go.etcd.io/etcd@v3.3.27+incompatible/rafthttp/peer_status.go (about)

     1  // Copyright 2015 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package rafthttp
    16  
    17  import (
    18  	"fmt"
    19  	"sync"
    20  	"time"
    21  
    22  	"github.com/coreos/etcd/pkg/types"
    23  )
    24  
    25  type failureType struct {
    26  	source string
    27  	action string
    28  }
    29  
    30  type peerStatus struct {
    31  	id     types.ID
    32  	mu     sync.Mutex // protect variables below
    33  	active bool
    34  	since  time.Time
    35  }
    36  
    37  func newPeerStatus(id types.ID) *peerStatus {
    38  	return &peerStatus{
    39  		id: id,
    40  	}
    41  }
    42  
    43  func (s *peerStatus) activate() {
    44  	s.mu.Lock()
    45  	defer s.mu.Unlock()
    46  	if !s.active {
    47  		plog.Infof("peer %s became active", s.id)
    48  		s.active = true
    49  		s.since = time.Now()
    50  	}
    51  }
    52  
    53  func (s *peerStatus) deactivate(failure failureType, reason string) {
    54  	s.mu.Lock()
    55  	defer s.mu.Unlock()
    56  	msg := fmt.Sprintf("failed to %s %s on %s (%s)", failure.action, s.id, failure.source, reason)
    57  	if s.active {
    58  		plog.Errorf(msg)
    59  		plog.Infof("peer %s became inactive (message send to peer failed)", s.id)
    60  		s.active = false
    61  		s.since = time.Time{}
    62  		return
    63  	}
    64  	plog.Debugf(msg)
    65  }
    66  
    67  func (s *peerStatus) isActive() bool {
    68  	s.mu.Lock()
    69  	defer s.mu.Unlock()
    70  	return s.active
    71  }
    72  
    73  func (s *peerStatus) activeSince() time.Time {
    74  	s.mu.Lock()
    75  	defer s.mu.Unlock()
    76  	return s.since
    77  }