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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/http"
"net/url"
"strings"
)
// ClearScrollService clears one or more scroll contexts by their ids.
//
// See https://www.elastic.co/guide/en/elasticsearch/reference/7.0/search-request-scroll.html#_clear_scroll_api
// for details.
type ClearScrollService struct {
client *Client
pretty *bool // pretty format the returned JSON response
human *bool // return human readable values for statistics
errorTrace *bool // include the stack trace of returned errors
filterPath []string // list of filters used to reduce the response
headers http.Header // custom request-level HTTP headers
scrollId []string
}
// NewClearScrollService creates a new ClearScrollService.
func NewClearScrollService(client *Client) *ClearScrollService {
return &ClearScrollService{
client: client,
scrollId: make([]string, 0),
}
}
// Pretty tells Elasticsearch whether to return a formatted JSON response.
func (s *ClearScrollService) Pretty(pretty bool) *ClearScrollService {
s.pretty = &pretty
return s
}
// Human specifies whether human readable values should be returned in
// the JSON response, e.g. "7.5mb".
func (s *ClearScrollService) Human(human bool) *ClearScrollService {
s.human = &human
return s
}
// ErrorTrace specifies whether to include the stack trace of returned errors.
func (s *ClearScrollService) ErrorTrace(errorTrace bool) *ClearScrollService {
s.errorTrace = &errorTrace
return s
}
// FilterPath specifies a list of filters used to reduce the response.
func (s *ClearScrollService) FilterPath(filterPath ...string) *ClearScrollService {
s.filterPath = filterPath
return s
}
// Header adds a header to the request.
func (s *ClearScrollService) Header(name string, value string) *ClearScrollService {
if s.headers == nil {
s.headers = http.Header{}
}
s.headers.Add(name, value)
return s
}
// Headers specifies the headers of the request.
func (s *ClearScrollService) Headers(headers http.Header) *ClearScrollService {
s.headers = headers
return s
}
// ScrollId is a list of scroll IDs to clear.
// Use _all to clear all search contexts.
func (s *ClearScrollService) ScrollId(scrollIds ...string) *ClearScrollService {
s.scrollId = append(s.scrollId, scrollIds...)
return s
}
// buildURL builds the URL for the operation.
func (s *ClearScrollService) buildURL() (string, url.Values, error) {
// Build URL
path := "/_search/scroll/"
// Add query string parameters
params := url.Values{}
if v := s.pretty; v != nil {
params.Set("pretty", fmt.Sprint(*v))
}
if v := s.human; v != nil {
params.Set("human", fmt.Sprint(*v))
}
if v := s.errorTrace; v != nil {
params.Set("error_trace", fmt.Sprint(*v))
}
if len(s.filterPath) > 0 {
params.Set("filter_path", strings.Join(s.filterPath, ","))
}
return path, params, nil
}
// Validate checks if the operation is valid.
func (s *ClearScrollService) Validate() error {
var invalid []string
if len(s.scrollId) == 0 {
invalid = append(invalid, "ScrollId")
}
if len(invalid) > 0 {
return fmt.Errorf("missing required fields: %v", invalid)
}
return nil
}
// Do executes the operation.
func (s *ClearScrollService) Do(ctx context.Context) (*ClearScrollResponse, 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
body := map[string][]string{
"scroll_id": s.scrollId,
}
// Get HTTP response
res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
Method: "DELETE",
Path: path,
Params: params,
Body: body,
Headers: s.headers,
})
if err != nil {
return nil, err
}
// Return operation response
ret := new(ClearScrollResponse)
if err := s.client.decoder.Decode(res.Body, ret); err != nil {
return nil, err
}
return ret, nil
}
// ClearScrollResponse is the response of ClearScrollService.Do.
type ClearScrollResponse struct {
Succeeded bool `json:"succeeded,omitempty"`
NumFreed int `json:"num_freed,omitempty"`
}
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