mirror of
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216 lines
5.7 KiB
Go
216 lines
5.7 KiB
Go
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// Copyright 2012-present Oliver Eilhard. All rights reserved.
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// Use of this source code is governed by a MIT-license.
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// See http://olivere.mit-license.org/license.txt for details.
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package elastic
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import (
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"context"
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"fmt"
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"net/http"
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"net/url"
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"strings"
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"github.com/olivere/elastic/v7/uritemplates"
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)
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// CatCountService provides quick access to the document count of the entire cluster,
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// or individual indices.
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//
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// See https://www.elastic.co/guide/en/elasticsearch/reference/7.0/cat-count.html
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// for details.
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type CatCountService struct {
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client *Client
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pretty *bool // pretty format the returned JSON response
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human *bool // return human readable values for statistics
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errorTrace *bool // include the stack trace of returned errors
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filterPath []string // list of filters used to reduce the response
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headers http.Header // custom request-level HTTP headers
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index []string
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local *bool
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masterTimeout string
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columns []string
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sort []string // list of columns for sort order
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}
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// NewCatCountService creates a new CatCountService.
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func NewCatCountService(client *Client) *CatCountService {
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return &CatCountService{
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client: client,
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}
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}
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// Pretty tells Elasticsearch whether to return a formatted JSON response.
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func (s *CatCountService) Pretty(pretty bool) *CatCountService {
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s.pretty = &pretty
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return s
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}
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// Human specifies whether human readable values should be returned in
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// the JSON response, e.g. "7.5mb".
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func (s *CatCountService) Human(human bool) *CatCountService {
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s.human = &human
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return s
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}
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// ErrorTrace specifies whether to include the stack trace of returned errors.
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func (s *CatCountService) ErrorTrace(errorTrace bool) *CatCountService {
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s.errorTrace = &errorTrace
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return s
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}
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// FilterPath specifies a list of filters used to reduce the response.
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func (s *CatCountService) FilterPath(filterPath ...string) *CatCountService {
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s.filterPath = filterPath
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return s
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}
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// Header adds a header to the request.
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func (s *CatCountService) Header(name string, value string) *CatCountService {
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if s.headers == nil {
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s.headers = http.Header{}
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}
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s.headers.Add(name, value)
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return s
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}
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// Headers specifies the headers of the request.
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func (s *CatCountService) Headers(headers http.Header) *CatCountService {
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s.headers = headers
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return s
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}
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// Index specifies zero or more indices for which to return counts
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// (by default counts for all indices are returned).
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func (s *CatCountService) Index(index ...string) *CatCountService {
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s.index = index
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return s
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}
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// Local indicates to return local information, i.e. do not retrieve
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// the state from master node (default: false).
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func (s *CatCountService) Local(local bool) *CatCountService {
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s.local = &local
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return s
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}
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// MasterTimeout is the explicit operation timeout for connection to master node.
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func (s *CatCountService) MasterTimeout(masterTimeout string) *CatCountService {
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s.masterTimeout = masterTimeout
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return s
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}
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// Columns to return in the response.
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// To get a list of all possible columns to return, run the following command
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// in your terminal:
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//
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// Example:
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// curl 'http://localhost:9200/_cat/count?help'
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//
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// You can use Columns("*") to return all possible columns. That might take
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// a little longer than the default set of columns.
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func (s *CatCountService) Columns(columns ...string) *CatCountService {
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s.columns = columns
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return s
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}
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// Sort is a list of fields to sort by.
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func (s *CatCountService) Sort(fields ...string) *CatCountService {
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s.sort = fields
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return s
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}
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// buildURL builds the URL for the operation.
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func (s *CatCountService) buildURL() (string, url.Values, error) {
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// Build URL
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var (
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path string
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err error
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)
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if len(s.index) > 0 {
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path, err = uritemplates.Expand("/_cat/count/{index}", map[string]string{
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"index": strings.Join(s.index, ","),
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})
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} else {
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path = "/_cat/count"
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}
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if err != nil {
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return "", url.Values{}, err
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}
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// Add query string parameters
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params := url.Values{
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"format": []string{"json"}, // always returns as JSON
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}
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if v := s.pretty; v != nil {
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params.Set("pretty", fmt.Sprint(*v))
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}
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if v := s.human; v != nil {
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params.Set("human", fmt.Sprint(*v))
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}
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if v := s.errorTrace; v != nil {
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params.Set("error_trace", fmt.Sprint(*v))
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}
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if len(s.filterPath) > 0 {
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params.Set("filter_path", strings.Join(s.filterPath, ","))
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}
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if v := s.local; v != nil {
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params.Set("local", fmt.Sprint(*v))
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}
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if s.masterTimeout != "" {
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params.Set("master_timeout", s.masterTimeout)
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}
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if len(s.sort) > 0 {
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params.Set("s", strings.Join(s.sort, ","))
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}
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if len(s.columns) > 0 {
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params.Set("h", strings.Join(s.columns, ","))
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}
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return path, params, nil
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}
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// Do executes the operation.
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func (s *CatCountService) Do(ctx context.Context) (CatCountResponse, error) {
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// Get URL for request
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path, params, err := s.buildURL()
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if err != nil {
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return nil, err
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}
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// Get HTTP response
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res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
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Method: "GET",
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Path: path,
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Params: params,
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Headers: s.headers,
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})
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if err != nil {
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return nil, err
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}
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// Return operation response
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var ret CatCountResponse
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if err := s.client.decoder.Decode(res.Body, &ret); err != nil {
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return nil, err
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}
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return ret, nil
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}
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// -- Result of a get request.
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// CatCountResponse is the outcome of CatCountService.Do.
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type CatCountResponse []CatCountResponseRow
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// CatCountResponseRow specifies the data returned for one index
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// of a CatCountResponse. Notice that not all of these fields might
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// be filled; that depends on the number of columns chose in the
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// request (see CatCountService.Columns).
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type CatCountResponseRow struct {
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Epoch int64 `json:"epoch,string"` // e.g. 1527077996
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Timestamp string `json:"timestamp"` // e.g. "12:19:56"
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Count int `json:"count,string"` // number of documents
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}
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