go.etcd.io/etcd@v3.3.27+incompatible/etcdserver/api/v3rpc/header.go (about) 1 // Copyright 2016 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 v3rpc 16 17 import ( 18 "github.com/coreos/etcd/etcdserver" 19 pb "github.com/coreos/etcd/etcdserver/etcdserverpb" 20 ) 21 22 type header struct { 23 clusterID int64 24 memberID int64 25 raftTimer etcdserver.RaftTimer 26 rev func() int64 27 } 28 29 func newHeader(s *etcdserver.EtcdServer) header { 30 return header{ 31 clusterID: int64(s.Cluster().ID()), 32 memberID: int64(s.ID()), 33 raftTimer: s, 34 rev: func() int64 { return s.KV().Rev() }, 35 } 36 } 37 38 // fill populates pb.ResponseHeader using etcdserver information 39 func (h *header) fill(rh *pb.ResponseHeader) { 40 if rh == nil { 41 plog.Panic("unexpected nil resp.Header") 42 } 43 rh.ClusterId = uint64(h.clusterID) 44 rh.MemberId = uint64(h.memberID) 45 rh.RaftTerm = h.raftTimer.Term() 46 if rh.Revision == 0 { 47 rh.Revision = h.rev() 48 } 49 }