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81 lines
1.5 KiB
81 lines
1.5 KiB
package main
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import (
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"encoding/json"
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"github.com/Shopify/sarama"
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"log"
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"time"
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)
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// 需要发送的消息类型
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type Event struct {
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Name string `json:"name"`
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Type string `json:"type"`
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Source string `json:"source"`
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Target string `json:"target"`
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Time time.Time `json:"time"`
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}
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type EventEncoder Event
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func (e EventEncoder) Encode() ([]byte, error) {
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// 将 Event 类型数据做JSON编码
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j, err := json.Marshal(e)
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if err != nil {
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return nil, err
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}
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return j, nil
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}
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func (e EventEncoder) Length() int {
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// 编码之后的数据长度
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j, err := json.Marshal(e)
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if err != nil {
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return 0
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}
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return len(j)
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}
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func main() {
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// 一，获取同步生产者
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brokers := []string{"localhost:9092"}
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producer, err := sarama.NewSyncProducer(brokers, nil)
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if err != nil {
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log.Fatalln(err)
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}
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// 保证关闭生产者
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defer func() {
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if err := producer.Close(); err != nil {
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log.Fatalln(err)
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}
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}()
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// 模拟数据
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evt := Event{
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Name: "user",
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Type: "buy",
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Source: "42",
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Target: "10098",
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Time: time.Now(),
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}
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// 二，设置消息内容
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msg := &sarama.ProducerMessage{
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Topic: "event_topic",
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//Value: sarama.StringEncoder("Mashibing Go Kafka."),
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//Value: sarama.ByteEncoder
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Value: EventEncoder(evt),
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}
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// 三，发送消息
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// 返回：分区索引，偏移量，错误
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partition, offset, err := producer.SendMessage(msg)
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if err != nil {
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log.Printf("Send failed, err: %s\n", err)
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} else {
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log.Printf("Send Success, partition: %d, offset: %d\n", partition, offset)
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}
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}
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