1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
// Example channel-based Apache Kafka producer
package main
/**
* Copyright 2016 Confluent Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import (
"fmt"
"github.com/confluentinc/confluent-kafka-go/kafka"
"os"
)
func main() {
if len(os.Args) != 3 {
fmt.Fprintf(os.Stderr, "Usage: %s <broker> <topic>\n",
os.Args[0])
os.Exit(1)
}
broker := os.Args[1]
topic := os.Args[2]
p, err := kafka.NewProducer(&kafka.ConfigMap{"bootstrap.servers": broker})
if err != nil {
fmt.Printf("Failed to create producer: %s\n", err)
os.Exit(1)
}
fmt.Printf("Created Producer %v\n", p)
doneChan := make(chan bool)
go func() {
defer close(doneChan)
for e := range p.Events() {
switch ev := e.(type) {
case *kafka.Message:
m := ev
if m.TopicPartition.Error != nil {
fmt.Printf("Delivery failed: %v\n", m.TopicPartition.Error)
} else {
fmt.Printf("Delivered message to topic %s [%d] at offset %v\n",
*m.TopicPartition.Topic, m.TopicPartition.Partition, m.TopicPartition.Offset)
}
return
default:
fmt.Printf("Ignored event: %s\n", ev)
}
}
}()
value := "Hello Go!"
p.ProduceChannel() <- &kafka.Message{TopicPartition: kafka.TopicPartition{Topic: &topic, Partition: kafka.PartitionAny}, Value: []byte(value)}
// wait for delivery report goroutine to finish
_ = <-doneChan
p.Close()
}
|
