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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"
"github.com/olivere/elastic/uritemplates"
)
// IndicesRolloverService rolls an alias over to a new index when the
// existing index is considered to be too large or too old.
//
// It is documented at
// https://www.elastic.co/guide/en/elasticsearch/reference/6.0/indices-rollover-index.html.
type IndicesRolloverService struct {
client *Client
pretty bool
dryRun bool
newIndex string
alias string
masterTimeout string
timeout string
waitForActiveShards string
conditions map[string]interface{}
settings map[string]interface{}
mappings map[string]interface{}
bodyJson interface{}
bodyString string
}
// NewIndicesRolloverService creates a new IndicesRolloverService.
func NewIndicesRolloverService(client *Client) *IndicesRolloverService {
return &IndicesRolloverService{
client: client,
conditions: make(map[string]interface{}),
settings: make(map[string]interface{}),
mappings: make(map[string]interface{}),
}
}
// Alias is the name of the alias to rollover.
func (s *IndicesRolloverService) Alias(alias string) *IndicesRolloverService {
s.alias = alias
return s
}
// NewIndex is the name of the rollover index.
func (s *IndicesRolloverService) NewIndex(newIndex string) *IndicesRolloverService {
s.newIndex = newIndex
return s
}
// MasterTimeout specifies the timeout for connection to master.
func (s *IndicesRolloverService) MasterTimeout(masterTimeout string) *IndicesRolloverService {
s.masterTimeout = masterTimeout
return s
}
// Timeout sets an explicit operation timeout.
func (s *IndicesRolloverService) Timeout(timeout string) *IndicesRolloverService {
s.timeout = timeout
return s
}
// WaitForActiveShards sets the number of active shards to wait for on the
// newly created rollover index before the operation returns.
func (s *IndicesRolloverService) WaitForActiveShards(waitForActiveShards string) *IndicesRolloverService {
s.waitForActiveShards = waitForActiveShards
return s
}
// Pretty indicates that the JSON response be indented and human readable.
func (s *IndicesRolloverService) Pretty(pretty bool) *IndicesRolloverService {
s.pretty = pretty
return s
}
// DryRun, when set, specifies that only conditions are checked without
// performing the actual rollover.
func (s *IndicesRolloverService) DryRun(dryRun bool) *IndicesRolloverService {
s.dryRun = dryRun
return s
}
// Conditions allows to specify all conditions as a dictionary.
func (s *IndicesRolloverService) Conditions(conditions map[string]interface{}) *IndicesRolloverService {
s.conditions = conditions
return s
}
// AddCondition adds a condition to the rollover decision.
func (s *IndicesRolloverService) AddCondition(name string, value interface{}) *IndicesRolloverService {
s.conditions[name] = value
return s
}
// AddMaxIndexAgeCondition adds a condition to set the max index age.
func (s *IndicesRolloverService) AddMaxIndexAgeCondition(time string) *IndicesRolloverService {
s.conditions["max_age"] = time
return s
}
// AddMaxIndexDocsCondition adds a condition to set the max documents in the index.
func (s *IndicesRolloverService) AddMaxIndexDocsCondition(docs int64) *IndicesRolloverService {
s.conditions["max_docs"] = docs
return s
}
// Settings adds the index settings.
func (s *IndicesRolloverService) Settings(settings map[string]interface{}) *IndicesRolloverService {
s.settings = settings
return s
}
// AddSetting adds an index setting.
func (s *IndicesRolloverService) AddSetting(name string, value interface{}) *IndicesRolloverService {
s.settings[name] = value
return s
}
// Mappings adds the index mappings.
func (s *IndicesRolloverService) Mappings(mappings map[string]interface{}) *IndicesRolloverService {
s.mappings = mappings
return s
}
// AddMapping adds a mapping for the given type.
func (s *IndicesRolloverService) AddMapping(typ string, mapping interface{}) *IndicesRolloverService {
s.mappings[typ] = mapping
return s
}
// BodyJson sets the conditions that needs to be met for executing rollover,
// specified as a serializable JSON instance which is sent as the body of
// the request.
func (s *IndicesRolloverService) BodyJson(body interface{}) *IndicesRolloverService {
s.bodyJson = body
return s
}
// BodyString sets the conditions that needs to be met for executing rollover,
// specified as a string which is sent as the body of the request.
func (s *IndicesRolloverService) BodyString(body string) *IndicesRolloverService {
s.bodyString = body
return s
}
// getBody returns the body of the request, if not explicitly set via
// BodyJson or BodyString.
func (s *IndicesRolloverService) getBody() interface{} {
body := make(map[string]interface{})
if len(s.conditions) > 0 {
body["conditions"] = s.conditions
}
if len(s.settings) > 0 {
body["settings"] = s.settings
}
if len(s.mappings) > 0 {
body["mappings"] = s.mappings
}
return body
}
// buildURL builds the URL for the operation.
func (s *IndicesRolloverService) buildURL() (string, url.Values, error) {
// Build URL
var err error
var path string
if s.newIndex != "" {
path, err = uritemplates.Expand("/{alias}/_rollover/{new_index}", map[string]string{
"alias": s.alias,
"new_index": s.newIndex,
})
} else {
path, err = uritemplates.Expand("/{alias}/_rollover", map[string]string{
"alias": s.alias,
})
}
if err != nil {
return "", url.Values{}, err
}
// Add query string parameters
params := url.Values{}
if s.pretty {
params.Set("pretty", "true")
}
if s.dryRun {
params.Set("dry_run", "true")
}
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 *IndicesRolloverService) Validate() error {
var invalid []string
if s.alias == "" {
invalid = append(invalid, "Alias")
}
if len(invalid) > 0 {
return fmt.Errorf("missing required fields: %v", invalid)
}
return nil
}
// Do executes the operation.
func (s *IndicesRolloverService) Do(ctx context.Context) (*IndicesRolloverResponse, 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
} else {
body = s.getBody()
}
// Get HTTP response
res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
Method: "POST",
Path: path,
Params: params,
Body: body,
})
if err != nil {
return nil, err
}
// Return operation response
ret := new(IndicesRolloverResponse)
if err := json.Unmarshal(res.Body, ret); err != nil {
return nil, err
}
return ret, nil
}
// IndicesRolloverResponse is the response of IndicesRolloverService.Do.
type IndicesRolloverResponse struct {
OldIndex string `json:"old_index"`
NewIndex string `json:"new_index"`
RolledOver bool `json:"rolled_over"`
DryRun bool `json:"dry_run"`
Acknowledged bool `json:"acknowledged"`
ShardsAcknowledged bool `json:"shards_acknowledged"`
Conditions map[string]bool `json:"conditions"`
}
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