120 lines
2.5 KiB
Go
120 lines
2.5 KiB
Go
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package main
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"github.com/elastic/go-elasticsearch/v7"
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"time"
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)
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//ES insert data demo
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var cli *elasticsearch.Client
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type Student struct {
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Name string `json:"name"`
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Age int `json:"age"`
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Married bool `json:"married"`
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}
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func main() {
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cli, _ = initEsConnect()
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//创建索引
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err := createIndices("student", time.Second)
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if err != nil {
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return
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}
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doc := Student{
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Name: "wangao",
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Age: 18,
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Married: false,
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}
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err = InsertDocument("student", doc)
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if err != nil {
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fmt.Println(err)
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return
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}
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}
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func initEsConnect() (cli *elasticsearch.Client, err error) {
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//1.初始化一个elasticsearch客户端进行链接
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cfg := elasticsearch.Config{
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Addresses: []string{"https://es-o3log3sa.public.tencentelasticsearch.com:9200"},
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Username: "elastic",
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Password: "wangao1996!",
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}
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cli, err = elasticsearch.NewClient(cfg)
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if err != nil {
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panic(err)
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}
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fmt.Println("connect to es success!") //链接成功
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return cli, nil
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}
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func createIndices(indices string, timeout time.Duration) error {
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ctx, cancel := context.WithTimeout(context.Background(), timeout)
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defer cancel()
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select {
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case <-ctx.Done():
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err := ctx.Err()
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fmt.Println("create index timeout ")
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return err
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default:
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withContext := cli.Indices.Create.WithContext(ctx)
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resp, err := cli.Indices.Create(indices, withContext)
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if err != nil {
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fmt.Printf("create index failed, err:%v\n", err)
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return err
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}
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if resp.StatusCode != 200 {
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fmt.Printf("create index error: %s\n", resp.Status())
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return err
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}
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fmt.Println("create index success")
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}
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return nil
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}
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func InsertDocument(indexName string, doc Student) error {
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// 将结构体转换为 JSON 的字节切片
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marshal, err := json.Marshal(doc)
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if err != nil {
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fmt.Println(err)
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return err
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}
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//// 反射获取id
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//idFiled := reflect.ValueOf(doc).FieldByName("Id")
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//if !idFiled.IsValid() {
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// return fmt.Errorf("invalid id field")
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//}
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//kind := idFiled.Kind()
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//if kind != reflect.String {
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// return fmt.Errorf("invalid id is not string type")
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//}
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response, err := cli.Index(
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indexName,
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// 输入流
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bytes.NewReader(marshal),
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// 上下文
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cli.Index.WithContext(context.Background()),
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// 自定义Id
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//cli.Index.WithDocumentID(idFiled.String()),
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)
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if err != nil {
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return fmt.Errorf("insert document error: %s", err)
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}
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if response.StatusCode != 201 {
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return fmt.Errorf("insert document error: %s", response.Status())
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}
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fmt.Printf("insert document: %#v\n", doc)
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return nil
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}
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