f248089523
* Implement basic S3 notifications through queues Supports multiple queues and three basic queue types: 1. NilQueue -- messages don't get sent anywhere 2. LogQueue -- messages get logged 3. AmqpQueue -- messages are sent to an AMQP queue * api: Implement bucket notification. Supports two different queue types - AMQP - ElasticSearch. * Add support for redis
125 lines
3.6 KiB
Go
125 lines
3.6 KiB
Go
// Copyright 2012-2015 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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// DerivativeAggregation is a parent pipeline aggregation which calculates
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// the derivative of a specified metric in a parent histogram (or date_histogram)
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// aggregation. The specified metric must be numeric and the enclosing
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// histogram must have min_doc_count set to 0 (default for histogram aggregations).
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//
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// For more details, see
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// https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-pipeline-derivative-aggregation.html
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type DerivativeAggregation struct {
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format string
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gapPolicy string
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unit string
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subAggregations map[string]Aggregation
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meta map[string]interface{}
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bucketsPaths []string
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}
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// NewDerivativeAggregation creates and initializes a new DerivativeAggregation.
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func NewDerivativeAggregation() *DerivativeAggregation {
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return &DerivativeAggregation{
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subAggregations: make(map[string]Aggregation),
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bucketsPaths: make([]string, 0),
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}
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}
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func (a *DerivativeAggregation) Format(format string) *DerivativeAggregation {
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a.format = format
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return a
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}
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// GapPolicy defines what should be done when a gap in the series is discovered.
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// Valid values include "insert_zeros" or "skip". Default is "insert_zeros".
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func (a *DerivativeAggregation) GapPolicy(gapPolicy string) *DerivativeAggregation {
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a.gapPolicy = gapPolicy
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return a
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}
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// GapInsertZeros inserts zeros for gaps in the series.
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func (a *DerivativeAggregation) GapInsertZeros() *DerivativeAggregation {
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a.gapPolicy = "insert_zeros"
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return a
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}
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// GapSkip skips gaps in the series.
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func (a *DerivativeAggregation) GapSkip() *DerivativeAggregation {
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a.gapPolicy = "skip"
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return a
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}
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// Unit sets the unit provided, e.g. "1d" or "1y".
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// It is only useful when calculating the derivative using a date_histogram.
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func (a *DerivativeAggregation) Unit(unit string) *DerivativeAggregation {
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a.unit = unit
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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 *DerivativeAggregation) SubAggregation(name string, subAggregation Aggregation) *DerivativeAggregation {
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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 *DerivativeAggregation) Meta(metaData map[string]interface{}) *DerivativeAggregation {
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a.meta = metaData
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return a
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}
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// BucketsPath sets the paths to the buckets to use for this pipeline aggregator.
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func (a *DerivativeAggregation) BucketsPath(bucketsPaths ...string) *DerivativeAggregation {
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a.bucketsPaths = append(a.bucketsPaths, bucketsPaths...)
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return a
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}
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func (a *DerivativeAggregation) Source() (interface{}, error) {
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source := make(map[string]interface{})
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params := make(map[string]interface{})
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source["derivative"] = params
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if a.format != "" {
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params["format"] = a.format
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}
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if a.gapPolicy != "" {
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params["gap_policy"] = a.gapPolicy
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}
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if a.unit != "" {
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params["unit"] = a.unit
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}
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// Add buckets paths
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switch len(a.bucketsPaths) {
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case 0:
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case 1:
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params["buckets_path"] = a.bucketsPaths[0]
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default:
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params["buckets_path"] = a.bucketsPaths
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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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