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keepalive.go
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keepalive.go
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// Copyright 2019 Anapaya Systems
//
// 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
//
// http://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 metrics
import (
"github.com/prometheus/client_golang/prometheus"
"github.com/scionproto/scion/go/lib/common"
"github.com/scionproto/scion/go/lib/prom"
)
// KeepaliveLabels is used by clients to pass in a safe way labels
// values to prometheus metric types (e.g. counter).
type KeepaliveLabels struct {
IfID common.IFIDType
Result string
}
// Labels returns the name of the labels in correct order.
func (l KeepaliveLabels) Labels() []string {
return []string{"if_id", prom.LabelResult}
}
// Values returns the values of the label in correct order.
func (l KeepaliveLabels) Values() []string {
return []string{l.IfID.String(), l.Result}
}
type exporter struct {
out, in *prometheus.CounterVec
}
func newKeepalive() exporter {
sub := "keepalive"
labels := KeepaliveLabels{}
return exporter{
out: prom.NewCounterVecWithLabels(Namespace, sub, "sent_msgs_total",
"Total number of sent keepalive msgs.", labels),
in: prom.NewCounterVecWithLabels(Namespace, sub, "received_msgs_total",
"Total number of received keepalive msgs.", labels),
}
}
// Transmits returns transmit counter.
func (e *exporter) Transmits(l KeepaliveLabels) prometheus.Counter {
return e.out.WithLabelValues(l.Values()...)
}
// Receives returns the receive counter.
func (e *exporter) Receives(l KeepaliveLabels) prometheus.Counter {
return e.in.WithLabelValues(l.Values()...)
}