github.com/adnan-c/fabric_e2e_couchdb@v0.6.1-preview.0.20170228180935-21ce6b23cf91/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  type MembershipStore struct {
    27  	m map[string]*proto.SignedGossipMessage
    28  	sync.RWMutex
    29  }
    30  
    31  func NewMembershipStore() *MembershipStore {
    32  	return &MembershipStore{m: make(map[string]*proto.SignedGossipMessage)}
    33  }
    34  
    35  // msgByID returns a message stored by a certain ID, or nil
    36  // if such an ID isn't found
    37  func (m *MembershipStore) MsgByID(pkiID common.PKIidType) *proto.SignedGossipMessage {
    38  	m.RLock()
    39  	defer m.RUnlock()
    40  	if msg, exists := m.m[string(pkiID)]; exists {
    41  		return msg
    42  	}
    43  	return nil
    44  }
    45  
    46  func (m *MembershipStore) Size() int {
    47  	m.RLock()
    48  	defer m.RUnlock()
    49  	return len(m.m)
    50  }
    51  
    52  // Put associates msg with the given pkiID
    53  func (m *MembershipStore) Put(pkiID common.PKIidType, msg *proto.SignedGossipMessage) {
    54  	m.Lock()
    55  	defer m.Unlock()
    56  	m.m[string(pkiID)] = msg
    57  }
    58  
    59  // Remove removes a message with a given pkiID
    60  func (m *MembershipStore) Remove(pkiID common.PKIidType) {
    61  	m.Lock()
    62  	defer m.Unlock()
    63  	delete(m.m, string(pkiID))
    64  }
    65  
    66  // ToSlice returns a slice backed by the elements
    67  // of the MembershipStore
    68  func (m *MembershipStore) ToSlice() []*proto.SignedGossipMessage {
    69  	m.RLock()
    70  	defer m.RUnlock()
    71  	members := make([]*proto.SignedGossipMessage, len(m.m))
    72  	i := 0
    73  	for _, member := range m.m {
    74  		members[i] = member
    75  		i++
    76  	}
    77  	return members
    78  }