-
Notifications
You must be signed in to change notification settings - Fork 0
/
selectionfilter.go
256 lines (213 loc) · 7.42 KB
/
selectionfilter.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
/*
Copyright SecureKey Technologies Inc. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package fabricselection
import (
"context"
"sort"
discclient "github.com/hellobchain/fabric-sdk-go/internal/github.com/hyperledger/fabric/discovery/client"
"github.com/hellobchain/fabric-sdk-go/pkg/client/common/selection/balancer"
"github.com/hellobchain/fabric-sdk-go/pkg/client/common/selection/options"
"github.com/hellobchain/fabric-sdk-go/pkg/client/common/selection/sorter/balancedsorter"
"github.com/hellobchain/fabric-sdk-go/pkg/client/common/selection/sorter/blockheightsorter"
contextAPI "github.com/hellobchain/fabric-sdk-go/pkg/common/providers/context"
"github.com/hellobchain/fabric-sdk-go/pkg/common/providers/fab"
fabdiscovery "github.com/hellobchain/fabric-sdk-go/pkg/fab/discovery"
)
type selectionFilter struct {
ctx contextAPI.Client
peers []fab.Peer
filter options.PeerFilter
sorter options.PeerSorter
}
var noFilter = func(fab.Peer) bool {
return true
}
func newFilter(ctx contextAPI.Client, peers []fab.Peer, filter options.PeerFilter, sorter options.PeerSorter) *selectionFilter {
if filter == nil {
filter = noFilter
}
return &selectionFilter{
ctx: ctx,
peers: peers,
filter: filter,
sorter: sorter,
}
}
func resolvePeerSorter(channelID string, ctx contextAPI.Client) options.PeerSorter {
channelConfig := ctx.EndpointConfig().ChannelConfig(channelID)
return resolveSortingStrategy(channelID, channelConfig, resolveBalancer(channelID, channelConfig))
}
func resolveSortingStrategy(channelID string, channelConfig *fab.ChannelEndpointConfig, balancer balancer.Balancer) options.PeerSorter {
switch channelConfig.Policies.Selection.SortingStrategy {
case fab.Balanced:
logger.Debugf("Using balanced selection sorter for channel [%s]", channelID)
return balancedsorter.New(balancedsorter.WithBalancer(balancer))
default:
logger.Debugf("Using block height priority selection sorter for channel [%s]", channelID)
return blockheightsorter.New(blockheightsorter.WithBalancer(balancer))
}
}
func resolveBalancer(channelID string, channelConfig *fab.ChannelEndpointConfig) balancer.Balancer {
switch channelConfig.Policies.Selection.Balancer {
case fab.Random:
logger.Debugf("Using random selection balancer for channel [%s]", channelID)
return balancer.Random()
default:
logger.Debugf("Using round-robin selection balancer for channel [%s]", channelID)
return balancer.RoundRobin()
}
}
func (s *selectionFilter) Filter(endorsers discclient.Endorsers) discclient.Endorsers {
// Convert the endorsers to peers
peers := s.asPeerValues(endorsers)
// Sort the peers in alphabetical order so that they are always presented to the balancer in the same order
peers = s.sortByURL(peers)
// Filter out the peers that weren't included in the list of discovered peers
discoveredPeers := s.filterDiscovered(peers)
// Apply the peer filter (if any)
filteredPeers := s.filterPeers(discoveredPeers)
// Apply the peer sorter (if any)
sortedPeers := s.sortPeers(filteredPeers)
// Convert the filtered peers to endorsers
return s.asEndorsers(endorsers, sortedPeers)
}
func (s *selectionFilter) sortPeers(peers []fab.Peer) []fab.Peer {
if s.sorter == nil {
return peers
}
logger.Debugf("Sorting peers")
return s.sorter(peers)
}
func (s *selectionFilter) filterPeers(peers []fab.Peer) []fab.Peer {
if s.filter == nil {
return peers
}
var filteredPeers []fab.Peer
for _, peer := range peers {
// Apply the PeerFilter (if any)
if s.filter(peer) {
logger.Debugf("Including peer [%s] since it was included by the peer filter", peer.URL())
filteredPeers = append(filteredPeers, peer)
} else {
logger.Debugf("Excluding peer [%s] since it was excluded by the peer filter", peer.URL())
}
}
return filteredPeers
}
func (s *selectionFilter) filterDiscovered(peers []fab.Peer) []fab.Peer {
// The peer must be included in the set of peers returned from fab.DiscoveryService.
// (Note that DiscoveryService may return a filtered set of peers, depending on how the
// SDK was configured, so we need to exclude those peers from selection.)
var discoveryPeers []fab.Peer
for _, peer := range peers {
if containsPeer(s.peers, peer) {
logger.Debugf("Including peer [%s] since it is in the set of peers returned by the discovery service", peer.URL())
discoveryPeers = append(discoveryPeers, peer)
} else {
logger.Debugf("Excluding peer [%s] since it isn't in the set of peers returned by the discovery service", peer.URL())
}
}
return discoveryPeers
}
// asPeerValue converts the discovery endpoint into a light-weight peer value (i.e. without the GRPC config)
// so that it may used by a peer filter
func (s *selectionFilter) asPeerValue(endpoint *discclient.Peer) fab.Peer {
url := endpoint.AliveMessage.GetAliveMsg().GetMembership().Endpoint
// Get the mapped URL of the peer
peerConfig, found := s.ctx.EndpointConfig().PeerConfig(url)
if found {
url = peerConfig.URL
} else {
logger.Debugf("Peer config not found for url [%s]", url)
}
return &peerEndpointValue{
mspID: endpoint.MSPID,
url: url,
properties: fabdiscovery.GetProperties(endpoint),
}
}
func (s *selectionFilter) asPeerValues(endorsers discclient.Endorsers) []fab.Peer {
var peers []fab.Peer
for _, endorser := range endorsers {
peer := s.asPeerValue(endorser)
logger.Debugf("Adding peer [%s]", peer.URL())
peers = append(peers, peer)
}
return peers
}
func (s *selectionFilter) sortByURL(peers []fab.Peer) []fab.Peer {
sort.Sort(&peerSorter{
peers: peers,
})
return peers
}
func (s *selectionFilter) asEndorsers(allEndorsers discclient.Endorsers, filteredPeers []fab.Peer) discclient.Endorsers {
var filteredEndorsers discclient.Endorsers
for _, peer := range filteredPeers {
endorser, found := s.asEndorser(allEndorsers, peer)
if !found {
// This should never happen since the peer was composed from the initial list of endorsers
logger.Warnf("Endorser [%s] not found. Endorser will be excluded.", peer.URL())
continue
}
logger.Debugf("Adding endorser [%s]", peer.URL())
filteredEndorsers = append(filteredEndorsers, endorser)
}
return filteredEndorsers
}
func (s *selectionFilter) asEndorser(endorsers discclient.Endorsers, peer fab.Peer) (*discclient.Peer, bool) {
for _, endorser := range endorsers {
url := s.asPeerValue(endorser).URL()
if peer.URL() == url {
return endorser, true
}
}
return nil, false
}
func containsPeer(peers []fab.Peer, peer fab.Peer) bool {
for _, p := range peers {
if p.URL() == peer.URL() {
return true
}
}
return false
}
type peerEndpointValue struct {
mspID string
url string
properties fab.Properties
}
func (p *peerEndpointValue) MSPID() string {
return p.mspID
}
func (p *peerEndpointValue) URL() string {
return p.url
}
func (p *peerEndpointValue) Properties() fab.Properties {
return p.properties
}
func (p *peerEndpointValue) BlockHeight() uint64 {
ledgerHeight, ok := p.properties[fab.PropertyLedgerHeight]
if !ok {
return 0
}
return ledgerHeight.(uint64)
}
func (p *peerEndpointValue) ProcessTransactionProposal(context.Context, fab.ProcessProposalRequest) (*fab.TransactionProposalResponse, error) {
panic("not implemented")
}
type peers []fab.Peer
type peerSorter struct {
peers
}
func (es *peerSorter) Len() int {
return len(es.peers)
}
func (es *peerSorter) Less(i, j int) bool {
return es.peers[i].URL() < es.peers[j].URL()
}
func (es *peerSorter) Swap(i, j int) {
es.peers[i], es.peers[j] = es.peers[j], es.peers[i]
}