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‎csv2es/.gitignore

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csv2es

‎csv2es/LICENSE

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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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"License" shall mean the terms and conditions for use, reproduction,
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and distribution as defined by Sections 1 through 9 of this document.
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limitations under the License.

‎csv2es/cmd/import.go

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// Copyright © 2018 NAME HERE <EMAIL ADDRESS>
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmd
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import (
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"context"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"strings"
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"github.com/ibbd-dev/go-csv"
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"github.com/spf13/cobra"
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"gopkg.in/olivere/elastic.v5"
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)
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// importCmd represents the import command
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var importCmd = &cobra.Command{
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Use: "import",
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Short: "import data from csv to es",
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Long: `import data from csv to es
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`,
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Example: `
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csv2es import --host=locahost --port=9200 --mapping=mapping_filename.json --index=test --type=test --csv=source.csv
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`,
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Run: func(cmd *cobra.Command, args []string) {
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// 创建输出文件
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in, err := os.Open(cParams.CsvFilename)
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if err != nil {
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panic(err)
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}
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defer in.Close()
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reader := goCsv.NewMapReader(in)
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fieldnames, err := reader.GetFieldnames()
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if err != nil {
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panic(err)
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}
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fmt.Printf("fieldnames: %s\n", strings.Join(fieldnames, ", "))
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// es
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conn, err := getESConnect()
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ctx := context.Background()
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exists, err := conn.IndexExists(cParams.IndexName).Do(ctx)
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if err != nil {
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panic(fmt.Errorf("check index exists error: %v", err.Error()))
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}
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if exists {
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if cParams.DeleteIndex {
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// 删除同名索引
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if _, err = conn.DeleteIndex(cParams.IndexName).Do(ctx); err != nil {
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panic(fmt.Errorf("delete index error: %s", cParams.IndexName))
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}
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}
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} else {
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// 创建索引
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conn.CreateIndex(cParams.IndexName).Do(ctx)
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if len(cParams.Mapping) > 0 {
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bytes, err := ioutil.ReadFile(cParams.Mapping)
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if err != nil {
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fmt.Println("Read mapping file: ", err.Error())
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panic(err)
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}
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var mapping = make(map[string]interface{})
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if err := json.Unmarshal(bytes, &mapping); err != nil {
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fmt.Println("Json Unmarshal: ", err.Error())
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panic(err)
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}
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conn.PutMapping().Index(cParams.IndexName).BodyJson(mapping).Do(ctx)
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}
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}
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bulk := conn.Bulk()
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for {
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row, err := reader.Read()
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if err == io.EOF {
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fmt.Printf("the file is over")
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break
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}
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if err != nil {
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panic(err)
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}
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fmt.Printf("Row 1: %+v\n", row)
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req := elastic.NewBulkIndexRequest().Index(cParams.IndexName).Type(cParams.DocType).Doc(row)
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bulk.Add(req)
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}
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// 执行导入
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bulkResponse, err := bulk.Do(ctx)
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if err != nil {
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panic(fmt.Errorf("index %v 批量导入数据出错: %v", cParams.IndexName, err.Error()))
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}
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// 统计写入状态
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var count int
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indexed := bulkResponse.Indexed()
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for i, res := range indexed {
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if res.Error != nil {
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fmt.Printf("ERROR: %d, %+v\n", i, res.Error)
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count++
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}
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}
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fmt.Printf("向es写入的数据量：%d，异常：%d", len(indexed), count)
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},
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}
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func init() {
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rootCmd.AddCommand(importCmd)
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// Here you will define your flags and configuration settings.
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// Cobra supports Persistent Flags which will work for this command
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// and all subcommands, e.g.:
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// importCmd.PersistentFlags().String("foo", "", "A help for foo")
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importCmd.PersistentFlags().BoolVar(&cParams.DeleteIndex, "delete-index", false, "delete the same index before")
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importCmd.PersistentFlags().StringVar(&cParams.Mapping, "mapping", "", "the mapping file name, json format")
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// Cobra supports local flags which will only run when this command
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// is called directly, e.g.:
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// importCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
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}

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