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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"
"gopkg.in/olivere/elastic.v5/uritemplates"
)
// IndicesShrinkService allows you to shrink an existing index into a
// new index with fewer primary shards.
//
// For further details, see
// https://www.elastic.co/guide/en/elasticsearch/reference/5.2/indices-shrink-index.html.
type IndicesShrinkService struct {
client *Client
pretty bool
source string
target string
masterTimeout string
timeout string
waitForActiveShards string
bodyJson interface{}
bodyString string
}
// NewIndicesShrinkService creates a new IndicesShrinkService.
func NewIndicesShrinkService(client *Client) *IndicesShrinkService {
return &IndicesShrinkService{
client: client,
}
}
// Source is the name of the source index to shrink.
func (s *IndicesShrinkService) Source(source string) *IndicesShrinkService {
s.source = source
return s
}
// Target is the name of the target index to shrink into.
func (s *IndicesShrinkService) Target(target string) *IndicesShrinkService {
s.target = target
return s
}
// MasterTimeout specifies the timeout for connection to master.
func (s *IndicesShrinkService) MasterTimeout(masterTimeout string) *IndicesShrinkService {
s.masterTimeout = masterTimeout
return s
}
// Timeout is an explicit operation timeout.
func (s *IndicesShrinkService) Timeout(timeout string) *IndicesShrinkService {
s.timeout = timeout
return s
}
// WaitForActiveShards sets the number of active shards to wait for on
// the shrunken index before the operation returns.
func (s *IndicesShrinkService) WaitForActiveShards(waitForActiveShards string) *IndicesShrinkService {
s.waitForActiveShards = waitForActiveShards
return s
}
// Pretty indicates that the JSON response be indented and human readable.
func (s *IndicesShrinkService) Pretty(pretty bool) *IndicesShrinkService {
s.pretty = pretty
return s
}
// BodyJson is the configuration for the target index (`settings` and `aliases`)
// defined as a JSON-serializable instance to be sent as the request body.
func (s *IndicesShrinkService) BodyJson(body interface{}) *IndicesShrinkService {
s.bodyJson = body
return s
}
// BodyString is the configuration for the target index (`settings` and `aliases`)
// defined as a string to send as the request body.
func (s *IndicesShrinkService) BodyString(body string) *IndicesShrinkService {
s.bodyString = body
return s
}
// buildURL builds the URL for the operation.
func (s *IndicesShrinkService) buildURL() (string, url.Values, error) {
// Build URL
path, err := uritemplates.Expand("/{source}/_shrink/{target}", map[string]string{
"source": s.source,
"target": s.target,
})
if err != nil {
return "", url.Values{}, err
}
// Add query string parameters
params := url.Values{}
if s.pretty {
params.Set("pretty", "1")
}
if s.masterTimeout != "" {
params.Set("master_timeout", s.masterTimeout)
}
if s.timeout != "" {
params.Set("timeout", s.timeout)
}
if s.waitForActiveShards != "" {
params.Set("wait_for_active_shards", s.waitForActiveShards)
}
return path, params, nil
}
// Validate checks if the operation is valid.
func (s *IndicesShrinkService) Validate() error {
var invalid []string
if s.source == "" {
invalid = append(invalid, "Source")
}
if s.target == "" {
invalid = append(invalid, "Target")
}
if len(invalid) > 0 {
return fmt.Errorf("missing required fields: %v", invalid)
}
return nil
}
// Do executes the operation.
func (s *IndicesShrinkService) Do(ctx context.Context) (*IndicesShrinkResponse, 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
}
// Setup HTTP request body
var body interface{}
if s.bodyJson != nil {
body = s.bodyJson
} else if s.bodyString != "" {
body = s.bodyString
}
// Get HTTP response
res, err := s.client.PerformRequest(ctx, "POST", path, params, body)
if err != nil {
return nil, err
}
// Return operation response
ret := new(IndicesShrinkResponse)
if err := json.Unmarshal(res.Body, ret); err != nil {
return nil, err
}
return ret, nil
}
// IndicesShrinkResponse is the response of IndicesShrinkService.Do.
type IndicesShrinkResponse struct {
Acknowledged bool `json:"acknowledged"`
ShardsAcknowledged bool `json:"shards_acknowledged"`
}
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