/
metrics.go
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/
metrics.go
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// Copyright (c) 2019 Uber Technologies, Inc.
//
// 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 leader
import (
"github.com/uber-go/tally"
)
type electionMetrics struct {
Start tally.Counter
Stop tally.Counter
Resigned tally.Counter
LostLeadership tally.Counter
GainedLeadership tally.Counter
IsLeader tally.Gauge
Running tally.Gauge
Error tally.Counter
}
type observerMetrics struct {
Start tally.Counter
Stop tally.Counter
LeaderChanged tally.Counter
Running tally.Gauge
Error tally.Counter
}
//TODO(rcharles) replace tag hostname with instanceNumber
func newElectionMetrics(scope tally.Scope, hostname string) electionMetrics {
s := scope.Tagged(map[string]string{"hostname": hostname})
return electionMetrics{
Start: s.Counter("start"),
Stop: s.Counter("stop"),
Resigned: s.Counter("resigned"),
LostLeadership: s.Counter("lost_leadership"),
GainedLeadership: s.Counter("gained_leadership"),
IsLeader: s.Gauge("is_leader"),
Running: s.Gauge("running"),
Error: s.Counter("error"),
}
}
func newObserverMetrics(scope tally.Scope, role string) observerMetrics {
s := scope.Tagged(map[string]string{"role": role})
return observerMetrics{
Start: s.Counter("start"),
Stop: s.Counter("stop"),
LeaderChanged: s.Counter("leader_changed"),
Running: s.Gauge("running"),
Error: s.Counter("error"),
}
}