目录
一.使用库说明
Golang中连接kafka可以使用第三方库:github.com/Shopify/sarama
二.Kafka Producer发送消息
package main import ( "fmt" "github.com/Shopify/sarama" ) func main() { config := sarama.NewConfig() config.Producer.RequiredAcks = sarama.WaitForAll // 发送完数据需要leader和follower都确认 config.Producer.Partitioner = sarama.NewRandomPartitioner //写到随机分区中,我们默认设置32个分区 config.Producer.Return.Successes = true // 成功交付的消息将在success channel返回 // 构造一个消息 msg := &sarama.ProducerMessage{} msg.Topic = "task" msg.Value = sarama.StringEncoder("producer kafka messages...") // 连接kafka client, err := sarama.NewSyncProducer([]string{"192.20.216.8:9092"}, config) if err != nil { fmt.Println("Producer closed, err:", err) return } 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) }
三.Kafka Consumer消费消息
package main import ( "fmt" "github.com/Shopify/sarama" "sync" ) func main() { var wg sync.WaitGroup consumer, err := sarama.NewConsumer([]string{"192.20.216.8:9092"}, nil) if err != nil { fmt.Println("Failed to start consumer: %s", err) return } partitionList, err := consumer.Partitions("task-status-data") // 通过topic获取到所有的分区 if err != nil { fmt.Println("Failed to get the list of partition: ", err) return } fmt.Println(partitionList) for partition := range partitionList{ // 遍历所有的分区 pc, err := consumer.ConsumePartition("task", int32(partition), sarama.OffsetNewest) // 针对每个分区创建一个分区消费者 if err != nil { fmt.Println("Failed to start consumer for partition %d: %s\n", partition, err) } wg.Add(1) go func(sarama.PartitionConsumer) { // 为每个分区开一个go协程取值 for msg := range pc.Messages() { // 阻塞直到有值发送过来,然后再继续等待 fmt.Printf("Partition:%d, Offset:%d, key:%s, value:%s\n", msg.Partition, msg.Offset, string(msg.Key), string(msg.Value)) } defer pc.AsyncClose() wg.Done() }(pc) } wg.Wait() consumer.Close() }
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