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base.go
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base.go
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// Copyright Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package monitoring
import (
"go.opentelemetry.io/otel/attribute"
"istio.io/istio/pkg/slices"
)
type baseMetric struct {
name string
// attrs stores all attrs for the metrics
attrs []attribute.KeyValue
rest Metric
}
func (f baseMetric) Name() string {
return f.name
}
func (f baseMetric) Increment() {
f.rest.Record(1)
}
func (f baseMetric) Decrement() {
f.rest.Record(-1)
}
func (f baseMetric) runRecordHook(value float64) {
recordHookMutex.RLock()
if rh, ok := recordHooks[f.name]; ok {
lv := slices.Map(f.attrs, func(e attribute.KeyValue) LabelValue {
return LabelValue{e}
})
rh.OnRecord(f.name, lv, value)
}
recordHookMutex.RUnlock()
}
func (f baseMetric) Register() error {
return nil
}
func (f baseMetric) RecordInt(value int64) {
f.rest.Record(float64(value))
}
func rebuildAttributes(bm baseMetric, labelValues []LabelValue) ([]attribute.KeyValue, attribute.Set) {
attrs := make([]attribute.KeyValue, 0, len(bm.attrs)+len(labelValues))
attrs = append(attrs, bm.attrs...)
for _, v := range labelValues {
attrs = append(attrs, v.keyValue)
}
set := attribute.NewSet(attrs...)
return attrs, set
}