Add `access` format support for Elasticsearch notification target (#4006)
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.
2017-03-31 23:11:27 +02:00
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// Copyright 2012-present Oliver Eilhard. All rights reserved.
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2016-07-24 07:51:12 +02:00
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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 "errors"
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// FiltersAggregation defines a multi bucket aggregations where each bucket
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// is associated with a filter. Each bucket will collect all documents that
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// match its associated filter.
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//
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// Notice that the caller has to decide whether to add filters by name
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// (using FilterWithName) or unnamed filters (using Filter or Filters). One cannot
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// use both named and unnamed filters.
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//
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// For details, see
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Add `access` format support for Elasticsearch notification target (#4006)
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.
2017-03-31 23:11:27 +02:00
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// https://www.elastic.co/guide/en/elasticsearch/reference/5.2/search-aggregations-bucket-filters-aggregation.html
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2016-07-24 07:51:12 +02:00
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type FiltersAggregation struct {
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unnamedFilters []Query
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namedFilters map[string]Query
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subAggregations map[string]Aggregation
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meta map[string]interface{}
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}
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// NewFiltersAggregation initializes a new FiltersAggregation.
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func NewFiltersAggregation() *FiltersAggregation {
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return &FiltersAggregation{
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unnamedFilters: make([]Query, 0),
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namedFilters: make(map[string]Query),
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subAggregations: make(map[string]Aggregation),
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}
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}
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// Filter adds an unnamed filter. Notice that you can
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// either use named or unnamed filters, but not both.
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func (a *FiltersAggregation) Filter(filter Query) *FiltersAggregation {
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a.unnamedFilters = append(a.unnamedFilters, filter)
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return a
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}
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// Filters adds one or more unnamed filters. Notice that you can
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// either use named or unnamed filters, but not both.
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func (a *FiltersAggregation) Filters(filters ...Query) *FiltersAggregation {
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if len(filters) > 0 {
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a.unnamedFilters = append(a.unnamedFilters, filters...)
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}
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return a
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}
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// FilterWithName adds a filter with a specific name. Notice that you can
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// either use named or unnamed filters, but not both.
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func (a *FiltersAggregation) FilterWithName(name string, filter Query) *FiltersAggregation {
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a.namedFilters[name] = filter
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return a
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}
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// SubAggregation adds a sub-aggregation to this aggregation.
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func (a *FiltersAggregation) SubAggregation(name string, subAggregation Aggregation) *FiltersAggregation {
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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 *FiltersAggregation) Meta(metaData map[string]interface{}) *FiltersAggregation {
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a.meta = metaData
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return a
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}
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// Source returns the a JSON-serializable interface.
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// If the aggregation is invalid, an error is returned. This may e.g. happen
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// if you mixed named and unnamed filters.
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func (a *FiltersAggregation) Source() (interface{}, error) {
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// Example:
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// {
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// "aggs" : {
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// "messages" : {
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// "filters" : {
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// "filters" : {
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// "errors" : { "term" : { "body" : "error" }},
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// "warnings" : { "term" : { "body" : "warning" }}
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// }
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// }
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// }
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// }
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// }
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// This method returns only the (outer) { "filters" : {} } part.
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source := make(map[string]interface{})
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filters := make(map[string]interface{})
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source["filters"] = filters
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if len(a.unnamedFilters) > 0 && len(a.namedFilters) > 0 {
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return nil, errors.New("elastic: use either named or unnamed filters with FiltersAggregation but not both")
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}
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if len(a.unnamedFilters) > 0 {
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arr := make([]interface{}, len(a.unnamedFilters))
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for i, filter := range a.unnamedFilters {
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src, err := filter.Source()
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if err != nil {
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return nil, err
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}
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arr[i] = src
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}
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filters["filters"] = arr
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} else {
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dict := make(map[string]interface{})
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for key, filter := range a.namedFilters {
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src, err := filter.Source()
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if err != nil {
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return nil, err
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}
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dict[key] = src
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}
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filters["filters"] = dict
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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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