a2a8d54bb6
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.
87 lines
2.6 KiB
Go
87 lines
2.6 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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// ReverseNestedAggregation defines a special single bucket aggregation
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// that enables aggregating on parent docs from nested documents.
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// Effectively this aggregation can break out of the nested block
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// structure and link to other nested structures or the root document,
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// which allows nesting other aggregations that aren’t part of
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// the nested object in a nested aggregation.
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//
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// See: https://www.elastic.co/guide/en/elasticsearch/reference/5.2/search-aggregations-bucket-reverse-nested-aggregation.html
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type ReverseNestedAggregation struct {
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path string
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subAggregations map[string]Aggregation
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meta map[string]interface{}
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}
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// NewReverseNestedAggregation initializes a new ReverseNestedAggregation
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// bucket aggregation.
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func NewReverseNestedAggregation() *ReverseNestedAggregation {
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return &ReverseNestedAggregation{
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subAggregations: make(map[string]Aggregation),
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}
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}
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// Path set the path to use for this nested aggregation. The path must match
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// the path to a nested object in the mappings. If it is not specified
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// then this aggregation will go back to the root document.
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func (a *ReverseNestedAggregation) Path(path string) *ReverseNestedAggregation {
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a.path = path
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return a
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}
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func (a *ReverseNestedAggregation) SubAggregation(name string, subAggregation Aggregation) *ReverseNestedAggregation {
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a.subAggregations[name] = subAggregation
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return a
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}
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// Meta sets the meta data to be included in the aggregation response.
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func (a *ReverseNestedAggregation) Meta(metaData map[string]interface{}) *ReverseNestedAggregation {
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a.meta = metaData
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return a
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}
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func (a *ReverseNestedAggregation) Source() (interface{}, error) {
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// Example:
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// {
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// "aggs" : {
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// "reverse_nested" : {
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// "path": "..."
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// }
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// }
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// }
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// This method returns only the { "reverse_nested" : {} } part.
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source := make(map[string]interface{})
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opts := make(map[string]interface{})
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source["reverse_nested"] = opts
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if a.path != "" {
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opts["path"] = a.path
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}
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// AggregationBuilder (SubAggregations)
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if len(a.subAggregations) > 0 {
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aggsMap := make(map[string]interface{})
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source["aggregations"] = aggsMap
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for name, aggregate := range a.subAggregations {
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src, err := aggregate.Source()
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if err != nil {
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return nil, err
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}
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aggsMap[name] = src
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}
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}
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// Add Meta data if available
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if len(a.meta) > 0 {
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source["meta"] = a.meta
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}
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return source, nil
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}
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