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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"
)
// Flush allows to flush one or more indices. The flush process of an index
// basically frees memory from the index by flushing data to the index
// storage and clearing the internal transaction log.
//
// See https://www.elastic.co/guide/en/elasticsearch/reference/5.2/indices-flush.html
// for details.
type IndicesFlushService struct {
client *Client
pretty bool
index []string
force *bool
waitIfOngoing *bool
ignoreUnavailable *bool
allowNoIndices *bool
expandWildcards string
}
// NewIndicesFlushService creates a new IndicesFlushService.
func NewIndicesFlushService(client *Client) *IndicesFlushService {
return &IndicesFlushService{
client: client,
index: make([]string, 0),
}
}
// Index is a list of index names; use `_all` or empty string for all indices.
func (s *IndicesFlushService) Index(indices ...string) *IndicesFlushService {
s.index = append(s.index, indices...)
return s
}
// Force indicates whether a flush should be forced even if it is not
// necessarily needed ie. if no changes will be committed to the index.
// This is useful if transaction log IDs should be incremented even if
// no uncommitted changes are present. (This setting can be considered as internal).
func (s *IndicesFlushService) Force(force bool) *IndicesFlushService {
s.force = &force
return s
}
// WaitIfOngoing, if set to true, indicates that the flush operation will
// block until the flush can be executed if another flush operation is
// already executing. The default is false and will cause an exception
// to be thrown on the shard level if another flush operation is already running..
func (s *IndicesFlushService) WaitIfOngoing(waitIfOngoing bool) *IndicesFlushService {
s.waitIfOngoing = &waitIfOngoing
return s
}
// IgnoreUnavailable indicates whether specified concrete indices should be
// ignored when unavailable (missing or closed).
func (s *IndicesFlushService) IgnoreUnavailable(ignoreUnavailable bool) *IndicesFlushService {
s.ignoreUnavailable = &ignoreUnavailable
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 *IndicesFlushService) AllowNoIndices(allowNoIndices bool) *IndicesFlushService {
s.allowNoIndices = &allowNoIndices
return s
}
// ExpandWildcards specifies whether to expand wildcard expression to
// concrete indices that are open, closed or both..
func (s *IndicesFlushService) ExpandWildcards(expandWildcards string) *IndicesFlushService {
s.expandWildcards = expandWildcards
return s
}
// Pretty indicates that the JSON response be indented and human readable.
func (s *IndicesFlushService) Pretty(pretty bool) *IndicesFlushService {
s.pretty = pretty
return s
}
// buildURL builds the URL for the operation.
func (s *IndicesFlushService) buildURL() (string, url.Values, error) {
// Build URL
var err error
var path string
if len(s.index) > 0 {
path, err = uritemplates.Expand("/{index}/_flush", map[string]string{
"index": strings.Join(s.index, ","),
})
} else {
path = "/_flush"
}
if err != nil {
return "", url.Values{}, err
}
// Add query string parameters
params := url.Values{}
if s.pretty {
params.Set("pretty", "1")
}
if s.force != nil {
params.Set("force", fmt.Sprintf("%v", *s.force))
}
if s.waitIfOngoing != nil {
params.Set("wait_if_ongoing", fmt.Sprintf("%v", *s.waitIfOngoing))
}
if s.ignoreUnavailable != nil {
params.Set("ignore_unavailable", fmt.Sprintf("%v", *s.ignoreUnavailable))
}
if s.allowNoIndices != nil {
params.Set("allow_no_indices", fmt.Sprintf("%v", *s.allowNoIndices))
}
if s.expandWildcards != "" {
params.Set("expand_wildcards", s.expandWildcards)
}
return path, params, nil
}
// Validate checks if the operation is valid.
func (s *IndicesFlushService) Validate() error {
return nil
}
// Do executes the service.
func (s *IndicesFlushService) Do(ctx context.Context) (*IndicesFlushResponse, 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(IndicesFlushResponse)
if err := s.client.decoder.Decode(res.Body, ret); err != nil {
return nil, err
}
return ret, nil
}
// -- Result of a flush request.
type IndicesFlushResponse struct {
Shards shardsInfo `json:"_shards"`
}
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