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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"
"fmt"
"net/url"
"strings"
"gopkg.in/olivere/elastic.v5/uritemplates"
)
// IndicesForcemergeService allows to force merging of one or more indices.
// The merge relates to the number of segments a Lucene index holds
// within each shard. The force merge operation allows to reduce the number
// of segments by merging them.
//
// See http://www.elastic.co/guide/en/elasticsearch/reference/5.2/indices-forcemerge.html
// for more information.
type IndicesForcemergeService struct {
client *Client
pretty bool
index []string
allowNoIndices *bool
expandWildcards string
flush *bool
ignoreUnavailable *bool
maxNumSegments interface{}
onlyExpungeDeletes *bool
operationThreading interface{}
}
// NewIndicesForcemergeService creates a new IndicesForcemergeService.
func NewIndicesForcemergeService(client *Client) *IndicesForcemergeService {
return &IndicesForcemergeService{
client: client,
index: make([]string, 0),
}
}
// Index is a list of index names; use `_all` or empty string to perform
// the operation on all indices.
func (s *IndicesForcemergeService) Index(index ...string) *IndicesForcemergeService {
if s.index == nil {
s.index = make([]string, 0)
}
s.index = append(s.index, index...)
return s
}
// AllowNoIndices indicates whether to ignore if a wildcard indices
// expression resolves into no concrete indices.
// (This includes `_all` string or when no indices have been specified).
func (s *IndicesForcemergeService) AllowNoIndices(allowNoIndices bool) *IndicesForcemergeService {
s.allowNoIndices = &allowNoIndices
return s
}
// ExpandWildcards indicates whether to expand wildcard expression to
// concrete indices that are open, closed or both..
func (s *IndicesForcemergeService) ExpandWildcards(expandWildcards string) *IndicesForcemergeService {
s.expandWildcards = expandWildcards
return s
}
// Flush specifies whether the index should be flushed after performing
// the operation (default: true).
func (s *IndicesForcemergeService) Flush(flush bool) *IndicesForcemergeService {
s.flush = &flush
return s
}
// IgnoreUnavailable indicates whether specified concrete indices should
// be ignored when unavailable (missing or closed).
func (s *IndicesForcemergeService) IgnoreUnavailable(ignoreUnavailable bool) *IndicesForcemergeService {
s.ignoreUnavailable = &ignoreUnavailable
return s
}
// MaxNumSegments specifies the number of segments the index should be
// merged into (default: dynamic).
func (s *IndicesForcemergeService) MaxNumSegments(maxNumSegments interface{}) *IndicesForcemergeService {
s.maxNumSegments = maxNumSegments
return s
}
// OnlyExpungeDeletes specifies whether the operation should only expunge
// deleted documents.
func (s *IndicesForcemergeService) OnlyExpungeDeletes(onlyExpungeDeletes bool) *IndicesForcemergeService {
s.onlyExpungeDeletes = &onlyExpungeDeletes
return s
}
func (s *IndicesForcemergeService) OperationThreading(operationThreading interface{}) *IndicesForcemergeService {
s.operationThreading = operationThreading
return s
}
// Pretty indicates that the JSON response be indented and human readable.
func (s *IndicesForcemergeService) Pretty(pretty bool) *IndicesForcemergeService {
s.pretty = pretty
return s
}
// buildURL builds the URL for the operation.
func (s *IndicesForcemergeService) buildURL() (string, url.Values, error) {
var err error
var path string
// Build URL
if len(s.index) > 0 {
path, err = uritemplates.Expand("/{index}/_forcemerge", map[string]string{
"index": strings.Join(s.index, ","),
})
} else {
path = "/_forcemerge"
}
if err != nil {
return "", url.Values{}, err
}
// Add query string parameters
params := url.Values{}
if s.pretty {
params.Set("pretty", "1")
}
if s.allowNoIndices != nil {
params.Set("allow_no_indices", fmt.Sprintf("%v", *s.allowNoIndices))
}
if s.expandWildcards != "" {
params.Set("expand_wildcards", s.expandWildcards)
}
if s.flush != nil {
params.Set("flush", fmt.Sprintf("%v", *s.flush))
}
if s.ignoreUnavailable != nil {
params.Set("ignore_unavailable", fmt.Sprintf("%v", *s.ignoreUnavailable))
}
if s.maxNumSegments != nil {
params.Set("max_num_segments", fmt.Sprintf("%v", s.maxNumSegments))
}
if s.onlyExpungeDeletes != nil {
params.Set("only_expunge_deletes", fmt.Sprintf("%v", *s.onlyExpungeDeletes))
}
if s.operationThreading != nil {
params.Set("operation_threading", fmt.Sprintf("%v", s.operationThreading))
}
return path, params, nil
}
// Validate checks if the operation is valid.
func (s *IndicesForcemergeService) Validate() error {
return nil
}
// Do executes the operation.
func (s *IndicesForcemergeService) Do(ctx context.Context) (*IndicesForcemergeResponse, error) {
// Check pre-conditions
if err := s.Validate(); err != nil {
return nil, err
}
// Get URL for request
path, params, err := s.buildURL()
if err != nil {
return nil, err
}
// Get HTTP response
res, err := s.client.PerformRequest(ctx, "POST", path, params, nil)
if err != nil {
return nil, err
}
// Return operation response
ret := new(IndicesForcemergeResponse)
if err := s.client.decoder.Decode(res.Body, ret); err != nil {
return nil, err
}
return ret, nil
}
// IndicesForcemergeResponse is the response of IndicesForcemergeService.Do.
type IndicesForcemergeResponse struct {
Shards shardsInfo `json:"_shards"`
}
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