156 lines
4.1 KiB
Go
156 lines
4.1 KiB
Go
// 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/uritemplates"
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)
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// IndicesExistsService checks if an index or indices exist or not.
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//
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// See https://www.elastic.co/guide/en/elasticsearch/reference/6.2/indices-exists.html
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// for details.
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type IndicesExistsService struct {
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client *Client
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pretty bool
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index []string
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ignoreUnavailable *bool
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allowNoIndices *bool
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expandWildcards string
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local *bool
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}
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// NewIndicesExistsService creates and initializes a new IndicesExistsService.
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func NewIndicesExistsService(client *Client) *IndicesExistsService {
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return &IndicesExistsService{
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client: client,
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index: make([]string, 0),
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}
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}
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// Index is a list of one or more indices to check.
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func (s *IndicesExistsService) Index(index []string) *IndicesExistsService {
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s.index = index
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return s
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}
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// AllowNoIndices indicates whether to ignore if a wildcard indices expression
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// resolves into no concrete indices. (This includes `_all` string or
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// when no indices have been specified).
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func (s *IndicesExistsService) AllowNoIndices(allowNoIndices bool) *IndicesExistsService {
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s.allowNoIndices = &allowNoIndices
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return s
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}
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// ExpandWildcards indicates whether to expand wildcard expression to
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// concrete indices that are open, closed or both.
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func (s *IndicesExistsService) ExpandWildcards(expandWildcards string) *IndicesExistsService {
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s.expandWildcards = expandWildcards
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return s
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}
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// Local, when set, returns local information and does not retrieve the state
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// from master node (default: false).
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func (s *IndicesExistsService) Local(local bool) *IndicesExistsService {
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s.local = &local
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return s
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}
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// IgnoreUnavailable indicates whether specified concrete indices should be
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// ignored when unavailable (missing or closed).
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func (s *IndicesExistsService) IgnoreUnavailable(ignoreUnavailable bool) *IndicesExistsService {
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s.ignoreUnavailable = &ignoreUnavailable
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return s
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}
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// Pretty indicates that the JSON response be indented and human readable.
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func (s *IndicesExistsService) Pretty(pretty bool) *IndicesExistsService {
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s.pretty = pretty
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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 *IndicesExistsService) buildURL() (string, url.Values, error) {
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// Build URL
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path, err := uritemplates.Expand("/{index}", map[string]string{
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"index": strings.Join(s.index, ","),
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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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if s.pretty {
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params.Set("pretty", "true")
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}
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if s.local != nil {
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params.Set("local", fmt.Sprintf("%v", *s.local))
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}
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if s.ignoreUnavailable != nil {
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params.Set("ignore_unavailable", fmt.Sprintf("%v", *s.ignoreUnavailable))
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}
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if s.allowNoIndices != nil {
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params.Set("allow_no_indices", fmt.Sprintf("%v", *s.allowNoIndices))
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}
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if s.expandWildcards != "" {
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params.Set("expand_wildcards", s.expandWildcards)
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}
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return path, params, nil
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}
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// Validate checks if the operation is valid.
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func (s *IndicesExistsService) Validate() error {
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var invalid []string
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if len(s.index) == 0 {
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invalid = append(invalid, "Index")
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}
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if len(invalid) > 0 {
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return fmt.Errorf("missing required fields: %v", invalid)
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}
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return nil
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}
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// Do executes the operation.
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func (s *IndicesExistsService) Do(ctx context.Context) (bool, error) {
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// Check pre-conditions
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if err := s.Validate(); err != nil {
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return false, err
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}
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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 false, 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: "HEAD",
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Path: path,
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Params: params,
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IgnoreErrors: []int{404},
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})
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if err != nil {
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return false, err
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}
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// Return operation response
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switch res.StatusCode {
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case http.StatusOK:
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return true, nil
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case http.StatusNotFound:
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return false, nil
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default:
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return false, fmt.Errorf("elastic: got HTTP code %d when it should have been either 200 or 404", res.StatusCode)
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}
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}
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