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// Copyright 2012-2015 Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.
package elastic
import (
"encoding/json"
"fmt"
"net/url"
"strings"
)
// MultiSearch executes one or more searches in one roundtrip.
// See http://www.elasticsearch.org/guide/reference/api/multi-search/
type MultiSearchService struct {
client *Client
requests []*SearchRequest
indices []string
pretty bool
routing string
preference string
}
func NewMultiSearchService(client *Client) *MultiSearchService {
builder := &MultiSearchService{
client: client,
requests: make([]*SearchRequest, 0),
indices: make([]string, 0),
}
return builder
}
func (s *MultiSearchService) Add(requests ...*SearchRequest) *MultiSearchService {
s.requests = append(s.requests, requests...)
return s
}
func (s *MultiSearchService) Index(indices ...string) *MultiSearchService {
s.indices = append(s.indices, indices...)
return s
}
func (s *MultiSearchService) Pretty(pretty bool) *MultiSearchService {
s.pretty = pretty
return s
}
func (s *MultiSearchService) Do() (*MultiSearchResult, error) {
// Build url
path := "/_msearch"
// Parameters
params := make(url.Values)
if s.pretty {
params.Set("pretty", fmt.Sprintf("%v", s.pretty))
}
// Set body
lines := make([]string, 0)
for _, sr := range s.requests {
// Set default indices if not specified in the request
if !sr.HasIndices() && len(s.indices) > 0 {
sr = sr.Index(s.indices...)
}
header, err := json.Marshal(sr.header())
if err != nil {
return nil, err
}
body, err := json.Marshal(sr.body())
if err != nil {
return nil, err
}
lines = append(lines, string(header))
lines = append(lines, string(body))
}
body := strings.Join(lines, "\n") + "\n" // Don't forget trailing \n
// Get response
res, err := s.client.PerformRequest("GET", path, params, body)
if err != nil {
return nil, err
}
// Return result
ret := new(MultiSearchResult)
if err := s.client.decoder.Decode(res.Body, ret); err != nil {
return nil, err
}
return ret, nil
}
type MultiSearchResult struct {
Responses []*SearchResult `json:"responses,omitempty"`
}
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