fixup group lag metric

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
fixup panic
2025-04-23 10:51:39 +03:00 · 2025-03-12 20:34:30 +03:00 · 2025-03-12 16:57:25 +03:00
23 changed files with 417 additions and 988 deletions
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
--- a/.github/ISSUE_TEMPLATE/feature-request---enhancement.md
+++ b/.github/ISSUE_TEMPLATE/feature-request---enhancement.md
--- a/.github/ISSUE_TEMPLATE/question.md
+++ b/.github/ISSUE_TEMPLATE/question.md
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
--- a/.github/workflows/job_lint.yml
+++ b/.github/workflows/job_lint.yml
@@ -3,10 +3,10 @@ name: lint
 on:
  pull_request:
    types: [opened, reopened, synchronize]
-    branches: [ master, v3, v4 ]
-    paths-ignore:
-      - '.github/**'
-      - '.gitea/**'
+    branches:
+    - master
+    - v3
+    - v4

 jobs:
  lint:
@@ -24,6 +24,6 @@ jobs:
    - name: setup deps
      run: go get -v ./...
    - name: run lint
-      uses: golangci/golangci-lint-action@v6
+      uses: https://github.com/golangci/golangci-lint-action@v6
      with:
        version: 'latest'
--- a/.github/workflows/job_test.yml
+++ b/.github/workflows/job_test.yml
@@ -3,12 +3,15 @@ name: test
 on:
  pull_request:
    types: [opened, reopened, synchronize]
-    branches: [ master, v3, v4 ]
+    branches:
+    - master
+    - v3
+    - v4
  push:
-    branches: [ master, v3, v4 ]
-    paths-ignore:
-      - '.github/**'
-      - '.gitea/**'
+    branches:
+    - master
+    - v3
+    - v4

 jobs:
  test:
--- a/.github/workflows/job_tests.yml
+++ b/.github/workflows/job_tests.yml
@@ -3,12 +3,15 @@ name: test
 on:
  pull_request:
    types: [opened, reopened, synchronize]
-    branches: [ master, v3, v4 ]
+    branches:
+    - master
+    - v3
+    - v4
  push:
-    branches: [ master, v3, v4 ]
-    paths-ignore:
-      - '.github/**'
-      - '.gitea/**'
+    branches:
+    - master
+    - v3
+    - v4

 jobs:
  test:
@@ -32,19 +35,19 @@ jobs:
        go-version: 'stable'
    - name: setup go work
      env:
-        GOWORK: ${{ github.workspace }}/go.work
+        GOWORK: /workspace/${{ github.repository_owner }}/go.work
      run: |
        go work init
        go work use .
        go work use micro-tests        
    - name: setup deps
      env:
-        GOWORK: ${{ github.workspace }}/go.work
+        GOWORK: /workspace/${{ github.repository_owner }}/go.work
      run: go get -v ./...
    - name: run tests
      env:
        INTEGRATION_TESTS: yes
-        GOWORK: ${{ github.workspace }}/go.work
+        GOWORK: /workspace/${{ github.repository_owner }}/go.work
      run: |
        cd micro-tests
        go test -mod readonly -v ./... || true        
--- a/.github/workflows/job_coverage.yml
+++ b/.github/workflows/job_coverage.yml
@@ -1,53 +0,0 @@
-name: coverage
-
-on:
-  push:
-    branches: [ main, v3, v4 ]
-    paths-ignore:
-      - '.github/**'
-      - '.gitea/**'
-  pull_request:
-    branches: [ main, v3, v4 ]
-
-jobs:
-
-  build:
-    if: github.server_url != 'https://github.com'
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable'
-
-    - name: test coverage
-      run: |
-        go test -v -cover ./... -covermode=count -coverprofile coverage.out -coverpkg ./...
-        go tool cover -func coverage.out -o coverage.out
-
-    - name: coverage badge
-      uses: tj-actions/coverage-badge-go@v2
-      with:
-        green: 80
-        filename: coverage.out
-
-    - uses: stefanzweifel/git-auto-commit-action@v4
-      name: autocommit
-      with:
-        commit_message: Apply Code Coverage Badge
-        skip_fetch: false
-        skip_checkout: false
-        file_pattern: ./README.md
-
-    - name: push
-      if: steps.auto-commit-action.outputs.changes_detected == 'true'
-      uses: ad-m/github-push-action@master
-      with:
-        github_token: ${{ github.token }}
-        branch: ${{ github.ref }}
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -1,5 +1,21 @@
 run:
  concurrency: 8
-  timeout: 5m
+  deadline: 5m
  issues-exit-code: 1
  tests: true
+
+linters:
+  enable:
+    - staticcheck
+    - unused
+    - gosimple
+    - govet
+    - prealloc
+    - unconvert
+    - nakedret
+
+linters-settings:
+  govet:
+    check-all: true
+    enable:
+      - fieldalignment
--- a/hook_event.go
+++ b/hook_event.go
@@ -7,13 +7,13 @@ import (
 	"time"

 	"github.com/twmb/franz-go/pkg/kgo"
-	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v4/logger"
 )

 type hookEvent struct {
 	log          logger.Logger
-	connected    *atomic.Uint32
 	fatalOnError bool
+	connected    *atomic.Uint32
 }

 var (
@@ -26,48 +26,44 @@ var (
 )

 func (m *hookEvent) OnGroupManageError(err error) {
-	switch {
-	case err == nil || isContextError(err) || kgo.IsRetryableBrokerErr(err):
-		return
-	default:
-		m.log.Error(context.TODO(), "kgo.OnGroupManageError", err)
+	if err != nil {
+		m.connected.Store(0)
+		if m.fatalOnError {
+			m.log.Fatal(context.TODO(), "kgo.OnGroupManageError", err)
+		}
 	}
 }

 func (m *hookEvent) OnBrokerConnect(_ kgo.BrokerMetadata, _ time.Duration, _ net.Conn, err error) {
-	switch {
-	case err == nil || isContextError(err) || kgo.IsRetryableBrokerErr(err):
-		return
-	default:
-		m.log.Error(context.TODO(), "kgo.OnBrokerConnect", err)
+	if err != nil {
+		m.connected.Store(0)
+		if m.fatalOnError {
+			m.log.Fatal(context.TODO(), "kgo.OnBrokerConnect", err)
+		}
 	}
 }

-func (m *hookEvent) OnBrokerDisconnect(_ kgo.BrokerMetadata, _ net.Conn) {}
+func (m *hookEvent) OnBrokerDisconnect(_ kgo.BrokerMetadata, _ net.Conn) {
+	m.connected.Store(0)
+}

 func (m *hookEvent) OnBrokerWrite(_ kgo.BrokerMetadata, _ int16, _ int, _ time.Duration, _ time.Duration, err error) {
-	switch {
-	case err == nil || isContextError(err) || kgo.IsRetryableBrokerErr(err):
-		return
-	default:
-		m.log.Error(context.TODO(), "kgo.OnBrokerWrite", err)
+	if err != nil {
+		m.connected.Store(0)
+		if m.fatalOnError {
+			m.log.Fatal(context.TODO(), "kgo.OnBrokerWrite", err)
+		}
 	}
 }

 func (m *hookEvent) OnBrokerRead(_ kgo.BrokerMetadata, _ int16, _ int, _ time.Duration, _ time.Duration, err error) {
-	switch {
-	case err == nil || isContextError(err) || kgo.IsRetryableBrokerErr(err):
-		return
-	default:
-		m.log.Error(context.TODO(), "kgo.OnBrokerRead", err)
+	if err != nil {
+		m.connected.Store(0)
 	}
 }

 func (m *hookEvent) OnProduceRecordUnbuffered(_ *kgo.Record, err error) {
-	switch {
-	case err == nil || isContextError(err) || kgo.IsRetryableBrokerErr(err):
-		return
-	default:
-		m.log.Error(context.TODO(), "kgo.OnProduceRecordUnbuffered", err)
+	if err != nil {
+		m.connected.Store(0)
 	}
 }
--- a/carrier.go
+++ b/carrier.go
@@ -6,7 +6,7 @@ import (
 	"strings"

 	"github.com/twmb/franz-go/pkg/kgo"
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/metadata"
 )

 // RecordCarrier injects and extracts traces from a kgo.Record.
@@ -77,7 +77,7 @@ loop:
 		for i := 0; i < len(r.Headers); i++ {
 			if strings.EqualFold(r.Headers[i].Key, k) {
 				// Key exist, update the value.
-				r.Headers[i].Value = []byte(v)
+				r.Headers[i].Value = []byte(strings.Join(v, ","))
 				continue loop
 			}
 		}
@@ -85,7 +85,7 @@ loop:
 		// Key does not exist, append new header.
 		r.Headers = append(r.Headers, kgo.RecordHeader{
 			Key:   k,
-			Value: []byte(v),
+			Value: []byte(strings.Join(v, ",")),
 		})

 		seen[k] = struct{}{}
--- a/errors.go
+++ b/errors.go
@@ -1,10 +0,0 @@
-package kgo
-
-import (
-	"context"
-	"errors"
-)
-
-func isContextError(err error) bool {
-	return errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded)
-}
--- a/event.go
+++ b/event.go
@@ -1,50 +0,0 @@
-package kgo
-
-import (
-	"context"
-	"sync"
-
-	"go.unistack.org/micro/v3/broker"
-)
-
-type event struct {
-	msg *broker.Message
-	err error
-	ctx context.Context
-
-	topic string
-
-	sync.RWMutex
-	ack bool
-}
-
-func (p *event) Context() context.Context {
-	return p.ctx
-}
-
-func (p *event) Topic() string {
-	return p.topic
-}
-
-func (p *event) Message() *broker.Message {
-	return p.msg
-}
-
-func (p *event) Ack() error {
-	p.ack = true
-	return nil
-}
-
-func (p *event) Error() error {
-	return p.err
-}
-
-func (p *event) SetError(err error) {
-	p.err = err
-}
-
-var eventPool = sync.Pool{
-	New: func() interface{} {
-		return &event{msg: &broker.Message{}}
-	},
-}
--- a/go.mod
+++ b/go.mod
@@ -1,32 +1,24 @@
-module go.unistack.org/micro-broker-kgo/v3
+module go.unistack.org/micro-broker-kgo/v4

-go 1.24.0
-
-toolchain go1.24.3
+go 1.23.0

 require (
-	github.com/google/uuid v1.6.0
-	github.com/stretchr/testify v1.11.1
-	github.com/twmb/franz-go v1.20.2
-	github.com/twmb/franz-go/pkg/kadm v1.17.1
-	github.com/twmb/franz-go/pkg/kmsg v1.12.0
-	go.opentelemetry.io/otel v1.38.0
-	go.unistack.org/micro/v3 v3.11.48
+	github.com/twmb/franz-go v1.18.1
+	github.com/twmb/franz-go/pkg/kadm v1.15.0
+	github.com/twmb/franz-go/pkg/kmsg v1.9.0
+	go.opentelemetry.io/otel v1.34.0
+	go.unistack.org/micro/v4 v4.1.4
 )

 require (
 	github.com/ash3in/uuidv8 v1.2.0 // indirect
-	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
-	github.com/klauspost/compress v1.18.1 // indirect
-	github.com/kr/pretty v0.3.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/klauspost/compress v1.18.0 // indirect
 	github.com/matoous/go-nanoid v1.5.1 // indirect
 	github.com/pierrec/lz4/v4 v4.1.22 // indirect
-	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	go.unistack.org/micro-proto/v3 v3.4.1 // indirect
-	golang.org/x/crypto v0.43.0 // indirect
-	golang.org/x/sys v0.37.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20251022142026-3a174f9686a8 // indirect
-	google.golang.org/grpc v1.76.0 // indirect
-	google.golang.org/protobuf v1.36.10 // indirect
+	github.com/spf13/cast v1.7.1 // indirect
+	go.unistack.org/micro-proto/v4 v4.1.0 // indirect
+	golang.org/x/crypto v0.36.0 // indirect
+	google.golang.org/protobuf v1.36.5 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
--- a/go.sum
+++ b/go.sum
@@ -2,19 +2,16 @@ github.com/DATA-DOG/go-sqlmock v1.5.2 h1:OcvFkGmslmlZibjAjaHm3L//6LiuBgolP7Oputl
 github.com/DATA-DOG/go-sqlmock v1.5.2/go.mod h1:88MAG/4G7SMwSE3CeA0ZKzrT5CiOU3OJ+JlNzwDqpNU=
 github.com/ash3in/uuidv8 v1.2.0 h1:2oogGdtCPwaVtyvPPGin4TfZLtOGE5F+W++E880G6SI=
 github.com/ash3in/uuidv8 v1.2.0/go.mod h1:BnU0wJBxnzdEKmVg4xckBkD+VZuecTFTUP3M0dWgyY4=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
-github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
-github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
-github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
+github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
+github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
 github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
-github.com/klauspost/compress v1.18.1 h1:bcSGx7UbpBqMChDtsF28Lw6v/G94LPrrbMbdC3JH2co=
-github.com/klauspost/compress v1.18.1/go.mod h1:ZQFFVG+MdnR0P+l6wpXgIL4NTtwiKIdBnrBd8Nrxr+0=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
@@ -23,50 +20,30 @@ github.com/matoous/go-nanoid v1.5.1 h1:aCjdvTyO9LLnTIi0fgdXhOPPvOHjpXN6Ik9DaNjIc
 github.com/matoous/go-nanoid v1.5.1/go.mod h1:zyD2a71IubI24efhpvkJz+ZwfwagzgSO6UNiFsZKN7U=
 github.com/pierrec/lz4/v4 v4.1.22 h1:cKFw6uJDK+/gfw5BcDL0JL5aBsAFdsIT18eRtLj7VIU=
 github.com/pierrec/lz4/v4 v4.1.22/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
-github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR38lUII=
 github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
-github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
-github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
-github.com/twmb/franz-go v1.19.5 h1:W7+o8D0RsQsedqib71OVlLeZ0zI6CbFra7yTYhZTs5Y=
-github.com/twmb/franz-go v1.19.5/go.mod h1:4kFJ5tmbbl7asgwAGVuyG1ZMx0NNpYk7EqflvWfPCpM=
-github.com/twmb/franz-go v1.20.2 h1:CiwhyKZHW6vqSHJkh+RTxFAJkio0jBjM/JQhx/HZ72A=
-github.com/twmb/franz-go v1.20.2/go.mod h1:YCnepDd4gl6vdzG03I5Wa57RnCTIC6DVEyMpDX/J8UA=
-github.com/twmb/franz-go/pkg/kadm v1.16.1 h1:IEkrhTljgLHJ0/hT/InhXGjPdmWfFvxp7o/MR7vJ8cw=
-github.com/twmb/franz-go/pkg/kadm v1.16.1/go.mod h1:Ue/ye1cc9ipsQFg7udFbbGiFNzQMqiH73fGC2y0rwyc=
-github.com/twmb/franz-go/pkg/kadm v1.17.1 h1:Bt02Y/RLgnFO2NP2HVP1kd2TFtGRiJZx+fSArjZDtpw=
-github.com/twmb/franz-go/pkg/kadm v1.17.1/go.mod h1:s4duQmrDbloVW9QTMXhs6mViTepze7JLG43xwPcAeTg=
-github.com/twmb/franz-go/pkg/kmsg v1.11.2 h1:hIw75FpwcAjgeyfIGFqivAvwC5uNIOWRGvQgZhH4mhg=
-github.com/twmb/franz-go/pkg/kmsg v1.11.2/go.mod h1:CFfkkLysDNmukPYhGzuUcDtf46gQSqCZHMW1T4Z+wDE=
-github.com/twmb/franz-go/pkg/kmsg v1.12.0 h1:CbatD7ers1KzDNgJqPbKOq0Bz/WLBdsTH75wgzeVaPc=
-github.com/twmb/franz-go/pkg/kmsg v1.12.0/go.mod h1:+DPt4NC8RmI6hqb8G09+3giKObE6uD2Eya6CfqBpeJY=
-go.opentelemetry.io/otel v1.38.0 h1:RkfdswUDRimDg0m2Az18RKOsnI8UDzppJAtj01/Ymk8=
-go.opentelemetry.io/otel v1.38.0/go.mod h1:zcmtmQ1+YmQM9wrNsTGV/q/uyusom3P8RxwExxkZhjM=
-go.unistack.org/micro-proto/v3 v3.4.1 h1:UTjLSRz2YZuaHk9iSlVqqsA50JQNAEK2ZFboGqtEa9Q=
-go.unistack.org/micro-proto/v3 v3.4.1/go.mod h1:okx/cnOhzuCX0ggl/vToatbCupi0O44diiiLLsZ93Zo=
-go.unistack.org/micro/v3 v3.11.45 h1:fjTLZYWgsVf9FIMZBxOg8ios2/tmyimnjZrsrxEUeXU=
-go.unistack.org/micro/v3 v3.11.45/go.mod h1:fDQ8Mu9wubaFP0L8hNQlpzHiEnWN0wbOlawN9HYo0N4=
-go.unistack.org/micro/v3 v3.11.48 h1:lHJYSHU2z1TTcuswItGwG7cZXN6n04EFqY7lk/0gA7w=
-go.unistack.org/micro/v3 v3.11.48/go.mod h1:fDQ8Mu9wubaFP0L8hNQlpzHiEnWN0wbOlawN9HYo0N4=
-golang.org/x/crypto v0.43.0 h1:dduJYIi3A3KOfdGOHX8AVZ/jGiyPa3IbBozJ5kNuE04=
-golang.org/x/crypto v0.43.0/go.mod h1:BFbav4mRNlXJL4wNeejLpWxB7wMbc79PdRGhWKncxR0=
-golang.org/x/net v0.45.0 h1:RLBg5JKixCy82FtLJpeNlVM0nrSqpCRYzVU1n8kj0tM=
-golang.org/x/net v0.45.0/go.mod h1:ECOoLqd5U3Lhyeyo/QDCEVQ4sNgYsqvCZ722XogGieY=
-golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
-golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
-golang.org/x/text v0.30.0 h1:yznKA/E9zq54KzlzBEAWn1NXSQ8DIp/NYMy88xJjl4k=
-golang.org/x/text v0.30.0/go.mod h1:yDdHFIX9t+tORqspjENWgzaCVXgk0yYnYuSZ8UzzBVM=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251007200510-49b9836ed3ff h1:A90eA31Wq6HOMIQlLfzFwzqGKBTuaVztYu/g8sn+8Zc=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251007200510-49b9836ed3ff/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251022142026-3a174f9686a8 h1:M1rk8KBnUsBDg1oPGHNCxG4vc1f49epmTO7xscSajMk=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20251022142026-3a174f9686a8/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
-google.golang.org/grpc v1.76.0 h1:UnVkv1+uMLYXoIz6o7chp59WfQUYA2ex/BXQ9rHZu7A=
-google.golang.org/grpc v1.76.0/go.mod h1:Ju12QI8M6iQJtbcsV+awF5a4hfJMLi4X0JLo94ULZ6c=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+github.com/spf13/cast v1.7.1 h1:cuNEagBQEHWN1FnbGEjCXL2szYEXqfJPbP2HNUaca9Y=
+github.com/spf13/cast v1.7.1/go.mod h1:ancEpBxwJDODSW/UG4rDrAqiKolqNNh2DX3mk86cAdo=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/twmb/franz-go v1.18.1 h1:D75xxCDyvTqBSiImFx2lkPduE39jz1vaD7+FNc+vMkc=
+github.com/twmb/franz-go v1.18.1/go.mod h1:Uzo77TarcLTUZeLuGq+9lNpSkfZI+JErv7YJhlDjs9M=
+github.com/twmb/franz-go/pkg/kadm v1.15.0 h1:Yo3NAPfcsx3Gg9/hdhq4vmwO77TqRRkvpUcGWzjworc=
+github.com/twmb/franz-go/pkg/kadm v1.15.0/go.mod h1:MUdcUtnf9ph4SFBLLA/XxE29rvLhWYLM9Ygb8dfSCvw=
+github.com/twmb/franz-go/pkg/kmsg v1.9.0 h1:JojYUph2TKAau6SBtErXpXGC7E3gg4vGZMv9xFU/B6M=
+github.com/twmb/franz-go/pkg/kmsg v1.9.0/go.mod h1:CMbfazviCyY6HM0SXuG5t9vOwYDHRCSrJJyBAe5paqg=
+go.opentelemetry.io/otel v1.34.0 h1:zRLXxLCgL1WyKsPVrgbSdMN4c0FMkDAskSTQP+0hdUY=
+go.opentelemetry.io/otel v1.34.0/go.mod h1:OWFPOQ+h4G8xpyjgqo4SxJYdDQ/qmRH+wivy7zzx9oI=
+go.unistack.org/micro-proto/v4 v4.1.0 h1:qPwL2n/oqh9RE3RTTDgt28XK3QzV597VugQPaw9lKUk=
+go.unistack.org/micro-proto/v4 v4.1.0/go.mod h1:ArmK7o+uFvxSY3dbJhKBBX4Pm1rhWdLEFf3LxBrMtec=
+go.unistack.org/micro/v4 v4.1.4 h1:gyjVPP9g7UAFZlhEbla9Ih/BeKJfBLAbN/NvAhJCpKU=
+go.unistack.org/micro/v4 v4.1.4/go.mod h1:lr3oYED8Ay1vjK68QqRw30QOtdk/ffpZqMFDasOUhKw=
+golang.org/x/crypto v0.36.0 h1:AnAEvhDddvBdpY+uR+MyHmuZzzNqXSe/GvuDeob5L34=
+golang.org/x/crypto v0.36.0/go.mod h1:Y4J0ReaxCR1IMaabaSMugxJES1EpwhBHhv2bDHklZvc=
+google.golang.org/protobuf v1.36.5 h1:tPhr+woSbjfYvY6/GPufUoYizxw1cF/yFoxJ2fmpwlM=
+google.golang.org/protobuf v1.36.5/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
--- a/hook_event_test.go
+++ b/hook_event_test.go
@@ -1,362 +0,0 @@
-package kgo
-
-import (
-	"context"
-	"errors"
-	"io"
-	"net"
-	"os"
-	"testing"
-
-	"github.com/stretchr/testify/require"
-	"github.com/twmb/franz-go/pkg/kgo"
-	"go.unistack.org/micro/v3/logger"
-)
-
-func TestHookEvent_OnGroupManageError(t *testing.T) {
-	tests := []struct {
-		name                  string
-		inputErr              error
-		expectedErrorIsCalled bool
-		expectedErrorMsg      string
-	}{
-		{
-			name:                  "error is nil",
-			inputErr:              nil,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "context canceled",
-			inputErr:              context.Canceled,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "context deadline exceeded",
-			inputErr:              context.DeadlineExceeded,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: deadline exceeded (os package)",
-			inputErr:              os.ErrDeadlineExceeded,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: EOF (io package)",
-			inputErr:              io.EOF,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: closed network connection (net package)",
-			inputErr:              net.ErrClosed,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "some error",
-			inputErr:              errors.New("some error"),
-			expectedErrorIsCalled: true,
-			expectedErrorMsg:      "kgo.OnGroupManageError",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			log := &mockLogger{}
-			he := &hookEvent{log: log}
-			he.OnGroupManageError(tt.inputErr)
-			require.Equal(t, tt.expectedErrorIsCalled, log.errorIsCalled)
-			require.Equal(t, tt.expectedErrorMsg, log.errorMsg)
-		})
-	}
-}
-
-func TestHookEvent_OnBrokerConnect(t *testing.T) {
-	tests := []struct {
-		name                  string
-		inputErr              error
-		expectedErrorIsCalled bool
-		expectedErrorMsg      string
-	}{
-		{
-			name:                  "error is nil",
-			inputErr:              nil,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "context canceled",
-			inputErr:              context.Canceled,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "context deadline exceeded",
-			inputErr:              context.DeadlineExceeded,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: deadline exceeded (os package)",
-			inputErr:              os.ErrDeadlineExceeded,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: EOF (io package)",
-			inputErr:              io.EOF,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: closed network connection (net package)",
-			inputErr:              net.ErrClosed,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "some error",
-			inputErr:              errors.New("some error"),
-			expectedErrorIsCalled: true,
-			expectedErrorMsg:      "kgo.OnBrokerConnect",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			log := &mockLogger{}
-			he := &hookEvent{log: log}
-			he.OnBrokerConnect(kgo.BrokerMetadata{}, 0, nil, tt.inputErr)
-			require.Equal(t, tt.expectedErrorIsCalled, log.errorIsCalled)
-			require.Equal(t, tt.expectedErrorMsg, log.errorMsg)
-		})
-	}
-}
-
-func TestHookEvent_OnBrokerWrite(t *testing.T) {
-	tests := []struct {
-		name                  string
-		inputErr              error
-		expectedErrorIsCalled bool
-		expectedErrorMsg      string
-	}{
-		{
-			name:                  "error is nil",
-			inputErr:              nil,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "context canceled",
-			inputErr:              context.Canceled,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "context deadline exceeded",
-			inputErr:              context.DeadlineExceeded,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: deadline exceeded (os package)",
-			inputErr:              os.ErrDeadlineExceeded,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: EOF (io package)",
-			inputErr:              io.EOF,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: closed network connection (net package)",
-			inputErr:              net.ErrClosed,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "some error",
-			inputErr:              errors.New("some error"),
-			expectedErrorIsCalled: true,
-			expectedErrorMsg:      "kgo.OnBrokerWrite",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			log := &mockLogger{}
-			he := &hookEvent{log: log}
-			he.OnBrokerWrite(kgo.BrokerMetadata{}, 0, 0, 0, 0, tt.inputErr)
-			require.Equal(t, tt.expectedErrorIsCalled, log.errorIsCalled)
-			require.Equal(t, tt.expectedErrorMsg, log.errorMsg)
-		})
-	}
-}
-
-func TestHookEvent_OnBrokerRead(t *testing.T) {
-	tests := []struct {
-		name                  string
-		inputErr              error
-		expectedErrorIsCalled bool
-		expectedErrorMsg      string
-	}{
-		{
-			name:                  "error is nil",
-			inputErr:              nil,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "context canceled",
-			inputErr:              context.Canceled,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "context deadline exceeded",
-			inputErr:              context.DeadlineExceeded,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: deadline exceeded (os package)",
-			inputErr:              os.ErrDeadlineExceeded,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: EOF (io package)",
-			inputErr:              io.EOF,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: closed network connection (net package)",
-			inputErr:              net.ErrClosed,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "some error",
-			inputErr:              errors.New("some error"),
-			expectedErrorIsCalled: true,
-			expectedErrorMsg:      "kgo.OnBrokerRead",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			log := &mockLogger{}
-			he := &hookEvent{log: log}
-			he.OnBrokerRead(kgo.BrokerMetadata{}, 0, 0, 0, 0, tt.inputErr)
-			require.Equal(t, tt.expectedErrorIsCalled, log.errorIsCalled)
-			require.Equal(t, tt.expectedErrorMsg, log.errorMsg)
-		})
-	}
-}
-
-func TestHookEvent_OnProduceRecordUnbuffered(t *testing.T) {
-	tests := []struct {
-		name                  string
-		inputErr              error
-		expectedErrorIsCalled bool
-		expectedErrorMsg      string
-	}{
-		{
-			name:                  "error is nil",
-			inputErr:              nil,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "context canceled",
-			inputErr:              context.Canceled,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "context deadline exceeded",
-			inputErr:              context.DeadlineExceeded,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: deadline exceeded (os package)",
-			inputErr:              os.ErrDeadlineExceeded,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: EOF (io package)",
-			inputErr:              io.EOF,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "retryable error: closed network connection (net package)",
-			inputErr:              net.ErrClosed,
-			expectedErrorIsCalled: false,
-		},
-		{
-			name:                  "some error",
-			inputErr:              errors.New("some error"),
-			expectedErrorIsCalled: true,
-			expectedErrorMsg:      "kgo.OnProduceRecordUnbuffered",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			log := &mockLogger{}
-			he := &hookEvent{log: log}
-			he.OnProduceRecordUnbuffered(&kgo.Record{}, tt.inputErr)
-			require.Equal(t, tt.expectedErrorIsCalled, log.errorIsCalled)
-			require.Equal(t, tt.expectedErrorMsg, log.errorMsg)
-		})
-	}
-}
-
-// Mocks
-
-type mockLogger struct {
-	errorIsCalled bool
-	errorMsg      string
-}
-
-func (m *mockLogger) Init(...logger.Option) error {
-	panic("implement me")
-}
-
-func (m *mockLogger) Clone(...logger.Option) logger.Logger {
-	panic("implement me")
-}
-
-func (m *mockLogger) V(logger.Level) bool {
-	panic("implement me")
-}
-
-func (m *mockLogger) Level(logger.Level) {
-	panic("implement me")
-}
-
-func (m *mockLogger) Options() logger.Options {
-	panic("implement me")
-}
-
-func (m *mockLogger) Fields(...interface{}) logger.Logger {
-	panic("implement me")
-}
-
-func (m *mockLogger) Info(context.Context, string, ...interface{}) {
-	panic("implement me")
-}
-
-func (m *mockLogger) Trace(context.Context, string, ...interface{}) {
-	panic("implement me")
-}
-
-func (m *mockLogger) Debug(context.Context, string, ...interface{}) {
-	panic("implement me")
-}
-
-func (m *mockLogger) Warn(context.Context, string, ...interface{}) {
-	panic("implement me")
-}
-
-func (m *mockLogger) Error(ctx context.Context, msg string, args ...interface{}) {
-	m.errorIsCalled = true
-	m.errorMsg = msg
-}
-
-func (m *mockLogger) Fatal(context.Context, string, ...interface{}) {
-	panic("implement me")
-}
-
-func (m *mockLogger) Log(context.Context, logger.Level, string, ...interface{}) {
-	panic("implement me")
-}
-
-func (m *mockLogger) Name() string {
-	panic("implement me")
-}
-
-func (m *mockLogger) String() string {
-	panic("implement me")
-}
--- a/kgo.go
+++ b/kgo.go
@@ -6,27 +6,32 @@ import (
 	"errors"
 	"fmt"
 	"math/rand/v2"
-	"strconv"
 	"strings"
 	"sync"
 	"sync/atomic"
 	"time"

-	"github.com/google/uuid"
-	"github.com/twmb/franz-go/pkg/kadm"
 	"github.com/twmb/franz-go/pkg/kgo"
 	"github.com/twmb/franz-go/pkg/kmsg"
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/semconv"
-	"go.unistack.org/micro/v3/tracer"
-	mjitter "go.unistack.org/micro/v3/util/jitter"
-	mrand "go.unistack.org/micro/v3/util/rand"
+	"go.unistack.org/micro/v4/broker"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/semconv"
+	"go.unistack.org/micro/v4/tracer"
+	"go.unistack.org/micro/v4/util/id"
+	mrand "go.unistack.org/micro/v4/util/rand"
 )

 var _ broker.Broker = (*Broker)(nil)

+var messagePool = sync.Pool{
+	New: func() interface{} {
+		return &kgoMessage{}
+	},
+}
+
 var ErrLostMessage = errors.New("message not marked for offsets commit and will be lost in next iteration")

 var DefaultRetryBackoffFn = func() func(int) time.Duration {
@@ -59,17 +64,17 @@ var DefaultRetryBackoffFn = func() func(int) time.Duration {
 }()

 type Broker struct {
+	funcPublish   broker.FuncPublish
+	funcSubscribe broker.FuncSubscribe
 	c             *kgo.Client
 	connected     *atomic.Uint32

-	done chan struct{}
-
 	kopts []kgo.Opt
 	subs  []*Subscriber

 	opts broker.Options
-	mu   sync.RWMutex

+	sync.RWMutex
 	init bool
 }

@@ -97,6 +102,68 @@ func (k *Broker) Client() *kgo.Client {
 	return k.c
 }

+type kgoMessage struct {
+	c     codec.Codec
+	topic string
+	ctx   context.Context
+	body  []byte
+	hdr   metadata.Metadata
+	opts  broker.PublishOptions
+	ack   bool
+}
+
+func (m *kgoMessage) Ack() error {
+	m.ack = true
+	return nil
+}
+
+func (m *kgoMessage) Body() []byte {
+	return m.body
+}
+
+func (m *kgoMessage) Header() metadata.Metadata {
+	return m.hdr
+}
+
+func (m *kgoMessage) Context() context.Context {
+	return m.ctx
+}
+
+func (m *kgoMessage) Topic() string {
+	return ""
+}
+
+func (m *kgoMessage) Unmarshal(dst interface{}, opts ...codec.Option) error {
+	return m.c.Unmarshal(m.body, dst)
+}
+
+func (b *Broker) newCodec(ct string) (codec.Codec, error) {
+	if idx := strings.IndexRune(ct, ';'); idx >= 0 {
+		ct = ct[:idx]
+	}
+	b.RLock()
+	c, ok := b.opts.Codecs[ct]
+	b.RUnlock()
+	if ok {
+		return c, nil
+	}
+	return nil, codec.ErrUnknownContentType
+}
+
+func (b *Broker) NewMessage(ctx context.Context, hdr metadata.Metadata, body interface{}, opts ...broker.PublishOption) (broker.Message, error) {
+	options := broker.NewPublishOptions(opts...)
+	m := &kgoMessage{ctx: ctx, hdr: hdr, opts: options}
+	c, err := b.newCodec(m.opts.ContentType)
+	if err == nil {
+		m.body, err = c.Marshal(body)
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	return m, nil
+}
+
 func (k *Broker) connect(ctx context.Context, opts ...kgo.Opt) (*kgo.Client, *hookTracer, error) {
 	var c *kgo.Client
 	var err error
@@ -148,25 +215,6 @@ func (k *Broker) connect(ctx context.Context, opts ...kgo.Opt) (*kgo.Client, *ho
 			return nil, nil, err
 		}
 		k.connected.Store(1)
-
-		if fatalOnError {
-			go func() {
-				c := 3
-				n := 0
-				tc := mjitter.NewTicker(500*time.Millisecond, 1*time.Second)
-				defer tc.Stop()
-				for range tc.C {
-					if k.connected.Load() == 0 {
-						if n > c {
-							k.opts.Logger.Fatal(context.Background(), "broker fatal error")
-						}
-						n++
-					} else {
-						n = 0
-					}
-				}
-			}()
-		}
 		return c, htracer, nil
 	}
 }
@@ -186,72 +234,10 @@ func (k *Broker) Connect(ctx context.Context) error {
 		return err
 	}

-	k.mu.Lock()
+	k.Lock()
 	k.c = c
 	k.connected.Store(1)
-	k.mu.Unlock()
-
-	exposeLag := false
-	if k.opts.Context != nil {
-		if v, ok := k.opts.Context.Value(exposeLagKey{}).(bool); ok && v {
-			exposeLag = v
-		}
-	}
-
-	if exposeLag {
-		var mu sync.Mutex
-		var lastUpdate time.Time
-		type pl struct {
-			p string
-			l float64
-		}
-
-		lag := make(map[string]map[string]pl) // topic => group => partition => lag
-		ac := kadm.NewClient(k.c)
-
-		updateStats := func() {
-			mu.Lock()
-			if time.Since(lastUpdate) < DefaultStatsInterval {
-				return
-			}
-			mu.Unlock()
-
-			k.mu.Lock()
-			groups := make([]string, 0, len(k.subs))
-			for _, g := range k.subs {
-				groups = append(groups, g.opts.Group)
-			}
-			k.mu.Unlock()
-
-			dgls, err := ac.Lag(ctx, groups...)
-			if err != nil || !dgls.Ok() {
-				k.opts.Logger.Error(k.opts.Context, "kgo describe group lag error", err)
-				return
-			}
-
-			for gn, dgl := range dgls {
-				for tn, lmap := range dgl.Lag {
-					if _, ok := lag[tn]; !ok {
-						lag[tn] = make(map[string]pl)
-					}
-					for p, l := range lmap {
-						lag[tn][gn] = pl{p: strconv.Itoa(int(p)), l: float64(l.Lag)}
-					}
-				}
-			}
-		}
-
-		for tn, dg := range lag {
-			for gn, gl := range dg {
-				k.opts.Meter.Gauge(semconv.BrokerGroupLag,
-					func() float64 { updateStats(); return gl.l },
-					"topic", tn,
-					"group", gn,
-					"partition", gl.p)
-			}
-		}
-
-	}
+	k.Unlock()

 	return nil
 }
@@ -269,8 +255,8 @@ func (k *Broker) Disconnect(ctx context.Context) error {
 	ctx, span = k.opts.Tracer.Start(ctx, "Disconnect")
 	defer span.Finish()

-	k.mu.Lock()
-	defer k.mu.Unlock()
+	k.Lock()
+	defer k.Unlock()
 	select {
 	case <-nctx.Done():
 		return nctx.Err()
@@ -290,13 +276,12 @@ func (k *Broker) Disconnect(ctx context.Context) error {
 	}

 	k.connected.Store(0)
-	close(k.done)
 	return nil
 }

 func (k *Broker) Init(opts ...broker.Option) error {
-	k.mu.Lock()
-	defer k.mu.Unlock()
+	k.Lock()
+	defer k.Unlock()

 	if len(opts) == 0 && k.init {
 		return nil
@@ -325,6 +310,18 @@ func (k *Broker) Init(opts ...broker.Option) error {
 		}
 	}

+	k.funcPublish = k.fnPublish
+	k.funcSubscribe = k.fnSubscribe
+
+	k.opts.Hooks.EachPrev(func(hook options.Hook) {
+		switch h := hook.(type) {
+		case broker.HookPublish:
+			k.funcPublish = h(k.funcPublish)
+		case broker.HookSubscribe:
+			k.funcSubscribe = h(k.funcSubscribe)
+		}
+	})
+
 	k.init = true

 	return nil
@@ -334,83 +331,88 @@ func (k *Broker) Options() broker.Options {
 	return k.opts
 }

-func (k *Broker) BatchPublish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
-	return k.publish(ctx, msgs, opts...)
+func (b *Broker) Publish(ctx context.Context, topic string, messages ...broker.Message) error {
+	return b.funcPublish(ctx, topic, messages...)
 }

-func (k *Broker) Publish(ctx context.Context, topic string, msg *broker.Message, opts ...broker.PublishOption) error {
-	msg.Header.Set(metadata.HeaderTopic, topic)
-	return k.publish(ctx, []*broker.Message{msg}, opts...)
+func (b *Broker) fnPublish(ctx context.Context, topic string, messages ...broker.Message) error {
+	return b.publish(ctx, topic, messages...)
 }

-func (k *Broker) publish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
-	options := broker.NewPublishOptions(opts...)
-	records := make([]*kgo.Record, 0, len(msgs))
+func (b *Broker) publish(ctx context.Context, topic string, messages ...broker.Message) error {
+	if b.connected.Load() == 0 {
+		c, _, err := b.connect(ctx, b.kopts...)
+		if err != nil {
+			return err
+		}
+		b.Lock()
+		b.c = c
+		b.Unlock()
+	}
+
+	records := make([]*kgo.Record, 0, len(messages))
 	var errs []string
-	var err error
 	var key []byte
 	var promise func(*kgo.Record, error)

-	if options.Context != nil {
-		if k, ok := options.Context.Value(publishKey{}).([]byte); ok && k != nil {
+	for _, msg := range messages {
+
+		if mctx := msg.Context(); mctx != nil {
+			if k, ok := mctx.Value(publishKey{}).([]byte); ok && k != nil {
 				key = k
 			}
-		if p, ok := options.Context.Value(publishPromiseKey{}).(func(*kgo.Record, error)); ok && p != nil {
+			if p, ok := mctx.Value(publishPromiseKey{}).(func(*kgo.Record, error)); ok && p != nil {
 				promise = p
 			}
 		}

-	for _, msg := range msgs {
-		rec := &kgo.Record{Context: ctx, Key: key}
-
-		rec.Topic, _ = msg.Header.Get(metadata.HeaderTopic)
-		msg.Header.Del(metadata.HeaderTopic)
-
-		k.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", rec.Topic, "topic", rec.Topic).Inc()
-		if options.BodyOnly || k.opts.Codec.String() == "noop" {
-			rec.Value = msg.Body
-			setHeaders(rec, msg.Header)
-		} else {
-			rec.Value, err = k.opts.Codec.Marshal(msg)
-			if err != nil {
-				return err
-			}
+		rec := &kgo.Record{
+			Context: ctx,
+			Key:     key,
+			Topic:   topic,
+			Value:   msg.Body(),
 		}
+
+		b.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", rec.Topic, "topic", rec.Topic).Inc()
+
+		setHeaders(rec, msg.Header())
+
 		records = append(records, rec)
 	}

-	if promise != nil {
 	ts := time.Now()
+
+	if promise != nil {
+
 		for _, rec := range records {
-			k.c.Produce(ctx, rec, func(r *kgo.Record, err error) {
+			b.c.Produce(ctx, rec, func(r *kgo.Record, err error) {
 				te := time.Since(ts)
-				k.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", rec.Topic, "topic", rec.Topic).Dec()
-				k.opts.Meter.Summary(semconv.PublishMessageLatencyMicroseconds, "endpoint", rec.Topic, "topic", rec.Topic).Update(te.Seconds())
-				k.opts.Meter.Histogram(semconv.PublishMessageDurationSeconds, "endpoint", rec.Topic, "topic", rec.Topic).Update(te.Seconds())
+				b.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", rec.Topic, "topic", rec.Topic).Dec()
+				b.opts.Meter.Summary(semconv.PublishMessageLatencyMicroseconds, "endpoint", rec.Topic, "topic", rec.Topic).Update(te.Seconds())
+				b.opts.Meter.Histogram(semconv.PublishMessageDurationSeconds, "endpoint", rec.Topic, "topic", rec.Topic).Update(te.Seconds())
 				if err != nil {
-					k.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", rec.Topic, "topic", rec.Topic, "status", "failure").Inc()
+					b.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", rec.Topic, "topic", rec.Topic, "status", "failure").Inc()
 				} else {
-					k.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", rec.Topic, "topic", rec.Topic, "status", "success").Inc()
+					b.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", rec.Topic, "topic", rec.Topic, "status", "success").Inc()
 				}
 				promise(r, err)
 			})
 		}
 		return nil
 	}
-	ts := time.Now()

-	results := k.c.ProduceSync(ctx, records...)
+	results := b.c.ProduceSync(ctx, records...)

 	te := time.Since(ts)
 	for _, result := range results {
-		k.opts.Meter.Summary(semconv.PublishMessageLatencyMicroseconds, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Update(te.Seconds())
-		k.opts.Meter.Histogram(semconv.PublishMessageDurationSeconds, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Update(te.Seconds())
-		k.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Dec()
+		b.opts.Meter.Summary(semconv.PublishMessageLatencyMicroseconds, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Update(te.Seconds())
+		b.opts.Meter.Histogram(semconv.PublishMessageDurationSeconds, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Update(te.Seconds())
+		b.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Dec()
 		if result.Err != nil {
-			k.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", result.Record.Topic, "topic", result.Record.Topic, "status", "failure").Inc()
+			b.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", result.Record.Topic, "topic", result.Record.Topic, "status", "failure").Inc()
 			errs = append(errs, result.Err.Error())
 		} else {
-			k.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", result.Record.Topic, "topic", result.Record.Topic, "status", "success").Inc()
+			b.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", result.Record.Topic, "topic", result.Record.Topic, "status", "success").Inc()
 		}
 	}

@@ -437,31 +439,50 @@ func (k *Broker) TopicExists(ctx context.Context, topic string) error {
 	return nil
 }

-func (k *Broker) BatchSubscribe(_ context.Context, _ string, _ broker.BatchHandler, _ ...broker.SubscribeOption) (broker.Subscriber, error) {
-	return nil, nil
+func (b *Broker) Subscribe(ctx context.Context, topic string, handler interface{}, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
+	return b.funcSubscribe(ctx, topic, handler, opts...)
+}
+
+func (b *Broker) fnSubscribe(ctx context.Context, topic string, handler interface{}, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
+	if err := broker.IsValidHandler(handler); err != nil {
+		return nil, err
 	}

-func (k *Broker) Subscribe(ctx context.Context, topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
 	options := broker.NewSubscribeOptions(opts...)

+	switch handler.(type) {
+	default:
+		return nil, broker.ErrInvalidHandler
+	case func(broker.Message) error:
+		break
+	case func([]broker.Message) error:
+		break
+	}
+
 	if options.Group == "" {
-		uid, err := uuid.NewRandom()
+		uid, err := id.New()
 		if err != nil {
 			return nil, err
 		}
-		options.Group = uid.String()
+		options.Group = uid
 	}

 	commitInterval := DefaultCommitInterval
-	if k.opts.Context != nil {
-		if v, ok := k.opts.Context.Value(commitIntervalKey{}).(time.Duration); ok && v > 0 {
+	if b.opts.Context != nil {
+		if v, ok := b.opts.Context.Value(commitIntervalKey{}).(time.Duration); ok && v > 0 {
 			commitInterval = v
 		}
 	}

 	var fatalOnError bool
-	if k.opts.Context != nil {
-		if v, ok := k.opts.Context.Value(fatalOnErrorKey{}).(bool); ok && v {
+	if b.opts.Context != nil {
+		if v, ok := b.opts.Context.Value(fatalOnErrorKey{}).(bool); ok && v {
+			fatalOnError = v
+		}
+	}
+
+	if options.Context != nil {
+		if v, ok := options.Context.Value(fatalOnErrorKey{}).(bool); ok && v {
 			fatalOnError = v
 		}
 	}
@@ -470,14 +491,14 @@ func (k *Broker) Subscribe(ctx context.Context, topic string, handler broker.Han
 		topic:        topic,
 		opts:         options,
 		handler:      handler,
-		kopts:        k.opts,
+		kopts:        b.opts,
 		consumers:    make(map[tp]*consumer),
 		done:         make(chan struct{}),
 		fatalOnError: fatalOnError,
-		connected:    k.connected,
+		connected:    b.connected,
 	}

-	kopts := append(k.kopts,
+	kopts := append(b.kopts,
 		kgo.ConsumerGroup(options.Group),
 		kgo.ConsumeTopics(topic),
 		kgo.ConsumeResetOffset(kgo.NewOffset().AtStart()),
@@ -497,7 +518,7 @@ func (k *Broker) Subscribe(ctx context.Context, topic string, handler broker.Han
 		}
 	}

-	c, htracer, err := k.connect(ctx, kopts...)
+	c, htracer, err := b.connect(ctx, kopts...)
 	if err != nil {
 		return nil, err
 	}
@@ -519,9 +540,10 @@ func (k *Broker) Subscribe(ctx context.Context, topic string, handler broker.Han

 	go sub.poll(ctx)

-	k.mu.Lock()
-	k.subs = append(k.subs, sub)
-	k.mu.Unlock()
+	b.Lock()
+	b.subs = append(b.subs, sub)
+	b.Unlock()
+
 	return sub, nil
 }

@@ -561,6 +583,5 @@ func NewBroker(opts ...broker.Option) *Broker {
 		connected: &atomic.Uint32{},
 		opts:      options,
 		kopts:     kopts,
-		done:      make(chan struct{}),
 	}
 }
--- a/kgo_test.go
+++ b/kgo_test.go
@@ -9,11 +9,11 @@ import (
 	"time"

 	kg "github.com/twmb/franz-go/pkg/kgo"
-	kgo "go.unistack.org/micro-broker-kgo/v3"
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/logger/slog"
-	"go.unistack.org/micro/v3/metadata"
+	kgo "go.unistack.org/micro-broker-kgo/v4"
+	"go.unistack.org/micro/v4/broker"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/logger/slog"
+	"go.unistack.org/micro/v4/metadata"
 )

 var (
@@ -23,11 +23,6 @@ var (
 	loglevel = logger.DebugLevel
 )

-var bm = &broker.Message{
-	Header: map[string]string{"hkey": "hval", metadata.HeaderTopic: "test"},
-	Body:   []byte(`"body"`),
-}
-
 func TestFail(t *testing.T) {
 	if tr := os.Getenv("INTEGRATION_TESTS"); len(tr) > 0 {
 		t.Skip()
@@ -72,9 +67,10 @@ func TestFail(t *testing.T) {
 	}()

 	t.Logf("broker health %v", b.Health())
-	msgs := make([]*broker.Message, 0, msgcnt)
+	msgs := make([]broker.Message, 0, msgcnt)
 	for i := int64(0); i < msgcnt; i++ {
-		msgs = append(msgs, bm)
+		m, _ := b.NewMessage(ctx, metadata.Pairs("hkey", "hval"), []byte(`test`))
+		msgs = append(msgs, m)
 	}

 	for _, msg := range msgs {
@@ -86,7 +82,7 @@ func TestFail(t *testing.T) {
 	//	t.Skip()

 	idx := int64(0)
-	fn := func(msg broker.Event) error {
+	fn := func(msg broker.Message) error {
 		atomic.AddInt64(&idx, 1)
 		time.Sleep(500 * time.Millisecond)
 		t.Logf("ack")
@@ -117,10 +113,6 @@ func TestFail(t *testing.T) {
 }

 func TestConnect(t *testing.T) {
-	if tr := os.Getenv("INTEGRATION_TESTS"); len(tr) > 0 {
-		t.Skip()
-	}
-
 	var addrs []string
 	ctx := context.TODO()
 	b := kgo.NewBroker(
@@ -174,19 +166,20 @@ func TestPubSub(t *testing.T) {
 		}
 	}()
 	if prefill {
-		msgs := make([]*broker.Message, 0, msgcnt)
+		msgs := make([]broker.Message, 0, msgcnt)
 		for i := int64(0); i < msgcnt; i++ {
-			msgs = append(msgs, bm)
+			m, _ := b.NewMessage(ctx, metadata.Pairs("hkey", "hval"), []byte(`test`))
+			msgs = append(msgs, m)
 		}

-		if err := b.BatchPublish(ctx, msgs); err != nil {
+		if err := b.Publish(ctx, "test", msgs...); err != nil {
 			t.Fatal(err)
 		}
 		//	t.Skip()
 	}
 	done := make(chan bool, 1)
 	idx := int64(0)
-	fn := func(msg broker.Event) error {
+	fn := func(msg broker.Message) error {
 		atomic.AddInt64(&idx, 1)
 		// time.Sleep(200 * time.Millisecond)
 		return msg.Ack()
--- a/logger.go
+++ b/logger.go
@@ -4,7 +4,7 @@ import (
 	"context"

 	"github.com/twmb/franz-go/pkg/kgo"
-	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v4/logger"
 )

 type mlogger struct {
--- a/meter.go
+++ b/meter.go
@@ -6,7 +6,7 @@ import (
 	"time"

 	"github.com/twmb/franz-go/pkg/kgo"
-	"go.unistack.org/micro/v3/meter"
+	"go.unistack.org/micro/v4/meter"
 )

 type hookMeter struct {
@@ -32,27 +32,27 @@ var (
 )

 const (
-	metricBrokerConnects    = "micro_broker_connects_total"
-	metricBrokerDisconnects = "micro_broker_disconnects_total"
+	metricBrokerConnects    = "broker_connects_total"
+	metricBrokerDisconnects = "broker_disconnects_total"

-	metricBrokerWriteErrors        = "micro_broker_write_errors_total"
-	metricBrokerWriteBytes         = "micro_broker_write_bytes_total"
-	metricBrokerWriteWaitLatencies = "micro_broker_write_wait_latencies"
-	metricBrokerWriteLatencies     = "micro_broker_write_latencies"
+	metricBrokerWriteErrors        = "broker_write_errors_total"
+	metricBrokerWriteBytes         = "broker_write_bytes_total"
+	metricBrokerWriteWaitLatencies = "broker_write_wait_latencies"
+	metricBrokerWriteLatencies     = "broker_write_latencies"

-	metricBrokerReadErrors        = "micro_broker_read_errors_total"
-	metricBrokerReadBytes         = "micro_broker_read_bytes_total"
-	metricBrokerReadWaitLatencies = "micro_broker_read_wait_latencies"
-	metricBrokerReadLatencies     = "micro_broker_read_latencies"
+	metricBrokerReadErrors        = "broker_read_errors_total"
+	metricBrokerReadBytes         = "broker_read_bytes_total"
+	metricBrokerReadWaitLatencies = "broker_read_wait_latencies"
+	metricBrokerReadLatencies     = "broker_read_latencies"

-	metricBrokerThrottleLatencies = "micro_broker_throttle_latencies"
+	metricBrokerThrottleLatencies = "broker_throttle_latencies"

-	metricBrokerProduceBytesCompressed   = "micro_broker_produce_bytes_compressed_total"
-	metricBrokerProduceBytesUncompressed = "micro_broker_produce_bytes_uncompressed_total"
-	metricBrokerFetchBytesCompressed     = "micro_broker_consume_bytes_compressed_total"
-	metricBrokerFetchBytesUncompressed   = "micro_broker_consume_bytes_uncompressed_total"
+	metricBrokerProduceBytesCompressed   = "broker_produce_bytes_compressed_total"
+	metricBrokerProduceBytesUncompressed = "broker_produce_bytes_uncompressed_total"
+	metricBrokerFetchBytesCompressed     = "broker_consume_bytes_compressed_total"
+	metricBrokerFetchBytesUncompressed   = "broker_consume_bytes_uncompressed_total"

-	metricBrokerGroupErrors = "micro_broker_group_errors_total"
+	metricBrokerGroupErrors = "broker_group_errors_total"

 	labelNode    = "node_id"
 	labelSuccess = "success"
--- a/options.go
+++ b/options.go
@@ -5,8 +5,7 @@ import (
 	"time"

 	"github.com/twmb/franz-go/pkg/kgo"
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v4/broker"
 )

 var (
@@ -15,7 +14,7 @@ var (
 	DefaultCommitInterval = 5 * time.Second

 	// DefaultStatsInterval specifies how fast check consumer lag
-	DefaultStatsInterval = 30 * time.Second
+	DefaultStatsInterval = 5 * time.Second

 	// DefaultSubscribeMaxInflight specifies how much messages keep inflight
 	DefaultSubscribeMaxInflight = 100
@@ -35,11 +34,6 @@ func PublishKey(key []byte) broker.PublishOption {
 	return broker.SetPublishOption(publishKey{}, key)
 }

-// ClientPublishKey set the kafka message key (client option)
-func ClientPublishKey(key []byte) client.PublishOption {
-	return client.SetPublishOption(publishKey{}, key)
-}
-
 type optionsKey struct{}

 // Options pass additional options to broker
@@ -115,15 +109,3 @@ type publishPromiseKey struct{}
 func PublishPromise(fn func(*kgo.Record, error)) broker.PublishOption {
 	return broker.SetPublishOption(publishPromiseKey{}, fn)
 }
-
-// ClientPublishKey set the kafka message key (client option)
-func ClientPublishPromise(fn func(*kgo.Record, error)) client.PublishOption {
-	return client.SetPublishOption(publishPromiseKey{}, fn)
-}
-
-type exposeLagKey struct{}
-
-// ExposeLag enabled subscriber lag via [meter.Meter]
-func ExposeLag(b bool) broker.Option {
-	return broker.SetOption(exposeLagKey{}, b)
-}
--- a/subscriber.go
+++ b/subscriber.go
@@ -8,13 +8,14 @@ import (
 	"sync/atomic"
 	"time"

+	"github.com/twmb/franz-go/pkg/kadm"
 	"github.com/twmb/franz-go/pkg/kgo"
 	"github.com/twmb/franz-go/pkg/kmsg"
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/semconv"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/broker"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/semconv"
+	"go.unistack.org/micro/v4/tracer"
 )

 type tp struct {
@@ -24,43 +25,33 @@ type tp struct {

 type consumer struct {
 	topic     string
-
 	c         *kgo.Client
 	htracer   *hookTracer
-	connected *atomic.Uint32
-
 	quit      chan struct{}
 	done      chan struct{}
 	recs      chan kgo.FetchTopicPartition
-
-	handler broker.Handler
-
 	kopts     broker.Options
-	opts  broker.SubscribeOptions
-
 	partition int32
+	opts      broker.SubscribeOptions
+	handler   interface{}
+	connected *atomic.Uint32
 }

 type Subscriber struct {
-	topic string
-
 	consumers map[tp]*consumer
-
 	c         *kgo.Client
 	htracer   *hookTracer
-	connected *atomic.Uint32
-
-	handler broker.Handler
+	topic     string

+	handler interface{}
 	done    chan struct{}
-
 	kopts   broker.Options
 	opts    broker.SubscribeOptions

+	connected *atomic.Uint32
+	sync.RWMutex
 	closed       bool
 	fatalOnError bool
-
-	sync.RWMutex
 }

 func (s *Subscriber) Client() *kgo.Client {
@@ -96,13 +87,46 @@ func (s *Subscriber) Unsubscribe(ctx context.Context) error {

 func (s *Subscriber) poll(ctx context.Context) {
 	maxInflight := DefaultSubscribeMaxInflight
-
 	if s.opts.Context != nil {
 		if n, ok := s.opts.Context.Value(subscribeMaxInflightKey{}).(int); n > 0 && ok {
 			maxInflight = n
 		}
 	}

+	go func() {
+		ac := kadm.NewClient(s.c)
+		ticker := time.NewTicker(DefaultStatsInterval)
+
+		for {
+			select {
+			case <-ctx.Done():
+				ticker.Stop()
+				return
+			case <-ticker.C:
+				dgls, err := ac.Lag(ctx, s.opts.Group)
+				if err != nil || !dgls.Ok() {
+					continue
+				}
+
+				dgl, ok := dgls[s.opts.Group]
+				if !ok {
+					continue
+				}
+				lmap, ok := dgl.Lag[s.topic]
+				if !ok {
+					continue
+				}
+
+				s.Lock()
+				for p, l := range lmap {
+					s.kopts.Meter.Counter(semconv.BrokerGroupLag, "topic", s.topic, "group", s.opts.Group, "partition", strconv.Itoa(int(p))).Set(uint64(l.Lag))
+				}
+				s.Unlock()
+
+			}
+		}
+	}()
+
 	for {
 		select {
 		case <-ctx.Done():
@@ -117,11 +141,7 @@ func (s *Subscriber) poll(ctx context.Context) {
 				return
 			}
 			fetches.EachError(func(t string, p int32, err error) {
-				if kgo.IsRetryableBrokerErr(err) {
-					s.kopts.Logger.Error(ctx, fmt.Sprintf("[kgo] fetch topic %s partition %d error", t, p), err)
-				} else {
 				s.kopts.Logger.Fatal(ctx, fmt.Sprintf("[kgo] fetch topic %s partition %d error", t, p), err)
-				}
 			})

 			fetches.EachPartition(func(p kgo.FetchTopicPartition) {
@@ -157,7 +177,7 @@ func (s *Subscriber) killConsumers(ctx context.Context, lost map[string][]int32)

 func (s *Subscriber) autocommit(_ *kgo.Client, _ *kmsg.OffsetCommitRequest, _ *kmsg.OffsetCommitResponse, err error) {
 	if err != nil {
-		//		s.connected.Store(0)
+		s.connected.Store(0)
 		if s.fatalOnError {
 			s.kopts.Logger.Fatal(context.TODO(), "kgo.AutoCommitCallback error", err)
 		}
@@ -208,17 +228,14 @@ func (s *Subscriber) assigned(_ context.Context, c *kgo.Client, assigned map[str
 }

 func (pc *consumer) consume() {
+	var err error
+
 	defer close(pc.done)
 	if pc.kopts.Logger.V(logger.DebugLevel) {
 		pc.kopts.Logger.Debug(pc.kopts.Context, fmt.Sprintf("starting, topic %s partition %d", pc.topic, pc.partition))
 		defer pc.kopts.Logger.Debug(pc.kopts.Context, fmt.Sprintf("killing, topic %s partition %d", pc.topic, pc.partition))
 	}

-	eh := pc.kopts.ErrorHandler
-	if pc.opts.ErrorHandler != nil {
-		eh = pc.opts.ErrorHandler
-	}
-
 	for {
 		select {
 		case <-pc.quit:
@@ -228,127 +245,50 @@ func (pc *consumer) consume() {
 				ctx, sp := pc.htracer.WithProcessSpan(record)
 				ts := time.Now()
 				pc.kopts.Meter.Counter(semconv.SubscribeMessageInflight, "endpoint", record.Topic, "topic", record.Topic).Inc()
-				p := eventPool.Get().(*event)
-				p.msg.Header = nil
-				p.msg.Body = nil
+				p := messagePool.Get().(*kgoMessage)
+
+				p.body = record.Value
 				p.topic = record.Topic
-				p.err = nil
 				p.ack = false
-				p.msg.Header = metadata.New(len(record.Headers))
+				p.hdr = metadata.New(len(record.Headers))
 				p.ctx = ctx
 				for _, hdr := range record.Headers {
-					p.msg.Header.Set(hdr.Key, string(hdr.Value))
+					p.hdr.Set(hdr.Key, string(hdr.Value))
 				}
-				p.msg.Header.Set("Micro-Offset", strconv.FormatInt(record.Offset, 10))
-				p.msg.Header.Set("Micro-Partition", strconv.FormatInt(int64(record.Partition), 10))
-				p.msg.Header.Set("Micro-Topic", record.Topic)
-				p.msg.Header.Set("Micro-Key", string(record.Key))
-				p.msg.Header.Set("Micro-Timestamp", strconv.FormatInt(record.Timestamp.Unix(), 10))
-				if pc.kopts.Codec.String() == "noop" {
-					p.msg.Body = record.Value
-				} else if pc.opts.BodyOnly {
-					p.msg.Body = record.Value
-				} else {
-					if sp != nil {
-						sp.AddEvent("codec unmarshal start")
-					}
-					err := pc.kopts.Codec.Unmarshal(record.Value, p.msg)
-					if sp != nil {
-						sp.AddEvent("codec unmarshal stop")
+
+				switch h := pc.handler.(type) {
+				case func(broker.Message) error:
+					err = h(p)
+				case func([]broker.Message) error:
+					err = h([]broker.Message{p})
 				}
+
+				pc.kopts.Meter.Counter(semconv.SubscribeMessageInflight, "endpoint", record.Topic, "topic", record.Topic).Dec()
 				if err != nil {
-						if sp != nil {
 					sp.SetStatus(tracer.SpanStatusError, err.Error())
-						}
 					pc.kopts.Meter.Counter(semconv.SubscribeMessageTotal, "endpoint", record.Topic, "topic", record.Topic, "status", "failure").Inc()
-						p.err = err
-						p.msg.Body = record.Value
-						if eh != nil {
-							_ = eh(p)
-							pc.kopts.Meter.Counter(semconv.SubscribeMessageInflight, "endpoint", record.Topic, "topic", record.Topic).Dec()
-							if p.ack {
-								pc.c.MarkCommitRecords(record)
-							} else {
-								eventPool.Put(p)
-								//								pc.connected.Store(0)
-								pc.kopts.Logger.Fatal(pc.kopts.Context, "[kgo] ErrLostMessage wtf?")
-								return
-							}
-							eventPool.Put(p)
-							te := time.Since(ts)
-							pc.kopts.Meter.Summary(semconv.SubscribeMessageLatencyMicroseconds, "endpoint", record.Topic, "topic", record.Topic).Update(te.Seconds())
-							pc.kopts.Meter.Histogram(semconv.SubscribeMessageDurationSeconds, "endpoint", record.Topic, "topic", record.Topic).Update(te.Seconds())
-							continue
-						} else {
-							pc.kopts.Logger.Error(pc.kopts.Context, "[kgo]: unmarshal error", err)
-						}
-						te := time.Since(ts)
-						pc.kopts.Meter.Counter(semconv.SubscribeMessageInflight, "endpoint", record.Topic, "topic", record.Topic).Dec()
-						pc.kopts.Meter.Summary(semconv.SubscribeMessageLatencyMicroseconds, "endpoint", record.Topic, "topic", record.Topic).Update(te.Seconds())
-						pc.kopts.Meter.Histogram(semconv.SubscribeMessageDurationSeconds, "endpoint", record.Topic, "topic", record.Topic).Update(te.Seconds())
-						eventPool.Put(p)
-						//						pc.connected.Store(0)
-						pc.kopts.Logger.Fatal(pc.kopts.Context, "[kgo] Unmarshal err not handled wtf?")
-						if sp != nil {
-							sp.Finish()
-						}
-						return
-					}
-				}
-				if sp != nil {
-					sp.AddEvent("handler start")
-				}
-				err := pc.handler(p)
-				if sp != nil {
-					sp.AddEvent("handler stop")
-				}
-				if err == nil {
-					pc.kopts.Meter.Counter(semconv.SubscribeMessageTotal, "endpoint", record.Topic, "topic", record.Topic, "status", "success").Inc()
-				} else {
-					if sp != nil {
-						sp.SetStatus(tracer.SpanStatusError, err.Error())
-					}
-					pc.kopts.Meter.Counter(semconv.SubscribeMessageTotal, "endpoint", record.Topic, "topic", record.Topic, "status", "failure").Inc()
-				}
-				pc.kopts.Meter.Counter(semconv.SubscribeMessageInflight, "endpoint", record.Topic, "topic", record.Topic).Dec()
-				if err == nil && pc.opts.AutoAck {
+				} else if pc.opts.AutoAck {
 					p.ack = true
-				} else if err != nil {
-					p.err = err
-					if eh != nil {
-						if sp != nil {
-							sp.AddEvent("error handler start")
-						}
-						_ = eh(p)
-						if sp != nil {
-							sp.AddEvent("error handler stop")
-						}
-					} else {
-						if pc.kopts.Logger.V(logger.ErrorLevel) {
-							pc.kopts.Logger.Error(pc.kopts.Context, "[kgo]: subscriber error", err)
-						}
-					}
 				}
+
 				te := time.Since(ts)
 				pc.kopts.Meter.Summary(semconv.SubscribeMessageLatencyMicroseconds, "endpoint", record.Topic, "topic", record.Topic).Update(te.Seconds())
 				pc.kopts.Meter.Histogram(semconv.SubscribeMessageDurationSeconds, "endpoint", record.Topic, "topic", record.Topic).Update(te.Seconds())
-				if p.ack {
-					eventPool.Put(p)
+
+				ack := p.ack
+				messagePool.Put(p)
+
+				if ack {
 					pc.c.MarkCommitRecords(record)
 				} else {
-					eventPool.Put(p)
-					//					pc.connected.Store(0)
-					pc.kopts.Logger.Fatal(pc.kopts.Context, "[kgo] ErrLostMessage wtf?")
-					if sp != nil {
-						sp.SetStatus(tracer.SpanStatusError, "ErrLostMessage")
 					sp.Finish()
-					}
+					pc.connected.Store(0)
+					pc.kopts.Logger.Fatal(pc.kopts.Context, "[kgo] message not commited")
 					return
 				}
-				if sp != nil {
+
 				sp.Finish()
 			}
 		}
 	}
 }
-}
--- a/tracer.go
+++ b/tracer.go
@@ -6,8 +6,8 @@ import (

 	"github.com/twmb/franz-go/pkg/kgo"
 	semconv "go.opentelemetry.io/otel/semconv/v1.18.0"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/tracer"
 )

 type hookTracer struct {
@@ -32,9 +32,6 @@ var (
 // the record's context, so it can be ended in the OnProduceRecordUnbuffered
 // hook.
 func (m *hookTracer) OnProduceRecordBuffered(r *kgo.Record) {
-	if !m.tracer.Enabled() {
-		return
-	}
 	// Set up span options.
 	attrs := []interface{}{
 		messagingSystem,
@@ -80,9 +77,6 @@ func (m *hookTracer) OnProduceRecordBuffered(r *kgo.Record) {
 // It sets attributes with values unset when producing and records any error
 // that occurred during the publish operation.
 func (m *hookTracer) OnProduceRecordUnbuffered(r *kgo.Record, err error) {
-	if !m.tracer.Enabled() {
-		return
-	}
 	if span, ok := tracer.SpanFromContext(r.Context); ok {
 		span.AddLabels(
 			semconv.MessagingKafkaDestinationPartition(int(r.Partition)),
@@ -102,9 +96,6 @@ func (m *hookTracer) OnProduceRecordUnbuffered(r *kgo.Record, err error) {
 // OnFetchRecordUnbuffered hook and can be used in downstream consumer
 // processing.
 func (m *hookTracer) OnFetchRecordBuffered(r *kgo.Record) {
-	if !m.tracer.Enabled() {
-		return
-	}
 	// Set up the span options.
 	attrs := []interface{}{
 		messagingSystem,
@@ -150,9 +141,6 @@ func (m *hookTracer) OnFetchRecordBuffered(r *kgo.Record) {
 // OnFetchRecordUnbuffered continues and ends the "receive" span for an
 // unbuffered record.
 func (m *hookTracer) OnFetchRecordUnbuffered(r *kgo.Record, _ bool) {
-	if !m.tracer.Enabled() {
-		return
-	}
 	span, _ := tracer.SpanFromContext(r.Context)
 	span.Finish()
 }
@@ -167,13 +155,6 @@ func (m *hookTracer) OnFetchRecordUnbuffered(r *kgo.Record, _ bool) {
 // not a record which has been created for producing, so call this at the start of each
 // iteration of your processing for the record.
 func (m *hookTracer) WithProcessSpan(r *kgo.Record) (context.Context, tracer.Span) {
-	if r.Context == nil {
-		r.Context = context.Background()
-	}
-
-	if !m.tracer.Enabled() {
-		return r.Context, nil
-	}
 	// Set up the span options.
 	attrs := []interface{}{
 		messagingSystem,
Author	SHA1	Message	Date
Vasiliy Tolstov	f73d9d7347	fixup group lag metric All checks were successful test / test (push) Successful in 3m49s Details Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>	2025-04-23 10:51:39 +03:00
Vasiliy Tolstov	53f72f1246	fixup panic All checks were successful test / test (push) Successful in 1m57s Details Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>	2025-03-12 20:34:30 +03:00
Vasiliy Tolstov	ac454693a6	update to v4 All checks were successful test / test (push) Successful in 3m29s Details Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>	2025-03-12 16:57:25 +03:00