Apply Code Coverage Badge

Signed-off-by: Василий Толстов <v.tolstov@unistack.org>

.gitea/workflows/job_coverage.yml

@@ -0,0 +1,51 @@
+name: coverage
+
+on:
+  push:
+    branches: [ main, v3, v4 ]
+  pull_request:
+    branches: [ main, v3, v4 ]
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout code
+      uses: actions/checkout@v4
+      with:
+        filter: 'blob:none'
+
+    - name: setup go
+      uses: actions/setup-go@v5
+      with:
+        cache-dependency-path: "**/*.sum"
+        go-version: 'stable' 
+
+    - name: test coverage
+      run: |
+        go test -v -cover ./... -coverprofile coverage.out -coverpkg ./...
+        go tool cover -func coverage.out -o coverage.out
+
+    - name: coverage badge
+      uses: tj-actions/coverage-badge-go@v1
+      with:
+        green: 80
+        filename: coverage.out
+
+    - uses: stefanzweifel/git-auto-commit-action@v4
+      id: auto-commit-action
+      with:
+        commit_message: Apply Code Coverage Badge
+        skip_fetch: true
+        skip_checkout: true
+        file_pattern: ./README.md
+
+    - name: Push Changes
+      if: steps.auto-commit-action.outputs.changes_detected == 'true'
+      uses: ad-m/github-push-action@master
+      with:
+        github_token: ${{ github.token }}
+        branch: ${{ github.ref }}

README.md

@@ -1,4 +1,5 @@
-# Micro [![License](https://img.shields.io/:license-apache-blue.svg)](https://opensource.org/licenses/Apache-2.0) [![Doc](https://img.shields.io/badge/go.dev-reference-007d9c?logo=go&logoColor=white&style=flat-square)](https://pkg.go.dev/github.com/unistack-org/micro/v3?tab=overview) [![Status](https://git.unistack.org/unistack-org/micro/actions/workflows/job_tests.yml/badge.svg?branch=v3)](https://git.unistack.org/unistack-org/micro/actions?query=workflow%3Abuild+branch%3Av3+event%3Apush) [![Lint](https://goreportcard.com/badge/go.unistack.org/micro/v3)](https://goreportcard.com/report/go.unistack.org/micro/v3)
+# Micro 
+![Coverage](https://img.shields.io/badge/Coverage-45.0%25-yellow)
 
 Micro is a standard library for microservices.
 

config/default_test.go

@@ -8,7 +8,6 @@ import (
 	"time"
 
 	"go.unistack.org/micro/v3/config"
-	mid "go.unistack.org/micro/v3/util/id"
 	mtime "go.unistack.org/micro/v3/util/time"
 )
 
@@ -115,8 +114,6 @@ func TestDefault(t *testing.T) {
 
 	if conf.IDValue == "" {
 		t.Fatalf("id value empty")
-	} else if len(conf.IDValue) != mid.DefaultSize {
-		t.Fatalf("id value invalid: %s", conf.IDValue)
 	}
 	_ = conf
 	// t.Logf("%#+v\n", conf)

go.mod

@@ -1,14 +1,14 @@
 module go.unistack.org/micro/v3
 
-go 1.22.0
+go 1.23.4
-
-toolchain go1.23.4
 
 require (
 	dario.cat/mergo v1.0.1
 	github.com/DATA-DOG/go-sqlmock v1.5.0
 	github.com/KimMachineGun/automemlimit v0.6.1
+	github.com/ash3in/uuidv8 v1.0.1
 	github.com/google/uuid v1.6.0
+	github.com/matoous/go-nanoid v1.5.1
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5
 	go.uber.org/automaxprocs v1.6.0

go.sum

@@ -4,6 +4,8 @@ github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20O
 github.com/DATA-DOG/go-sqlmock v1.5.0/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
 github.com/KimMachineGun/automemlimit v0.6.1 h1:ILa9j1onAAMadBsyyUJv5cack8Y1WT26yLj/V+ulKp8=
 github.com/KimMachineGun/automemlimit v0.6.1/go.mod h1:T7xYht7B8r6AG/AqFcUdc7fzd2bIdBKmepfP2S1svPY=
+github.com/ash3in/uuidv8 v1.0.1 h1:dIq1XRkWT8lGA7N5s7WRTB4V3k49WTBLvILz7aCLp80=
+github.com/ash3in/uuidv8 v1.0.1/go.mod h1:EoyUgCtxNBnrnpc9efw5rVN1cQ+LFGCoJiFuD6maOMw=
 github.com/cilium/ebpf v0.16.0 h1:+BiEnHL6Z7lXnlGUsXQPPAE7+kenAd4ES8MQ5min0Ok=
 github.com/cilium/ebpf v0.16.0/go.mod h1:L7u2Blt2jMM/vLAVgjxluxtBKlz3/GWjB0dMOEngfwE=
 github.com/containerd/cgroups/v3 v3.0.4 h1:2fs7l3P0Qxb1nKWuJNFiwhp2CqiKzho71DQkDrHJIo4=
@@ -40,6 +42,8 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/matoous/go-nanoid v1.5.1 h1:aCjdvTyO9LLnTIi0fgdXhOPPvOHjpXN6Ik9DaNjIct4=
+github.com/matoous/go-nanoid v1.5.1/go.mod h1:zyD2a71IubI24efhpvkJz+ZwfwagzgSO6UNiFsZKN7U=
 github.com/mdlayher/netlink v1.7.2 h1:/UtM3ofJap7Vl4QWCPDGXY8d3GIY2UGSDbK+QWmY8/g=
 github.com/mdlayher/netlink v1.7.2/go.mod h1:xraEF7uJbxLhc5fpHL4cPe221LI2bdttWlU+ZGLfQSw=
 github.com/mdlayher/socket v0.4.1 h1:eM9y2/jlbs1M615oshPQOHZzj6R6wMT7bX5NPiQvn2U=
@@ -58,6 +62,7 @@ github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH
 github.com/prashantv/gostub v1.1.0 h1:BTyx3RfQjRHnUWaGF9oQos79AlQ5k8WNktv7VGvVH4g=
 github.com/prashantv/gostub v1.1.0/go.mod h1:A5zLQHz7ieHGG7is6LLXLz7I8+3LZzsrV0P1IAHhP5U=
 github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR38lUII=
+github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
 github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5 h1:G/FZtUu7a6NTWl3KUHMV9jkLAh/Rvtf03NWMHaEDl+E=
 github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=

logger/options.go

@@ -30,7 +30,6 @@ type Options struct {
 	StacktraceKey string
 	// Name holds the logger name
 	Name string
-
 	// Out holds the output writer
 	Out io.Writer
 	// Context holds exernal options
@@ -39,12 +38,10 @@ type Options struct {
 	Meter meter.Meter
 	// TimeFunc used to obtain current time
 	TimeFunc func() time.Time
-
 	// Fields holds additional metadata
 	Fields []interface{}
 	// ContextAttrFuncs contains funcs that executed before log func on context
 	ContextAttrFuncs []ContextAttrFunc
-
 	// callerSkipCount number of frmaes to skip
 	CallerSkipCount int
 	// The logging level the logger should log

logger/slog/slog.go

@@ -2,6 +2,7 @@ package slog
 
 import (
 	"context"
+	"io"
 	"log/slog"
 	"os"
 	"reflect"
@@ -10,6 +11,7 @@ import (
 	"strconv"
 	"sync"
 	"sync/atomic"
+	"time"
 
 	"go.unistack.org/micro/v3/logger"
 	"go.unistack.org/micro/v3/semconv"
@@ -224,6 +226,10 @@ func (s *slogLogger) Error(ctx context.Context, msg string, attrs ...interface{}
 
 func (s *slogLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
 	s.printLog(ctx, logger.FatalLevel, msg, attrs...)
+	if closer, ok := s.opts.Out.(io.Closer); ok {
+		closer.Close()
+	}
+	time.Sleep(1 * time.Second)
 	os.Exit(1)
 }
 
@@ -270,7 +276,7 @@ func (s *slogLogger) printLog(ctx context.Context, lvl logger.Level, msg string,
 		}
 	}
 
-	if s.opts.AddStacktrace && lvl == logger.ErrorLevel {
+	if (s.opts.AddStacktrace || lvl == logger.FatalLevel) || (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)

logger/slog/slog_test.go

@@ -15,6 +15,24 @@ import (
 	"go.unistack.org/micro/v3/metadata"
 )
 
+func TestStacktrace(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(logger.WithLevel(logger.ErrorLevel), logger.WithOutput(buf),
+		WithHandlerFunc(slog.NewTextHandler),
+		logger.WithAddStacktrace(true),
+	)
+	if err := l.Init(logger.WithFields("key1", "val1")); err != nil {
+		t.Fatal(err)
+	}
+
+	l.Error(ctx, "msg1", errors.New("err"))
+
+	if !bytes.Contains(buf.Bytes(), []byte(`slog_test.go:29`)) {
+		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
+	}
+}
+
 func TestWithFields(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)

network/options.go

@@ -119,7 +119,7 @@ func Tracer(t tracer.Tracer) Option {
 // NewOptions returns network default options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		ID:      id.Must(),
+		ID:      id.MustNew(),
 		Name:    "go.micro",
 		Address: ":0",
 		Logger:  logger.DefaultLogger,

network/tunnel/options.go

@@ -164,7 +164,7 @@ func DialWait(b bool) DialOption {
 // NewOptions returns router default options with filled values
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		ID:      id.Must(),
+		ID:      id.MustNew(),
 		Address: DefaultAddress,
 		Token:   DefaultToken,
 		Logger:  logger.DefaultLogger,

router/options.go

@@ -80,7 +80,7 @@ func Name(n string) Option {
 // NewOptions returns router default options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		ID:       id.Must(),
+		ID:       id.MustNew(),
 		Network:  DefaultNetwork,
 		Register: register.DefaultRegister,
 		Logger:   logger.DefaultLogger,

server/options.go

@@ -100,7 +100,7 @@ func NewOptions(opts ...Option) Options {
 		Address:          DefaultAddress,
 		Name:             DefaultName,
 		Version:          DefaultVersion,
-		ID:               id.Must(),
+		ID:               id.MustNew(),
 		Namespace:        DefaultNamespace,
 		GracefulTimeout:  DefaultGracefulTimeout,
 	}

tracer/context.go

@@ -37,6 +37,15 @@ func NewContext(ctx context.Context, tracer Tracer) context.Context {
 
 type spanKey struct{}
 
+// SpanFromContext returns a span from context
+func SpanMustContext(ctx context.Context) Span {
+	sp, ok := SpanFromContext(ctx)
+	if !ok {
+		panic("missing span")
+	}
+	return sp
+}
+
 // SpanFromContext returns a span from context
 func SpanFromContext(ctx context.Context) (Span, bool) {
 	if ctx == nil {

tracer/memory/memory.go

@@ -25,6 +25,7 @@ func (t *Tracer) Start(ctx context.Context, name string, opts ...tracer.SpanOpti
 		name:      name,
 		ctx:       ctx,
 		tracer:    t,
+		labels:    options.Labels,
 		kind:      options.Kind,
 		startTime: time.Now(),
 	}
@@ -37,6 +38,14 @@ func (t *Tracer) Start(ctx context.Context, name string, opts ...tracer.SpanOpti
 	return tracer.NewSpanContext(ctx, span), span
 }
 
+type memoryStringer struct {
+	s string
+}
+
+func (s memoryStringer) String() string {
+	return s.s
+}
+
 func (t *Tracer) Flush(_ context.Context) error {
 	return nil
 }
@@ -52,14 +61,6 @@ 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
@@ -67,8 +68,8 @@ type Span struct {
 	statusMsg  string
 	startTime  time.Time
 	finishTime time.Time
-	traceID    noopStringer
+	traceID    memoryStringer
-	spanID     noopStringer
+	spanID     memoryStringer
 	events     []*Event
 	labels     []interface{}
 	logs       []interface{}

tracer/noop.go

@@ -2,6 +2,7 @@ package tracer
 
 import (
 	"context"
+	"time"
 
 	"go.unistack.org/micro/v3/util/id"
 )
@@ -23,6 +24,7 @@ func (t *noopTracer) Start(ctx context.Context, name string, opts ...SpanOption)
 		name:      name,
 		ctx:       ctx,
 		tracer:    t,
+		startTime: time.Now(),
 		labels:    options.Labels,
 		kind:      options.Kind,
 	}
@@ -31,7 +33,6 @@ func (t *noopTracer) Start(ctx context.Context, name string, opts ...SpanOption)
 	if span.ctx == nil {
 		span.ctx = context.Background()
 	}
-	t.spans = append(t.spans, span)
 	return NewSpanContext(ctx, span), span
 }
 
@@ -58,21 +59,16 @@ func (t *noopTracer) Name() string {
 	return t.opts.Name
 }
 
-type noopEvent struct {
-	name   string
-	labels []interface{}
-}
-
 type noopSpan struct {
 	ctx        context.Context
 	tracer     Tracer
 	name       string
 	statusMsg  string
+	startTime  time.Time
+	finishTime time.Time
 	traceID    noopStringer
 	spanID     noopStringer
-	events    []*noopEvent
 	labels     []interface{}
-	logs      []interface{}
 	kind       SpanKind
 	status     SpanStatus
 }
@@ -86,6 +82,7 @@ func (s *noopSpan) SpanID() string {
 }
 
 func (s *noopSpan) Finish(_ ...SpanOption) {
+	s.finishTime = time.Now()
 }
 
 func (s *noopSpan) Context() context.Context {
@@ -97,8 +94,6 @@ func (s *noopSpan) Tracer() Tracer {
 }
 
 func (s *noopSpan) AddEvent(name string, opts ...EventOption) {
-	options := NewEventOptions(opts...)
-	s.events = append(s.events, &noopEvent{name: name, labels: options.Labels})
 }
 
 func (s *noopSpan) SetName(name string) {
@@ -106,7 +101,6 @@ func (s *noopSpan) SetName(name string) {
 }
 
 func (s *noopSpan) AddLogs(kv ...interface{}) {
-	s.logs = append(s.logs, kv...)
 }
 
 func (s *noopSpan) AddLabels(kv ...interface{}) {

util/id/LICENSE

@@ -1,22 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2018-2021 Matous Dzivjak <matousdzivjak@gmail.com>
-Copyright (c) 2021 Unistack LLC <v.tolstov@unistack.org>
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.

util/id/id.go

@@ -1,112 +1,154 @@
 package id
 
 import (
-	"context"
 	"crypto/rand"
+	"encoding/binary"
 	"errors"
-	"math"
+	"fmt"
+	"time"
 
-	"go.unistack.org/micro/v3/logger"
+	uuidv8 "github.com/ash3in/uuidv8"
+	nanoid "github.com/matoous/go-nanoid"
 )
 
-// DefaultAlphabet is the alphabet used for ID characters by default
+var generatedNode [6]byte
-var DefaultAlphabet = []rune("6789BCDFGHJKLMNPQRTWbcdfghjkmnpqrtwz")
 
-// DefaultSize is the size used for ID by default
+func init() {
+	if _, err := rand.Read(generatedNode[:]); err != nil {
+		panic(err)
+	}
+}
+
+type Type int
+
+const (
+	TypeUnspecified Type = iota
+	TypeNanoid
+	TypeUUIDv8
+)
+
+// DefaultNanoidAlphabet is the alphabet used for ID characters by default
+var DefaultNanoidAlphabet = "6789BCDFGHJKLMNPQRTWbcdfghjkmnpqrtwz"
+
+// DefaultNanoidSize is the size used for ID by default
 // To get uuid like collision specify 21
-var DefaultSize = 16
+var DefaultNanoidSize = 16
 
-// getMask generates bit mask used to obtain bits from the random bytes that are used to get index of random character
+type Generator struct {
-// from the alphabet. Example: if the alphabet has 6 = (110)_2 characters it is sufficient to use mask 7 = (111)_2
+	opts Options
-func getMask(alphabetSize int) int {
+}
-	for i := 1; i <= 8; i++ {
+
-		mask := (2 << uint(i)) - 1
+func (g *Generator) MustNew() string {
-		if mask >= alphabetSize-1 {
+	id, err := g.New()
-			return mask
+	if err != nil {
+		panic(err)
 	}
+	return id
+}
+
+func (g *Generator) New() (string, error) {
+	switch g.opts.Type {
+	case TypeNanoid:
+		if len(g.opts.NanoidAlphabet) == 0 || len(g.opts.NanoidAlphabet) > 255 {
+			return "", errors.New("invalid option, NanoidAlphabet must not be empty and contain no more than 255 chars")
 		}
-	return 0
+		if g.opts.NanoidSize <= 0 {
+			return "", errors.New("invalid option, NanoidSize must be positive integer")
+		}
+
+		return nanoid.Generate(g.opts.NanoidAlphabet, g.opts.NanoidSize)
+	case TypeUUIDv8:
+		timestamp := uint64(time.Now().UnixNano())
+		clockSeq := make([]byte, 2)
+		if _, err := rand.Read(clockSeq); err != nil {
+			return "", fmt.Errorf("failed to generate random clock sequence: %w", err)
+		}
+		clockSeqValue := binary.BigEndian.Uint16(clockSeq) & 0x0FFF // Mask to 12 bits
+		return uuidv8.NewWithParams(timestamp, clockSeqValue, g.opts.UUIDNode[:], uuidv8.TimestampBits48)
+	}
+	return "", errors.New("invalid option, Type unspecified")
 }
 
 // New returns new id or error
 func New(opts ...Option) (string, error) {
 	options := NewOptions(opts...)
 
-	if len(options.Alphabet) == 0 || len(options.Alphabet) > 255 {
+	switch options.Type {
-		return "", errors.New("alphabet must not be empty and contain no more than 255 chars")
+	case TypeNanoid:
+		if len(options.NanoidAlphabet) == 0 || len(options.NanoidAlphabet) > 255 {
+			return "", errors.New("invalid option, NanoidAlphabet must not be empty and contain no more than 255 chars")
 		}
-	if options.Size <= 0 {
+		if options.NanoidSize <= 0 {
-		return "", errors.New("size must be positive integer")
+			return "", errors.New("invalid option, NanoidSize must be positive integer")
 		}
 
-	chars := options.Alphabet
+		return nanoid.Generate(options.NanoidAlphabet, options.NanoidSize)
+	case TypeUUIDv8:
+		timestamp := uint64(time.Now().UnixNano())
+		clockSeq := make([]byte, 2)
+		if _, err := rand.Read(clockSeq); err != nil {
+			return "", fmt.Errorf("failed to generate random clock sequence: %w", err)
+		}
+		clockSeqValue := binary.BigEndian.Uint16(clockSeq) & 0x0FFF // Mask to 12 bits
+		return uuidv8.NewWithParams(timestamp, clockSeqValue, options.UUIDNode[:], uuidv8.TimestampBits48)
+	}
 
-	mask := getMask(len(chars))
+	return "", errors.New("invalid option, Type unspecified")
-	// estimate how many random bytes we will need for the ID, we might actually need more but this is tradeoff
-	// between average case and worst case
-	ceilArg := 1.6 * float64(mask*options.Size) / float64(len(options.Alphabet))
-	step := int(math.Ceil(ceilArg))
-
-	id := make([]rune, options.Size)
-	bytes := make([]byte, step)
-	for j := 0; ; {
-		_, err := rand.Read(bytes)
-		if err != nil {
-			return "", err
-		}
-		for i := 0; i < step; i++ {
-			currByte := bytes[i] & byte(mask)
-			if currByte < byte(len(chars)) {
-				id[j] = chars[currByte]
-				j++
-				if j == options.Size {
-					return string(id[:options.Size]), nil
-				}
-			}
-		}
-	}
 }
 
 // Must is the same as New but fatals on error
-func Must(opts ...Option) string {
+func MustNew(opts ...Option) string {
 	id, err := New(opts...)
 	if err != nil {
-		logger.DefaultLogger.Fatal(context.TODO(), "Must call is failed", err)
+		panic(err)
 	}
 	return id
 }
 
 // Options contains id deneration options
 type Options struct {
-	Alphabet []rune
+	Type           Type
-	Size     int
+	NanoidAlphabet string
+	NanoidSize     int
+	UUIDNode       [6]byte
 }
 
 // Option func signature
 type Option func(*Options)
 
-// Alphabet specifies alphabet to use
+// WithNanoidAlphabet specifies alphabet to use
-func Alphabet(alphabet string) Option {
+func WithNanoidAlphabet(alphabet string) Option {
 	return func(o *Options) {
-		o.Alphabet = []rune(alphabet)
+		o.NanoidAlphabet = alphabet
 	}
 }
 
-// Size specifies id size
+// WithNanoidSize specifies generated id size
-func Size(size int) Option {
+func WithNanoidSize(size int) Option {
 	return func(o *Options) {
-		o.Size = size
+		o.NanoidSize = size
+	}
+}
+
+// WithUUIDNode specifies node component for UUIDv8
+func WithUUIDNode(node [6]byte) Option {
+	return func(o *Options) {
+		o.UUIDNode = node
 	}
 }
 
 // NewOptions returns new Options struct filled by opts
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Alphabet: DefaultAlphabet,
+		Type:           TypeUUIDv8,
-		Size:     DefaultSize,
+		NanoidAlphabet: DefaultNanoidAlphabet,
+		NanoidSize:     DefaultNanoidSize,
+		UUIDNode:       generatedNode,
 	}
+
 	for _, o := range opts {
 		o(&options)
 	}
+
 	return options
 }

util/id/id_test.go

@@ -0,0 +1,11 @@
+package id
+
+import "testing"
+
+func TestUUIDv8(t *testing.T) {
+	id, err := New()
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Logf("xxx %s\n", id)
+}

util/ring/buffer.go

@@ -113,7 +113,7 @@ func (b *Buffer) Stream() (<-chan *Entry, chan bool) {
 	defer b.Unlock()
 
 	entries := make(chan *Entry, 128)
-	id := id.Must()
+	id := id.MustNew()
 	stop := make(chan bool)
 
 	b.streams[id] = &Stream{