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// Copyright 2015 The etcd 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
//
// 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 rafthttp
import (
"errors"
"fmt"
"sync"
"time"
"go.etcd.io/etcd/client/pkg/v3/types"
"go.uber.org/zap"
)
type failureType struct {
source string
action string
}
type peerStatus struct {
lg *zap.Logger
local types.ID
id types.ID
mu sync.Mutex // protect variables below
active bool
since time.Time
}
func newPeerStatus(lg *zap.Logger, local, id types.ID) *peerStatus {
if lg == nil {
lg = zap.NewNop()
}
return &peerStatus{lg: lg, local: local, id: id}
}
func (s *peerStatus) activate() {
s.mu.Lock()
defer s.mu.Unlock()
if !s.active {
s.lg.Info("peer became active", zap.String("peer-id", s.id.String()))
s.active = true
s.since = time.Now()
activePeers.WithLabelValues(s.local.String(), s.id.String()).Inc()
}
}
func (s *peerStatus) deactivate(failure failureType, reason string) {
s.mu.Lock()
defer s.mu.Unlock()
msg := fmt.Sprintf("failed to %s %s on %s (%s)", failure.action, s.id, failure.source, reason)
if s.active {
s.lg.Warn("peer became inactive (message send to peer failed)", zap.String("peer-id", s.id.String()), zap.Error(errors.New(msg)))
s.active = false
s.since = time.Time{}
activePeers.WithLabelValues(s.local.String(), s.id.String()).Dec()
disconnectedPeers.WithLabelValues(s.local.String(), s.id.String()).Inc()
return
}
if s.lg != nil {
s.lg.Debug("peer deactivated again", zap.String("peer-id", s.id.String()), zap.Error(errors.New(msg)))
}
}
func (s *peerStatus) isActive() bool {
s.mu.Lock()
defer s.mu.Unlock()
return s.active
}
func (s *peerStatus) activeSince() time.Time {
s.mu.Lock()
defer s.mu.Unlock()
return s.since
}
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