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// This is a simple example demonstrating how to produce a message to
// Confluent Cloud then read it back again.
//
// https://www.confluent.io/confluent-cloud/
//
// Auto-creation of topics is disabled in Confluent Cloud. You will need to
// use the ccloud cli to create the go-test-topic topic before running this
// example.
//
// $ ccloud topic create go-test-topic
//
// The <ccloud bootstrap servers>, <ccloud key> and <ccloud secret> parameters
// are available via the Confluent Cloud web interface. For more information,
// refer to the quick-start:
//
// https://docs.confluent.io/current/cloud-quickstart.html
package main
/**
* Copyright 2018 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 (
"time"
"fmt"
"github.com/confluentinc/confluent-kafka-go/kafka"
)
func main() {
p, err := kafka.NewProducer(&kafka.ConfigMap{
"bootstrap.servers": "<ccloud bootstrap servers>",
"broker.version.fallback": "0.10.0.0",
"api.version.fallback.ms": 0,
"sasl.mechanisms": "PLAIN",
"security.protocol": "SASL_SSL",
"sasl.username": "<ccloud key>",
"sasl.password": "<ccloud secret>",})
if err != nil {
panic(fmt.Sprintf("Failed to create producer: %s", err))
}
value := "golang test value"
topic := "go-test-topic"
p.Produce(&kafka.Message{
TopicPartition: kafka.TopicPartition{Topic: &topic, Partition: kafka.PartitionAny},
Value: []byte(value),
}, nil)
// Wait for delivery report
e := <-p.Events()
m := e.(*kafka.Message)
if m.TopicPartition.Error != nil {
fmt.Printf("failed to deliver message: %v\n", m.TopicPartition)
} else {
fmt.Printf("delivered to topic %s [%d] at offset %v\n",
*m.TopicPartition.Topic, m.TopicPartition.Partition, m.TopicPartition.Offset)
}
p.Close()
c, err := kafka.NewConsumer(&kafka.ConfigMap{
"bootstrap.servers": "<ccloud bootstrap servers>",
"broker.version.fallback": "0.10.0.0",
"api.version.fallback.ms": 0,
"sasl.mechanisms": "PLAIN",
"security.protocol": "SASL_SSL",
"sasl.username": "<ccloud key>",
"sasl.password": "<ccloud secret>",
"session.timeout.ms": 6000,
"group.id": "my-group",
"default.topic.config": kafka.ConfigMap{"auto.offset.reset": "earliest"},})
if err != nil {
panic(fmt.Sprintf("Failed to create consumer: %s", err))
}
topics := []string { topic }
c.SubscribeTopics(topics, nil)
for {
msg, err := c.ReadMessage(100 * time.Millisecond)
if err == nil {
fmt.Printf("consumed: %s: %s\n", msg.TopicPartition, string(msg.Value))
}
}
c.Close()
}
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