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.
253 lines
6.4 KiB
Go
253 lines
6.4 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/url"
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"strings"
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"golang.org/x/net/context"
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)
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// MgetService allows to get multiple documents based on an index,
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// type (optional) and id (possibly routing). The response includes
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// a docs array with all the fetched documents, each element similar
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// in structure to a document provided by the Get API.
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//
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// See https://www.elastic.co/guide/en/elasticsearch/reference/5.2/docs-multi-get.html
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// for details.
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type MgetService struct {
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client *Client
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pretty bool
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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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storedFields []string
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items []*MultiGetItem
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}
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// NewMgetService initializes a new Multi GET API request call.
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func NewMgetService(client *Client) *MgetService {
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builder := &MgetService{
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client: client,
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}
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return builder
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}
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// Preference specifies the node or shard the operation should be performed
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// on (default: random).
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func (s *MgetService) Preference(preference string) *MgetService {
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s.preference = preference
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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 *MgetService) Refresh(refresh string) *MgetService {
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s.refresh = refresh
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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 *MgetService) Realtime(realtime bool) *MgetService {
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s.realtime = &realtime
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return s
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}
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// Routing is the specific routing value.
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func (s *MgetService) Routing(routing string) *MgetService {
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s.routing = routing
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return s
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}
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// StoredFields is a list of fields to return in the response.
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func (s *MgetService) StoredFields(storedFields ...string) *MgetService {
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s.storedFields = append(s.storedFields, storedFields...)
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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 *MgetService) Pretty(pretty bool) *MgetService {
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s.pretty = pretty
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return s
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}
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// Add an item to the request.
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func (s *MgetService) Add(items ...*MultiGetItem) *MgetService {
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s.items = append(s.items, items...)
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return s
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}
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// Source returns the request body, which will be serialized into JSON.
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func (s *MgetService) Source() (interface{}, error) {
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source := make(map[string]interface{})
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items := make([]interface{}, len(s.items))
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for i, item := range s.items {
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src, err := item.Source()
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if err != nil {
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return nil, err
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}
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items[i] = src
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}
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source["docs"] = items
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return source, nil
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}
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// Do executes the request.
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func (s *MgetService) Do(ctx context.Context) (*MgetResponse, error) {
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// Build url
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path := "/_mget"
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params := make(url.Values)
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if s.realtime != nil {
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params.Add("realtime", fmt.Sprintf("%v", *s.realtime))
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}
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if s.preference != "" {
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params.Add("preference", s.preference)
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}
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if s.refresh != "" {
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params.Add("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 len(s.storedFields) > 0 {
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params.Set("stored_fields", strings.Join(s.storedFields, ","))
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}
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// Set body
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body, err := s.Source()
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if err != nil {
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return nil, err
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}
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// Get response
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res, err := s.client.PerformRequest(ctx, "GET", path, params, body)
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if err != nil {
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return nil, err
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}
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// Return result
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ret := new(MgetResponse)
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if err := s.client.decoder.Decode(res.Body, ret); err != nil {
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return nil, err
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}
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return ret, nil
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}
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// -- Multi Get Item --
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// MultiGetItem is a single document to retrieve via the MgetService.
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type MultiGetItem struct {
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index string
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typ string
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id string
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routing string
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storedFields []string
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version *int64 // see org.elasticsearch.common.lucene.uid.Versions
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versionType string // see org.elasticsearch.index.VersionType
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fsc *FetchSourceContext
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}
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// NewMultiGetItem initializes a new, single item for a Multi GET request.
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func NewMultiGetItem() *MultiGetItem {
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return &MultiGetItem{}
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}
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// Index specifies the index name.
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func (item *MultiGetItem) Index(index string) *MultiGetItem {
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item.index = index
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return item
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}
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// Type specifies the type name.
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func (item *MultiGetItem) Type(typ string) *MultiGetItem {
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item.typ = typ
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return item
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}
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// Id specifies the identifier of the document.
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func (item *MultiGetItem) Id(id string) *MultiGetItem {
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item.id = id
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return item
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}
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// Routing is the specific routing value.
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func (item *MultiGetItem) Routing(routing string) *MultiGetItem {
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item.routing = routing
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return item
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}
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// StoredFields is a list of fields to return in the response.
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func (item *MultiGetItem) StoredFields(storedFields ...string) *MultiGetItem {
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item.storedFields = append(item.storedFields, storedFields...)
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return item
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}
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// Version can be MatchAny (-3), MatchAnyPre120 (0), NotFound (-1),
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// or NotSet (-2). These are specified in org.elasticsearch.common.lucene.uid.Versions.
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// The default in Elasticsearch is MatchAny (-3).
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func (item *MultiGetItem) Version(version int64) *MultiGetItem {
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item.version = &version
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return item
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}
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// VersionType can be "internal", "external", "external_gt", "external_gte",
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// or "force". See org.elasticsearch.index.VersionType in Elasticsearch source.
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// It is "internal" by default.
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func (item *MultiGetItem) VersionType(versionType string) *MultiGetItem {
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item.versionType = versionType
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return item
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}
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// FetchSource allows to specify source filtering.
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func (item *MultiGetItem) FetchSource(fetchSourceContext *FetchSourceContext) *MultiGetItem {
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item.fsc = fetchSourceContext
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return item
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}
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// Source returns the serialized JSON to be sent to Elasticsearch as
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// part of a MultiGet search.
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func (item *MultiGetItem) Source() (interface{}, error) {
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source := make(map[string]interface{})
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source["_id"] = item.id
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if item.index != "" {
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source["_index"] = item.index
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}
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if item.typ != "" {
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source["_type"] = item.typ
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}
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if item.fsc != nil {
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src, err := item.fsc.Source()
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if err != nil {
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return nil, err
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}
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source["_source"] = src
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}
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if item.routing != "" {
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source["_routing"] = item.routing
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}
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if len(item.storedFields) > 0 {
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source["stored_fields"] = strings.Join(item.storedFields, ",")
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}
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if item.version != nil {
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source["version"] = fmt.Sprintf("%d", *item.version)
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}
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if item.versionType != "" {
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source["version_type"] = item.versionType
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}
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return source, nil
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}
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// -- Result of a Multi Get request.
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// MgetResponse is the outcome of a Multi GET API request.
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type MgetResponse struct {
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Docs []*GetResult `json:"docs,omitempty"`
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}
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