.gitea/workflows/job_coverage.yml

@@ -1,51 +0,0 @@
-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

@@ -1,5 +1,4 @@
-# Micro 
+# 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)
-[![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)![Coverage](https://img.shields.io/badge/Coverage-44.9%25-yellow)
 
 Micro is a standard library for microservices.
 

config/default_test.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"go.unistack.org/micro/v3/config"
+	mid "go.unistack.org/micro/v3/util/id"
 	mtime "go.unistack.org/micro/v3/util/time"
 )
 
@@ -114,6 +115,8 @@ 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 1.23.4
+go 1.22.0
+
+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

@@ -4,8 +4,6 @@ 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=
@@ -42,8 +40,6 @@ 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=
@@ -62,7 +58,6 @@ 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

@@ -30,6 +30,7 @@ type Options struct {
 	StacktraceKey string
 	// Name holds the logger name
 	Name string
+
 	// Out holds the output writer
 	Out io.Writer
 	// Context holds exernal options
@@ -38,10 +39,12 @@ 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

@@ -2,7 +2,6 @@ package slog
 
 import (
 	"context"
-	"io"
 	"log/slog"
 	"os"
 	"reflect"
@@ -11,7 +10,6 @@ import (
 	"strconv"
 	"sync"
 	"sync/atomic"
-	"time"
 
 	"go.unistack.org/micro/v3/logger"
 	"go.unistack.org/micro/v3/semconv"
@@ -226,10 +224,6 @@ 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)
 }
 
@@ -276,7 +270,7 @@ func (s *slogLogger) printLog(ctx context.Context, lvl logger.Level, msg string,
 		}
 	}
 
-	if (s.opts.AddStacktrace || lvl == logger.FatalLevel) || (s.opts.AddStacktrace && lvl == logger.ErrorLevel) {
+	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)

logger/slog/slog_test.go

@@ -15,24 +15,6 @@ 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)

metadata/metadata.go

@@ -68,7 +68,15 @@ func (md Metadata) Iterator() *Iterator {
 }
 
 func (md Metadata) MustGet(key string) string {
-	val, ok := md.Get(key)
+	// fast path
+	val, ok := md[key]
+	if !ok {
+		// slow path
+		val, ok = md[textproto.CanonicalMIMEHeaderKey(key)]
+		if !ok {
+			val, ok = md[strings.ToLower(key)]
+		}
+	}
 	if !ok {
 		panic("missing metadata key")
 	}
@@ -111,18 +119,11 @@ func (md Metadata) Del(keys ...string) {
 	}
 }
 
-// Copy makes a copy of the metadata
-func (md Metadata) CopyTo(dst Metadata) {
-	for k, v := range md {
-		dst[k] = v
-	}
-}
-
 // Copy makes a copy of the metadata
 func Copy(md Metadata, exclude ...string) Metadata {
 	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
@@ -146,7 +147,7 @@ func Merge(omd Metadata, mmd Metadata, overwrite bool) Metadata {
 		case ok && !overwrite:
 			continue
 		case val != "":
-			nmd[key] = val
+			nmd.Set(key, val)
 		case ok && val == "":
 			nmd.Del(key)
 		}
@@ -160,8 +161,6 @@ func Pairs(kv ...string) (Metadata, bool) {
 		return nil, false
 	}
 	md := New(len(kv) / 2)
-	for idx := 0; idx < len(kv); idx += 2 {
+	md.Set(kv...)
-		md[kv[idx]] = kv[idx+1]
-	}
 	return md, true
 }

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.MustNew(),
+		ID:      id.Must(),
 		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.MustNew(),
+		ID:      id.Must(),
 		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.MustNew(),
+		ID:       id.Must(),
 		Network:  DefaultNetwork,
 		Register: register.DefaultRegister,
 		Logger:   logger.DefaultLogger,

semconv/metadata.go

@@ -1,18 +0,0 @@
-package semconv
-
-var (
-	// HeaderTopic is the header name that contains topic name
-	HeaderTopic = "Micro-Topic"
-	// HeaderContentType specifies content type of message
-	HeaderContentType = "Content-Type"
-	// HeaderEndpoint specifies endpoint in service
-	HeaderEndpoint = "Micro-Endpoint"
-	// HeaderService specifies service
-	HeaderService = "Micro-Service"
-	// HeaderTimeout specifies timeout of operation
-	HeaderTimeout = "Micro-Timeout"
-	// HeaderAuthorization specifies Authorization header
-	HeaderAuthorization = "Authorization"
-	// HeaderXRequestID specifies request id
-	HeaderXRequestID = "X-Request-Id"
-)

server/options.go

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

tracer/context.go

@@ -37,15 +37,6 @@ 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

@@ -25,7 +25,6 @@ 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(),
 	}
@@ -38,14 +37,6 @@ 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
 }
@@ -61,6 +52,14 @@ 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
@@ -68,8 +67,8 @@ type Span struct {
 	statusMsg  string
 	startTime  time.Time
 	finishTime time.Time
-	traceID    memoryStringer
+	traceID    noopStringer
-	spanID     memoryStringer
+	spanID     noopStringer
 	events     []*Event
 	labels     []interface{}
 	logs       []interface{}

tracer/noop.go

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

@@ -0,0 +1,22 @@
+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

@@ -1,154 +1,112 @@
 package id
 
 import (
+	"context"
 	"crypto/rand"
-	"encoding/binary"
 	"errors"
-	"fmt"
+	"math"
-	"time"
 
-	uuidv8 "github.com/ash3in/uuidv8"
+	"go.unistack.org/micro/v3/logger"
-	nanoid "github.com/matoous/go-nanoid"
 )
 
-var generatedNode [6]byte
+// DefaultAlphabet is the alphabet used for ID characters by default
+var DefaultAlphabet = []rune("6789BCDFGHJKLMNPQRTWbcdfghjkmnpqrtwz")
 
-func init() {
+// DefaultSize is the size used for ID by default
-	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 DefaultNanoidSize = 16
+var DefaultSize = 16
 
-type Generator struct {
+// getMask generates bit mask used to obtain bits from the random bytes that are used to get index of random character
-	opts Options
+// from the alphabet. Example: if the alphabet has 6 = (110)_2 characters it is sufficient to use mask 7 = (111)_2
-}
+func getMask(alphabetSize int) int {
-
+	for i := 1; i <= 8; i++ {
-func (g *Generator) MustNew() string {
+		mask := (2 << uint(i)) - 1
-	id, err := g.New()
+		if mask >= alphabetSize-1 {
-	if err != nil {
+			return mask
-		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")
 	}
-		if g.opts.NanoidSize <= 0 {
+	return 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...)
 
-	switch options.Type {
+	if len(options.Alphabet) == 0 || len(options.Alphabet) > 255 {
-	case TypeNanoid:
+		return "", errors.New("alphabet must not be empty and contain no more than 255 chars")
-		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.NanoidSize <= 0 {
+	if options.Size <= 0 {
-			return "", errors.New("invalid option, NanoidSize must be positive integer")
+		return "", errors.New("size must be positive integer")
 	}
 
-		return nanoid.Generate(options.NanoidAlphabet, options.NanoidSize)
+	chars := options.Alphabet
-	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)
-	}
 
-	return "", errors.New("invalid option, Type unspecified")
+	mask := getMask(len(chars))
+	// 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 MustNew(opts ...Option) string {
+func Must(opts ...Option) string {
 	id, err := New(opts...)
 	if err != nil {
-		panic(err)
+		logger.DefaultLogger.Fatal(context.TODO(), "Must call is failed", err)
 	}
 	return id
 }
 
 // Options contains id deneration options
 type Options struct {
-	Type           Type
+	Alphabet []rune
-	NanoidAlphabet string
+	Size     int
-	NanoidSize     int
-	UUIDNode       [6]byte
 }
 
 // Option func signature
 type Option func(*Options)
 
-// WithNanoidAlphabet specifies alphabet to use
+// Alphabet specifies alphabet to use
-func WithNanoidAlphabet(alphabet string) Option {
+func Alphabet(alphabet string) Option {
 	return func(o *Options) {
-		o.NanoidAlphabet = alphabet
+		o.Alphabet = []rune(alphabet)
 	}
 }
 
-// WithNanoidSize specifies generated id size
+// Size specifies id size
-func WithNanoidSize(size int) Option {
+func Size(size int) Option {
 	return func(o *Options) {
-		o.NanoidSize = size
+		o.Size = 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{
-		Type:           TypeUUIDv8,
+		Alphabet: DefaultAlphabet,
-		NanoidAlphabet: DefaultNanoidAlphabet,
+		Size:     DefaultSize,
-		NanoidSize:     DefaultNanoidSize,
-		UUIDNode:       generatedNode,
 	}
-
 	for _, o := range opts {
 		o(&options)
 	}
-
 	return options
 }

util/id/id_test.go

@@ -1,11 +0,0 @@
-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.MustNew()
+	id := id.Must()
 	stop := make(chan bool)
 
 	b.streams[id] = &Stream{