From a457621e444b4e0719c076a172a62d823616a122 Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Wed, 7 Feb 2024 19:14:47 +0100
Subject: wip
---
Makefile | 8 --
README.md | 11 ---
consumer.go | 101 --------------------
getting-started.properties | 2 -
go.mod | 5 -
go.sum | 213 ------------------------------------------
go/Makefile | 8 ++
go/README.md | 11 +++
go/consumer.go | 101 ++++++++++++++++++++
go/getting-started.properties | 2 +
go/go.mod | 5 +
go/go.sum | 213 ++++++++++++++++++++++++++++++++++++++++++
go/init.sql | 0
go/producer.go | 64 +++++++++++++
go/util/util.go | 41 ++++++++
init.sql | 0
producer.go | 64 -------------
util/util.go | 41 --------
18 files changed, 445 insertions(+), 445 deletions(-)
delete mode 100644 Makefile
delete mode 100644 README.md
delete mode 100644 consumer.go
delete mode 100644 getting-started.properties
delete mode 100644 go.mod
delete mode 100644 go.sum
create mode 100644 go/Makefile
create mode 100644 go/README.md
create mode 100644 go/consumer.go
create mode 100644 go/getting-started.properties
create mode 100644 go/go.mod
create mode 100644 go/go.sum
create mode 100644 go/init.sql
create mode 100644 go/producer.go
create mode 100644 go/util/util.go
delete mode 100644 init.sql
delete mode 100644 producer.go
delete mode 100644 util/util.go
diff --git a/Makefile b/Makefile
deleted file mode 100644
index 093da5e..0000000
--- a/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-all: out/producer out/consumer
-
-out/producer out/consumer: $(wildcard *.go)
- @echo $@
- @go build -o $@ $(patsubst out/%,%.go,$@)
-
-clean:
- rm -f out/producer out/consumer
diff --git a/README.md b/README.md
deleted file mode 100644
index 0cf77f8..0000000
--- a/README.md
+++ /dev/null
@@ -1,11 +0,0 @@
-* Docker compose: https://github.com/confluentinc/cp-all-in-one/blob/7.5.3-post/cp-all-in-one-kraft/docker-compose.yml
-* Demo: https://developer.confluent.io/get-started/go
-
-# Start services
-
- . .settings.sh
- docker-compose up -d
-
-Available services:
-
- * Control center: http://localhost:9021
diff --git a/consumer.go b/consumer.go
deleted file mode 100644
index 4047c4e..0000000
--- a/consumer.go
+++ /dev/null
@@ -1,101 +0,0 @@
-package main
-
-import (
- "fmt"
- "github.com/confluentinc/confluent-kafka-go/v2/kafka"
- "kafka-sandbox/util"
- "log"
- "os"
- "os/signal"
- "syscall"
-)
-
-func main() {
- if len(os.Args) != 2 {
- fmt.Fprintf(os.Stderr, "Usage: %s <config-file-path>\n",
- os.Args[0])
- os.Exit(1)
- }
-
- configFile := os.Args[1]
- conf := util.ReadConfig(configFile)
- conf["group.id"] = "kafka-go-getting-started"
- conf["auto.offset.reset"] = "earliest"
-
- c, err := kafka.NewConsumer(&conf)
- if err != nil {
- fmt.Printf("Failed to create consumer: %s", err)
- os.Exit(1)
- }
-
- topic := "purchases"
- err = c.SubscribeTopics([]string{topic}, nil)
- // Set up a channel for handling Ctrl-C, etc
- sigchan := make(chan os.Signal, 1)
- signal.Notify(sigchan, syscall.SIGINT, syscall.SIGTERM)
-
- // Process messages
- run := true
- for run {
- select {
- case sig := <-sigchan:
- fmt.Printf("Caught signal %v: terminating\n", sig)
- run = false
- default:
- ev := c.Poll(100)
- if ev == nil {
- continue
- }
-
- switch e := ev.(type) {
- case *kafka.Message:
- if e.TopicPartition.Error != nil {
- onTopicPartitionError(e)
- } else {
- onMessage(e)
- }
- case kafka.OffsetsCommitted:
- log.Println("Offsets committed")
- for i, offset := range e.Offsets {
- log.Printf(" %d: %s\n", i, offset.String())
- }
- case kafka.Error:
- log.Fatalln(e)
- default:
- log.Printf("Unhandled message type: %s\n", e.String())
- }
- }
- }
-
- c.Close()
-}
-
-func onMessage(ev *kafka.Message) {
- fmt.Printf("-------- %s\n", ev.TopicPartition.String())
- fmt.Printf("%s %s: %s\n",
- ev.TimestampType.String(),
- ev.Timestamp.String(),
- string(ev.Key))
- for _, header := range ev.Headers {
- fmt.Printf("%s: %s\n", header.Key, string(header.Value))
- }
- fmt.Printf("%s\n", string(ev.Value))
-}
-
-func onTopicPartitionError(e *kafka.Message) {
- fmt.Printf("Partition error: %s\n", e.TopicPartition.String())
-}
-
-func showAssignment(err error, c *kafka.Consumer) error {
- partitions, err := c.Assignment()
- if err != nil {
- return err
- }
-
- fmt.Printf("Consuming %d partitions: \n", len(partitions))
- for i, partition := range partitions {
- fmt.Printf(" #%d: %s\n", i+1, partition.String())
- }
-
- return nil
-}
diff --git a/getting-started.properties b/getting-started.properties
deleted file mode 100644
index 467d1c4..0000000
--- a/getting-started.properties
+++ /dev/null
@@ -1,2 +0,0 @@
-bootstrap.servers=localhost
-
diff --git a/go.mod b/go.mod
deleted file mode 100644
index 8cedea6..0000000
--- a/go.mod
+++ /dev/null
@@ -1,5 +0,0 @@
-module kafka-sandbox
-
-go 1.22
-
-require github.com/confluentinc/confluent-kafka-go/v2 v2.3.0
diff --git a/go.sum b/go.sum
deleted file mode 100644
index a9c2f29..0000000
--- a/go.sum
+++ /dev/null
@@ -1,213 +0,0 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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diff --git a/go/Makefile b/go/Makefile
new file mode 100644
index 0000000..093da5e
--- /dev/null
+++ b/go/Makefile
@@ -0,0 +1,8 @@
+all: out/producer out/consumer
+
+out/producer out/consumer: $(wildcard *.go)
+ @echo $@
+ @go build -o $@ $(patsubst out/%,%.go,$@)
+
+clean:
+ rm -f out/producer out/consumer
diff --git a/go/README.md b/go/README.md
new file mode 100644
index 0000000..0cf77f8
--- /dev/null
+++ b/go/README.md
@@ -0,0 +1,11 @@
+* Docker compose: https://github.com/confluentinc/cp-all-in-one/blob/7.5.3-post/cp-all-in-one-kraft/docker-compose.yml
+* Demo: https://developer.confluent.io/get-started/go
+
+# Start services
+
+ . .settings.sh
+ docker-compose up -d
+
+Available services:
+
+ * Control center: http://localhost:9021
diff --git a/go/consumer.go b/go/consumer.go
new file mode 100644
index 0000000..4047c4e
--- /dev/null
+++ b/go/consumer.go
@@ -0,0 +1,101 @@
+package main
+
+import (
+ "fmt"
+ "github.com/confluentinc/confluent-kafka-go/v2/kafka"
+ "kafka-sandbox/util"
+ "log"
+ "os"
+ "os/signal"
+ "syscall"
+)
+
+func main() {
+ if len(os.Args) != 2 {
+ fmt.Fprintf(os.Stderr, "Usage: %s <config-file-path>\n",
+ os.Args[0])
+ os.Exit(1)
+ }
+
+ configFile := os.Args[1]
+ conf := util.ReadConfig(configFile)
+ conf["group.id"] = "kafka-go-getting-started"
+ conf["auto.offset.reset"] = "earliest"
+
+ c, err := kafka.NewConsumer(&conf)
+ if err != nil {
+ fmt.Printf("Failed to create consumer: %s", err)
+ os.Exit(1)
+ }
+
+ topic := "purchases"
+ err = c.SubscribeTopics([]string{topic}, nil)
+ // Set up a channel for handling Ctrl-C, etc
+ sigchan := make(chan os.Signal, 1)
+ signal.Notify(sigchan, syscall.SIGINT, syscall.SIGTERM)
+
+ // Process messages
+ run := true
+ for run {
+ select {
+ case sig := <-sigchan:
+ fmt.Printf("Caught signal %v: terminating\n", sig)
+ run = false
+ default:
+ ev := c.Poll(100)
+ if ev == nil {
+ continue
+ }
+
+ switch e := ev.(type) {
+ case *kafka.Message:
+ if e.TopicPartition.Error != nil {
+ onTopicPartitionError(e)
+ } else {
+ onMessage(e)
+ }
+ case kafka.OffsetsCommitted:
+ log.Println("Offsets committed")
+ for i, offset := range e.Offsets {
+ log.Printf(" %d: %s\n", i, offset.String())
+ }
+ case kafka.Error:
+ log.Fatalln(e)
+ default:
+ log.Printf("Unhandled message type: %s\n", e.String())
+ }
+ }
+ }
+
+ c.Close()
+}
+
+func onMessage(ev *kafka.Message) {
+ fmt.Printf("-------- %s\n", ev.TopicPartition.String())
+ fmt.Printf("%s %s: %s\n",
+ ev.TimestampType.String(),
+ ev.Timestamp.String(),
+ string(ev.Key))
+ for _, header := range ev.Headers {
+ fmt.Printf("%s: %s\n", header.Key, string(header.Value))
+ }
+ fmt.Printf("%s\n", string(ev.Value))
+}
+
+func onTopicPartitionError(e *kafka.Message) {
+ fmt.Printf("Partition error: %s\n", e.TopicPartition.String())
+}
+
+func showAssignment(err error, c *kafka.Consumer) error {
+ partitions, err := c.Assignment()
+ if err != nil {
+ return err
+ }
+
+ fmt.Printf("Consuming %d partitions: \n", len(partitions))
+ for i, partition := range partitions {
+ fmt.Printf(" #%d: %s\n", i+1, partition.String())
+ }
+
+ return nil
+}
diff --git a/go/getting-started.properties b/go/getting-started.properties
new file mode 100644
index 0000000..467d1c4
--- /dev/null
+++ b/go/getting-started.properties
@@ -0,0 +1,2 @@
+bootstrap.servers=localhost
+
diff --git a/go/go.mod b/go/go.mod
new file mode 100644
index 0000000..8cedea6
--- /dev/null
+++ b/go/go.mod
@@ -0,0 +1,5 @@
+module kafka-sandbox
+
+go 1.22
+
+require github.com/confluentinc/confluent-kafka-go/v2 v2.3.0
diff --git a/go/go.sum b/go/go.sum
new file mode 100644
index 0000000..a9c2f29
--- /dev/null
+++ b/go/go.sum
@@ -0,0 +1,213 @@
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diff --git a/go/init.sql b/go/init.sql
new file mode 100644
index 0000000..e69de29
diff --git a/go/producer.go b/go/producer.go
new file mode 100644
index 0000000..2eb33d1
--- /dev/null
+++ b/go/producer.go
@@ -0,0 +1,64 @@
+package main
+
+import (
+ "fmt"
+ "github.com/confluentinc/confluent-kafka-go/v2/kafka"
+ "kafka-sandbox/util"
+ "log"
+ "math/rand"
+ "os"
+)
+
+func main() {
+ if len(os.Args) != 2 {
+ fmt.Fprintf(os.Stderr, "Usage: %s <config-file-path>\n",
+ os.Args[0])
+ os.Exit(1)
+ }
+
+ configFile := os.Args[1]
+ conf := util.ReadConfig(configFile)
+
+ topic := "purchases"
+ p, err := kafka.NewProducer(&conf)
+ if err != nil {
+ fmt.Printf("Failed to create producer: %s", err)
+ os.Exit(1)
+ }
+
+ // Go-routine to handle message delivery reports and
+ // possibly other event types (errors, stats, etc)
+ go func() {
+ for e := range p.Events() {
+ switch ev := e.(type) {
+ case *kafka.Message:
+ if ev.TopicPartition.Error != nil {
+ fmt.Printf("Failed to deliver message: %v\n", ev.TopicPartition)
+ } else {
+ fmt.Printf("Produced event to topic %s: key = %-10s value = %s\n",
+ *ev.TopicPartition.Topic, string(ev.Key), string(ev.Value))
+ }
+ }
+ }
+ }()
+
+ users := [...]string{"eabara", "jsmith", "sgarcia", "jbernard", "htanaka", "awalther"}
+ items := [...]string{"book", "alarm clock", "t-shirts", "gift card", "batteries"}
+
+ for n := 0; n < 10; n++ {
+ key := users[rand.Intn(len(users))]
+ data := items[rand.Intn(len(items))]
+ err := p.Produce(&kafka.Message{
+ TopicPartition: kafka.TopicPartition{Topic: &topic, Partition: kafka.PartitionAny},
+ Key: []byte(key),
+ Value: []byte(data),
+ }, nil)
+ if err != nil {
+ log.Fatalln(err)
+ }
+ }
+
+ // Wait for all messages to be delivered
+ p.Flush(15 * 1000)
+ p.Close()
+}
diff --git a/go/util/util.go b/go/util/util.go
new file mode 100644
index 0000000..d56f662
--- /dev/null
+++ b/go/util/util.go
@@ -0,0 +1,41 @@
+package util
+
+import (
+ "bufio"
+ "fmt"
+ "os"
+ "strings"
+
+ "github.com/confluentinc/confluent-kafka-go/v2/kafka"
+)
+
+func ReadConfig(configFile string) kafka.ConfigMap {
+ m := make(map[string]kafka.ConfigValue)
+
+ file, err := os.Open(configFile)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "Failed to open file: %s", err)
+ os.Exit(1)
+ }
+ defer file.Close()
+
+ scanner := bufio.NewScanner(file)
+ for scanner.Scan() {
+ line := strings.TrimSpace(scanner.Text())
+ if !strings.HasPrefix(line, "#") && len(line) != 0 {
+ before, after, found := strings.Cut(line, "=")
+ if found {
+ parameter := strings.TrimSpace(before)
+ value := strings.TrimSpace(after)
+ m[parameter] = value
+ }
+ }
+ }
+
+ if err := scanner.Err(); err != nil {
+ fmt.Printf("Failed to read file: %s", err)
+ os.Exit(1)
+ }
+
+ return m
+}
diff --git a/init.sql b/init.sql
deleted file mode 100644
index e69de29..0000000
diff --git a/producer.go b/producer.go
deleted file mode 100644
index 2eb33d1..0000000
--- a/producer.go
+++ /dev/null
@@ -1,64 +0,0 @@
-package main
-
-import (
- "fmt"
- "github.com/confluentinc/confluent-kafka-go/v2/kafka"
- "kafka-sandbox/util"
- "log"
- "math/rand"
- "os"
-)
-
-func main() {
- if len(os.Args) != 2 {
- fmt.Fprintf(os.Stderr, "Usage: %s <config-file-path>\n",
- os.Args[0])
- os.Exit(1)
- }
-
- configFile := os.Args[1]
- conf := util.ReadConfig(configFile)
-
- topic := "purchases"
- p, err := kafka.NewProducer(&conf)
- if err != nil {
- fmt.Printf("Failed to create producer: %s", err)
- os.Exit(1)
- }
-
- // Go-routine to handle message delivery reports and
- // possibly other event types (errors, stats, etc)
- go func() {
- for e := range p.Events() {
- switch ev := e.(type) {
- case *kafka.Message:
- if ev.TopicPartition.Error != nil {
- fmt.Printf("Failed to deliver message: %v\n", ev.TopicPartition)
- } else {
- fmt.Printf("Produced event to topic %s: key = %-10s value = %s\n",
- *ev.TopicPartition.Topic, string(ev.Key), string(ev.Value))
- }
- }
- }
- }()
-
- users := [...]string{"eabara", "jsmith", "sgarcia", "jbernard", "htanaka", "awalther"}
- items := [...]string{"book", "alarm clock", "t-shirts", "gift card", "batteries"}
-
- for n := 0; n < 10; n++ {
- key := users[rand.Intn(len(users))]
- data := items[rand.Intn(len(items))]
- err := p.Produce(&kafka.Message{
- TopicPartition: kafka.TopicPartition{Topic: &topic, Partition: kafka.PartitionAny},
- Key: []byte(key),
- Value: []byte(data),
- }, nil)
- if err != nil {
- log.Fatalln(err)
- }
- }
-
- // Wait for all messages to be delivered
- p.Flush(15 * 1000)
- p.Close()
-}
diff --git a/util/util.go b/util/util.go
deleted file mode 100644
index d56f662..0000000
--- a/util/util.go
+++ /dev/null
@@ -1,41 +0,0 @@
-package util
-
-import (
- "bufio"
- "fmt"
- "os"
- "strings"
-
- "github.com/confluentinc/confluent-kafka-go/v2/kafka"
-)
-
-func ReadConfig(configFile string) kafka.ConfigMap {
- m := make(map[string]kafka.ConfigValue)
-
- file, err := os.Open(configFile)
- if err != nil {
- fmt.Fprintf(os.Stderr, "Failed to open file: %s", err)
- os.Exit(1)
- }
- defer file.Close()
-
- scanner := bufio.NewScanner(file)
- for scanner.Scan() {
- line := strings.TrimSpace(scanner.Text())
- if !strings.HasPrefix(line, "#") && len(line) != 0 {
- before, after, found := strings.Cut(line, "=")
- if found {
- parameter := strings.TrimSpace(before)
- value := strings.TrimSpace(after)
- m[parameter] = value
- }
- }
- }
-
- if err := scanner.Err(); err != nil {
- fmt.Printf("Failed to read file: %s", err)
- os.Exit(1)
- }
-
- return m
-}
--
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