/
encode_prom_metric.go
82 lines (72 loc) · 1.67 KB
/
encode_prom_metric.go
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package encode
import (
"fmt"
"regexp"
"github.com/netobserv/flowlogs-pipeline/pkg/api"
"github.com/netobserv/flowlogs-pipeline/pkg/config"
)
type Predicate func(flow config.GenericMap) bool
type MetricInfo struct {
api.MetricsItem
FilterPredicates []Predicate
}
func Presence(filter api.MetricsFilter) Predicate {
return func(flow config.GenericMap) bool {
_, found := flow[filter.Key]
return found
}
}
func Absence(filter api.MetricsFilter) Predicate {
return func(flow config.GenericMap) bool {
_, found := flow[filter.Key]
return !found
}
}
func Exact(filter api.MetricsFilter) Predicate {
return func(flow config.GenericMap) bool {
if val, found := flow[filter.Key]; found {
sVal, ok := val.(string)
if !ok {
sVal = fmt.Sprint(val)
}
return sVal == filter.Value
}
return false
}
}
func regex(filter api.MetricsFilter) Predicate {
r, _ := regexp.Compile(filter.Value)
return func(flow config.GenericMap) bool {
if val, found := flow[filter.Key]; found {
sVal, ok := val.(string)
if !ok {
sVal = fmt.Sprint(val)
}
return r.MatchString(sVal)
}
return false
}
}
func filterToPredicate(filter api.MetricsFilter) Predicate {
switch filter.Type {
case api.PromFilterExact:
return Exact(filter)
case api.PromFilterPresence:
return Presence(filter)
case api.PromFilterAbsence:
return Absence(filter)
case api.PromFilterRegex:
return regex(filter)
}
// Default = Exact
return Exact(filter)
}
func CreateMetricInfo(def api.MetricsItem) *MetricInfo {
mi := MetricInfo{
MetricsItem: def,
}
for _, f := range def.GetFilters() {
mi.FilterPredicates = append(mi.FilterPredicates, filterToPredicate(f))
}
return &mi
}