github.com/leonlxy/hyperledger@v1.0.0-alpha.0.20170427033203-34922035d248/gossip/util/msgs.go (about) 1 /* 2 Copyright IBM Corp. 2017 All Rights Reserved. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package util 18 19 import ( 20 "sync" 21 22 "github.com/hyperledger/fabric/gossip/common" 23 proto "github.com/hyperledger/fabric/protos/gossip" 24 ) 25 26 // MembershipStore struct which encapsulates 27 // membership message store abstraction 28 type MembershipStore struct { 29 m map[string]*proto.SignedGossipMessage 30 sync.RWMutex 31 } 32 33 // NewMembershipStore creates new membership store instance 34 func NewMembershipStore() *MembershipStore { 35 return &MembershipStore{m: make(map[string]*proto.SignedGossipMessage)} 36 } 37 38 // MsgByID returns a message stored by a certain ID, or nil 39 // if such an ID isn't found 40 func (m *MembershipStore) MsgByID(pkiID common.PKIidType) *proto.SignedGossipMessage { 41 m.RLock() 42 defer m.RUnlock() 43 if msg, exists := m.m[string(pkiID)]; exists { 44 return msg 45 } 46 return nil 47 } 48 49 // Size of the membership store 50 func (m *MembershipStore) Size() int { 51 m.RLock() 52 defer m.RUnlock() 53 return len(m.m) 54 } 55 56 // Put associates msg with the given pkiID 57 func (m *MembershipStore) Put(pkiID common.PKIidType, msg *proto.SignedGossipMessage) { 58 m.Lock() 59 defer m.Unlock() 60 m.m[string(pkiID)] = msg 61 } 62 63 // Remove removes a message with a given pkiID 64 func (m *MembershipStore) Remove(pkiID common.PKIidType) { 65 m.Lock() 66 defer m.Unlock() 67 delete(m.m, string(pkiID)) 68 } 69 70 // ToSlice returns a slice backed by the elements 71 // of the MembershipStore 72 func (m *MembershipStore) ToSlice() []*proto.SignedGossipMessage { 73 m.RLock() 74 defer m.RUnlock() 75 members := make([]*proto.SignedGossipMessage, len(m.m)) 76 i := 0 77 for _, member := range m.m { 78 members[i] = member 79 i++ 80 } 81 return members 82 }