153 lines
3.1 KiB
Go
153 lines
3.1 KiB
Go
// Copyright 2012-2015 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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"encoding/json"
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"fmt"
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"net/url"
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"strings"
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"gopkg.in/olivere/elastic.v2/uritemplates"
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)
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// CountService is a convenient service for determining the
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// number of documents in an index. Use SearchService with
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// a SearchType of count for counting with queries etc.
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type CountService struct {
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client *Client
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indices []string
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types []string
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query Query
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pretty bool
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}
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// CountResult is the result returned from using the Count API
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// (http://www.elasticsearch.org/guide/reference/api/count/)
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type CountResult struct {
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Count int64 `json:"count"`
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Shards shardsInfo `json:"_shards,omitempty"`
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}
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func NewCountService(client *Client) *CountService {
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builder := &CountService{
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client: client,
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}
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return builder
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}
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func (s *CountService) Index(index string) *CountService {
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if s.indices == nil {
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s.indices = make([]string, 0)
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}
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s.indices = append(s.indices, index)
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return s
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}
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func (s *CountService) Indices(indices ...string) *CountService {
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if s.indices == nil {
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s.indices = make([]string, 0)
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}
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s.indices = append(s.indices, indices...)
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return s
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}
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func (s *CountService) Type(typ string) *CountService {
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if s.types == nil {
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s.types = make([]string, 0)
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}
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s.types = append(s.types, typ)
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return s
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}
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func (s *CountService) Types(types ...string) *CountService {
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if s.types == nil {
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s.types = make([]string, 0)
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}
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s.types = append(s.types, types...)
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return s
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}
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func (s *CountService) Query(query Query) *CountService {
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s.query = query
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return s
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}
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func (s *CountService) Pretty(pretty bool) *CountService {
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s.pretty = pretty
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return s
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}
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func (s *CountService) Do() (int64, error) {
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var err error
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// Build url
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path := "/"
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// Indices part
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indexPart := make([]string, 0)
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for _, index := range s.indices {
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index, err = uritemplates.Expand("{index}", map[string]string{
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"index": index,
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})
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if err != nil {
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return 0, err
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}
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indexPart = append(indexPart, index)
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}
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if len(indexPart) > 0 {
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path += strings.Join(indexPart, ",")
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}
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// Types part
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typesPart := make([]string, 0)
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for _, typ := range s.types {
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typ, err = uritemplates.Expand("{type}", map[string]string{
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"type": typ,
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})
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if err != nil {
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return 0, err
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}
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typesPart = append(typesPart, typ)
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}
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if len(typesPart) > 0 {
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path += "/" + strings.Join(typesPart, ",")
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}
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// Search
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path += "/_count"
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// Parameters
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params := make(url.Values)
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if s.pretty {
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params.Set("pretty", fmt.Sprintf("%v", s.pretty))
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}
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// Set body if there is a query specified
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var body interface{}
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if s.query != nil {
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query := make(map[string]interface{})
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query["query"] = s.query.Source()
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body = query
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}
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// Get response
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res, err := s.client.PerformRequest("POST", path, params, body)
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if err != nil {
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return 0, err
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}
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// Return result
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ret := new(CountResult)
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if err := json.Unmarshal(res.Body, ret); err != nil {
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return 0, err
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}
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if ret != nil {
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return ret.Count, nil
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}
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return int64(0), nil
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}
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