01.基本使用

• 安装

go get github.com/Shopify/sarama
go mod tidy

1.1 生产者

package main

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

func main() {
	config := sarama.NewConfig()
	//设置
	//ack应答机制
	config.Producer.RequiredAcks = sarama.WaitForAll

	//发送分区
	config.Producer.Partitioner = sarama.NewRandomPartitioner

	//回复确认
	config.Producer.Return.Successes = true

	//构造一个消息
	msg := &sarama.ProducerMessage{}
	msg.Topic = "weatherStation"
	msg.Value = sarama.StringEncoder("test:weatherStation device")

	//连接kafka
	client, err := sarama.NewSyncProducer([]string{"192.168.31.204:9092"}, config)
	if err != nil {
		fmt.Println("producer closed,err:", err)
	}
	defer client.Close()

	//发送消息
	pid, offset, err := client.SendMessage(msg)
	if err != nil {
		fmt.Println("send msg failed,err:", err)
		return
	}
	fmt.Printf("pid:%v offset:%v \n ", pid, offset)

}

1.2 消费者

package main

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

var wg sync.WaitGroup

func main() {
	//创建新的消费者
	consumer, err := sarama.NewConsumer([]string{"192.168.31.204:9092"}, nil)
	if err != nil {
		fmt.Println("fail to start consumer", err)
	}
	//根据topic获取所有的分区列表
	partitionList, err := consumer.Partitions("weatherStation")
	if err != nil {
		fmt.Println("fail to get list of partition,err:", err)
	}
	fmt.Println(partitionList)
	//遍历所有的分区
	for p := range partitionList {
		//针对每一个分区创建一个对应分区的消费者
		pc, err := consumer.ConsumePartition("weatherStation", int32(p), sarama.OffsetNewest)
		if err != nil {
			fmt.Printf("failed to start consumer for partition %d,err:%v\n", p, err)
		}
		defer pc.AsyncClose()
		wg.Add(1)
		//异步从每个分区消费信息
		go func(sarama.PartitionConsumer) {
			for msg := range pc.Messages() {
				fmt.Printf("partition:%d Offse:%d Key:%v Value:%s \n",
					msg.Partition, msg.Offset, msg.Key, msg.Value)
			}
		}(pc)
	}
	wg.Wait()
}