fix lint

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

.github/dependabot.yml

@@ -11,9 +11,16 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
 
   # Maintain dependencies for Golang
   - package-ecosystem: "gomod"
     directory: "/"
     schedule:
       interval: "daily"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,75 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  workflow_run:
+    workflows: ["prbuild"]
+    types:
+      - completed
+  push:
+    branches: [ master ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master ]
+  schedule:
+    - cron: '34 1 * * 0'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1

.github/workflows/dependabot-automerge.yml

@@ -0,0 +1,66 @@
+name: "prautomerge"
+
+on:
+  workflow_run:
+    workflows: ["prbuild"]
+    types:
+      - completed
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  Dependabot-Automerge:
+    runs-on: ubuntu-latest
+    # Contains workaround to execute if dependabot updates the PR by checking for the base branch in the linked PR
+    # The the github.event.workflow_run.event value is 'push' and not 'pull_request'
+    # dont work with multiple workflows when last returns success
+    if: >-
+      github.event.workflow_run.conclusion == 'success'
+      && github.actor == 'dependabot[bot]'
+      && github.event.sender.login == 'dependabot[bot]'
+      && github.event.sender.type == 'Bot'
+      && (github.event.workflow_run.event == 'pull_request'
+          || (github.event.workflow_run.event == 'push' && github.event.workflow_run.pull_requests[0].base.ref == github.event.repository.default_branch ))
+    steps:
+      - name: Approve Changes and Merge changes if label 'dependencies' is set
+        uses: actions/github-script@v5
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            console.log(context.payload.workflow_run);
+            
+            var labelNames = await github.paginate(
+              github.issues.listLabelsOnIssue,
+              {
+                repo: context.repo.repo,
+                owner: context.repo.owner,
+                issue_number: context.payload.workflow_run.pull_requests[0].number,
+              },
+              (response) => response.data.map(
+                (label) => label.name
+              )
+            );
+
+            console.log(labelNames);
+
+            if (labelNames.includes('dependencies')) {
+              console.log('Found label');
+
+              await github.pulls.createReview({
+                repo: context.repo.repo,
+                owner: context.repo.owner,
+                pull_number: context.payload.workflow_run.pull_requests[0].number,
+                event: 'APPROVE'
+              });
+              console.log('Approved PR');
+
+              await github.pulls.merge({
+                repo: context.repo.repo,
+                owner: context.repo.owner,
+                pull_number: context.payload.workflow_run.pull_requests[0].number,
+              });
+
+              console.log('Merged PR');
+            }

SECURITY.md

@@ -0,0 +1,15 @@
+# Security Policy
+
+## Supported Versions
+
+Use this section to tell people about which versions of your project are
+currently being supported with security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 3.7.x   | :white_check_mark: |
+| < 3.7.0 | :x:                |
+
+## Reporting a Vulnerability
+
+If you find any issue, please create github issue in this repo

auth/auth.go

@@ -55,7 +55,7 @@ type Auth interface {
 type Account struct {
 	// Metadata any other associated metadata
 	Metadata metadata.Metadata `json:"metadata"`
-	// ID of the account e.g. email or uuid
+	// ID of the account e.g. email or id
 	ID string `json:"id"`
 	// Type of the account, e.g. service
 	Type string `json:"type"`

auth/noop.go

@@ -1,7 +1,7 @@
 package auth
 
 import (
-	"github.com/google/uuid"
+	"github.com/unistack-org/micro/v3/util/id"
 )
 
 type noopAuth struct {
@@ -61,11 +61,11 @@ func (n *noopAuth) Verify(acc *Account, res *Resource, opts ...VerifyOption) err
 
 // Inspect a token
 func (n *noopAuth) Inspect(token string) (*Account, error) {
-	uid, err := uuid.NewRandom()
+	id, err := id.New()
 	if err != nil {
 		return nil, err
 	}
-	return &Account{ID: uid.String(), Issuer: n.Options().Issuer}, nil
+	return &Account{ID: id, Issuer: n.Options().Issuer}, nil
 }
 
 // Token generation using an account id and secret

broker/memory.go

@@ -4,10 +4,10 @@ import (
 	"context"
 	"sync"
 
-	"github.com/google/uuid"
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/metadata"
 	maddr "github.com/unistack-org/micro/v3/util/addr"
+	"github.com/unistack-org/micro/v3/util/id"
 	mnet "github.com/unistack-org/micro/v3/util/net"
 	"github.com/unistack-org/micro/v3/util/rand"
 )
@@ -114,8 +114,8 @@ func (m *memoryBroker) Publish(ctx context.Context, topic string, msg *Message,
 }
 
 type msgWrapper struct {
-	topic string
 	body  interface{}
+	topic string
 }
 
 func (m *memoryBroker) BatchPublish(ctx context.Context, msgs []*Message, opts ...PublishOption) error {
@@ -180,7 +180,7 @@ func (m *memoryBroker) publish(ctx context.Context, vs []msgWrapper, opts ...Pub
 						beh = sub.opts.BatchErrorHandler
 					}
 					if beh != nil {
-						beh(ms)
+						_ = beh(ms)
 					} else if m.opts.Logger.V(logger.ErrorLevel) {
 						m.opts.Logger.Error(m.opts.Context, err.Error())
 					}
@@ -199,7 +199,7 @@ func (m *memoryBroker) publish(ctx context.Context, vs []msgWrapper, opts ...Pub
 							eh = sub.opts.ErrorHandler
 						}
 						if eh != nil {
-							eh(p)
+							_ = eh(p)
 						} else if m.opts.Logger.V(logger.ErrorLevel) {
 							m.opts.Logger.Error(m.opts.Context, err.Error())
 						}
@@ -224,7 +224,7 @@ func (m *memoryBroker) BatchSubscribe(ctx context.Context, topic string, handler
 	}
 	m.RUnlock()
 
-	id, err := uuid.NewRandom()
+	sid, err := id.New()
 	if err != nil {
 		return nil, err
 	}
@@ -233,7 +233,7 @@ func (m *memoryBroker) BatchSubscribe(ctx context.Context, topic string, handler
 
 	sub := &memorySubscriber{
 		exit:         make(chan bool, 1),
-		id:           id.String(),
+		id:           sid,
 		topic:        topic,
 		batchhandler: handler,
 		opts:         options,
@@ -269,7 +269,7 @@ func (m *memoryBroker) Subscribe(ctx context.Context, topic string, handler Hand
 	}
 	m.RUnlock()
 
-	id, err := uuid.NewRandom()
+	sid, err := id.New()
 	if err != nil {
 		return nil, err
 	}
@@ -278,7 +278,7 @@ func (m *memoryBroker) Subscribe(ctx context.Context, topic string, handler Hand
 
 	sub := &memorySubscriber{
 		exit:    make(chan bool, 1),
-		id:      id.String(),
+		id:      sid,
 		topic:   topic,
 		handler: handler,
 		opts:    options,

broker/memory_test.go

@@ -53,6 +53,7 @@ func TestMemoryBatchBroker(t *testing.T) {
 		t.Fatalf("Unexpected connect error %v", err)
 	}
 }
+
 func TestMemoryBroker(t *testing.T) {
 	b := NewBroker()
 	ctx := context.Background()

broker/options.go

@@ -232,7 +232,7 @@ func SubscribeContext(ctx context.Context) SubscribeOption {
 }
 
 // DisableAutoAck disables auto ack
-// DEPRECATED
+// Deprecated
 func DisableAutoAck() SubscribeOption {
 	return func(o *SubscribeOptions) {
 		o.AutoAck = false

client/noop.go

@@ -173,7 +173,7 @@ func (n *noopClient) NewRequest(service, endpoint string, req interface{}, opts
 }
 
 func (n *noopClient) NewMessage(topic string, msg interface{}, opts ...MessageOption) Message {
-	options := NewMessageOptions(opts...)
+	options := NewMessageOptions(append([]MessageOption{MessageContentType(n.opts.ContentType)}, opts...)...)
 	return &noopMessage{topic: topic, payload: msg, opts: options}
 }
 

client/options.go

@@ -373,7 +373,7 @@ func DialTimeout(d time.Duration) Option {
 }
 
 // WithExchange sets the exchange to route a message through
-// DEPRECATED
+// Deprecated
 func WithExchange(e string) PublishOption {
 	return func(o *PublishOptions) {
 		o.Exchange = e
@@ -514,7 +514,7 @@ func WithSelectOptions(sops ...selector.SelectOption) CallOption {
 }
 
 // WithMessageContentType sets the message content type
-// DEPRECATED
+// Deprecated
 func WithMessageContentType(ct string) MessageOption {
 	return func(o *MessageOptions) {
 		o.ContentType = ct

codec/codec.go

@@ -41,11 +41,11 @@ type MessageType int
 // connection. ReadBody may be called with a nil argument to force the
 // body to be read and discarded.
 type Codec interface {
-	ReadHeader(io.Reader, *Message, MessageType) error
-	ReadBody(io.Reader, interface{}) error
-	Write(io.Writer, *Message, interface{}) error
-	Marshal(interface{}) ([]byte, error)
-	Unmarshal([]byte, interface{}) error
+	ReadHeader(r io.Reader, m *Message, mt MessageType) error
+	ReadBody(r io.Reader, v interface{}) error
+	Write(w io.Writer, m *Message, v interface{}) error
+	Marshal(v interface{}, opts ...Option) ([]byte, error)
+	Unmarshal(b []byte, v interface{}, opts ...Option) error
 	String() string
 }
 

codec/context.go

@@ -0,0 +1,34 @@
+package codec
+
+import (
+	"context"
+)
+
+type codecKey struct{}
+
+// FromContext returns codec from context
+func FromContext(ctx context.Context) (Codec, bool) {
+	if ctx == nil {
+		return nil, false
+	}
+	c, ok := ctx.Value(codecKey{}).(Codec)
+	return c, ok
+}
+
+// NewContext put codec in context
+func NewContext(ctx context.Context, c Codec) context.Context {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	return context.WithValue(ctx, codecKey{}, c)
+}
+
+// SetOption returns a function to setup a context with given value
+func SetOption(k, v interface{}) Option {
+	return func(o *Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, k, v)
+	}
+}

codec/frame.go

@@ -4,3 +4,31 @@ package codec
 type Frame struct {
 	Data []byte
 }
+
+func (m *Frame) MarshalJSON() ([]byte, error) {
+	return m.Data, nil
+}
+
+func (m *Frame) UnmarshalJSON(data []byte) error {
+	m.Data = data
+	return nil
+}
+
+func (m *Frame) ProtoMessage() {}
+
+func (m *Frame) Reset() {
+	*m = Frame{}
+}
+
+func (m *Frame) String() string {
+	return string(m.Data)
+}
+
+func (m *Frame) Marshal() ([]byte, error) {
+	return m.Data, nil
+}
+
+func (m *Frame) Unmarshal(data []byte) error {
+	m.Data = data
+	return nil
+}

codec/noop.go

@@ -5,7 +5,9 @@ import (
 	"io"
 )
 
-type noopCodec struct{}
+type noopCodec struct {
+	opts Options
+}
 
 func (c *noopCodec) ReadHeader(conn io.Reader, m *Message, t MessageType) error {
 	return nil
@@ -69,11 +71,11 @@ func (c *noopCodec) String() string {
 }
 
 // NewCodec returns new noop codec
-func NewCodec() Codec {
-	return &noopCodec{}
+func NewCodec(opts ...Option) Codec {
+	return &noopCodec{opts: NewOptions(opts...)}
 }
 
-func (c *noopCodec) Marshal(v interface{}) ([]byte, error) {
+func (c *noopCodec) Marshal(v interface{}, opts ...Option) ([]byte, error) {
 	if v == nil {
 		return nil, nil
 	}
@@ -96,7 +98,7 @@ func (c *noopCodec) Marshal(v interface{}) ([]byte, error) {
 	return json.Marshal(v)
 }
 
-func (c *noopCodec) Unmarshal(d []byte, v interface{}) error {
+func (c *noopCodec) Unmarshal(d []byte, v interface{}, opts ...Option) error {
 	if v == nil {
 		return nil
 	}

codec/options.go

@@ -1,6 +1,8 @@
 package codec
 
 import (
+	"context"
+
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/meter"
 	"github.com/unistack-org/micro/v3/tracer"
@@ -17,6 +19,10 @@ type Options struct {
 	Logger logger.Logger
 	// Tracer used for tracing
 	Tracer tracer.Tracer
+	// Context stores additional codec options
+	Context context.Context
+	// TagName specifies tag name in struct to control codec
+	TagName string
 	// MaxMsgSize specifies max messages size that reads by codec
 	MaxMsgSize int
 }
@@ -28,6 +34,13 @@ func MaxMsgSize(n int) Option {
 	}
 }
 
+// TagName sets the codec tag name in struct
+func TagName(n string) Option {
+	return func(o *Options) {
+		o.TagName = n
+	}
+}
+
 // Logger sets the logger
 func Logger(l logger.Logger) Option {
 	return func(o *Options) {
@@ -52,10 +65,12 @@ func Meter(m meter.Meter) Option {
 // NewOptions returns new options
 func NewOptions(opts ...Option) Options {
 	options := Options{
+		Context:    context.Background(),
 		Logger:     logger.DefaultLogger,
 		Meter:      meter.DefaultMeter,
 		Tracer:     tracer.DefaultTracer,
 		MaxMsgSize: DefaultMaxMsgSize,
+		TagName:    DefaultTagName,
 	}
 
 	for _, o := range opts {

config/config.go

@@ -4,11 +4,18 @@ package config
 import (
 	"context"
 	"errors"
+	"time"
 )
 
 // DefaultConfig default config
 var DefaultConfig Config = NewConfig()
 
+// DefaultWatcherMinInterval default min interval for poll changes
+var DefaultWatcherMinInterval = 5 * time.Second
+
+// DefaultWatcherMaxInterval default max interval for poll changes
+var DefaultWatcherMaxInterval = 9 * time.Second
+
 var (
 	// ErrCodecMissing is returned when codec needed and not specified
 	ErrCodecMissing = errors.New("codec missing")
@@ -30,15 +37,17 @@ type Config interface {
 	Load(context.Context, ...LoadOption) error
 	// Save config to sources
 	Save(context.Context, ...SaveOption) error
-	// Watch a value for changes
-	//Watch(context.Context) (Watcher, error)
+	// Watch a config for changes
+	Watch(context.Context, ...WatchOption) (Watcher, error)
 	// String returns config type name
 	String() string
 }
 
 // Watcher is the config watcher
 type Watcher interface {
-	// Next() (, error)
+	// Next blocks until update happens or error returned
+	Next() (map[string]interface{}, error)
+	// Stop stops watcher
 	Stop() error
 }
 

config/default.go

@@ -2,6 +2,7 @@ package config
 
 import (
 	"context"
+	"fmt"
 	"reflect"
 	"strconv"
 	"strings"
@@ -41,11 +42,15 @@ func (c *defaultConfig) Load(ctx context.Context, opts ...LoadOption) error {
 		mopts = append(mopts, mergo.WithAppendSlice)
 	}
 
-	src, err := rutil.Zero(c.opts.Struct)
+	dst := c.opts.Struct
+	if options.Struct != nil {
+		dst = options.Struct
+	}
+
+	src, err := rutil.Zero(dst)
 	if err == nil {
-		valueOf := reflect.ValueOf(src)
-		if err = c.fillValues(valueOf); err == nil {
-			err = mergo.Merge(c.opts.Struct, src, mopts...)
+		if err = fillValues(reflect.ValueOf(src), c.opts.StructTag); err == nil {
+			err = mergo.Merge(dst, src, mopts...)
 		}
 	}
 
@@ -63,7 +68,7 @@ func (c *defaultConfig) Load(ctx context.Context, opts ...LoadOption) error {
 }
 
 //nolint:gocyclo
-func (c *defaultConfig) fillValue(value reflect.Value, val string) error {
+func fillValue(value reflect.Value, val string) error {
 	if !rutil.IsEmpty(value) {
 		return nil
 	}
@@ -80,10 +85,10 @@ func (c *defaultConfig) fillValue(value reflect.Value, val string) error {
 			kv := strings.FieldsFunc(nval, func(c rune) bool { return c == '=' })
 			mkey := reflect.Indirect(reflect.New(kt))
 			mval := reflect.Indirect(reflect.New(et))
-			if err := c.fillValue(mkey, kv[0]); err != nil {
+			if err := fillValue(mkey, kv[0]); err != nil {
 				return err
 			}
-			if err := c.fillValue(mval, kv[1]); err != nil {
+			if err := fillValue(mval, kv[1]); err != nil {
 				return err
 			}
 			value.SetMapIndex(mkey, mval)
@@ -93,7 +98,7 @@ func (c *defaultConfig) fillValue(value reflect.Value, val string) error {
 		value.Set(reflect.MakeSlice(reflect.SliceOf(value.Type().Elem()), len(nvals), len(nvals)))
 		for idx, nval := range nvals {
 			nvalue := reflect.Indirect(reflect.New(value.Type().Elem()))
-			if err := c.fillValue(nvalue, nval); err != nil {
+			if err := fillValue(nvalue, nval); err != nil {
 				return err
 			}
 			value.Index(idx).Set(nvalue)
@@ -182,7 +187,7 @@ func (c *defaultConfig) fillValue(value reflect.Value, val string) error {
 	return nil
 }
 
-func (c *defaultConfig) fillValues(valueOf reflect.Value) error {
+func fillValues(valueOf reflect.Value, tname string) error {
 	var values reflect.Value
 
 	if valueOf.Kind() == reflect.Ptr {
@@ -209,7 +214,7 @@ func (c *defaultConfig) fillValues(valueOf reflect.Value) error {
 		switch value.Kind() {
 		case reflect.Struct:
 			value.Set(reflect.Indirect(reflect.New(value.Type())))
-			if err := c.fillValues(value); err != nil {
+			if err := fillValues(value, tname); err != nil {
 				return err
 			}
 			continue
@@ -223,17 +228,17 @@ func (c *defaultConfig) fillValues(valueOf reflect.Value) error {
 				value.Set(reflect.New(value.Type().Elem()))
 			}
 			value = value.Elem()
-			if err := c.fillValues(value); err != nil {
+			if err := fillValues(value, tname); err != nil {
 				return err
 			}
 			continue
 		}
-		tag, ok := field.Tag.Lookup(c.opts.StructTag)
+		tag, ok := field.Tag.Lookup(tname)
 		if !ok {
 			continue
 		}
 
-		if err := c.fillValue(value, tag); err != nil {
+		if err := fillValue(value, tag); err != nil {
 			return err
 		}
 	}
@@ -265,6 +270,10 @@ func (c *defaultConfig) Name() string {
 	return c.opts.Name
 }
 
+func (c *defaultConfig) Watch(ctx context.Context, opts ...WatchOption) (Watcher, error) {
+	return nil, fmt.Errorf("not implemented")
+}
+
 // NewConfig returns new default config source
 func NewConfig(opts ...Option) Config {
 	options := NewOptions(opts...)

config/default_test.go

@@ -47,6 +47,6 @@ func TestDefault(t *testing.T) {
 	if conf.StringValue != "after_load" {
 		t.Fatal("AfterLoad option not working")
 	}
-
-	t.Logf("%#+v\n", conf)
+	_ = conf
+	// t.Logf("%#+v\n", conf)
 }

config/options.go

@@ -2,6 +2,7 @@ package config
 
 import (
 	"context"
+	"time"
 
 	"github.com/unistack-org/micro/v3/codec"
 	"github.com/unistack-org/micro/v3/logger"
@@ -62,6 +63,7 @@ type LoadOption func(o *LoadOptions)
 
 // LoadOptions struct
 type LoadOptions struct {
+	Struct   interface{}
 	Override bool
 	Append   bool
 }
@@ -88,13 +90,29 @@ func LoadAppend(b bool) LoadOption {
 	}
 }
 
+// LoadStruct override struct for loading
+func LoadStruct(src interface{}) LoadOption {
+	return func(o *LoadOptions) {
+		o.Struct = src
+	}
+}
+
 // SaveOption function signature
 type SaveOption func(o *SaveOptions)
 
 // SaveOptions struct
 type SaveOptions struct {
+	Struct interface{}
 }
 
+// SaveStruct override struct for save to config
+func SaveStruct(src interface{}) SaveOption {
+	return func(o *SaveOptions) {
+		o.Struct = src
+	}
+}
+
+// NewSaveOptions fill SaveOptions struct
 func NewSaveOptions(opts ...SaveOption) SaveOptions {
 	options := SaveOptions{}
 	for _, o := range opts {
@@ -186,3 +204,60 @@ func Name(n string) Option {
 		o.Name = n
 	}
 }
+
+// WatchOptions struuct
+type WatchOptions struct {
+	// Context used by non default options
+	Context context.Context
+	// Coalesce multiple events to one
+	Coalesce bool
+	// MinInterval specifies the min time.Duration interval for poll changes
+	MinInterval time.Duration
+	// MaxInterval specifies the max time.Duration interval for poll changes
+	MaxInterval time.Duration
+	// Struct for filling
+	Struct interface{}
+}
+
+type WatchOption func(*WatchOptions)
+
+func NewWatchOptions(opts ...WatchOption) WatchOptions {
+	options := WatchOptions{
+		Context:     context.Background(),
+		MinInterval: DefaultWatcherMinInterval,
+		MaxInterval: DefaultWatcherMaxInterval,
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+	return options
+}
+
+// WatchContext pass context
+func WatchContext(ctx context.Context) WatchOption {
+	return func(o *WatchOptions) {
+		o.Context = ctx
+	}
+}
+
+// WatchCoalesce controls watch event combining
+func WatchCoalesce(b bool) WatchOption {
+	return func(o *WatchOptions) {
+		o.Coalesce = b
+	}
+}
+
+// WatchInterval specifies min and max time.Duration for pulling changes
+func WatchInterval(min, max time.Duration) WatchOption {
+	return func(o *WatchOptions) {
+		o.MinInterval = min
+		o.MaxInterval = max
+	}
+}
+
+// WatchStruct overrides struct for fill
+func WatchStruct(src interface{}) WatchOption {
+	return func(o *WatchOptions) {
+		o.Struct = src
+	}
+}

config/reflect_test.go

@@ -1,26 +0,0 @@
-package config_test
-
-import (
-	"testing"
-
-	rutil "github.com/unistack-org/micro/v3/util/reflect"
-)
-
-type Config struct {
-	SubConfig *SubConfig
-	Config    *Config
-	Value     string
-}
-
-type SubConfig struct {
-	Value string
-}
-
-func TestReflect(t *testing.T) {
-	cfg1 := &Config{Value: "cfg1", Config: &Config{Value: "cfg1_1"}, SubConfig: &SubConfig{Value: "cfg1"}}
-	cfg2, err := rutil.Zero(cfg1)
-	if err != nil {
-		t.Fatal(err)
-	}
-	t.Logf("dst: %#+v\n", cfg2)
-}

errors/errors.go

@@ -37,7 +37,7 @@ var (
 
 // Error type
 type Error struct {
-	// Id holds error id or service, usually someting like my_service or uuid
+	// Id holds error id or service, usually someting like my_service or id
 	Id string
 	// Detail holds some useful details about error
 	Detail string

flow/default.go

@@ -6,13 +6,13 @@ import (
 	"path/filepath"
 	"sync"
 
-	"github.com/google/uuid"
 	"github.com/silas/dag"
 	"github.com/unistack-org/micro/v3/client"
 	"github.com/unistack-org/micro/v3/codec"
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/metadata"
 	"github.com/unistack-org/micro/v3/store"
+	"github.com/unistack-org/micro/v3/util/id"
 )
 
 type microFlow struct {
@@ -149,18 +149,18 @@ func (w *microWorkflow) getSteps(start string, reverse bool) ([][]Step, error) {
 	return steps, nil
 }
 
-func (w *microWorkflow) Abort(ctx context.Context, eid string) error {
-	workflowStore := store.NewNamespaceStore(w.opts.Store, filepath.Join("workflows", eid))
+func (w *microWorkflow) Abort(ctx context.Context, id string) error {
+	workflowStore := store.NewNamespaceStore(w.opts.Store, filepath.Join("workflows", id))
 	return workflowStore.Write(ctx, "status", &codec.Frame{Data: []byte(StatusAborted.String())})
 }
 
-func (w *microWorkflow) Suspend(ctx context.Context, eid string) error {
-	workflowStore := store.NewNamespaceStore(w.opts.Store, filepath.Join("workflows", eid))
+func (w *microWorkflow) Suspend(ctx context.Context, id string) error {
+	workflowStore := store.NewNamespaceStore(w.opts.Store, filepath.Join("workflows", id))
 	return workflowStore.Write(ctx, "status", &codec.Frame{Data: []byte(StatusSuspend.String())})
 }
 
-func (w *microWorkflow) Resume(ctx context.Context, eid string) error {
-	workflowStore := store.NewNamespaceStore(w.opts.Store, filepath.Join("workflows", eid))
+func (w *microWorkflow) Resume(ctx context.Context, id string) error {
+	workflowStore := store.NewNamespaceStore(w.opts.Store, filepath.Join("workflows", id))
 	return workflowStore.Write(ctx, "status", &codec.Frame{Data: []byte(StatusRunning.String())})
 }
 
@@ -176,11 +176,10 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 	}
 	w.Unlock()
 
-	uid, err := uuid.NewRandom()
+	eid, err := id.New()
 	if err != nil {
 		return "", err
 	}
-	eid := uid.String()
 
 	stepStore := store.NewNamespaceStore(w.opts.Store, filepath.Join("steps", eid))
 	workflowStore := store.NewNamespaceStore(w.opts.Store, filepath.Join("workflows", eid))
@@ -265,17 +264,16 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 							}
 							cherr <- serr
 							return
-						} else {
-							if werr := stepStore.Write(ctx, filepath.Join(step.ID(), "rsp"), rsp); werr != nil {
-								w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
-								cherr <- werr
-								return
-							}
-							if werr := stepStore.Write(ctx, filepath.Join(step.ID(), "status"), &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
-								w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
-								cherr <- werr
-								return
-							}
+						}
+						if werr := stepStore.Write(ctx, filepath.Join(step.ID(), "rsp"), rsp); werr != nil {
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+							cherr <- werr
+							return
+						}
+						if werr := stepStore.Write(ctx, filepath.Join(step.ID(), "status"), &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+							cherr <- werr
+							return
 						}
 					}(cstep)
 					wg.Wait()
@@ -299,16 +297,15 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 						}
 						cherr <- serr
 						return
-					} else {
-						if werr := stepStore.Write(ctx, filepath.Join(cstep.ID(), "rsp"), rsp); werr != nil {
-							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
-							cherr <- werr
-							return
-						}
-						if werr := stepStore.Write(ctx, filepath.Join(cstep.ID(), "status"), &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
-							cherr <- werr
-							return
-						}
+					}
+					if werr := stepStore.Write(ctx, filepath.Join(cstep.ID(), "rsp"), rsp); werr != nil {
+						w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+						cherr <- werr
+						return
+					}
+					if werr := stepStore.Write(ctx, filepath.Join(cstep.ID(), "status"), &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
+						cherr <- werr
+						return
 					}
 				}
 			}
@@ -330,7 +327,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 		close(cherr)
 	case <-chstatus:
 		close(chstatus)
-		return uid.String(), nil
+		return eid, nil
 	}
 
 	switch {
@@ -338,20 +335,17 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusAborted.String())}); werr != nil {
 			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
-		break
 	case err == nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
 			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
-		break
 	case err != nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusFailure.String())}); werr != nil {
 			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
-		break
 	}
 
-	return uid.String(), err
+	return eid, err
 }
 
 func NewFlow(opts ...Option) Flow {
@@ -500,10 +494,12 @@ func (s *microCallStep) Execute(ctx context.Context, req *Message, opts ...Execu
 	rsp := &codec.Frame{}
 	copts := []client.CallOption{client.WithRetries(0)}
 	if options.Timeout > 0 {
-		copts = append(copts, client.WithRequestTimeout(options.Timeout), client.WithDialTimeout(options.Timeout))
+		copts = append(copts,
+			client.WithRequestTimeout(options.Timeout),
+			client.WithDialTimeout(options.Timeout))
 	}
 	nctx := metadata.NewOutgoingContext(ctx, req.Header)
-	err := options.Client.Call(nctx, options.Client.NewRequest(s.service, s.method, &codec.Frame{Data: req.Body}), rsp)
+	err := options.Client.Call(nctx, options.Client.NewRequest(s.service, s.method, &codec.Frame{Data: req.Body}), rsp, copts...)
 	if err != nil {
 		return nil, err
 	}
@@ -554,7 +550,7 @@ func (s *microPublishStep) String() string {
 	if s.opts.ID != "" {
 		return s.opts.ID
 	}
-	return fmt.Sprintf("%s", s.topic)
+	return s.topic
 }
 
 func (s *microPublishStep) Name() string {

flow/flow.go

@@ -116,11 +116,11 @@ type Workflow interface {
 	// Steps returns steps slice where parallel steps returned on the same level
 	Steps() ([][]Step, error)
 	// Suspend suspends execution
-	Suspend(ctx context.Context, eid string) error
+	Suspend(ctx context.Context, id string) error
 	// Resume resumes execution
-	Resume(ctx context.Context, eid string) error
+	Resume(ctx context.Context, id string) error
 	// Abort abort execution
-	Abort(ctx context.Context, eid string) error
+	Abort(ctx context.Context, id string) error
 }
 
 // Flow the base interface to interact with workflows

go.mod

@@ -3,11 +3,12 @@ module github.com/unistack-org/micro/v3
 go 1.16
 
 require (
-	github.com/dgrijalva/jwt-go v3.2.0+incompatible
 	github.com/ef-ds/deque v1.0.4
-	github.com/google/uuid v1.3.0
+	github.com/golang-jwt/jwt/v4 v4.1.0
 	github.com/imdario/mergo v0.3.12
 	github.com/patrickmn/go-cache v2.1.0+incompatible
-	github.com/silas/dag v0.0.0-20210121180416-41cf55125c34
-	golang.org/x/net v0.0.0-20210510120150-4163338589ed
+	github.com/silas/dag v0.0.0-20210626123444-3804bac2d6d4
+	github.com/unistack-org/micro-proto v0.0.9
+	golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 )

go.sum

@@ -1,22 +1,37 @@
-github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
-github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/ef-ds/deque v1.0.4 h1:iFAZNmveMT9WERAkqLJ+oaABF9AcVQ5AjXem/hroniI=
 github.com/ef-ds/deque v1.0.4/go.mod h1:gXDnTC3yqvBcHbq2lcExjtAcVrOnJCbMcZXmuj8Z4tg=
-github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
-github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/golang-jwt/jwt/v4 v4.0.0 h1:RAqyYixv1p7uEnocuy8P1nru5wprCh/MH2BIlW5z5/o=
+github.com/golang-jwt/jwt/v4 v4.0.0/go.mod h1:/xlHOz8bRuivTWchD4jCa+NbatV+wEUSzwAxVc6locg=
+github.com/golang-jwt/jwt/v4 v4.1.0 h1:XUgk2Ex5veyVFVeLm0xhusUTQybEbexJXrvPNOKkSY0=
+github.com/golang-jwt/jwt/v4 v4.1.0/go.mod h1:/xlHOz8bRuivTWchD4jCa+NbatV+wEUSzwAxVc6locg=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/imdario/mergo v0.3.12 h1:b6R2BslTbIEToALKP7LxUvijTsNI9TAe80pLWN2g/HU=
 github.com/imdario/mergo v0.3.12/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
 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 v0.0.0-20210121180416-41cf55125c34 h1:vBfVmA5mZhsQa2jr1FOL9nfA37N/jnbBmi5XUfviVTI=
 github.com/silas/dag v0.0.0-20210121180416-41cf55125c34/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
-golang.org/x/net v0.0.0-20210510120150-4163338589ed h1:p9UgmWI9wKpfYmgaV/IZKGdXc5qEK45tDwwwDyjS26I=
-golang.org/x/net v0.0.0-20210510120150-4163338589ed/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+github.com/silas/dag v0.0.0-20210626123444-3804bac2d6d4 h1:fOH64AB0C3ixGf9emky61STvPJL3smxJg+1Zwx1oCdg=
+github.com/silas/dag v0.0.0-20210626123444-3804bac2d6d4/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
+github.com/unistack-org/micro-proto v0.0.9 h1:KrWLS4FUX7UAWNAilQf70uad6ZPf/0EudeddCXllRVc=
+github.com/unistack-org/micro-proto v0.0.9/go.mod h1:Cckwmzd89gvS7ThxzZp9kQR/EOdksFQcsTAtDDyKwrg=
+golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d h1:20cMwl2fHAzkJMEA+8J4JgqBQcQGzbisXo31MIeenXI=
+golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b h1:eB48h3HiRycXNy8E0Gf5e0hv7YT6Kt14L/D73G1fuwo=
+golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

logger/default.go

@@ -11,15 +11,6 @@ import (
 	"time"
 )
 
-func init() {
-	lvl, err := GetLevel(os.Getenv("MICRO_LOG_LEVEL"))
-	if err != nil {
-		lvl = InfoLevel
-	}
-
-	DefaultLogger = NewLogger(WithLevel(lvl))
-}
-
 type defaultLogger struct {
 	enc  *json.Encoder
 	opts Options
@@ -40,7 +31,6 @@ func (l *defaultLogger) Init(opts ...Option) error {
 		l.logFunc = l.opts.Wrappers[i-1].Log(l.logFunc)
 		l.logfFunc = l.opts.Wrappers[i-1].Logf(l.logfFunc)
 	}
-
 	l.Unlock()
 	return nil
 }
@@ -49,6 +39,28 @@ func (l *defaultLogger) String() string {
 	return "micro"
 }
 
+func (l *defaultLogger) Clone(opts ...Option) Logger {
+	newopts := NewOptions(opts...)
+	oldopts := l.opts
+	for _, o := range opts {
+		o(&newopts)
+		o(&oldopts)
+	}
+
+	oldopts.Wrappers = newopts.Wrappers
+	l.Lock()
+	cl := &defaultLogger{opts: oldopts, logFunc: l.logFunc, logfFunc: l.logfFunc}
+	l.Unlock()
+
+	// wrap the Log func
+	for i := len(newopts.Wrappers); i > 0; i-- {
+		cl.logFunc = newopts.Wrappers[i-1].Log(cl.logFunc)
+		cl.logfFunc = newopts.Wrappers[i-1].Logf(cl.logfFunc)
+	}
+
+	return cl
+}
+
 func (l *defaultLogger) V(level Level) bool {
 	l.RLock()
 	ok := l.opts.Level.Enabled(level)
@@ -56,26 +68,26 @@ func (l *defaultLogger) V(level Level) bool {
 	return ok
 }
 
-func (l *defaultLogger) Fields(fields map[string]interface{}) Logger {
-	nl := &defaultLogger{opts: l.opts, enc: l.enc}
-	nl.opts.Fields = make(map[string]interface{}, len(l.opts.Fields)+len(fields))
-	l.RLock()
-	for k, v := range l.opts.Fields {
-		nl.opts.Fields[k] = v
-	}
-	l.RUnlock()
+func (l *defaultLogger) Level(level Level) {
+	l.Lock()
+	l.opts.Level = level
+	l.Unlock()
+}
 
-	for k, v := range fields {
-		nl.opts.Fields[k] = v
+func (l *defaultLogger) Fields(fields ...interface{}) Logger {
+	nl := &defaultLogger{opts: l.opts, enc: l.enc}
+	if len(fields) == 0 {
+		return nl
+	} else if len(fields)%2 != 0 {
+		fields = fields[:len(fields)-1]
 	}
+	nl.opts.Fields = append(nl.opts.Fields, fields...)
 	return nl
 }
 
-func copyFields(src map[string]interface{}) map[string]interface{} {
-	dst := make(map[string]interface{}, len(src))
-	for k, v := range src {
-		dst[k] = v
-	}
+func copyFields(src []interface{}) []interface{} {
+	dst := make([]interface{}, len(src))
+	copy(dst, src)
 	return dst
 }
 
@@ -162,19 +174,23 @@ func (l *defaultLogger) Log(ctx context.Context, level Level, args ...interface{
 	fields := copyFields(l.opts.Fields)
 	l.RUnlock()
 
-	fields["level"] = level.String()
+	fields = append(fields, "level", level.String())
 
 	if _, file, line, ok := runtime.Caller(l.opts.CallerSkipCount); ok {
-		fields["caller"] = fmt.Sprintf("%s:%d", logCallerfilePath(file), line)
+		fields = append(fields, "caller", fmt.Sprintf("%s:%d", logCallerfilePath(file), line))
 	}
+	fields = append(fields, "timestamp", time.Now().Format("2006-01-02 15:04:05"))
 
-	fields["timestamp"] = time.Now().Format("2006-01-02 15:04:05")
 	if len(args) > 0 {
-		fields["msg"] = fmt.Sprint(args...)
+		fields = append(fields, "msg", fmt.Sprint(args...))
 	}
 
+	out := make(map[string]interface{}, len(fields)/2)
+	for i := 0; i < len(fields); i += 2 {
+		out[fields[i].(string)] = fields[i+1]
+	}
 	l.RLock()
-	_ = l.enc.Encode(fields)
+	_ = l.enc.Encode(out)
 	l.RUnlock()
 }
 
@@ -187,30 +203,30 @@ func (l *defaultLogger) Logf(ctx context.Context, level Level, msg string, args
 	fields := copyFields(l.opts.Fields)
 	l.RUnlock()
 
-	fields["level"] = level.String()
+	fields = append(fields, "level", level.String())
 
 	if _, file, line, ok := runtime.Caller(l.opts.CallerSkipCount); ok {
-		fields["caller"] = fmt.Sprintf("%s:%d", logCallerfilePath(file), line)
+		fields = append(fields, "caller", fmt.Sprintf("%s:%d", logCallerfilePath(file), line))
 	}
 
-	fields["timestamp"] = time.Now().Format("2006-01-02 15:04:05")
+	fields = append(fields, "timestamp", time.Now().Format("2006-01-02 15:04:05"))
 	if len(args) > 0 {
-		fields["msg"] = fmt.Sprintf(msg, args...)
+		fields = append(fields, "msg", fmt.Sprintf(msg, args...))
 	} else if msg != "" {
-		fields["msg"] = msg
+		fields = append(fields, "msg", msg)
+	}
+
+	out := make(map[string]interface{}, len(fields)/2)
+	for i := 0; i < len(fields); i += 2 {
+		out[fields[i].(string)] = fields[i+1]
 	}
 	l.RLock()
-	_ = l.enc.Encode(fields)
+	_ = l.enc.Encode(out)
 	l.RUnlock()
 }
 
 func (l *defaultLogger) Options() Options {
-	// not guard against options Context values
-	l.RLock()
-	opts := l.opts
-	opts.Fields = copyFields(l.opts.Fields)
-	l.RUnlock()
-	return opts
+	return l.opts
 }
 
 // NewLogger builds a new logger based on options

logger/level.go

@@ -1,24 +1,20 @@
 package logger
 
-import (
-	"fmt"
-)
-
 // Level means logger level
 type Level int8
 
 const (
-	// TraceLevel level. Designates finer-grained informational events than the Debug.
+	// TraceLevel level usually used to find bugs, very verbose
 	TraceLevel Level = iota - 2
-	// DebugLevel level. Usually only enabled when debugging. Very verbose logging.
+	// DebugLevel level used only when enabled debugging
 	DebugLevel
-	// InfoLevel level. General operational entries about what's going on inside the application.
+	// InfoLevel level used for general info about what's going on inside the application
 	InfoLevel
-	// WarnLevel level. Non-critical entries that deserve eyes.
+	// WarnLevel level used for non-critical entries
 	WarnLevel
-	// ErrorLevel level. Used for errors that should definitely be noted.
+	// ErrorLevel level used for errors that should definitely be noted
 	ErrorLevel
-	// FatalLevel level. Logs and then calls `os.Exit(1)`. highest level of severity.
+	// FatalLevel level used for critical errors and then calls `os.Exit(1)`
 	FatalLevel
 )
 
@@ -38,7 +34,7 @@ func (l Level) String() string {
 	case FatalLevel:
 		return "fatal"
 	}
-	return ""
+	return "info"
 }
 
 // Enabled returns true if the given level is at or above this level.
@@ -46,22 +42,22 @@ func (l Level) Enabled(lvl Level) bool {
 	return lvl >= l
 }
 
-// GetLevel converts a level string into a logger Level value.
-// returns an error if the input string does not match known values.
-func GetLevel(levelStr string) (Level, error) {
-	switch levelStr {
+// ParseLevel converts a level string into a logger Level value.
+// returns an InfoLevel if the input string does not match known values.
+func ParseLevel(lvl string) Level {
+	switch lvl {
 	case TraceLevel.String():
-		return TraceLevel, nil
+		return TraceLevel
 	case DebugLevel.String():
-		return DebugLevel, nil
+		return DebugLevel
 	case InfoLevel.String():
-		return InfoLevel, nil
+		return InfoLevel
 	case WarnLevel.String():
-		return WarnLevel, nil
+		return WarnLevel
 	case ErrorLevel.String():
-		return ErrorLevel, nil
+		return ErrorLevel
 	case FatalLevel.String():
-		return FatalLevel, nil
+		return FatalLevel
 	}
-	return InfoLevel, fmt.Errorf("unknown Level String: '%s', use InfoLevel", levelStr)
+	return InfoLevel
 }

logger/logger.go

@@ -1,11 +1,14 @@
 // Package logger provides a log interface
 package logger
 
-import "context"
+import (
+	"context"
+	"os"
+)
 
 var (
 	// DefaultLogger variable
-	DefaultLogger Logger = NewLogger()
+	DefaultLogger Logger = NewLogger(WithLevel(ParseLevel(os.Getenv("MICRO_LOG_LEVEL"))))
 	// DefaultLevel used by logger
 	DefaultLevel Level = InfoLevel
 	// DefaultCallerSkipCount used by logger
@@ -16,12 +19,16 @@ var (
 type Logger interface {
 	// Init initialises options
 	Init(opts ...Option) error
+	// Clone create logger copy with new options
+	Clone(opts ...Option) Logger
 	// V compare provided verbosity level with current log level
 	V(level Level) bool
+	// Level sets the log level for logger
+	Level(level Level)
 	// The Logger options
 	Options() Options
-	// Fields set fields to always be logged
-	Fields(fields map[string]interface{}) Logger
+	// Fields set fields to always be logged with keyval pairs
+	Fields(fields ...interface{}) Logger
 	// Info level message
 	Info(ctx context.Context, args ...interface{})
 	// Trace level message
@@ -54,6 +61,9 @@ type Logger interface {
 	String() string
 }
 
+// Field contains keyval pair
+type Field interface{}
+
 // Info writes msg to default logger on info level
 func Info(ctx context.Context, args ...interface{}) {
 	DefaultLogger.Info(ctx, args...)
@@ -125,6 +135,6 @@ func Init(opts ...Option) error {
 }
 
 // Fields create logger with specific fields
-func Fields(fields map[string]interface{}) Logger {
-	return DefaultLogger.Fields(fields)
+func Fields(fields ...interface{}) Logger {
+	return DefaultLogger.Fields(fields...)
 }

logger/logger_test.go

@@ -3,9 +3,58 @@ package logger
 import (
 	"bytes"
 	"context"
+	"log"
 	"testing"
 )
 
+func TestClone(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+	nl := l.Clone(WithLevel(ErrorLevel))
+	if err := nl.Init(); err != nil {
+		t.Fatal(err)
+	}
+	nl.Info(ctx, "info message")
+	if len(buf.Bytes()) != 0 {
+		t.Fatal("message must not be logged")
+	}
+	l.Info(ctx, "info message")
+	if len(buf.Bytes()) == 0 {
+		t.Fatal("message must be logged")
+	}
+}
+
+func TestRedirectStdLogger(t *testing.T) {
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+	fn := RedirectStdLogger(l, ErrorLevel)
+	defer fn()
+	log.Print("test")
+	if !bytes.Contains(buf.Bytes(), []byte(`"level":"error","msg":"test","timestamp"`)) {
+		t.Fatalf("logger error, buf %s", buf.Bytes())
+	}
+}
+
+func TestStdLogger(t *testing.T) {
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+	lg := NewStdLogger(l, ErrorLevel)
+	lg.Print("test")
+	if !bytes.Contains(buf.Bytes(), []byte(`"level":"error","msg":"test","timestamp"`)) {
+		t.Fatalf("logger error, buf %s", buf.Bytes())
+	}
+}
+
 func TestLogger(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
@@ -15,7 +64,7 @@ func TestLogger(t *testing.T) {
 	}
 	l.Trace(ctx, "trace_msg1")
 	l.Warn(ctx, "warn_msg1")
-	l.Fields(map[string]interface{}{"error": "test"}).Info(ctx, "error message")
+	l.Fields("error", "test").Info(ctx, "error message")
 	l.Warn(ctx, "first", " ", "second")
 	if !bytes.Contains(buf.Bytes(), []byte(`"level":"trace","msg":"trace_msg1"`)) {
 		t.Fatalf("logger error, buf %s", buf.Bytes())

logger/options.go

@@ -16,7 +16,7 @@ type Options struct {
 	// Context holds exernal options
 	Context context.Context
 	// Fields holds additional metadata
-	Fields map[string]interface{}
+	Fields []interface{}
 	// Name holds the logger name
 	Name string
 	// CallerSkipCount number of frmaes to skip
@@ -31,7 +31,7 @@ type Options struct {
 func NewOptions(opts ...Option) Options {
 	options := Options{
 		Level:           DefaultLevel,
-		Fields:          make(map[string]interface{}),
+		Fields:          make([]interface{}, 0, 6),
 		Out:             os.Stderr,
 		CallerSkipCount: DefaultCallerSkipCount,
 		Context:         context.Background(),
@@ -43,7 +43,7 @@ func NewOptions(opts ...Option) Options {
 }
 
 // WithFields set default fields for the logger
-func WithFields(fields map[string]interface{}) Option {
+func WithFields(fields ...interface{}) Option {
 	return func(o *Options) {
 		o.Fields = fields
 	}

logger/stdlogger.go

@@ -0,0 +1,35 @@
+package logger
+
+import (
+	"bytes"
+	"log"
+)
+
+type stdLogger struct {
+	l     Logger
+	level Level
+}
+
+func NewStdLogger(l Logger, level Level) *log.Logger {
+	return log.New(&stdLogger{l: l, level: level}, "" /* prefix */, 0 /* flags */)
+}
+
+func (sl *stdLogger) Write(p []byte) (int, error) {
+	p = bytes.TrimSpace(p)
+	sl.l.Log(sl.l.Options().Context, sl.level, string(p))
+	return len(p), nil
+}
+
+func RedirectStdLogger(l Logger, level Level) func() {
+	flags := log.Flags()
+	prefix := log.Prefix()
+	writer := log.Writer()
+	log.SetFlags(0)
+	log.SetPrefix("")
+	log.SetOutput(&stdLogger{l: l, level: level})
+	return func() {
+		log.SetFlags(flags)
+		log.SetPrefix(prefix)
+		log.SetOutput(writer)
+	}
+}

logger/wrapper.go

@@ -20,9 +20,7 @@ type Wrapper interface {
 	Logf(LogfFunc) LogfFunc
 }
 
-var (
-	_ Logger = &OmitLogger{}
-)
+var _ Logger = &OmitLogger{}
 
 type OmitLogger struct {
 	l Logger
@@ -40,12 +38,20 @@ func (w *OmitLogger) V(level Level) bool {
 	return w.l.V(level)
 }
 
+func (w *OmitLogger) Level(level Level) {
+	w.l.Level(level)
+}
+
+func (w *OmitLogger) Clone(opts ...Option) Logger {
+	return w.l.Clone(opts...)
+}
+
 func (w *OmitLogger) Options() Options {
 	return w.l.Options()
 }
 
-func (w *OmitLogger) Fields(fields map[string]interface{}) Logger {
-	return w.l.Fields(fields)
+func (w *OmitLogger) Fields(fields ...interface{}) Logger {
+	return w.l.Fields(fields...)
 }
 
 func (w *OmitLogger) Info(ctx context.Context, args ...interface{}) {
@@ -119,23 +125,29 @@ func getArgs(args []interface{}) []interface{} {
 	var err error
 	for _, arg := range args {
 		val := reflect.ValueOf(arg)
-		switch val.Kind() {
-		case reflect.Ptr:
+		if val.Kind() == reflect.Ptr {
 			val = val.Elem()
 		}
 		narg := arg
-		if val.Kind() == reflect.Struct {
-			if narg, err = rutil.Zero(arg); err == nil {
-				rutil.CopyDefaults(narg, arg)
-				if flds, ferr := rutil.StructFields(narg); ferr == nil {
-					for _, fld := range flds {
-						if tv, ok := fld.Field.Tag.Lookup("logger"); ok && tv == "omit" {
-							fld.Value.Set(reflect.Zero(fld.Value.Type()))
-						}
-					}
+		if val.Kind() != reflect.Struct {
+			nargs = append(nargs, narg)
+			continue
+		}
+
+		if narg, err = rutil.Zero(arg); err != nil {
+			nargs = append(nargs, narg)
+			continue
+		}
+
+		rutil.CopyDefaults(narg, arg)
+		if flds, ferr := rutil.StructFields(narg); ferr == nil {
+			for _, fld := range flds {
+				if tv, ok := fld.Field.Tag.Lookup("logger"); ok && tv == "omit" {
+					fld.Value.Set(reflect.Zero(fld.Value.Type()))
 				}
 			}
 		}
+
 		nargs = append(nargs, narg)
 	}
 	return nargs

meter/generate.go

@@ -1,3 +1,12 @@
 package meter
 
-//go:generate protoc -I./handler -I../ -I/home/vtolstov/.cache/go-path/pkg/mod/github.com/unistack-org/micro-proto@v0.0.1 --micro_out=components=micro|http|server,standalone=false,debug=true,paths=source_relative:./handler handler/handler.proto
+//go:generate sh -c "protoc -I./handler -I../ -I$(go list -f '{{ .Dir }}' -m github.com/unistack-org/micro-proto) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./handler handler/handler.proto"
+
+import (
+
+	// import required packages
+	_ "github.com/unistack-org/micro-proto/api"
+
+	// import required packages
+	_ "github.com/unistack-org/micro-proto/openapiv2"
+)

meter/handler/handler.proto

@@ -11,17 +11,17 @@ service Meter {
 	rpc Metrics(micro.codec.Frame) returns (micro.codec.Frame) {
 		option (micro.openapiv2.openapiv2_operation) = {
       operation_id: "Metrics";
-        responses: {
-          key: "default";
+      responses: {
+        response_code: {
+          name: "default";
           value: {
-            description: "Error response";
-            schema: {
-              json_schema: {
-                ref: "micro.codec.Frame";
-              }
-            }
-          }
-        }
+            json_reference: {
+              description: "Error response";
+              _ref: "micro.codec.Frame";
+            };
+          };
+        };
+      };
     };
 		option (micro.api.http) = { get: "/metrics"; };
   };

meter/handler/handler_micro.pb.go

@@ -1,22 +1,31 @@
-// Code generated by protoc-gen-micro
+// Code generated by protoc-gen-go-micro. DO NOT EDIT.
+// protoc-gen-go-micro version: v3.4.2
 // source: handler.proto
+
 package handler
 
 import (
 	context "context"
+
 	api "github.com/unistack-org/micro/v3/api"
 	codec "github.com/unistack-org/micro/v3/codec"
 )
 
-func NewMeterEndpoints() []*api.Endpoint {
-	return []*api.Endpoint{
-		&api.Endpoint{
+var (
+	MeterName = "Meter"
+
+	MeterEndpoints = []api.Endpoint{
+		{
 			Name:    "Meter.Metrics",
 			Path:    []string{"/metrics"},
 			Method:  []string{"GET"},
 			Handler: "rpc",
 		},
 	}
+)
+
+func NewMeterEndpoints() []api.Endpoint {
+	return MeterEndpoints
 }
 
 type MeterServer interface {

meter/handler/handler_micro_http.pb.go

@@ -1,9 +1,12 @@
-// Code generated by protoc-gen-micro
+// Code generated by protoc-gen-go-micro. DO NOT EDIT.
+// protoc-gen-go-micro version: v3.4.2
 // source: handler.proto
+
 package handler
 
 import (
 	context "context"
+
 	api "github.com/unistack-org/micro/v3/api"
 	codec "github.com/unistack-org/micro/v3/codec"
 	server "github.com/unistack-org/micro/v3/server"
@@ -26,8 +29,8 @@ func RegisterMeterServer(s server.Server, sh MeterServer, opts ...server.Handler
 	}
 	h := &meterServer{sh}
 	var nopts []server.HandlerOption
-	for _, endpoint := range NewMeterEndpoints() {
-		nopts = append(nopts, api.WithEndpoint(endpoint))
+	for _, endpoint := range MeterEndpoints {
+		nopts = append(nopts, api.WithEndpoint(&endpoint))
 	}
 	return s.Handle(s.NewHandler(&Meter{h}, append(nopts, opts...)...))
 }

meter/meter_test.go

@@ -33,7 +33,7 @@ func TestBuildLabels(t *testing.T) {
 	}
 
 	data := []testData{
-		testData{
+		{
 			src: []string{"zerolabel", "value3", "firstlabel", "value2"},
 			dst: []string{"firstlabel", "value2", "zerolabel", "value3"},
 		},
@@ -48,15 +48,15 @@ func TestBuildLabels(t *testing.T) {
 
 func TestBuildName(t *testing.T) {
 	data := map[string][]string{
-		`my_metric{firstlabel="value2",zerolabel="value3"}`: []string{
+		`my_metric{firstlabel="value2",zerolabel="value3"}`: {
 			"my_metric",
 			"zerolabel", "value3", "firstlabel", "value2",
 		},
-		`my_metric{broker="broker2",register="mdns",server="tcp"}`: []string{
+		`my_metric{broker="broker2",register="mdns",server="tcp"}`: {
 			"my_metric",
 			"broker", "broker1", "broker", "broker2", "server", "http", "server", "tcp", "register", "mdns",
 		},
-		`my_metric{aaa="aaa"}`: []string{
+		`my_metric{aaa="aaa"}`: {
 			"my_metric",
 			"aaa", "aaa",
 		},

network/options.go

@@ -1,13 +1,13 @@
 package network
 
 import (
-	"github.com/google/uuid"
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/meter"
 	"github.com/unistack-org/micro/v3/network/tunnel"
 	"github.com/unistack-org/micro/v3/proxy"
 	"github.com/unistack-org/micro/v3/router"
 	"github.com/unistack-org/micro/v3/tracer"
+	"github.com/unistack-org/micro/v3/util/id"
 )
 
 // Option func
@@ -119,7 +119,7 @@ func Tracer(t tracer.Tracer) Option {
 // NewOptions returns network default options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Id:      uuid.New().String(),
+		Id:      id.Must(),
 		Name:    "go.micro",
 		Address: ":0",
 		Logger:  logger.DefaultLogger,

network/tunnel/broker/broker.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/unistack-org/micro/v3/broker"
 	"github.com/unistack-org/micro/v3/logger"
+	"github.com/unistack-org/micro/v3/metadata"
 	"github.com/unistack-org/micro/v3/network/transport"
 	"github.com/unistack-org/micro/v3/network/tunnel"
 )
@@ -81,7 +82,7 @@ func (t *tunBroker) BatchPublish(ctx context.Context, msgs []*broker.Message, op
 		topic, _ := msg.Header.Get(metadata.HeaderTopic)
 		c, ok := topicMap[topic]
 		if !ok {
-			c, err := t.tunnel.Dial(ctx, topic, tunnel.DialMode(tunnel.Multicast))
+			c, err = t.tunnel.Dial(ctx, topic, tunnel.DialMode(tunnel.Multicast))
 			if err != nil {
 				return err
 			}

network/tunnel/options.go

@@ -3,11 +3,11 @@ package tunnel
 import (
 	"time"
 
-	"github.com/google/uuid"
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/meter"
 	"github.com/unistack-org/micro/v3/network/transport"
 	"github.com/unistack-org/micro/v3/tracer"
+	"github.com/unistack-org/micro/v3/util/id"
 )
 
 var (
@@ -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:      uuid.New().String(),
+		ID:      id.Must(),
 		Address: DefaultAddress,
 		Token:   DefaultToken,
 		Logger:  logger.DefaultLogger,

profiler/pprof/pprof.go

@@ -31,7 +31,7 @@ func (p *profiler) writeHeap(f *os.File) {
 		select {
 		case <-t.C:
 			runtime.GC()
-			pprof.WriteHeapProfile(f)
+			_ = pprof.WriteHeapProfile(f)
 		case <-p.exit:
 			return
 		}

register/memory.go

@@ -6,8 +6,8 @@ import (
 	"sync"
 	"time"
 
-	"github.com/google/uuid"
 	"github.com/unistack-org/micro/v3/logger"
+	"github.com/unistack-org/micro/v3/util/id"
 )
 
 var (
@@ -378,13 +378,16 @@ func (m *memory) ListServices(ctx context.Context, opts ...ListOption) ([]*Servi
 }
 
 func (m *memory) Watch(ctx context.Context, opts ...WatchOption) (Watcher, error) {
+	id, err := id.New()
+	if err != nil {
+		return nil, err
+	}
 	wo := NewWatchOptions(opts...)
-
 	// construct the watcher
 	w := &watcher{
 		exit: make(chan bool),
 		res:  make(chan *Result),
-		id:   uuid.New().String(),
+		id:   id,
 		wo:   wo,
 	}
 

router/dns.go

@@ -40,8 +40,9 @@ func (d *dns) Lookup(opts ...QueryOption) ([]Route, error) {
 	// check to see if we have the port provided in the service, e.g. go-micro-srv-foo:8000
 	host, port, err := net.SplitHostPort(options.Service)
 	if err == nil {
+		var ips []string
 		// lookup the service using A records
-		ips, err := net.LookupHost(host)
+		ips, err = net.LookupHost(host)
 		if err != nil {
 			return nil, err
 		}
@@ -53,7 +54,7 @@ func (d *dns) Lookup(opts ...QueryOption) ([]Route, error) {
 		for i, ip := range ips {
 			result[i] = Route{
 				Service: options.Service,
-				Address: fmt.Sprintf("%s:%d", ip, uint16(p)),
+				Address: fmt.Sprintf("%s:%d", ip, p),
 			}
 		}
 		return result, nil

router/options.go

@@ -3,9 +3,9 @@ package router
 import (
 	"context"
 
-	"github.com/google/uuid"
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/register"
+	"github.com/unistack-org/micro/v3/util/id"
 )
 
 // Options are router options
@@ -80,7 +80,7 @@ func Name(n string) Option {
 // NewOptions returns router default options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Id:       uuid.New().String(),
+		Id:       id.Must(),
 		Network:  DefaultNetwork,
 		Register: register.DefaultRegister,
 		Logger:   logger.DefaultLogger,

server/generate.go

@@ -1,3 +1,12 @@
 package server
 
-//go:generate protoc -I./health -I../ -I/home/vtolstov/.cache/go-path/pkg/mod/github.com/unistack-org/micro-proto@v0.0.1 --micro_out=components=micro|http|server,standalone=false,debug=true,paths=source_relative:./health health/health.proto
+//go:generate sh -c "protoc -I./health -I../ -I$(go list -f '{{ .Dir }}' -m github.com/unistack-org/micro-proto) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./health health/health.proto"
+
+import (
+
+	// import required packages
+	_ "github.com/unistack-org/micro-proto/api"
+
+	// import required packages
+	_ "github.com/unistack-org/micro-proto/openapiv2"
+)

server/health/health.proto

@@ -11,51 +11,51 @@ service Health {
 	rpc Live(micro.codec.Frame) returns (micro.codec.Frame) {
 		option (micro.openapiv2.openapiv2_operation) = {
       operation_id: "Live";
-        responses: {
-          key: "default";
+      responses: {
+        response_code: {
+          name: "default";
           value: {
-            description: "Error response";
-            schema: {
-              json_schema: {
-                ref: "micro.codec.Frame";
-              }
-            }
-          }
-        }
+            json_reference: {
+              description: "Error response";
+              _ref: "micro.codec.Frame";
+            };
+          };
+        };
+      };
     };
 		option (micro.api.http) = { get: "/live"; };
   };
 	rpc Ready(micro.codec.Frame) returns (micro.codec.Frame) {
 		option (micro.openapiv2.openapiv2_operation) = {
       operation_id: "Ready";
-        responses: {
-          key: "default";
+      responses: {
+        response_code: {
+          name: "default";
           value: {
-            description: "Error response";
-            schema: {
-              json_schema: {
-                ref: "micro.codec.Frame";
-              }
-            }
-          }
-        }
+            json_reference: {
+              description: "Error response";
+              _ref: "micro.codec.Frame";
+            };
+          };
+        };
+      };
     };
 		option (micro.api.http) = { get: "/ready"; };
   };
 	rpc Version(micro.codec.Frame) returns (micro.codec.Frame) {
 		option (micro.openapiv2.openapiv2_operation) = {
       operation_id: "Version";
-        responses: {
-          key: "default";
+      responses: {
+        response_code: {
+          name: "default";
           value: {
-            description: "Error response";
-            schema: {
-              json_schema: {
-                ref: "micro.codec.Frame";
-              }
-            }
-          }
-        }
+            json_reference: {
+              description: "Error response";
+              _ref: "micro.codec.Frame";
+            };
+          };
+        };
+      };
     };
 		option (micro.api.http) = { get: "/version"; };
   };

server/health/health_micro.pb.go

@@ -1,34 +1,43 @@
-// Code generated by protoc-gen-micro
+// Code generated by protoc-gen-go-micro. DO NOT EDIT.
+// protoc-gen-go-micro version: v3.4.2
 // source: health.proto
+
 package health
 
 import (
 	context "context"
+
 	api "github.com/unistack-org/micro/v3/api"
 	codec "github.com/unistack-org/micro/v3/codec"
 )
 
-func NewHealthEndpoints() []*api.Endpoint {
-	return []*api.Endpoint{
-		&api.Endpoint{
+var (
+	HealthName = "Health"
+
+	HealthEndpoints = []api.Endpoint{
+		{
 			Name:    "Health.Live",
 			Path:    []string{"/live"},
 			Method:  []string{"GET"},
 			Handler: "rpc",
 		},
-		&api.Endpoint{
+		{
 			Name:    "Health.Ready",
 			Path:    []string{"/ready"},
 			Method:  []string{"GET"},
 			Handler: "rpc",
 		},
-		&api.Endpoint{
+		{
 			Name:    "Health.Version",
 			Path:    []string{"/version"},
 			Method:  []string{"GET"},
 			Handler: "rpc",
 		},
 	}
+)
+
+func NewHealthEndpoints() []api.Endpoint {
+	return HealthEndpoints
 }
 
 type HealthServer interface {

server/health/health_micro_http.pb.go

@@ -1,9 +1,12 @@
-// Code generated by protoc-gen-micro
+// Code generated by protoc-gen-go-micro. DO NOT EDIT.
+// protoc-gen-go-micro version: v3.4.2
 // source: health.proto
+
 package health
 
 import (
 	context "context"
+
 	api "github.com/unistack-org/micro/v3/api"
 	codec "github.com/unistack-org/micro/v3/codec"
 	server "github.com/unistack-org/micro/v3/server"
@@ -36,8 +39,8 @@ func RegisterHealthServer(s server.Server, sh HealthServer, opts ...server.Handl
 	}
 	h := &healthServer{sh}
 	var nopts []server.HandlerOption
-	for _, endpoint := range NewHealthEndpoints() {
-		nopts = append(nopts, api.WithEndpoint(endpoint))
+	for _, endpoint := range HealthEndpoints {
+		nopts = append(nopts, api.WithEndpoint(&endpoint))
 	}
 	return s.Handle(s.NewHandler(&Health{h}, append(nopts, opts...)...))
 }

server/noop.go

@@ -6,11 +6,13 @@ import (
 	"sync"
 	"time"
 
-	//	cprotorpc "github.com/unistack-org/micro-codec-protorpc"
 	"github.com/unistack-org/micro/v3/broker"
 	"github.com/unistack-org/micro/v3/codec"
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/register"
+	maddr "github.com/unistack-org/micro/v3/util/addr"
+	mnet "github.com/unistack-org/micro/v3/util/net"
+	"github.com/unistack-org/micro/v3/util/rand"
 )
 
 // DefaultCodecs will be used to encode/decode
@@ -73,8 +75,7 @@ func (n *noopServer) Subscribe(sb Subscriber) error {
 	sub, ok := sb.(*subscriber)
 	if !ok {
 		return fmt.Errorf("invalid subscriber: expected *subscriber")
-	}
-	if len(sub.handlers) == 0 {
+	} else if len(sub.handlers) == 0 {
 		return fmt.Errorf("invalid subscriber: no handler functions")
 	}
 
@@ -107,11 +108,12 @@ func (n *noopServer) Init(opts ...Option) error {
 	}
 
 	if n.handlers == nil {
-		n.handlers = make(map[string]Handler)
+		n.handlers = make(map[string]Handler, 1)
 	}
 	if n.subscribers == nil {
-		n.subscribers = make(map[*subscriber][]broker.Subscriber)
+		n.subscribers = make(map[*subscriber][]broker.Subscriber, 1)
 	}
+
 	if n.exit == nil {
 		n.exit = make(chan chan error)
 	}
@@ -188,7 +190,7 @@ func (n *noopServer) Register() error {
 	}
 
 	// register the service
-	if err := DefaultRegisterFunc(service, config); err != nil {
+	if err = DefaultRegisterFunc(service, config); err != nil {
 		return err
 	}
 
@@ -202,26 +204,34 @@ func (n *noopServer) Register() error {
 
 	cx := config.Context
 
-	for sb := range n.subscribers {
-		handler := n.createSubHandler(sb, config)
-		var opts []broker.SubscribeOption
-		if queue := sb.Options().Queue; len(queue) > 0 {
-			opts = append(opts, broker.SubscribeGroup(queue))
-		}
+	var sub broker.Subscriber
 
+	for sb := range n.subscribers {
 		if sb.Options().Context != nil {
 			cx = sb.Options().Context
 		}
 
-		opts = append(opts, broker.SubscribeContext(cx), broker.SubscribeAutoAck(sb.Options().AutoAck))
+		opts := []broker.SubscribeOption{broker.SubscribeContext(cx), broker.SubscribeAutoAck(sb.Options().AutoAck)}
+		if queue := sb.Options().Queue; len(queue) > 0 {
+			opts = append(opts, broker.SubscribeGroup(queue))
+		}
+
+		if sb.Options().Batch {
+			// batch processing handler
+			sub, err = config.Broker.BatchSubscribe(cx, sb.Topic(), n.newBatchSubHandler(sb, config), opts...)
+		} else {
+			// single processing handler
+			sub, err = config.Broker.Subscribe(cx, sb.Topic(), n.newSubHandler(sb, config), opts...)
+		}
+
+		if err != nil {
+			return err
+		}
 
 		if config.Logger.V(logger.InfoLevel) {
 			config.Logger.Infof(n.opts.Context, "subscribing to topic: %s", sb.Topic())
 		}
-		sub, err := config.Broker.Subscribe(cx, sb.Topic(), handler, opts...)
-		if err != nil {
-			return err
-		}
+
 		n.subscribers[sb] = []broker.Subscriber{sub}
 	}
 
@@ -303,9 +313,22 @@ func (n *noopServer) Start() error {
 	config := n.Options()
 	n.RUnlock()
 
+	// use 127.0.0.1 to avoid scan of all network interfaces
+	addr, err := maddr.Extract("127.0.0.1")
+	if err != nil {
+		return err
+	}
+	var rng rand.Rand
+	i := rng.Intn(20000)
+	// set addr with port
+	addr = mnet.HostPort(addr, 10000+i)
+
+	config.Address = addr
+
 	if config.Logger.V(logger.InfoLevel) {
 		config.Logger.Infof(n.opts.Context, "server [noop] Listening on %s", config.Address)
 	}
+
 	n.Lock()
 	if len(config.Advertise) == 0 {
 		config.Advertise = config.Address

server/noop_test.go

@@ -0,0 +1,102 @@
+package server_test
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"github.com/unistack-org/micro/v3/broker"
+	"github.com/unistack-org/micro/v3/client"
+	"github.com/unistack-org/micro/v3/codec"
+	"github.com/unistack-org/micro/v3/metadata"
+	"github.com/unistack-org/micro/v3/server"
+)
+
+type TestHandler struct {
+	t *testing.T
+}
+
+type TestMessage struct {
+	Name string
+}
+
+func (h *TestHandler) SingleSubHandler(ctx context.Context, msg *codec.Frame) error {
+	// fmt.Printf("msg %s\n", msg.Data)
+	return nil
+}
+
+func (h *TestHandler) BatchSubHandler(ctxs []context.Context, msgs []*codec.Frame) error {
+	if len(msgs) != 8 {
+		h.t.Fatal("invalid number of messages received")
+	}
+	for idx := 0; idx < len(msgs); idx++ {
+		md, _ := metadata.FromIncomingContext(ctxs[idx])
+		_ = md
+		//	fmt.Printf("msg md %v\n", md)
+	}
+	return nil
+}
+
+func TestNoopSub(t *testing.T) {
+	ctx := context.Background()
+
+	b := broker.NewBroker()
+
+	if err := b.Init(); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := b.Connect(ctx); err != nil {
+		t.Fatal(err)
+	}
+
+	s := server.NewServer(
+		server.Broker(b),
+		server.Codec("application/octet-stream", codec.NewCodec()),
+	)
+	if err := s.Init(); err != nil {
+		t.Fatal(err)
+	}
+
+	c := client.NewClient(
+		client.Broker(b),
+		client.Codec("application/octet-stream", codec.NewCodec()),
+		client.ContentType("application/octet-stream"),
+	)
+	if err := c.Init(); err != nil {
+		t.Fatal(err)
+	}
+	h := &TestHandler{t: t}
+
+	if err := s.Subscribe(s.NewSubscriber("single_topic", h.SingleSubHandler,
+		server.SubscriberQueue("queue"),
+	)); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := s.Subscribe(s.NewSubscriber("batch_topic", h.BatchSubHandler,
+		server.SubscriberQueue("queue"),
+		server.SubscriberBatch(true),
+	)); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := s.Start(); err != nil {
+		t.Fatal(err)
+	}
+
+	msgs := make([]client.Message, 0, 8)
+	for i := 0; i < 8; i++ {
+		msgs = append(msgs, c.NewMessage("batch_topic", &codec.Frame{Data: []byte(fmt.Sprintf(`{"name": "test_name %d"}`, i))}))
+	}
+
+	if err := c.BatchPublish(ctx, msgs); err != nil {
+		t.Fatal(err)
+	}
+
+	defer func() {
+		if err := s.Stop(); err != nil {
+			t.Fatal(err)
+		}
+	}()
+}

server/options.go

@@ -71,6 +71,8 @@ type Options struct {
 	Version string
 	// SubWrappers holds the server subscribe wrappers
 	SubWrappers []SubscriberWrapper
+	// BatchSubWrappers holds the server batch subscribe wrappers
+	BatchSubWrappers []BatchSubscriberWrapper
 	// HdlrWrappers holds the handler wrappers
 	HdlrWrappers []HandlerWrapper
 	// RegisterAttempts holds the number of register attempts before error
@@ -302,6 +304,13 @@ func WrapSubscriber(w SubscriberWrapper) Option {
 	}
 }
 
+// WrapBatchSubscriber adds a batch subscriber Wrapper to a list of options passed into the server
+func WrapBatchSubscriber(w BatchSubscriberWrapper) Option {
+	return func(o *Options) {
+		o.BatchSubWrappers = append(o.BatchSubWrappers, w)
+	}
+}
+
 // MaxConn specifies maximum number of max simultaneous connections to server
 func MaxConn(n int) Option {
 	return func(o *Options) {
@@ -354,6 +363,12 @@ type SubscriberOptions struct {
 	AutoAck bool
 	// BodyOnly flag specifies that message without headers
 	BodyOnly bool
+	// Batch flag specifies that message processed in batches
+	Batch bool
+	// BatchSize flag specifies max size of batch
+	BatchSize int
+	// BatchWait flag specifies max wait time for batch filling
+	BatchWait time.Duration
 }
 
 // NewSubscriberOptions create new SubscriberOptions
@@ -413,3 +428,32 @@ func SubscriberContext(ctx context.Context) SubscriberOption {
 		o.Context = ctx
 	}
 }
+
+// SubscriberAck control auto ack processing for handler
+func SubscriberAck(b bool) SubscriberOption {
+	return func(o *SubscriberOptions) {
+		o.AutoAck = b
+	}
+}
+
+// SubscriberBatch control batch processing for handler
+func SubscriberBatch(b bool) SubscriberOption {
+	return func(o *SubscriberOptions) {
+		o.Batch = b
+	}
+}
+
+// SubscriberBatchSize control batch filling size for handler
+// Batch filling max waiting time controlled by SubscriberBatchWait
+func SubscriberBatchSize(n int) SubscriberOption {
+	return func(o *SubscriberOptions) {
+		o.BatchSize = n
+	}
+}
+
+// SubscriberBatchWait control batch filling wait time for handler
+func SubscriberBatchWait(td time.Duration) SubscriberOption {
+	return func(o *SubscriberOptions) {
+		o.BatchWait = td
+	}
+}

server/server.go

@@ -5,10 +5,10 @@ import (
 	"context"
 	"time"
 
-	"github.com/google/uuid"
 	"github.com/unistack-org/micro/v3/codec"
 	"github.com/unistack-org/micro/v3/metadata"
 	"github.com/unistack-org/micro/v3/register"
+	"github.com/unistack-org/micro/v3/util/id"
 )
 
 // DefaultServer default server
@@ -22,7 +22,7 @@ var (
 	// DefaultVersion will be used if no version passed
 	DefaultVersion = "latest"
 	// DefaultID will be used if no id passed
-	DefaultID = uuid.New().String()
+	DefaultID = id.Must()
 	// DefaultRegisterCheck holds func that run before register server
 	DefaultRegisterCheck = func(context.Context) error { return nil }
 	// DefaultRegisterInterval holds interval for register

server/subscriber.go

@@ -11,6 +11,7 @@ import (
 	"unicode/utf8"
 
 	"github.com/unistack-org/micro/v3/broker"
+	"github.com/unistack-org/micro/v3/codec"
 	"github.com/unistack-org/micro/v3/errors"
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/metadata"
@@ -18,7 +19,8 @@ import (
 )
 
 const (
-	subSig = "func(context.Context, interface{}) error"
+	subSig      = "func(context.Context, interface{}) error"
+	batchSubSig = "func([]context.Context, []interface{}) error"
 )
 
 // Precompute the reflect type for error. Can't use error directly
@@ -57,26 +59,33 @@ func isExportedOrBuiltinType(t reflect.Type) bool {
 	return isExported(t.Name()) || t.PkgPath() == ""
 }
 
-// ValidateSubscriber func
+// ValidateSubscriber func signature
 func ValidateSubscriber(sub Subscriber) error {
 	typ := reflect.TypeOf(sub.Subscriber())
 	var argType reflect.Type
-
 	switch typ.Kind() {
 	case reflect.Func:
 		name := "Func"
 		switch typ.NumIn() {
 		case 2:
 			argType = typ.In(1)
+			if sub.Options().Batch {
+				if argType.Kind() != reflect.Slice {
+					return fmt.Errorf("subscriber %v dont have required signature %s", name, batchSubSig)
+				}
+				if strings.Compare(fmt.Sprintf("%v", argType), "[]interface{}") == 0 {
+					return fmt.Errorf("subscriber %v dont have required signaure %s", name, batchSubSig)
+				}
+			}
 		default:
-			return fmt.Errorf("subscriber %v takes wrong number of args: %v required signature %s", name, typ.NumIn(), subSig)
+			return fmt.Errorf("subscriber %v takes wrong number of args: %v required signature %s or %s", name, typ.NumIn(), subSig, batchSubSig)
 		}
 		if !isExportedOrBuiltinType(argType) {
 			return fmt.Errorf("subscriber %v argument type not exported: %v", name, argType)
 		}
 		if typ.NumOut() != 1 {
-			return fmt.Errorf("subscriber %v has wrong number of outs: %v require signature %s",
-				name, typ.NumOut(), subSig)
+			return fmt.Errorf("subscriber %v has wrong number of return values: %v require signature %s or %s",
+				name, typ.NumOut(), subSig, batchSubSig)
 		}
 		if returnType := typ.Out(0); returnType != typeOfError {
 			return fmt.Errorf("subscriber %v returns %v not error", name, returnType.String())
@@ -87,13 +96,12 @@ func ValidateSubscriber(sub Subscriber) error {
 
 		for m := 0; m < typ.NumMethod(); m++ {
 			method := typ.Method(m)
-
 			switch method.Type.NumIn() {
 			case 3:
 				argType = method.Type.In(2)
 			default:
-				return fmt.Errorf("subscriber %v.%v takes wrong number of args: %v required signature %s",
-					name, method.Name, method.Type.NumIn(), subSig)
+				return fmt.Errorf("subscriber %v.%v takes wrong number of args: %v required signature %s or %s",
+					name, method.Name, method.Type.NumIn(), subSig, batchSubSig)
 			}
 
 			if !isExportedOrBuiltinType(argType) {
@@ -101,8 +109,8 @@ func ValidateSubscriber(sub Subscriber) error {
 			}
 			if method.Type.NumOut() != 1 {
 				return fmt.Errorf(
-					"subscriber %v.%v has wrong number of outs: %v require signature %s",
-					name, method.Name, method.Type.NumOut(), subSig)
+					"subscriber %v.%v has wrong number of return values: %v require signature %s or %s",
+					name, method.Name, method.Type.NumOut(), subSig, batchSubSig)
 			}
 			if returnType := method.Type.Out(0); returnType != typeOfError {
 				return fmt.Errorf("subscriber %v.%v returns %v not error", name, method.Name, returnType.String())
@@ -183,7 +191,125 @@ func newSubscriber(topic string, sub interface{}, opts ...SubscriberOption) Subs
 }
 
 //nolint:gocyclo
-func (n *noopServer) createSubHandler(sb *subscriber, opts Options) broker.Handler {
+func (n *noopServer) newBatchSubHandler(sb *subscriber, opts Options) broker.BatchHandler {
+	return func(ps broker.Events) (err error) {
+		defer func() {
+			if r := recover(); r != nil {
+				n.RLock()
+				config := n.opts
+				n.RUnlock()
+				if config.Logger.V(logger.ErrorLevel) {
+					config.Logger.Error(n.opts.Context, "panic recovered: ", r)
+					config.Logger.Error(n.opts.Context, string(debug.Stack()))
+				}
+				err = errors.InternalServerError(n.opts.Name+".subscriber", "panic recovered: %v", r)
+			}
+		}()
+
+		msgs := make([]Message, 0, len(ps))
+		ctxs := make([]context.Context, 0, len(ps))
+		for _, p := range ps {
+			msg := p.Message()
+			// if we don't have headers, create empty map
+			if msg.Header == nil {
+				msg.Header = metadata.New(2)
+			}
+
+			ct, _ := msg.Header.Get(metadata.HeaderContentType)
+			if len(ct) == 0 {
+				msg.Header.Set(metadata.HeaderContentType, defaultContentType)
+				ct = defaultContentType
+			}
+			hdr := metadata.Copy(msg.Header)
+			topic, _ := msg.Header.Get(metadata.HeaderTopic)
+			ctxs = append(ctxs, metadata.NewIncomingContext(sb.opts.Context, hdr))
+			msgs = append(msgs, &rpcMessage{
+				topic:       topic,
+				contentType: ct,
+				header:      msg.Header,
+				body:        msg.Body,
+			})
+		}
+		results := make(chan error, len(sb.handlers))
+
+		for i := 0; i < len(sb.handlers); i++ {
+			handler := sb.handlers[i]
+
+			var req reflect.Value
+
+			switch handler.reqType.Kind() {
+			case reflect.Ptr:
+				req = reflect.New(handler.reqType.Elem())
+			default:
+				req = reflect.New(handler.reqType.Elem()).Elem()
+			}
+
+			reqType := handler.reqType
+			var cf codec.Codec
+			for _, msg := range msgs {
+				cf, err = n.newCodec(msg.ContentType())
+				if err != nil {
+					return err
+				}
+				rb := reflect.New(req.Type().Elem())
+				if err = cf.ReadBody(bytes.NewReader(msg.Body()), rb.Interface()); err != nil {
+					return err
+				}
+				msg.(*rpcMessage).codec = cf
+				msg.(*rpcMessage).payload = rb.Interface()
+			}
+
+			fn := func(ctxs []context.Context, ms []Message) error {
+				var vals []reflect.Value
+				if sb.typ.Kind() != reflect.Func {
+					vals = append(vals, sb.rcvr)
+				}
+				if handler.ctxType != nil {
+					vals = append(vals, reflect.ValueOf(ctxs))
+				}
+				payloads := reflect.MakeSlice(reqType, 0, len(ms))
+				for _, m := range ms {
+					payloads = reflect.Append(payloads, reflect.ValueOf(m.Payload()))
+				}
+				vals = append(vals, payloads)
+
+				returnValues := handler.method.Call(vals)
+				if rerr := returnValues[0].Interface(); rerr != nil {
+					return rerr.(error)
+				}
+				return nil
+			}
+
+			for i := len(opts.BatchSubWrappers); i > 0; i-- {
+				fn = opts.BatchSubWrappers[i-1](fn)
+			}
+
+			if n.wg != nil {
+				n.wg.Add(1)
+			}
+			go func() {
+				if n.wg != nil {
+					defer n.wg.Done()
+				}
+				results <- fn(ctxs, msgs)
+			}()
+		}
+
+		var errors []string
+		for i := 0; i < len(sb.handlers); i++ {
+			if rerr := <-results; rerr != nil {
+				errors = append(errors, rerr.Error())
+			}
+		}
+		if len(errors) > 0 {
+			err = fmt.Errorf("subscriber error: %s", strings.Join(errors, "\n"))
+		}
+		return err
+	}
+}
+
+//nolint:gocyclo
+func (n *noopServer) newSubHandler(sb *subscriber, opts Options) broker.Handler {
 	return func(p broker.Event) (err error) {
 		defer func() {
 			if r := recover(); r != nil {
@@ -201,12 +327,12 @@ func (n *noopServer) createSubHandler(sb *subscriber, opts Options) broker.Handl
 		msg := p.Message()
 		// if we don't have headers, create empty map
 		if msg.Header == nil {
-			msg.Header = make(map[string]string)
+			msg.Header = metadata.New(2)
 		}
 
 		ct := msg.Header["Content-Type"]
 		if len(ct) == 0 {
-			msg.Header["Content-Type"] = defaultContentType
+			msg.Header.Set(metadata.HeaderContentType, defaultContentType)
 			ct = defaultContentType
 		}
 		cf, err := n.newCodec(ct)
@@ -214,12 +340,12 @@ func (n *noopServer) createSubHandler(sb *subscriber, opts Options) broker.Handl
 			return err
 		}
 
-		hdr := make(map[string]string, len(msg.Header))
+		hdr := metadata.New(len(msg.Header))
 		for k, v := range msg.Header {
 			if k == "Content-Type" {
 				continue
 			}
-			hdr[k] = v
+			hdr.Set(k, v)
 		}
 
 		ctx := metadata.NewIncomingContext(sb.opts.Context, hdr)
@@ -294,7 +420,6 @@ func (n *noopServer) createSubHandler(sb *subscriber, opts Options) broker.Handl
 		if len(errors) > 0 {
 			err = fmt.Errorf("subscriber error: %s", strings.Join(errors, "\n"))
 		}
-
 		return err
 	}
 }

server/wrapper.go

@@ -14,12 +14,20 @@ type HandlerFunc func(ctx context.Context, req Request, rsp interface{}) error
 // publication message.
 type SubscriberFunc func(ctx context.Context, msg Message) error
 
+// BatchSubscriberFunc represents a single method of a subscriber. It's used primarily
+// for the wrappers. What's handed to the actual method is the concrete
+// publication message. This func used by batch subscribers
+type BatchSubscriberFunc func(ctxs []context.Context, msgs []Message) error
+
 // HandlerWrapper wraps the HandlerFunc and returns the equivalent
 type HandlerWrapper func(HandlerFunc) HandlerFunc
 
 // SubscriberWrapper wraps the SubscriberFunc and returns the equivalent
 type SubscriberWrapper func(SubscriberFunc) SubscriberFunc
 
+// BatchSubscriberWrapper wraps the SubscriberFunc and returns the equivalent
+type BatchSubscriberWrapper func(BatchSubscriberFunc) BatchSubscriberFunc
+
 // StreamWrapper wraps a Stream interface and returns the equivalent.
 // Because streams exist for the lifetime of a method invocation this
 // is a convenient way to wrap a Stream as its in use for trace, monitoring,

store/options.go

@@ -32,8 +32,8 @@ type Options struct {
 	Namespace string
 	// Addrs contains store address
 	Addrs []string
-	//Wrappers store wrapper that called before actual functions
-	//Wrappers []Wrapper
+	// Wrappers store wrapper that called before actual functions
+	// Wrappers []Wrapper
 }
 
 // NewOptions creates options struct

store/wrapper.go

@@ -5,21 +5,19 @@ import (
 )
 
 // LogfFunc function used for Logf method
-//type LogfFunc func(ctx context.Context, level Level, msg string, args ...interface{})
-
-//type Wrapper interface {
-// Logf logs message with needed level
-//Logf(LogfFunc) LogfFunc
-//}
+// type LogfFunc func(ctx context.Context, level Level, msg string, args ...interface{})
+// type Wrapper interface {
+//   Logf logs message with needed level
+//   Logf(LogfFunc) LogfFunc
+// }
 
+// NamespaceStore wrap store with namespace
 type NamespaceStore struct {
 	s  Store
 	ns string
 }
 
-var (
-	_ Store = &NamespaceStore{}
-)
+var _ Store = &NamespaceStore{}
 
 func NewNamespaceStore(s Store, ns string) Store {
 	return &NamespaceStore{s: s, ns: ns}
@@ -69,7 +67,7 @@ func (w *NamespaceStore) String() string {
 	return w.s.String()
 }
 
-//type NamespaceWrapper struct{}
+// type NamespaceWrapper struct{}
 
 //func NewNamespaceWrapper() Wrapper {
 //	return &NamespaceWrapper{}

util/auth/auth.go

@@ -4,9 +4,9 @@ import (
 	"context"
 	"time"
 
-	"github.com/google/uuid"
 	"github.com/unistack-org/micro/v3/auth"
 	"github.com/unistack-org/micro/v3/logger"
+	"github.com/unistack-org/micro/v3/util/id"
 )
 
 // Verify the auth credentials and refresh the auth token periodically
@@ -22,7 +22,11 @@ func Verify(a auth.Auth) error {
 			auth.WithScopes("service"),
 		}
 
-		acc, err := a.Generate(uuid.New().String(), opts...)
+		id, err := id.New()
+		if err != nil {
+			return err
+		}
+		acc, err := a.Generate(id, opts...)
 		if err != nil {
 			return err
 		}

util/http/http_test.go

@@ -3,6 +3,7 @@
 package http
 
 import (
+	"io"
 	"net"
 	"net/http"
 	"testing"
@@ -80,5 +81,4 @@ func TestRoundTripper(t *testing.T) {
 	if string(b) != "hello world" {
 		t.Fatal("response is", string(b))
 	}
-
 }

util/http/trie.go

@@ -0,0 +1,201 @@
+package http
+
+import (
+	"regexp"
+	"strings"
+	"sync"
+)
+
+// Tree is a trie tree.
+type Trie struct {
+	node   *node
+	rcache map[string]*regexp.Regexp
+	rmu    sync.RWMutex
+}
+
+// node is a node of tree
+type node struct {
+	actions  map[string]interface{} // key is method, val is handler interface
+	children map[string]*node       // key is label of next nodes
+	label    string
+}
+
+const (
+	pathRoot          string = "/"
+	pathDelimiter     string = "/"
+	paramDelimiter    string = ":"
+	leftPtnDelimiter  string = "{"
+	rightPtnDelimiter string = "}"
+	ptnWildcard       string = "(.+)"
+)
+
+// NewTree creates a new trie tree.
+func NewTrie() *Trie {
+	return &Trie{
+		node: &node{
+			label:    pathRoot,
+			actions:  make(map[string]interface{}),
+			children: make(map[string]*node),
+		},
+		rcache: make(map[string]*regexp.Regexp),
+	}
+}
+
+// Insert inserts a route definition to tree.
+func (t *Trie) Insert(methods []string, path string, handler interface{}) {
+	curNode := t.node
+	if path == pathRoot {
+		curNode.label = path
+		for _, method := range methods {
+			curNode.actions[method] = handler
+		}
+		return
+	}
+	ep := splitPath(path)
+	for i, p := range ep {
+		nextNode, ok := curNode.children[p]
+		if ok {
+			curNode = nextNode
+		}
+		// Create a new node.
+		if !ok {
+			curNode.children[p] = &node{
+				label:    p,
+				actions:  make(map[string]interface{}),
+				children: make(map[string]*node),
+			}
+			curNode = curNode.children[p]
+		}
+		// last loop.
+		// If there is already registered data, overwrite it.
+		if i == len(ep)-1 {
+			curNode.label = p
+			for _, method := range methods {
+				curNode.actions[method] = handler
+			}
+			break
+		}
+	}
+}
+
+// Search searches a path from a tree.
+func (t *Trie) Search(method string, path string) (interface{}, map[string]string, bool) {
+	params := make(map[string]string)
+
+	curNode := t.node
+	for _, p := range splitPath(path) {
+		nextNode, ok := curNode.children[p]
+		if ok {
+			curNode = nextNode
+			continue
+		}
+		if len(curNode.children) == 0 {
+			if curNode.label != p {
+				// no matching path was found.
+				return nil, nil, false
+			}
+			break
+		}
+		isParamMatch := false
+		for c := range curNode.children {
+			if string([]rune(c)[0]) == leftPtnDelimiter {
+				ptn := getPattern(c)
+				t.rmu.RLock()
+				reg, ok := t.rcache[ptn]
+				t.rmu.RUnlock()
+				if !ok {
+					var err error
+					reg, err = regexp.Compile(ptn)
+					if err != nil {
+						return nil, nil, false
+					}
+					t.rmu.Lock()
+					t.rcache[ptn] = reg
+					t.rmu.Unlock()
+				}
+				if reg.Match([]byte(p)) {
+					pn := getParamName(c)
+					params[pn] = p
+					curNode = curNode.children[c]
+					isParamMatch = true
+					break
+				}
+				// no matching param was found.
+				return nil, nil, false
+			}
+		}
+		if !isParamMatch {
+			return nil, nil, false
+		}
+	}
+	if path == pathRoot {
+		if len(curNode.actions) == 0 {
+			return nil, nil, false
+		}
+	}
+
+	handler, ok := curNode.actions[method]
+	if !ok || handler == nil {
+		return nil, nil, false
+	}
+	return handler, params, true
+}
+
+// getPattern gets a pattern from a label
+// {id:[^\d+$]} -> ^\d+$
+// {id}         -> (.+)
+func getPattern(label string) string {
+	leftI := strings.Index(label, leftPtnDelimiter)
+	rightI := strings.Index(label, paramDelimiter)
+	// if label doesn't have any pattern, return wild card pattern as default.
+	if leftI == -1 || rightI == -1 {
+		return ptnWildcard
+	}
+	return label[rightI+1 : len(label)-1]
+}
+
+// getParamName gets a parameter from a label
+// {id:[^\d+$]} -> id
+// {id}         -> id
+func getParamName(label string) string {
+	leftI := strings.Index(label, leftPtnDelimiter)
+	rightI := func(l string) int {
+		r := []rune(l)
+
+		var n int
+
+	loop:
+		for i := 0; i < len(r); i++ {
+			n = i
+			switch string(r[i]) {
+			case paramDelimiter:
+				n = i
+				break loop
+			case rightPtnDelimiter:
+				n = i
+				break loop
+			}
+
+			if i == len(r)-1 {
+				n = i + 1
+				break loop
+			}
+		}
+
+		return n
+	}(label)
+
+	return label[leftI+1 : rightI]
+}
+
+// splitPath removes an empty value in slice.
+func splitPath(path string) []string {
+	s := strings.Split(path, pathDelimiter)
+	var r []string
+	for _, str := range s {
+		if str != "" {
+			r = append(r, str)
+		}
+	}
+	return r
+}

util/http/trie_test.go

@@ -0,0 +1,81 @@
+package http
+
+import (
+	"net/http"
+	"testing"
+)
+
+func TestTrieContentType(t *testing.T) {
+	type handler struct {
+		name string
+	}
+	tr := NewTrie()
+	tr.Insert([]string{"application/json"}, "/v1/create/{id}", &handler{name: "test"})
+
+	h, _, ok := tr.Search("application/json", "/v1/create/12")
+	if !ok {
+		t.Fatalf("must be found error")
+	}
+	if h.(*handler).name != "test" {
+		t.Fatalf("invalid handler %v", h)
+	}
+	_, _, ok = tr.Search("text/xml", "/v1/create/12")
+	if ok {
+		t.Fatalf("must be not found error")
+	}
+}
+
+func TestTrieNoMatchMethod(t *testing.T) {
+	tr := NewTrie()
+	tr.Insert([]string{http.MethodPut}, "/v1/create/{id}", nil)
+
+	_, _, ok := tr.Search(http.MethodPost, "/v1/create")
+	if ok {
+		t.Fatalf("must be not found error")
+	}
+}
+
+func TestTrieMatchRegexp(t *testing.T) {
+	type handler struct{}
+	tr := NewTrie()
+	tr.Insert([]string{http.MethodPut}, "/v1/create/{category}/{id:[0-9]+}", &handler{})
+
+	_, params, ok := tr.Search(http.MethodPut, "/v1/create/test_cat/12345")
+	if !ok {
+		t.Fatalf("route not found")
+	} else if len(params) != 2 {
+		t.Fatalf("param matching error %v", params)
+	} else if params["category"] != "test_cat" {
+		t.Fatalf("param matching error %v", params)
+	}
+}
+
+func TestTrieMatchRegexpFail(t *testing.T) {
+	type handler struct{}
+	tr := NewTrie()
+	tr.Insert([]string{http.MethodPut}, "/v1/create/{id:[a-z]+}", &handler{})
+
+	_, _, ok := tr.Search(http.MethodPut, "/v1/create/12345")
+	if ok {
+		t.Fatalf("route must not be not found")
+	}
+}
+
+func TestTrieMatchLongest(t *testing.T) {
+	type handler struct {
+		name string
+	}
+	tr := NewTrie()
+	tr.Insert([]string{http.MethodPut}, "/v1/create", &handler{name: "first"})
+	tr.Insert([]string{http.MethodPut}, "/v1/create/{id:[0-9]+}", &handler{name: "second"})
+	if h, _, ok := tr.Search(http.MethodPut, "/v1/create/12345"); !ok {
+		t.Fatalf("route must be found")
+	} else if h.(*handler).name != "second" {
+		t.Fatalf("invalid handler found: %s != %s", h.(*handler).name, "second")
+	}
+	if h, _, ok := tr.Search(http.MethodPut, "/v1/create"); !ok {
+		t.Fatalf("route must be found")
+	} else if h.(*handler).name != "first" {
+		t.Fatalf("invalid handler found: %s != %s", h.(*handler).name, "first")
+	}
+}

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

@@ -0,0 +1,112 @@
+package id
+
+import (
+	"context"
+	"crypto/rand"
+	"errors"
+	"math"
+
+	"github.com/unistack-org/micro/v3/logger"
+)
+
+// DefaultAlphabet is the alphabet used for ID characters by default
+var DefaultAlphabet = []rune("6789BCDFGHJKLMNPQRTWbcdfghjkmnpqrtwz")
+
+// DefaultSize is the size used for ID by default
+// To get uuid like collision specify 21
+var DefaultSize = 16
+
+// getMask generates bit mask used to obtain bits from the random bytes that are used to get index of random character
+// 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++ {
+		mask := (2 << uint(i)) - 1
+		if mask >= alphabetSize-1 {
+			return mask
+		}
+	}
+	return 0
+}
+
+// New returns new id or error
+func New(opts ...Option) (string, error) {
+	options := NewOptions(opts...)
+
+	if len(options.Alphabet) == 0 || len(options.Alphabet) > 255 {
+		return "", errors.New("alphabet must not be empty and contain no more than 255 chars")
+	}
+	if options.Size <= 0 {
+		return "", errors.New("size must be positive integer")
+	}
+
+	chars := options.Alphabet
+
+	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 Must(opts ...Option) string {
+	id, err := New(opts...)
+	if err != nil {
+		logger.Fatal(context.TODO(), err)
+	}
+	return id
+}
+
+// Options contains id deneration options
+type Options struct {
+	Alphabet []rune
+	Size     int
+}
+
+// Option func signature
+type Option func(*Options)
+
+// Alphabet specifies alphabet to use
+func Alphabet(alphabet string) Option {
+	return func(o *Options) {
+		o.Alphabet = []rune(alphabet)
+	}
+}
+
+// Size specifies id size
+func Size(size int) Option {
+	return func(o *Options) {
+		o.Size = size
+	}
+}
+
+// NewOptions returns new Options struct filled by opts
+func NewOptions(opts ...Option) Options {
+	options := Options{
+		Alphabet: DefaultAlphabet,
+		Size:     DefaultSize,
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+	return options
+}

util/jitter/random.go

@@ -7,8 +7,8 @@ import (
 	"github.com/unistack-org/micro/v3/util/rand"
 )
 
-// Do returns a random time to jitter with max cap specified
-func Do(d time.Duration) time.Duration {
+// Random returns a random time to jitter with max cap specified
+func Random(d time.Duration) time.Duration {
 	var rng rand.Rand
 	v := rng.Float64() * float64(d.Nanoseconds())
 	return time.Duration(v)

util/jitter/ticker.go

@@ -0,0 +1,65 @@
+package jitter
+
+import (
+	"time"
+
+	"github.com/unistack-org/micro/v3/util/rand"
+)
+
+// Ticker is similar to time.Ticker but ticks at random intervals between
+// the min and max duration values (stored internally as int64 nanosecond
+// counts).
+type Ticker struct {
+	C    chan time.Time
+	done chan chan struct{}
+	min  int64
+	max  int64
+	rng  rand.Rand
+}
+
+// NewTicker returns a pointer to an initialized instance of the Ticker.
+// Min and max are durations of the shortest and longest allowed
+// ticks. Ticker will run in a goroutine until explicitly stopped.
+func NewTicker(min, max time.Duration) *Ticker {
+	ticker := &Ticker{
+		C:    make(chan time.Time),
+		done: make(chan chan struct{}),
+		min:  min.Nanoseconds(),
+		max:  max.Nanoseconds(),
+	}
+	go ticker.run()
+	return ticker
+}
+
+// Stop terminates the ticker goroutine and closes the C channel.
+func (ticker *Ticker) Stop() {
+	c := make(chan struct{})
+	ticker.done <- c
+	<-c
+}
+
+func (ticker *Ticker) run() {
+	defer close(ticker.C)
+	t := time.NewTimer(ticker.nextInterval())
+	for {
+		// either a stop signal or a timeout
+		select {
+		case c := <-ticker.done:
+			t.Stop()
+			close(c)
+			return
+		case <-t.C:
+			select {
+			case ticker.C <- time.Now():
+				t.Stop()
+				t = time.NewTimer(ticker.nextInterval())
+			default:
+				// there could be noone receiving...
+			}
+		}
+	}
+}
+
+func (ticker *Ticker) nextInterval() time.Duration {
+	return time.Duration(ticker.rng.Int63n(ticker.max-ticker.min)+ticker.min) * time.Nanosecond
+}

util/pool/default.go

@@ -5,8 +5,8 @@ import (
 	"sync"
 	"time"
 
-	"github.com/google/uuid"
 	"github.com/unistack-org/micro/v3/network/transport"
+	"github.com/unistack-org/micro/v3/util/id"
 )
 
 type pool struct {
@@ -87,9 +87,13 @@ func (p *pool) Get(ctx context.Context, addr string, opts ...transport.DialOptio
 	if err != nil {
 		return nil, err
 	}
+	id, err := id.New()
+	if err != nil {
+		return nil, err
+	}
 	return &poolConn{
 		Client:  c,
-		id:      uuid.New().String(),
+		id:      id,
 		created: time.Now(),
 	}, nil
 }

util/rand/rand.go

@@ -1,17 +1,17 @@
 package rand
 
 import (
-	"crypto/rand"
+	crand "crypto/rand"
 	"encoding/binary"
 )
 
-// Rand is a wrapper around crypto/rand that adds some convenience functions known from math/rand.
+// Rand is a wrapper around crypto/rand that adds some convenience functions known from math/rand
 type Rand struct {
 	buf [8]byte
 }
 
 func (r *Rand) Int31() int32 {
-	_, _ = rand.Read(r.buf[:4])
+	_, _ = crand.Read(r.buf[:4])
 	return int32(binary.BigEndian.Uint32(r.buf[:4]) & ^uint32(1<<31))
 }
 
@@ -54,11 +54,11 @@ func (r *Rand) Intn(n int) int {
 }
 
 func (r *Rand) Int63() int64 {
-	_, _ = rand.Read(r.buf[:])
+	_, _ = crand.Read(r.buf[:])
 	return int64(binary.BigEndian.Uint64(r.buf[:]) & ^uint64(1<<63))
 }
 
-// copied from the standard library math/rand implementation of Int63n
+// Int31n copied from the standard library math/rand implementation of Int31n
 func (r *Rand) Int31n(n int32) int32 {
 	if n&(n-1) == 0 { // n is power of two, can mask
 		return r.Int31() & (n - 1)
@@ -71,6 +71,7 @@ func (r *Rand) Int31n(n int32) int32 {
 	return v % n
 }
 
+// Int63n copied from the standard library math/rand implementation of Int63n
 func (r *Rand) Int63n(n int64) int64 {
 	if n&(n-1) == 0 { // n is power of two, can mask
 		return r.Int63() & (n - 1)
@@ -82,3 +83,26 @@ func (r *Rand) Int63n(n int64) int64 {
 	}
 	return v % n
 }
+
+// Shuffle copied from the standard library math/rand implementation of Shuffle
+func (r *Rand) Shuffle(n int, swap func(i, j int)) {
+	if n < 0 {
+		panic("invalid argument to Shuffle")
+	}
+
+	// Fisher-Yates shuffle: https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle
+	// Shuffle really ought not be called with n that doesn't fit in 32 bits.
+	// Not only will it take a very long time, but with 2³¹! possible permutations,
+	// there's no way that any PRNG can have a big enough internal state to
+	// generate even a minuscule percentage of the possible permutations.
+	// Nevertheless, the right API signature accepts an int n, so handle it as best we can.
+	i := n - 1
+	for ; i > 1<<31-1-1; i-- {
+		j := int(r.Int63n(int64(i + 1)))
+		swap(i, j)
+	}
+	for ; i > 0; i-- {
+		j := int(r.Int31n(int32(i + 1)))
+		swap(i, j)
+	}
+}

util/reflect/struct.go

@@ -12,10 +12,9 @@ import (
 // ErrInvalidParam specifies invalid url query params
 var ErrInvalidParam = errors.New("invalid url query param provided")
 
+// var timeKind = reflect.ValueOf(time.Time{}).Kind()
 var bracketSplitter = regexp.MustCompile(`\[|\]`)
 
-//var timeKind = reflect.ValueOf(time.Time{}).Kind()
-
 type StructField struct {
 	Field reflect.StructField
 	Value reflect.Value
@@ -149,9 +148,9 @@ func StructFields(src interface{}) ([]StructField, error) {
 		}
 
 		switch val.Kind() {
-		//case timeKind:
-		//fmt.Printf("GGG\n")
-		//fields = append(fields, StructField{Field: fld, Value: val, Path: fld.Name})
+		// case timeKind:
+		// fmt.Printf("GGG\n")
+		// fields = append(fields, StructField{Field: fld, Value: val, Path: fld.Name})
 		case reflect.Struct:
 			infields, err := StructFields(val.Interface())
 			if err != nil {

util/reflect/struct_test.go

@@ -2,7 +2,7 @@ package reflect
 
 import (
 	"net/url"
-	"reflect"
+	rfl "reflect"
 	rfl "reflect"
 	"testing"
 )

util/ring/buffer.go

@@ -5,7 +5,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/google/uuid"
+	"github.com/unistack-org/micro/v3/util/id"
 )
 
 // Buffer is ring buffer
@@ -112,7 +112,7 @@ func (b *Buffer) Stream() (<-chan *Entry, chan bool) {
 	defer b.Unlock()
 
 	entries := make(chan *Entry, 128)
-	id := uuid.New().String()
+	id := id.Must()
 	stop := make(chan bool)
 
 	b.streams[id] = &Stream{

util/router/compile.go

@@ -8,18 +8,18 @@ const (
 
 // Template is a compiled representation of path templates.
 type Template struct {
-	// Verb is a VERB part in the template
-	Verb string
-	// Original template (example: /v1/a_bit_of_everything)
-	Template string
-	// OpCodes is a sequence of operations
+	// Version is the version number of the format.
+	Version int
+	// OpCodes is a sequence of operations.
 	OpCodes []int
 	// Pool is a constant pool
 	Pool []string
-	// Fields is a list of field paths bound in this template
+	// Verb is a VERB part in the template.
+	Verb string
+	// Fields is a list of field paths bound in this template.
 	Fields []string
-	// Version is the version number of the format
-	Version int
+	// Original template (example: /v1/a_bit_of_everything)
+	Template string
 }
 
 // Compiler compiles utilities representation of path templates into marshallable operations.
@@ -29,9 +29,15 @@ type Compiler interface {
 }
 
 type op struct {
-	str     string
-	code    OpCode
-	operand int
+	// code is the opcode of the operation
+	code OpCode
+
+	// str is a string operand of the code.
+	// num is ignored if str is not empty.
+	str string
+
+	// num is a numeric operand of the code.
+	num int
 }
 
 func (w wildcard) compile() []op {
@@ -61,8 +67,8 @@ func (v variable) compile() []op {
 		ops = append(ops, s.compile()...)
 	}
 	ops = append(ops, op{
-		code:    OpConcatN,
-		operand: len(v.segments),
+		code: OpConcatN,
+		num:  len(v.segments),
 	}, op{
 		code: OpCapture,
 		str:  v.path,
@@ -77,7 +83,6 @@ func (t template) Compile() Template {
 		rawOps = append(rawOps, s.compile()...)
 	}
 
-	// ops := make([]int, 0, len(rawOps))
 	var (
 		ops    []int
 		pool   []string
@@ -87,8 +92,12 @@ func (t template) Compile() Template {
 	for _, op := range rawOps {
 		ops = append(ops, int(op.code))
 		if op.str == "" {
-			ops = append(ops, op.operand)
+			ops = append(ops, op.num)
 		} else {
+			// eof segment literal represents the "/" path pattern
+			if op.str == eof {
+				op.str = ""
+			}
 			if _, ok := consts[op.str]; !ok {
 				consts[op.str] = len(pool)
 				pool = append(pool, op.str)

util/router/compile_test.go

@@ -21,6 +21,13 @@ func TestCompile(t *testing.T) {
 		fields []string
 	}{
 		{},
+		{
+			segs: []segment{
+				literal(eof),
+			},
+			ops:  []int{int(OpLitPush), 0},
+			pool: []string{""},
+		},
 		{
 			segs: []segment{
 				wildcard{},

util/router/parse.go

@@ -3,11 +3,8 @@ package router
 // download from https://raw.githubusercontent.com/grpc-ecosystem/grpc-gateway/master/protoc-gen-grpc-gateway/httprule/parse.go
 
 import (
-	"context"
 	"fmt"
 	"strings"
-
-	"github.com/unistack-org/micro/v3/logger"
 )
 
 // InvalidTemplateError indicates that the path template is not valid.
@@ -83,8 +80,30 @@ func tokenize(path string) (tokens []string, verb string) {
 	}
 
 	l := len(tokens)
+	// See
+	// https://github.com/grpc-ecosystem/grpc-gateway/pull/1947#issuecomment-774523693 ;
+	// although normal and backwards-compat logic here is to use the last index
+	// of a colon, if the final segment is a variable followed by a colon, the
+	// part following the colon must be a verb. Hence if the previous token is
+	// an end var marker, we switch the index we're looking for to Index instead
+	// of LastIndex, so that we correctly grab the remaining part of the path as
+	// the verb.
+	var penultimateTokenIsEndVar bool
+	switch l {
+	case 0, 1:
+		// Not enough to be variable so skip this logic and don't result in an
+		// invalid index
+	default:
+		penultimateTokenIsEndVar = tokens[l-2] == "}"
+	}
 	t := tokens[l-1]
-	if idx := strings.LastIndex(t, ":"); idx == 0 {
+	var idx int
+	if penultimateTokenIsEndVar {
+		idx = strings.Index(t, ":")
+	} else {
+		idx = strings.LastIndex(t, ":")
+	}
+	if idx == 0 {
 		tokens, verb = tokens[:l-1], t[1:]
 	} else if idx > 0 {
 		tokens[l-1], verb = t[:idx], t[idx+1:]
@@ -101,22 +120,17 @@ type parser struct {
 
 // topLevelSegments is the target of this parser.
 func (p *parser) topLevelSegments() ([]segment, error) {
-	if logger.V(logger.TraceLevel) {
-		logger.Trace(context.TODO(), "Parsing %q", p.tokens)
+	if _, err := p.accept(typeEOF); err == nil {
+		p.tokens = p.tokens[:0]
+		return []segment{literal(eof)}, nil
 	}
 	segs, err := p.segments()
 	if err != nil {
 		return nil, err
 	}
-	if logger.V(logger.TraceLevel) {
-		logger.Trace(context.TODO(), "accept segments: %q; %q", p.accepted, p.tokens)
-	}
 	if _, err := p.accept(typeEOF); err != nil {
 		return nil, fmt.Errorf("unexpected token %q after segments %q", p.tokens[0], strings.Join(p.accepted, ""))
 	}
-	if logger.V(logger.TraceLevel) {
-		logger.Trace(context.TODO(), "accept eof: %q; %q", p.accepted, p.tokens)
-	}
 	return segs, nil
 }
 
@@ -126,9 +140,6 @@ func (p *parser) segments() ([]segment, error) {
 		return nil, err
 	}
 
-	if logger.V(logger.TraceLevel) {
-		logger.Trace(context.TODO(), "accept segment: %q; %q", p.accepted, p.tokens)
-	}
 	segs := []segment{s}
 	for {
 		if _, err := p.accept("/"); err != nil {
@@ -139,9 +150,6 @@ func (p *parser) segments() ([]segment, error) {
 			return segs, err
 		}
 		segs = append(segs, s)
-		if logger.V(logger.TraceLevel) {
-			logger.Trace(context.TODO(), "accept segment: %q; %q", p.accepted, p.tokens)
-		}
 	}
 }
 

util/router/parse_test.go

@@ -4,7 +4,6 @@ package router
 
 import (
 	"context"
-	"flag"
 	"fmt"
 	"reflect"
 	"testing"
@@ -16,6 +15,7 @@ func TestTokenize(t *testing.T) {
 	for _, spec := range []struct {
 		src    string
 		tokens []string
+		verb   string
 	}{
 		{
 			src:    "",
@@ -84,32 +84,74 @@ func TestTokenize(t *testing.T) {
 				eof,
 			},
 		},
+		{
+			src: "v1/a/{endpoint}:a",
+			tokens: []string{
+				"v1", "/",
+				"a", "/",
+				"{", "endpoint", "}",
+				eof,
+			},
+			verb: "a",
+		},
+		{
+			src: "v1/a/{endpoint}:b:c",
+			tokens: []string{
+				"v1", "/",
+				"a", "/",
+				"{", "endpoint", "}",
+				eof,
+			},
+			verb: "b:c",
+		},
 	} {
 		tokens, verb := tokenize(spec.src)
 		if got, want := tokens, spec.tokens; !reflect.DeepEqual(got, want) {
 			t.Errorf("tokenize(%q) = %q, _; want %q, _", spec.src, got, want)
 		}
-		if got, want := verb, ""; got != want {
-			t.Errorf("tokenize(%q) = _, %q; want _, %q", spec.src, got, want)
-		}
 
-		src := fmt.Sprintf("%s:%s", spec.src, "LOCK")
-		tokens, verb = tokenize(src)
-		if got, want := tokens, spec.tokens; !reflect.DeepEqual(got, want) {
-			t.Errorf("tokenize(%q) = %q, _; want %q, _", src, got, want)
-		}
-		if got, want := verb, "LOCK"; got != want {
-			t.Errorf("tokenize(%q) = _, %q; want _, %q", src, got, want)
+		switch {
+		case spec.verb != "":
+			if got, want := verb, spec.verb; !reflect.DeepEqual(got, want) {
+				t.Errorf("tokenize(%q) = %q, _; want %q, _", spec.src, got, want)
+			}
+
+		default:
+			if got, want := verb, ""; got != want {
+				t.Errorf("tokenize(%q) = _, %q; want _, %q", spec.src, got, want)
+			}
+
+			src := fmt.Sprintf("%s:%s", spec.src, "LOCK")
+			tokens, verb = tokenize(src)
+			if got, want := tokens, spec.tokens; !reflect.DeepEqual(got, want) {
+				t.Errorf("tokenize(%q) = %q, _; want %q, _", src, got, want)
+			}
+			if got, want := verb, "LOCK"; got != want {
+				t.Errorf("tokenize(%q) = _, %q; want _, %q", src, got, want)
+			}
 		}
 	}
 }
 
 func TestParseSegments(t *testing.T) {
-	flag.Set("v", "3")
 	for _, spec := range []struct {
 		tokens []string
 		want   []segment
 	}{
+		{
+			tokens: []string{eof},
+			want: []segment{
+				literal(eof),
+			},
+		},
+		{
+			// Note: this case will never arise as tokenize() will never return such a sequence of tokens
+			// and even if it does it will be treated as [eof]
+			tokens: []string{eof, "v1", eof},
+			want: []segment{
+				literal(eof),
+			},
+		},
 		{
 			tokens: []string{"v1", eof},
 			want: []segment{
@@ -251,7 +293,6 @@ func TestParseSegments(t *testing.T) {
 }
 
 func TestParseSegmentsWithErrors(t *testing.T) {
-	flag.Set("v", "3")
 	for _, spec := range []struct {
 		tokens []string
 	}{
@@ -275,10 +316,6 @@ func TestParseSegmentsWithErrors(t *testing.T) {
 			// invalid percent-encoding
 			tokens: []string{"a%2z", eof},
 		},
-		{
-			// empty segments
-			tokens: []string{eof},
-		},
 		{
 			// unterminated variable
 			tokens: []string{"{", "name", eof},

util/router/runtime.go

@@ -23,9 +23,9 @@ type rop struct {
 	operand int
 }
 
-// Pattern is a template pattern of http request paths defined in github.com/googleapis/googleapis/google/api/http.proto.
+// Pattern is a template pattern of http request paths defined in
+// https://github.com/googleapis/googleapis/blob/master/google/api/http.proto
 type Pattern struct {
-	verb string
 	// ops is a list of operations
 	ops []rop
 	// pool is a constant pool indexed by the operands or vars
@@ -36,32 +36,16 @@ type Pattern struct {
 	stacksize int
 	// tailLen is the length of the fixed-size segments after a deep wildcard
 	tailLen int
-	// assumeColonVerb indicates whether a path suffix after a final
-	// colon may only be interpreted as a verb.
-	assumeColonVerb bool
+	// verb is the VERB part of the path pattern. It is empty if the pattern does not have VERB part.
+	verb string
 }
 
-type patternOptions struct {
-	assumeColonVerb bool
-}
-
-// PatternOpt is an option for creating Patterns.
-type PatternOpt func(*patternOptions)
-
 // NewPattern returns a new Pattern from the given definition values.
 // "ops" is a sequence of op codes. "pool" is a constant pool.
 // "verb" is the verb part of the pattern. It is empty if the pattern does not have the part.
 // "version" must be 1 for now.
 // It returns an error if the given definition is invalid.
-//nolint:gocyclo
-func NewPattern(version int, ops []int, pool []string, verb string, opts ...PatternOpt) (Pattern, error) {
-	options := patternOptions{
-		assumeColonVerb: true,
-	}
-	for _, o := range opts {
-		o(&options)
-	}
-
+func NewPattern(version int, ops []int, pool []string, verb string) (Pattern, error) {
 	if version != 1 {
 		if logger.V(logger.TraceLevel) {
 			logger.Trace(context.TODO(), "unsupported version: %d", version)
@@ -159,13 +143,12 @@ func NewPattern(version int, ops []int, pool []string, verb string, opts ...Patt
 		typedOps = append(typedOps, op)
 	}
 	return Pattern{
-		ops:             typedOps,
-		pool:            pool,
-		vars:            vars,
-		stacksize:       maxstack,
-		tailLen:         tailLen,
-		verb:            verb,
-		assumeColonVerb: options.assumeColonVerb,
+		ops:       typedOps,
+		pool:      pool,
+		vars:      vars,
+		stacksize: maxstack,
+		tailLen:   tailLen,
+		verb:      verb,
 	}, nil
 }
 
@@ -185,7 +168,7 @@ func MustPattern(p Pattern, err error) Pattern {
 //nolint:gocyclo
 func (p Pattern) Match(components []string, verb string) (map[string]string, error) {
 	if p.verb != verb {
-		if p.assumeColonVerb || p.verb != "" {
+		if p.verb != "" {
 			return nil, ErrNotMatch
 		}
 		if len(components) == 0 {
@@ -274,11 +257,3 @@ func (p Pattern) String() string {
 	}
 	return "/" + segs
 }
-
-// AssumeColonVerbOpt indicates whether a path suffix after a final
-// colon may only be interpreted as a verb.
-func AssumeColonVerbOpt(val bool) PatternOpt {
-	return PatternOpt(func(o *patternOptions) {
-		o.assumeColonVerb = val
-	})
-}

util/router/types.go

@@ -8,9 +8,9 @@ import (
 )
 
 type template struct {
+	segments []segment
 	verb     string
 	template string
-	segments []segment
 }
 
 type segment interface {

util/token/basic/basic.go

@@ -6,9 +6,9 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/google/uuid"
 	"github.com/unistack-org/micro/v3/auth"
 	"github.com/unistack-org/micro/v3/store"
+	"github.com/unistack-org/micro/v3/util/id"
 	"github.com/unistack-org/micro/v3/util/token"
 )
 
@@ -44,7 +44,11 @@ func (b *Basic) Generate(acc *auth.Account, opts ...token.GenerateOption) (*toke
 	}
 
 	// write to the store
-	key := uuid.New().String()
+	key, err := id.New()
+	if err != nil {
+		return nil, err
+	}
+
 	err = b.store.Write(context.Background(), fmt.Sprintf("%v%v", StorePrefix, key), bytes, store.WriteTTL(options.Expiry))
 	if err != nil {
 		return nil, err

util/token/jwt/jwt.go

@@ -4,7 +4,7 @@ import (
 	"encoding/base64"
 	"time"
 
-	"github.com/dgrijalva/jwt-go"
+	"github.com/golang-jwt/jwt/v4"
 	"github.com/unistack-org/micro/v3/auth"
 	"github.com/unistack-org/micro/v3/metadata"
 	"github.com/unistack-org/micro/v3/util/token"
@@ -13,7 +13,7 @@ import (
 // authClaims to be encoded in the JWT
 type authClaims struct {
 	Metadata metadata.Metadata `json:"metadata"`
-	jwt.StandardClaims
+	jwt.RegisteredClaims
 	Type   string   `json:"type"`
 	Scopes []string `json:"scopes"`
 }
@@ -50,10 +50,10 @@ func (j *JWT) Generate(acc *auth.Account, opts ...token.GenerateOption) (*token.
 	// generate the JWT
 	expiry := time.Now().Add(options.Expiry)
 	t := jwt.NewWithClaims(jwt.SigningMethodRS256, authClaims{
-		Type: acc.Type, Scopes: acc.Scopes, Metadata: acc.Metadata, StandardClaims: jwt.StandardClaims{
+		Type: acc.Type, Scopes: acc.Scopes, Metadata: acc.Metadata, RegisteredClaims: jwt.RegisteredClaims{
 			Subject:   acc.ID,
 			Issuer:    acc.Issuer,
-			ExpiresAt: expiry.Unix(),
+			ExpiresAt: jwt.NewNumericDate(expiry),
 		},
 	})
 	tok, err := t.SignedString(key)