This change adds `access` format support for notifications to a Elasticsearch server, and it refactors `namespace` format support. In the case of `access` format, for each event in Minio, a JSON document is inserted into Elasticsearch with its timestamp set to the event's timestamp, and with the ID generated automatically by elasticsearch. No events are modified or deleted in this mode. In the case of `namespace` format, for each event in Minio, a JSON document is keyed together by the bucket and object name is updated in Elasticsearch. In the case of an object being created or over-written in Minio, a new document or an existing document is inserted into the Elasticsearch index. If an object is deleted in Minio, the corresponding document is deleted from the Elasticsearch index. Additionally, this change upgrades Elasticsearch support to the 5.x series. This is a breaking change, and users of previous elasticsearch versions should upgrade. Also updates documentation on Elasticsearch notification target usage and has a link to an elasticsearch upgrade guide. This is the last patch that finally resolves #3928.
177 lines
4.1 KiB
Go
177 lines
4.1 KiB
Go
// Copyright 2012-present Oliver Eilhard. All rights reserved.
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// Use of this source code is governed by a MIT-license.
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// See http://olivere.mit-license.org/license.txt for details.
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package elastic
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import (
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"fmt"
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"net/http"
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"net/url"
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"golang.org/x/net/context"
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"gopkg.in/olivere/elastic.v5/uritemplates"
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)
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// ExistsService checks for the existence of a document using HEAD.
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//
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// See https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-get.html
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// for details.
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type ExistsService struct {
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client *Client
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pretty bool
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id string
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index string
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typ string
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preference string
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realtime *bool
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refresh string
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routing string
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parent string
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}
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// NewExistsService creates a new ExistsService.
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func NewExistsService(client *Client) *ExistsService {
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return &ExistsService{
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client: client,
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}
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}
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// Id is the document ID.
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func (s *ExistsService) Id(id string) *ExistsService {
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s.id = id
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return s
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}
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// Index is the name of the index.
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func (s *ExistsService) Index(index string) *ExistsService {
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s.index = index
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return s
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}
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// Type is the type of the document (use `_all` to fetch the first document
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// matching the ID across all types).
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func (s *ExistsService) Type(typ string) *ExistsService {
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s.typ = typ
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return s
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}
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// Preference specifies the node or shard the operation should be performed on (default: random).
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func (s *ExistsService) Preference(preference string) *ExistsService {
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s.preference = preference
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return s
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}
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// Realtime specifies whether to perform the operation in realtime or search mode.
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func (s *ExistsService) Realtime(realtime bool) *ExistsService {
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s.realtime = &realtime
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return s
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}
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// Refresh the shard containing the document before performing the operation.
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func (s *ExistsService) Refresh(refresh string) *ExistsService {
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s.refresh = refresh
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return s
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}
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// Routing is a specific routing value.
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func (s *ExistsService) Routing(routing string) *ExistsService {
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s.routing = routing
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return s
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}
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// Parent is the ID of the parent document.
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func (s *ExistsService) Parent(parent string) *ExistsService {
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s.parent = parent
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return s
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}
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// Pretty indicates that the JSON response be indented and human readable.
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func (s *ExistsService) Pretty(pretty bool) *ExistsService {
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s.pretty = pretty
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return s
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}
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// buildURL builds the URL for the operation.
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func (s *ExistsService) buildURL() (string, url.Values, error) {
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// Build URL
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path, err := uritemplates.Expand("/{index}/{type}/{id}", map[string]string{
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"id": s.id,
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"index": s.index,
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"type": s.typ,
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})
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if err != nil {
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return "", url.Values{}, err
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}
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// Add query string parameters
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params := url.Values{}
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if s.pretty {
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params.Set("pretty", "1")
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}
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if s.realtime != nil {
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params.Set("realtime", fmt.Sprintf("%v", *s.realtime))
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}
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if s.refresh != "" {
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params.Set("refresh", s.refresh)
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}
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if s.routing != "" {
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params.Set("routing", s.routing)
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}
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if s.parent != "" {
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params.Set("parent", s.parent)
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}
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if s.preference != "" {
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params.Set("preference", s.preference)
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}
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return path, params, nil
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}
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// Validate checks if the operation is valid.
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func (s *ExistsService) Validate() error {
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var invalid []string
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if s.id == "" {
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invalid = append(invalid, "Id")
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}
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if s.index == "" {
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invalid = append(invalid, "Index")
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}
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if s.typ == "" {
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invalid = append(invalid, "Type")
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}
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if len(invalid) > 0 {
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return fmt.Errorf("missing required fields: %v", invalid)
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}
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return nil
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}
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// Do executes the operation.
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func (s *ExistsService) Do(ctx context.Context) (bool, error) {
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// Check pre-conditions
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if err := s.Validate(); err != nil {
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return false, err
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}
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// Get URL for request
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path, params, err := s.buildURL()
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if err != nil {
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return false, err
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}
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// Get HTTP response
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res, err := s.client.PerformRequest(ctx, "HEAD", path, params, nil, 404)
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if err != nil {
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return false, err
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}
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// Return operation response
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switch res.StatusCode {
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case http.StatusOK:
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return true, nil
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case http.StatusNotFound:
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return false, nil
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default:
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return false, fmt.Errorf("elastic: got HTTP code %d when it should have been either 200 or 404", res.StatusCode)
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}
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}
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