *memory) ListServices(ctx context.Context, opts ...register.ListOption) ([]*register.Service, error) {
+func (m *memory) ListServices(ctx context.Context, opts ...ListOption) ([]*Service, error) {
-	options := register.NewListOptions(opts...)
+	options := NewListOptions(opts...)
 
 	// if it's a wildcard domain, list from all domains
-	if options.Domain == register.WildcardDomain {
+	if options.Domain == WildcardDomain {
 		m.RLock()
 		recs := m.records
 		m.RUnlock()
 
-		var services []*register.Service
+		var services []*Service
 
 		for domain := range recs {
-			srvs, err := m.ListServices(ctx, append(opts, register.ListDomain(domain))...)
+			srvs, err := m.ListServices(ctx, append(opts, ListDomain(domain))...)
 			if err != nil {
 				return nil, err
 			}
@@ -371,11 +361,11 @@ func (m *memory) ListServices(ctx context.Context, opts ...register.ListOption)
 	// ensure the domain exists
 	services, ok := m.records[options.Domain]
 	if !ok {
-		return make([]*register.Service, 0), nil
+		return make([]*Service, 0), nil
 	}
 
 	// serialize the result, each version counts as an individual service
-	var result []*register.Service
+	var result []*Service
 
 	for _, service := range services {
 		for _, version := range service {
@@ -386,16 +376,16 @@ func (m *memory) ListServices(ctx context.Context, opts ...register.ListOption)
 	return result, nil
 }
 
-func (m *memory) Watch(ctx context.Context, opts ...register.WatchOption) (register.Watcher, error) {
+func (m *memory) Watch(ctx context.Context, opts ...WatchOption) (Watcher, error) {
 	id, err := id.New()
 	if err != nil {
 		return nil, err
 	}
-	wo := register.NewWatchOptions(opts...)
+	wo := NewWatchOptions(opts...)
 	// construct the watcher
 	w := &watcher{
 		exit: make(chan bool),
-		res:  make(chan *register.Result),
+		res:  make(chan *Result),
 		id:   id,
 		wo:   wo,
 	}
@@ -416,13 +406,13 @@ func (m *memory) String() string {
 }
 
 type watcher struct {
-	res  chan *register.Result
+	res  chan *Result
 	exit chan bool
-	wo   register.WatchOptions
+	wo   WatchOptions
 	id   string
 }
 
-func (m *watcher) Next() (*register.Result, error) {
+func (m *watcher) Next() (*Result, error) {
 	for {
 		select {
 		case r := <-m.res:
@@ -434,28 +424,20 @@ func (m *watcher) Next() (*register.Result, error) {
 				continue
 			}
 
-			if m.wo.Domain == register.WildcardDomain {
-				return r, nil
-			}
-
-			if r.Service.Metadata == nil {
-				continue
-			}
-
 			// extract domain from service metadata
 			var domain string
-			if v, ok := r.Service.Metadata.Get("domain"); ok && v != "" {
+			if r.Service.Metadata != nil && len(r.Service.Metadata["domain"]) > 0 {
-				domain = v
+				domain = r.Service.Metadata["domain"]
 			} else {
-				domain = register.DefaultDomain
+				domain = DefaultDomain
 			}
 
 			// only send the event if watching the wildcard or this specific domain
-			if m.wo.Domain == domain {
+			if m.wo.Domain == WildcardDomain || m.wo.Domain == domain {
 				return r, nil
 			}
 		case <-m.exit:
-			return nil, register.ErrWatcherStopped
+			return nil, ErrWatcherStopped
 		}
 	}
 }
@@ -469,8 +451,11 @@ func (m *watcher) Stop() {
 	}
 }
 
-func serviceToRecord(s *register.Service, ttl time.Duration) *record {
+func serviceToRecord(s *Service, ttl time.Duration) *record {
-	metadata := metadata.Copy(s.Metadata)
+	metadata := make(map[string]string, len(s.Metadata))
+	for k, v := range s.Metadata {
+		metadata[k] = v
+	}
 
 	nodes := make(map[string]*node, len(s.Nodes))
 	for _, n := range s.Nodes {
@@ -481,8 +466,10 @@ func serviceToRecord(s *register.Service, ttl time.Duration) *record {
 		}
 	}
 
-	endpoints := make([]*register.Endpoint, len(s.Endpoints))
+	endpoints := make([]*Endpoint, len(s.Endpoints))
-	copy(endpoints, s.Endpoints)
+	for i, e := range s.Endpoints { // TODO: vtolstov use copy
+		endpoints[i] = e
+	}
 
 	return &record{
 		Name:      s.Name,
@@ -493,14 +480,23 @@ func serviceToRecord(s *register.Service, ttl time.Duration) *record {
 	}
 }
 
-func recordToService(r *record, domain string) *register.Service {
+func recordToService(r *record, domain string) *Service {
-	endpoints := make([]*register.Endpoint, len(r.Endpoints))
+	metadata := make(map[string]string, len(r.Metadata))
-	for i, e := range r.Endpoints {
+	for k, v := range r.Metadata {
-		md := metadata.Copy(e.Metadata)
+		metadata[k] = v
-		// set the domain in metadata so it can be determined when a wildcard query is performed
+	}
-		md.Set("domain", domain)
 
-		endpoints[i] = &register.Endpoint{
+	// set the domain in metadata so it can be determined when a wildcard query is performed
+	metadata["domain"] = domain
+
+	endpoints := make([]*Endpoint, len(r.Endpoints))
+	for i, e := range r.Endpoints {
+		md := make(map[string]string, len(e.Metadata))
+		for k, v := range e.Metadata {
+			md[k] = v
+		}
+
+		endpoints[i] = &Endpoint{
 			Name:     e.Name,
 			Request:  e.Request,
 			Response: e.Response,
@@ -508,21 +504,26 @@ func recordToService(r *record, domain string) *register.Service {
 		}
 	}
 
-	nodes := make([]*register.Node, len(r.Nodes))
+	nodes := make([]*Node, len(r.Nodes))
 	i := 0
 	for _, n := range r.Nodes {
-		nodes[i] = &register.Node{
+		md := make(map[string]string, len(n.Metadata))
+		for k, v := range n.Metadata {
+			md[k] = v
+		}
+
+		nodes[i] = &Node{
 			ID:       n.ID,
 			Address:  n.Address,
-			Metadata: metadata.Copy(n.Metadata),
+			Metadata: md,
 		}
 		i++
 	}
 
-	return &register.Service{
+	return &Service{
 		Name:      r.Name,
 		Version:   r.Version,
-		Metadata:  metadata.Copy(r.Metadata),
+		Metadata:  metadata,
 		Endpoints: endpoints,
 		Nodes:     nodes,
 	}

register/memory_test.go

@@ -1,23 +1,19 @@
-package memory
+package register
 
 import (
 	"context"
 	"fmt"
-	"reflect"
 	"sync"
 	"testing"
 	"time"
-
-	"go.unistack.org/micro/v4"
-	"go.unistack.org/micro/v4/register"
 )
 
-var testData = map[string][]*register.Service{
+var testData = map[string][]*Service{
 	"foo": {
 		{
 			Name:    "foo",
 			Version: "1.0.0",
-			Nodes: []*register.Node{
+			Nodes: []*Node{
 				{
 					ID:      "foo-1.0.0-123",
 					Address: "localhost:9999",
@@ -31,7 +27,7 @@ var testData = map[string][]*register.Service{
 		{
 			Name:    "foo",
 			Version: "1.0.1",
-			Nodes: []*register.Node{
+			Nodes: []*Node{
 				{
 					ID:      "foo-1.0.1-321",
 					Address: "localhost:6666",
@@ -41,7 +37,7 @@ var testData = map[string][]*register.Service{
 		{
 			Name:    "foo",
 			Version: "1.0.3",
-			Nodes: []*register.Node{
+			Nodes: []*Node{
 				{
 					ID:      "foo-1.0.3-345",
 					Address: "localhost:8888",
@@ -53,7 +49,7 @@ var testData = map[string][]*register.Service{
 		{
 			Name:    "bar",
 			Version: "default",
-			Nodes: []*register.Node{
+			Nodes: []*Node{
 				{
 					ID:      "bar-1.0.0-123",
 					Address: "localhost:9999",
@@ -67,7 +63,7 @@ var testData = map[string][]*register.Service{
 		{
 			Name:    "bar",
 			Version: "latest",
-			Nodes: []*register.Node{
+			Nodes: []*Node{
 				{
 					ID:      "bar-1.0.1-321",
 					Address: "localhost:6666",
@@ -82,7 +78,7 @@ func TestMemoryRegistry(t *testing.T) {
 	ctx := context.TODO()
 	m := NewRegister()
 
-	fn := func(k string, v []*register.Service) {
+	fn := func(k string, v []*Service) {
 		services, err := m.LookupService(ctx, k)
 		if err != nil {
 			t.Errorf("Unexpected error getting service %s: %v", k, err)
@@ -159,8 +155,8 @@ func TestMemoryRegistry(t *testing.T) {
 	for _, v := range testData {
 		for _, service := range v {
 			services, err := m.LookupService(ctx, service.Name)
-			if err != register.ErrNotFound {
+			if err != ErrNotFound {
-				t.Errorf("Expected error: %v, got: %v", register.ErrNotFound, err)
+				t.Errorf("Expected error: %v, got: %v", ErrNotFound, err)
 			}
 			if len(services) != 0 {
 				t.Errorf("Expected %d services for %s, got %d", 0, service.Name, len(services))
@@ -175,7 +171,7 @@ func TestMemoryRegistryTTL(t *testing.T) {
 
 	for _, v := range testData {
 		for _, service := range v {
-			if err := m.Register(ctx, service, register.RegisterTTL(time.Millisecond)); err != nil {
+			if err := m.Register(ctx, service, RegisterTTL(time.Millisecond)); err != nil {
 				t.Fatal(err)
 			}
 		}
@@ -204,7 +200,7 @@ func TestMemoryRegistryTTLConcurrent(t *testing.T) {
 	ctx := context.TODO()
 	for _, v := range testData {
 		for _, service := range v {
-			if err := m.Register(ctx, service, register.RegisterTTL(waitTime/2)); err != nil {
+			if err := m.Register(ctx, service, RegisterTTL(waitTime/2)); err != nil {
 				t.Fatal(err)
 			}
 		}
@@ -253,41 +249,34 @@ func TestMemoryWildcard(t *testing.T) {
 	m := NewRegister()
 	ctx := context.TODO()
 
-	if err := m.Init(); err != nil {
+	testSrv := &Service{Name: "foo", Version: "1.0.0"}
-		t.Fatal(err)
-	}
 
-	if err := m.Connect(ctx); err != nil {
+	if err := m.Register(ctx, testSrv, RegisterDomain("one")); err != nil {
-		t.Fatal(err)
-	}
-	testSrv := &register.Service{Name: "foo", Version: "1.0.0"}
-
-	if err := m.Register(ctx, testSrv, register.RegisterDomain("one")); err != nil {
 		t.Fatalf("Register err: %v", err)
 	}
-	if err := m.Register(ctx, testSrv, register.RegisterDomain("two")); err != nil {
+	if err := m.Register(ctx, testSrv, RegisterDomain("two")); err != nil {
 		t.Fatalf("Register err: %v", err)
 	}
 
-	if recs, err := m.ListServices(ctx, register.ListDomain("one")); err != nil {
+	if recs, err := m.ListServices(ctx, ListDomain("one")); err != nil {
 		t.Errorf("List err: %v", err)
 	} else if len(recs) != 1 {
 		t.Errorf("Expected 1 record, got %v", len(recs))
 	}
 
-	if recs, err := m.ListServices(ctx, register.ListDomain("*")); err != nil {
+	if recs, err := m.ListServices(ctx, ListDomain("*")); err != nil {
 		t.Errorf("List err: %v", err)
 	} else if len(recs) != 2 {
 		t.Errorf("Expected 2 records, got %v", len(recs))
 	}
 
-	if recs, err := m.LookupService(ctx, testSrv.Name, register.LookupDomain("one")); err != nil {
+	if recs, err := m.LookupService(ctx, testSrv.Name, LookupDomain("one")); err != nil {
 		t.Errorf("Lookup err: %v", err)
 	} else if len(recs) != 1 {
 		t.Errorf("Expected 1 record, got %v", len(recs))
 	}
 
-	if recs, err := m.LookupService(ctx, testSrv.Name, register.LookupDomain("*")); err != nil {
+	if recs, err := m.LookupService(ctx, testSrv.Name, LookupDomain("*")); err != nil {
 		t.Errorf("Lookup err: %v", err)
 	} else if len(recs) != 2 {
 		t.Errorf("Expected 2 records, got %v", len(recs))
@@ -295,16 +284,12 @@ func TestMemoryWildcard(t *testing.T) {
 }
 
 func TestWatcher(t *testing.T) {
-	testSrv := &register.Service{Name: "foo", Version: "1.0.0"}
+	testSrv := &Service{Name: "foo", Version: "1.0.0"}
 
 	ctx := context.TODO()
 	m := NewRegister()
-	if err := m.Init(); err != nil {
+	m.Init()
-		t.Fatal(err)
+	m.Connect(ctx)
-	}
-	if err := m.Connect(ctx); err != nil {
-		t.Fatal(err)
-	}
 	wc, err := m.Watch(ctx)
 	if err != nil {
 		t.Fatalf("cant watch: %v", err)
@@ -335,37 +320,3 @@ func TestWatcher(t *testing.T) {
 		t.Fatal("expected error on Next()")
 	}
 }
-
-func Test_service_Register(t *testing.T) {
-	t.Skip()
-	r := NewRegister()
-
-	type args struct {
-		names []string
-	}
-	tests := []struct {
-		name string
-		opts []micro.Option
-		args args
-		want register.Register
-	}{
-		{
-			name: "service.Register",
-			opts: []micro.Option{micro.Register(r)},
-			args: args{
-				names: []string{"memory"},
-			},
-			want: r,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			s := micro.NewService(tt.opts...)
-
-			if got := s.Register(tt.args.names...); !reflect.DeepEqual(got, tt.want) {
-				t.Errorf("service.Register() = %v, want %v", got, tt.want)
-			}
-		})
-	}
-}

register/noop.go

@@ -1,72 +0,0 @@
-package register
-
-import "context"
-
-type noop struct {
-	opts Options
-}
-
-func NewRegister(opts ...Option) Register {
-	return &noop{
-		opts: NewOptions(opts...),
-	}
-}
-
-func (n *noop) Name() string {
-	return n.opts.Name
-}
-
-func (n *noop) Init(opts ...Option) error {
-	for _, o := range opts {
-		o(&n.opts)
-	}
-	return nil
-}
-
-func (n *noop) Options() Options {
-	return n.opts
-}
-
-func (n *noop) Connect(ctx context.Context) error {
-	return nil
-}
-
-func (n *noop) Disconnect(ctx context.Context) error {
-	return nil
-}
-
-func (n *noop) Register(ctx context.Context, service *Service, option ...RegisterOption) error {
-	return nil
-}
-
-func (n *noop) Deregister(ctx context.Context, service *Service, option ...DeregisterOption) error {
-	return nil
-}
-
-func (n *noop) LookupService(ctx context.Context, s string, option ...LookupOption) ([]*Service, error) {
-	return nil, nil
-}
-
-func (n *noop) ListServices(ctx context.Context, option ...ListOption) ([]*Service, error) {
-	return nil, nil
-}
-
-func (n *noop) Watch(ctx context.Context, opts ...WatchOption) (Watcher, error) {
-	wOpts := NewWatchOptions(opts...)
-
-	return &watcher{wo: wOpts}, nil
-}
-
-func (n *noop) String() string {
-	return "noop"
-}
-
-type watcher struct {
-	wo WatchOptions
-}
-
-func (m *watcher) Next() (*Result, error) {
-	return nil, nil
-}
-
-func (m *watcher) Stop() {}

register/register.go

@@ -4,6 +4,7 @@ package register // import "go.unistack.org/micro/v4/register"
 import (
 	"context"
 	"errors"
+
 	"go.unistack.org/micro/v4/metadata"
 )
 

semconv/broker.go

@@ -17,6 +17,4 @@ var (
 	SubscribeMessageTotal = "subscribe_message_total"
 	// SubscribeMessageInflight specifies meter metric name
 	SubscribeMessageInflight = "subscribe_message_inflight"
-	// BrokerGroupLag specifies broker lag
-	BrokerGroupLag = "broker_lag"
 )

semconv/cache.go

@@ -1,12 +0,0 @@
-package semconv
-
-var (
-	// CacheRequestDurationSeconds specifies meter metric name
-	CacheRequestDurationSeconds = "cache_request_duration_seconds"
-	// ClientRequestLatencyMicroseconds specifies meter metric name
-	CacheRequestLatencyMicroseconds = "cache_request_latency_microseconds"
-	// CacheRequestTotal specifies meter metric name
-	CacheRequestTotal = "cache_request_total"
-	// CacheRequestInflight specifies meter metric name
-	CacheRequestInflight = "cache_request_inflight"
-)

server/noop.go

@@ -112,8 +112,8 @@ func (n *noopServer) Register() error {
 	}
 	n.RUnlock()
 
-	service.Nodes[0].Metadata.Set("protocol", "noop")
+	service.Nodes[0].Metadata["protocol"] = "noop"
-	service.Nodes[0].Metadata.Set("transport", "noop")
+	service.Nodes[0].Metadata["transport"] = service.Nodes[0].Metadata["protocol"]
 	service.Endpoints = endpoints
 
 	n.RLock()

server/options.go

@@ -13,7 +13,6 @@ import (
 	"go.unistack.org/micro/v4/meter"
 	"go.unistack.org/micro/v4/options"
 	"go.unistack.org/micro/v4/register"
-	msync "go.unistack.org/micro/v4/sync"
 	"go.unistack.org/micro/v4/tracer"
 	"go.unistack.org/micro/v4/util/id"
 )
@@ -33,7 +32,7 @@ type Options struct {
 	// Listener may be passed if already created
 	Listener net.Listener
 	// Wait group
-	Wait *msync.WaitGroup
+	Wait *sync.WaitGroup
 	// TLSConfig specifies tls.Config for secure serving
 	TLSConfig *tls.Config
 	// Metadata holds the server metadata
@@ -66,8 +65,6 @@ type Options struct {
 	DeregisterAttempts int
 	// Hooks may contains HandleWrapper or Server func wrapper
 	Hooks options.Hooks
-	// GracefulTimeout timeout for graceful stop server
-	GracefulTimeout time.Duration
 }
 
 // NewOptions returns new options struct with default or passed values
@@ -87,7 +84,6 @@ func NewOptions(opts ...options.Option) Options {
 		Name:             DefaultName,
 		Version:          DefaultVersion,
 		ID:               id.Must(),
-		GracefulTimeout:  DefaultGracefulTimeout,
 	}
 
 	for _, o := range opts {
@@ -147,11 +143,8 @@ func Wait(wg *sync.WaitGroup) options.Option {
 	if wg == nil {
 		wg = new(sync.WaitGroup)
 	}
-
-	wrap := msync.WrapWaitGroup(wg)
-
 	return func(src interface{}) error {
-		return options.Set(src, wrap, ".Wait")
+		return options.Set(src, wg, ".Wait")
 	}
 }
 
@@ -169,12 +162,6 @@ func Listener(nl net.Listener) options.Option {
 	}
 }
 
-func GracefulTimeout(td time.Duration) options.Option {
-	return func(src interface{}) error {
-		return options.Set(src, td, ".GracefulTimeout")
-	}
-}
-
 // HandleOptions struct
 type HandleOptions struct {
 	// Context holds external options

server/registry.go

@@ -77,8 +77,8 @@ func NewRegisterService(s Server) (*register.Service, error) {
 	}
 	node.Metadata = metadata.Copy(opts.Metadata)
 
-	node.Metadata.Set("server", s.String())
+	node.Metadata["server"] = s.String()
-	node.Metadata.Set("register", opts.Register.String())
+	node.Metadata["register"] = opts.Register.String()
 
 	return &register.Service{
 		Name:     opts.Name,

server/server.go

@@ -32,8 +32,6 @@ var (
 	DefaultMaxMsgRecvSize = 1024 * 1024 * 4 // 4Mb
 	// DefaultMaxMsgSendSize holds default max send size
 	DefaultMaxMsgSendSize = 1024 * 1024 * 4 // 4Mb
-	// DefaultGracefulTimeout default time for graceful stop
-	DefaultGracefulTimeout = 5 * time.Second
 )
 
 // Server is a simple micro server abstraction

service.go

@@ -372,71 +372,19 @@ func (s *service) Run() error {
 	return s.Stop()
 }
 
-func getNameIndex(n string, ifaces interface{}) int {
+type nameIface interface {
-	switch values := ifaces.(type) {
+	Name() string
-	case []router.Router:
-		for idx, iface := range values {
-			if iface.Name() == n {
-				return idx
-			}
-		}
-	case []register.Register:
-		for idx, iface := range values {
-			if iface.Name() == n {
-				return idx
-			}
-		}
-	case []store.Store:
-		for idx, iface := range values {
-			if iface.Name() == n {
-				return idx
-			}
-		}
-	case []tracer.Tracer:
-		for idx, iface := range values {
-			if iface.Name() == n {
-				return idx
-			}
-		}
-	case []server.Server:
-		for idx, iface := range values {
-			if iface.Name() == n {
-				return idx
-			}
-		}
-	case []config.Config:
-		for idx, iface := range values {
-			if iface.Name() == n {
-				return idx
-			}
-		}
-	case []meter.Meter:
-		for idx, iface := range values {
-			if iface.Name() == n {
-				return idx
-			}
-		}
-	case []broker.Broker:
-		for idx, iface := range values {
-			if iface.Name() == n {
-				return idx
-			}
-		}
-	case []client.Client:
-		for idx, iface := range values {
-			if iface.Name() == n {
-				return idx
-			}
-		}
-		/*
-			case []logger.Logger:
-					for idx, iface := range values {
-						if iface.Name() == n {
-							return idx
-						}
-					}
-		*/
 }
 
+func getNameIndex(n string, ifaces interface{}) int {
+	values, ok := ifaces.([]interface{})
+	if !ok {
+		return 0
+	}
+	for idx, iface := range values {
+		if ifc, ok := iface.(nameIface); ok && ifc.Name() == n {
+			return idx
+		}
+	}
 	return 0
 }

service_test.go

@@ -1,7 +1,6 @@
 package micro
 
 import (
-	"go.unistack.org/micro/v4/register/memory"
 	"reflect"
 	"testing"
 
@@ -18,18 +17,20 @@ import (
 	"go.unistack.org/micro/v4/tracer"
 )
 
-func TestClient(t *testing.T) {
+type testItem struct {
-	c1 := client.NewClient(options.Name("test1"))
+	name string
-	c2 := client.NewClient(options.Name("test2"))
-
-	svc := NewService(Client(c1, c2))
-	if err := svc.Init(); err != nil {
-		t.Fatal(err)
 }
 
-	x1 := svc.Client("test2")
+func (ti *testItem) Name() string {
-	if x1.Name() != "test2" {
+	return ti.name
-		t.Fatal("invalid client")
+}
+
+func TestGetNameIndex(t *testing.T) {
+	item1 := &testItem{name: "first"}
+	item2 := &testItem{name: "second"}
+	items := []interface{}{item1, item2}
+	if idx := getNameIndex("second", items); idx != 1 {
+		t.Fatalf("getNameIndex func error, item not found")
 	}
 }
 
@@ -426,7 +427,7 @@ func Test_service_Store(t *testing.T) {
 }
 
 func Test_service_Register(t *testing.T) {
-	r := memory.NewRegister()
+	r := register.NewRegister()
 	type fields struct {
 		opts Options
 	}
@@ -445,7 +446,7 @@ func Test_service_Register(t *testing.T) {
 				opts: Options{Registers: []register.Register{r}},
 			},
 			args: args{
-				names: []string{"memory"},
+				names: []string{"noop"},
 			},
 			want: r,
 		},

sync/waitgroup.go

@@ -1,69 +0,0 @@
-package sync
-
-import (
-	"context"
-	"sync"
-)
-
-type WaitGroup struct {
-	wg *sync.WaitGroup
-	c  int
-	mu sync.Mutex
-}
-
-func WrapWaitGroup(wg *sync.WaitGroup) *WaitGroup {
-	g := &WaitGroup{
-		wg: wg,
-	}
-	return g
-}
-
-func NewWaitGroup() *WaitGroup {
-	var wg sync.WaitGroup
-	return WrapWaitGroup(&wg)
-}
-
-func (g *WaitGroup) Add(n int) {
-	g.mu.Lock()
-	g.c += n
-	g.wg.Add(n)
-	g.mu.Unlock()
-}
-
-func (g *WaitGroup) Done() {
-	g.mu.Lock()
-	g.c += -1
-	g.wg.Add(-1)
-	g.mu.Unlock()
-}
-
-func (g *WaitGroup) Wait() {
-	g.wg.Wait()
-}
-
-func (g *WaitGroup) WaitContext(ctx context.Context) {
-	done := make(chan struct{})
-	go func() {
-		g.wg.Wait()
-		close(done)
-	}()
-
-	select {
-	case <-ctx.Done():
-		g.mu.Lock()
-		g.wg.Add(-g.c)
-		<-done
-		g.wg.Add(g.c)
-		g.mu.Unlock()
-		return
-	case <-done:
-		return
-	}
-}
-
-func (g *WaitGroup) Waiters() int {
-	g.mu.Lock()
-	c := g.c
-	g.mu.Unlock()
-	return c
-}

sync/waitgroup_test.go

@@ -1,37 +0,0 @@
-package sync
-
-import (
-	"context"
-	"testing"
-	"time"
-)
-
-func TestWaitGroupContext(t *testing.T) {
-	wg := NewWaitGroup()
-	_ = t
-	wg.Add(1)
-	ctx, cancel := context.WithTimeout(context.TODO(), 1*time.Second)
-	defer cancel()
-	wg.WaitContext(ctx)
-}
-
-func TestWaitGroupReuse(t *testing.T) {
-	wg := NewWaitGroup()
-	defer func() {
-		if wg.Waiters() != 0 {
-			t.Fatal("lost goroutines")
-		}
-	}()
-
-	wg.Add(1)
-	defer wg.Done()
-	ctx, cancel := context.WithTimeout(context.TODO(), 1*time.Second)
-	defer cancel()
-	wg.WaitContext(ctx)
-
-	wg.Add(1)
-	defer wg.Done()
-	ctx, cancel = context.WithTimeout(context.TODO(), 1*time.Second)
-	defer cancel()
-	wg.WaitContext(ctx)
-}

tracer/memory/memory.go

@@ -1,143 +0,0 @@
-package memory
-
-import (
-	"context"
-	"time"
-
-	"go.unistack.org/micro/v4/options"
-	"go.unistack.org/micro/v4/tracer"
-	"go.unistack.org/micro/v4/util/id"
-)
-
-var _ tracer.Tracer = (*Tracer)(nil)
-
-type Tracer struct {
-	opts  tracer.Options
-	spans []tracer.Span
-}
-
-func (t *Tracer) Spans() []tracer.Span {
-	return t.spans
-}
-
-func (t *Tracer) Start(ctx context.Context, name string, opts ...options.Option) (context.Context, tracer.Span) {
-	options := tracer.NewSpanOptions(opts...)
-	span := &Span{
-		name:      name,
-		ctx:       ctx,
-		tracer:    t,
-		kind:      options.Kind,
-		startTime: time.Now(),
-	}
-	span.spanID.s, _ = id.New()
-	span.traceID.s, _ = id.New()
-	if span.ctx == nil {
-		span.ctx = context.Background()
-	}
-	t.spans = append(t.spans, span)
-	return tracer.NewSpanContext(ctx, span), span
-}
-
-func (t *Tracer) Flush(_ context.Context) error {
-	return nil
-}
-
-func (t *Tracer) Init(opts ...options.Option) error {
-	var err error
-	for _, o := range opts {
-		if err = o(&t.opts); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func (t *Tracer) Name() string {
-	return t.opts.Name
-}
-
-type noopStringer struct {
-	s string
-}
-
-func (s noopStringer) String() string {
-	return s.s
-}
-
-type Span struct {
-	ctx        context.Context
-	tracer     tracer.Tracer
-	name       string
-	statusMsg  string
-	startTime  time.Time
-	finishTime time.Time
-	traceID    noopStringer
-	spanID     noopStringer
-	events     []*Event
-	labels     []interface{}
-	logs       []interface{}
-	kind       tracer.SpanKind
-	status     tracer.SpanStatus
-}
-
-func (s *Span) Finish(opts ...options.Option) {
-	s.finishTime = time.Now()
-}
-
-func (s *Span) Context() context.Context {
-	return s.ctx
-}
-
-func (s *Span) Tracer() tracer.Tracer {
-	return s.tracer
-}
-
-type Event struct {
-	name   string
-	labels []interface{}
-}
-
-func (s *Span) AddEvent(name string, opts ...options.Option) {
-	options := tracer.NewEventOptions(opts...)
-	s.events = append(s.events, &Event{name: name, labels: options.Labels})
-}
-
-func (s *Span) SetName(name string) {
-	s.name = name
-}
-
-func (s *Span) AddLogs(kv ...interface{}) {
-	s.logs = append(s.logs, kv...)
-}
-
-func (s *Span) AddLabels(kv ...interface{}) {
-	s.labels = append(s.labels, kv...)
-}
-
-func (s *Span) Kind() tracer.SpanKind {
-	return s.kind
-}
-
-func (s *Span) TraceID() string {
-	return s.traceID.String()
-}
-
-func (s *Span) SpanID() string {
-	return s.spanID.String()
-}
-
-func (s *Span) Status() (tracer.SpanStatus, string) {
-	return s.status, s.statusMsg
-}
-
-func (s *Span) SetStatus(st tracer.SpanStatus, msg string) {
-	s.status = st
-	s.statusMsg = msg
-}
-
-// NewTracer returns new memory tracer
-func NewTracer(opts ...options.Option) *Tracer {
-	return &Tracer{
-		opts: tracer.NewOptions(opts...),
-	}
-}

tracer/memory/memory_test.go

@@ -1,38 +0,0 @@
-package memory
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"strings"
-	"testing"
-
-	"go.unistack.org/micro/v4/logger"
-	"go.unistack.org/micro/v4/logger/slog"
-	"go.unistack.org/micro/v4/tracer"
-)
-
-func TestLoggerWithTracer(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	logger.DefaultLogger = slog.NewLogger(logger.WithOutput(buf))
-
-	if err := logger.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"))
-
-	if !strings.Contains(buf.String(), span.TraceID()) {
-		t.Fatalf("log does not contains trace id: %s", buf.Bytes())
-	}
-
-	_, _ = tr.Start(ctx, "test2")
-
-	for _, s := range tr.Spans() {
-		_ = s
-	}
-}

tracer/noop.go

@@ -24,10 +24,11 @@ func (t *noopTracer) Start(ctx context.Context, name string, opts ...options.Opt
 		name:   name,
 		ctx:    ctx,
 		tracer: t,
+		labels: options.Labels,
 		kind:   options.Kind,
 	}
-	span.spanID.s, _ = id.New()
+	span.spanID, _ = id.New()
-	span.traceID.s, _ = id.New()
+	span.traceID, _ = id.New()
 	if span.ctx == nil {
 		span.ctx = context.Background()
 	}
@@ -35,7 +36,7 @@ func (t *noopTracer) Start(ctx context.Context, name string, opts ...options.Opt
 	return NewSpanContext(ctx, span), span
 }
 
-func (t *noopTracer) Flush(_ context.Context) error {
+func (t *noopTracer) Flush(ctx context.Context) error {
 	return nil
 }
 
@@ -50,12 +51,9 @@ func (t *noopTracer) Name() string {
 	return t.opts.Name
 }
 
-type noopStringer struct {
+type noopEvent struct {
-	s string
+	name   string
-}
+	labels []interface{}
-
-func (s noopStringer) String() string {
-	return s.s
 }
 
 type noopSpan struct {
@@ -63,13 +61,16 @@ type noopSpan struct {
 	tracer    Tracer
 	name      string
 	statusMsg string
-	traceID   noopStringer
+	events    []*noopEvent
-	spanID    noopStringer
+	labels    []interface{}
+	logs      []interface{}
 	kind      SpanKind
 	status    SpanStatus
+	traceID   string
+	spanID    string
 }
 
-func (s *noopSpan) Finish(_ ...options.Option) {
+func (s *noopSpan) Finish(opts ...options.Option) {
 }
 
 func (s *noopSpan) Context() context.Context {
@@ -80,17 +81,21 @@ func (s *noopSpan) Tracer() Tracer {
 	return s.tracer
 }
 
-func (s *noopSpan) AddEvent(_ string, _ ...options.Option) {
+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) AddLogs(_ ...interface{}) {
+func (s *noopSpan) AddLogs(kv ...interface{}) {
+	s.logs = append(s.logs, kv...)
 }
 
-func (s *noopSpan) AddLabels(_ ...interface{}) {
+func (s *noopSpan) AddLabels(kv ...interface{}) {
+	s.labels = append(s.labels, kv...)
 }
 
 func (s *noopSpan) Kind() SpanKind {
@@ -98,11 +103,11 @@ func (s *noopSpan) Kind() SpanKind {
 }
 
 func (s *noopSpan) TraceID() string {
-	return s.traceID.String()
+	return s.traceID
 }
 
 func (s *noopSpan) SpanID() string {
-	return s.spanID.String()
+	return s.spanID
 }
 
 func (s *noopSpan) Status() (SpanStatus, string) {

tracer/options.go

@@ -172,7 +172,6 @@ func NewEventOptions(opts ...options.Option) EventOptions {
 func NewOptions(opts ...options.Option) Options {
 	options := Options{
 		Logger: logger.DefaultLogger,
-		Context: context.Background(),
 	}
 	for _, o := range opts {
 		o(&options)

tracer/tracer.go

@@ -1,8 +1,10 @@
 // Package tracer provides an interface for distributed tracing
-package tracer
+package tracer // import "go.unistack.org/micro/v4/tracer"
 
 import (
 	"context"
+	"fmt"
+	"sort"
 
 	"go.unistack.org/micro/v4/logger"
 	"go.unistack.org/micro/v4/options"
@@ -11,26 +13,6 @@ import (
 // DefaultTracer is the global default tracer
 var DefaultTracer = NewTracer()
 
-var (
-	// TraceIDKey is the key used for the trace id in the log call
-	TraceIDKey = "trace-id"
-	// SpanIDKey is the key used for the span id in the log call
-	SpanIDKey = "span-id"
-)
-
-func init() {
-	logger.DefaultContextAttrFuncs = append(logger.DefaultContextAttrFuncs,
-		func(ctx context.Context) []interface{} {
-			if span, ok := SpanFromContext(ctx); ok {
-				return []interface{}{
-					TraceIDKey, span.TraceID(),
-					SpanIDKey, span.SpanID(),
-				}
-			}
-			return nil
-		})
-}
-
 // Tracer is an interface for distributed tracing
 type Tracer interface {
 	// Name return tracer name
@@ -69,3 +51,46 @@ type Span interface {
 	// SpanID returns span id
 	SpanID() string
 }
+
+func init() {
+	logger.DefaultContextAttrFuncs = append(logger.DefaultContextAttrFuncs, func(ctx context.Context) []interface{} {
+		span, ok := SpanFromContext(ctx)
+		if !ok || span == nil {
+			return nil
+		}
+		return []interface{}{"trace", span.TraceID(), "span", span.SpanID()}
+	})
+}
+
+// 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/tracer_test.go

@@ -1,28 +0,0 @@
-package tracer_test
-
-import (
-	"bytes"
-	"context"
-	"strings"
-	"testing"
-
-	"go.unistack.org/micro/v4/logger"
-	"go.unistack.org/micro/v4/logger/slog"
-	"go.unistack.org/micro/v4/tracer"
-)
-
-func TestLoggerWithTracer(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	logger.DefaultLogger = slog.NewLogger(logger.WithOutput(buf))
-
-	if err := logger.Init(); err != nil {
-		t.Fatal(err)
-	}
-	var span tracer.Span
-	ctx, span = tracer.DefaultTracer.Start(ctx, "test")
-	logger.Info(ctx, "msg")
-	if !strings.Contains(buf.String(), span.TraceID()) {
-		t.Fatalf("log does not contains tracer id")
-	}
-}

util/reflect/reflect.go

@@ -1,7 +1,6 @@
-package reflect
+package reflect // import "go.unistack.org/micro/v4/util/reflect"
 
 import (
-	"encoding/json"
 	"errors"
 	"fmt"
 	"reflect"
@@ -46,23 +45,15 @@ func SliceAppend(b bool) Option {
 
 // Merge merges map[string]interface{} to destination struct
 func Merge(dst interface{}, mp map[string]interface{}, opts ...Option) error {
+	var err error
+	var sval reflect.Value
+	var fname string
+
 	options := Options{}
 	for _, o := range opts {
 		o(&options)
 	}
 
-	if unmarshaler, ok := dst.(json.Unmarshaler); ok {
-		buf, err := json.Marshal(mp)
-		if err == nil {
-			err = unmarshaler.UnmarshalJSON(buf)
-		}
-		return err
-	}
-
-	var err error
-	var sval reflect.Value
-	var fname string
-
 	dviface := reflect.ValueOf(dst)
 	if dviface.Kind() == reflect.Ptr {
 		dviface = dviface.Elem()
@@ -541,9 +532,6 @@ func Equal(src interface{}, dst interface{}, excptFields ...string) bool {
 			}
 			s := srcVal.MapIndex(key)
 			d := dstVal.MapIndex(key)
-			if !s.IsValid() || !d.IsValid() {
-				return false
-			}
 			if !Equal(s.Interface(), d.Interface(), excptFields...) {
 				return false
 			}

util/register/util.go

@@ -109,12 +109,13 @@ func Merge(olist []*register.Service, nlist []*register.Service) []*register.Ser
 				seen = true
 				srv = append(srv, sp)
 				break
-			}
+			} else {
 				sp := &register.Service{}
 				// make copy
 				*sp = *o
 				srv = append(srv, sp)
 			}
+		}
 		if !seen {
 			srv = append(srv, Copy([]*register.Service{n})...)
 		}

util/sort/sort.go

@@ -1,40 +0,0 @@
-package sort
-
-import (
-	"fmt"
-	"sort"
-)
-
-// 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 Uniq(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
-}

util/structfs/metadata_ec2.go

@@ -12,7 +12,7 @@ type EC2Metadata struct {
 			InstanceType       string   `json:"instance-type"`
 			LocalHostname      string   `json:"local-hostname"`
 			LocalIPv4          string   `json:"local-ipv4"`
-			KernelID           int      `json:"kernel-id"`
+			kernelID           int      `json:"kernel-id"`
 			Placement          string   `json:"placement"`
 			AvailabilityZone   string   `json:"availability-zone"`
 			ProductCodes       string   `json:"product-codes"`

util/structfs/structfs.go

@@ -67,9 +67,9 @@ func (fi *fileInfo) Name() string {
 
 func (fi *fileInfo) Mode() os.FileMode {
 	if strings.HasSuffix(fi.name, "/") {
-		return os.FileMode(0o755) | os.ModeDir
+		return os.FileMode(0755) | os.ModeDir
 	}
-	return os.FileMode(0o644)
+	return os.FileMode(0644)
 }
 
 func (fi *fileInfo) IsDir() bool {
@@ -112,14 +112,15 @@ func (f *file) Readdir(count int) ([]os.FileInfo, error) {
 func (f *file) Seek(offset int64, whence int) (int64, error) {
 	//	log.Printf("seek %d %d %s\n", offset, whence, f.name)
 	switch whence {
-	case io.SeekStart:
+	case os.SEEK_SET:
 		f.offset = offset
-	case io.SeekCurrent:
+	case os.SEEK_CUR:
 		f.offset += offset
-	case io.SeekEnd:
+	case os.SEEK_END:
 		f.offset = int64(len(f.data)) + offset
 	}
 	return f.offset, nil
+
 }
 
 func (f *file) Stat() (os.FileInfo, error) {

util/structfs/structfs_test.go

@@ -2,7 +2,7 @@ package structfs
 
 import (
 	"encoding/json"
-	"io"
+	"io/ioutil"
 	"net/http"
 	"reflect"
 	"testing"
@@ -82,7 +82,7 @@ func get(path string) ([]byte, error) {
 		return nil, err
 	}
 	defer res.Body.Close()
-	return io.ReadAll(res.Body)
+	return ioutil.ReadAll(res.Body)
 }
 
 func TestAll(t *testing.T) {

util/time/duration_test.go

@@ -35,7 +35,7 @@ func TestUnmarshalJSON(t *testing.T) {
 	err = json.Unmarshal([]byte(`{"ttl":"1y"}`), v)
 	if err != nil {
 		t.Fatal(err)
-	} else if v.TTL != 31622400000000000 {
+	} else if v.TTL != 31536000000000000 {
 		t.Fatalf("invalid duration %v != 31536000000000000", v.TTL)
 	}
 }
@@ -55,7 +55,7 @@ func TestParseDuration(t *testing.T) {
 	if err != nil {
 		t.Fatalf("ParseDuration error: %v", err)
 	}
-	if td.String() != "8784h0m0s" {
+	if td.String() != "8760h0m0s" {
 		t.Fatalf("ParseDuration 1y != 8760h0m0s : %s", td.String())
 	}
 }

util/xpool/pool.go

@@ -1,25 +0,0 @@
-package pool
-
-import "sync"
-
-type Pool[T any] struct {
-	p *sync.Pool
-}
-
-func NewPool[T any](fn func() T) Pool[T] {
-	return Pool[T]{
-		p: &sync.Pool{
-			New: func() interface{} {
-				return fn()
-			},
-		},
-	}
-}
-
-func (p Pool[T]) Get() T {
-	return p.p.Get().(T)
-}
-
-func (p Pool[T]) Put(t T) {
-	p.p.Put(t)
-}

util/xpool/pool_test.go

@@ -1,27 +0,0 @@
-package pool
-
-import (
-	"bytes"
-	"strings"
-	"testing"
-)
-
-func TestBytes(t *testing.T) {
-	p := NewPool(func() *bytes.Buffer { return bytes.NewBuffer(nil) })
-	b := p.Get()
-	b.Write([]byte(`test`))
-	if b.String() != "test" {
-		t.Fatal("pool not works")
-	}
-	p.Put(b)
-}
-
-func TestStrings(t *testing.T) {
-	p := NewPool(func() *strings.Builder { return &strings.Builder{} })
-	b := p.Get()
-	b.Write([]byte(`test`))
-	if b.String() != "test" {
-		t.Fatal("pool not works")
-	}
-	p.Put(b)
-}