golang操作kafka如何处理错误

在Golang中操作Kafka时，处理错误的关键是检查每个操作返回的错误值。以下是一些常见的Kafka操作及其错误处理方法：

1. 创建生产者：

package main

import (
	"fmt"
	"github.com/Shopify/sarama"
)

func main() {
	config := sarama.NewConfig()
	config.Producer.RequiredAcks = sarama.WaitForAll
	config.Producer.Retry.Max = 5
	config.Producer.Return.Successes = true

	producer, err := sarama.NewSyncProducer([]string{"localhost:9092"}, config)
	if err != nil {
		fmt.Printf("Error creating producer: %v\n", err)
		return
	}
	defer func() {
		if err := producer.Close(); err != nil {
			fmt.Printf("Error closing producer: %v\n", err)
		}
	}()

	// 生产者创建成功，可以进行后续操作
}

2. 发送消息：

msg := &sarama.ProducerMessage{
	Topic: "test_topic",
	Value: sarama.StringEncoder("Hello, Kafka!"),
}

partition, offset, err := producer.SendMessage(msg)
if err != nil {
	fmt.Printf("Error sending message: %v\n", err)
	return
}
fmt.Printf("Message sent to partition %d at offset %d\n", partition, offset)

3. 消费消息：

consumer, err := sarama.NewConsumer([]string{"localhost:9092"}, nil)
if err != nil {
	fmt.Printf("Error creating consumer: %v\n", err)
	return
}
defer func() {
	if err := consumer.Close(); err != nil {
		fmt.Printf("Error closing consumer: %v\n", err)
	}
}()

partitionConsumer, err := consumer.ConsumePartition("test_topic", 0, sarama.OffsetNewest)
if err != nil {
	fmt.Printf("Error consuming partition: %v\n", err)
	return
}
defer func() {
	if err := partitionConsumer.Close(); err != nil {
		fmt.Printf("Error closing partition consumer: %v\n", err)
	}
}()

for msg := range partitionConsumer.Messages() {
	fmt.Printf("Received message: %s (partition %d, offset %d)\n", string(msg.Value), msg.Partition, msg.Offset)
}

在上述示例中，我们使用了sarama库来操作Kafka。在每个操作中，我们都检查了返回的错误值，并在发生错误时进行了相应的处理。这样可以确保我们在遇到问题时能够及时发现并采取相应的措施。