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Add example to topk readme. Fix defaults to skip loop (#5220)

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This commit is contained in:
Greg
2019-01-03 13:06:56 -07:00
committed by Daniel Nelson
parent 10b2260daf
commit 3c4e737f6b
2 changed files with 39 additions and 7 deletions
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13
plugins/processors/topk/topk.go
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@@ -43,8 +43,8 @@ func New() *TopK {
topk.Aggregation = "mean"
topk.GroupBy = []string{"*"}
topk.AddGroupByTag = ""
topk.AddRankFields = []string{""}
topk.AddAggregateFields = []string{""}
topk.AddRankFields = []string{}
topk.AddAggregateFields = []string{}
// Initialize cache
topk.Reset()
@@ -203,7 +203,9 @@ func (t *TopK) Apply(in ...telegraf.Metric) []telegraf.Metric {
if t.aggFieldSet == nil {
t.aggFieldSet = make(map[string]bool)
for _, f := range t.AddAggregateFields {
t.aggFieldSet[f] = true
if f != "" {
t.aggFieldSet[f] = true
}
}
}
@@ -279,7 +281,6 @@ func (t *TopK) push() []telegraf.Metric {
// Get the top K metrics for each field and add them to the return value
addedKeys := make(map[string]bool)
groupTag := t.AddGroupByTag
for _, field := range t.Fields {
// Sort the aggregations
@@ -288,9 +289,8 @@ func (t *TopK) push() []telegraf.Metric {
// Create a one dimensional list with the top K metrics of each key
for i, ag := range aggregations[0:min(t.K, len(aggregations))] {
// Check whether of not we need to add fields of tags to the selected metrics
if len(t.aggFieldSet) != 0 || len(t.rankFieldSet) != 0 || groupTag != "" {
if len(t.aggFieldSet) != 0 || len(t.rankFieldSet) != 0 || t.AddGroupByTag != "" {
for _, m := range t.cache[ag.groupbykey] {
// Add the aggregation final value if requested
_, addAggField := t.aggFieldSet[field]
if addAggField && m.HasField(field) {
@@ -330,7 +330,6 @@ func (t *TopK) push() []telegraf.Metric {
// Function that generates the aggregation functions
func (t *TopK) getAggregationFunction(aggOperation string) (func([]telegraf.Metric, []string) map[string]float64, error) {
// This is a function aggregates a set of metrics using a given aggregation function
var aggregator = func(ms []telegraf.Metric, fields []string, f func(map[string]float64, float64, string)) map[string]float64 {
agg := make(map[string]float64)