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// Copyright 2012-present 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 (
"context"
"encoding/json"
"fmt"
"net/url"
"strings"
)
// MultiSearch executes one or more searches in one roundtrip.
type MultiSearchService struct {
client *Client
requests []*SearchRequest
indices []string
pretty bool
maxConcurrentRequests *int
preFilterShardSize *int
}
func NewMultiSearchService(client *Client) *MultiSearchService {
builder := &MultiSearchService{
client: client,
}
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) MaxConcurrentSearches(max int) *MultiSearchService {
s.maxConcurrentRequests = &max
return s
}
func (s *MultiSearchService) PreFilterShardSize(size int) *MultiSearchService {
s.preFilterShardSize = &size
return s
}
func (s *MultiSearchService) Do(ctx context.Context) (*MultiSearchResult, error) {
// Build url
path := "/_msearch"
// Parameters
params := make(url.Values)
if s.pretty {
params.Set("pretty", fmt.Sprintf("%v", s.pretty))
}
if v := s.maxConcurrentRequests; v != nil {
params.Set("max_concurrent_searches", fmt.Sprintf("%v", *v))
}
if v := s.preFilterShardSize; v != nil {
params.Set("pre_filter_shard_size", fmt.Sprintf("%v", *v))
}
// Set body
var lines []string
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 := sr.Body()
if err != nil {
return nil, err
}
lines = append(lines, string(header))
lines = append(lines, body)
}
body := strings.Join(lines, "\n") + "\n" // add trailing \n
// Get response
res, err := s.client.PerformRequest(ctx, "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
}
// MultiSearchResult is the outcome of running a multi-search operation.
type MultiSearchResult struct {
Responses []*SearchResult `json:"responses,omitempty"`
}
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