/
artifactmanager_senders.go
140 lines (117 loc) · 3.67 KB
/
artifactmanager_senders.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
/*
* Copyright 2019 Insolar Technologies
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package artifactmanager
import (
"context"
"sync"
"github.com/insolar/insolar/core"
"github.com/insolar/insolar/core/message"
"github.com/insolar/insolar/core/reply"
"github.com/insolar/insolar/instrumentation/inslogger"
"github.com/insolar/insolar/ledger/storage"
"github.com/pkg/errors"
"go.opencensus.io/stats"
)
// ledgerArtifactSenders is a some kind of a middleware layer
// it contains cache meta-data for calls
type ledgerArtifactSenders struct {
cacheLock sync.Mutex
caches map[string]*cacheEntry
}
type cacheEntry struct {
sync.Mutex
reply core.Reply
}
func newLedgerArtifactSenders() *ledgerArtifactSenders {
return &ledgerArtifactSenders{
caches: map[string]*cacheEntry{},
}
}
// cachedSender is using for caching replies
func (m *ledgerArtifactSenders) cachedSender(scheme core.PlatformCryptographyScheme) PreSender {
return func(sender Sender) Sender {
return func(ctx context.Context, msg core.Message, options *core.MessageSendOptions) (core.Reply, error) {
msgHash := string(scheme.IntegrityHasher().Hash(message.ToBytes(msg)))
m.cacheLock.Lock()
entry, ok := m.caches[msgHash]
if !ok {
entry = &cacheEntry{}
m.caches[msgHash] = entry
}
m.cacheLock.Unlock()
entry.Lock()
defer entry.Unlock()
if entry.reply != nil {
return entry.reply, nil
}
response, err := sender(ctx, msg, options)
if err != nil {
return nil, err
}
entry.reply = response
return response, err
}
}
}
// followRedirectSender is using for redirecting responses with delegation token
func followRedirectSender(bus core.MessageBus) PreSender {
return func(sender Sender) Sender {
return func(ctx context.Context, msg core.Message, options *core.MessageSendOptions) (core.Reply, error) {
rep, err := sender(ctx, msg, options)
if err != nil {
return nil, err
}
if r, ok := rep.(core.RedirectReply); ok {
stats.Record(ctx, statRedirects.M(1))
redirected := r.Redirected(msg)
inslogger.FromContext(ctx).Debugf("redirect reciever=%v", r.GetReceiver())
rep, err = bus.Send(ctx, redirected, &core.MessageSendOptions{
Token: r.GetToken(),
Receiver: r.GetReceiver(),
})
if err != nil {
return nil, err
}
if _, ok := rep.(core.RedirectReply); ok {
return nil, errors.New("double redirects are forbidden")
}
return rep, nil
}
return rep, err
}
}
}
// retryJetSender is using for refreshing jet-tree, if destination has no idea about a jet from message
func retryJetSender(jetStorage storage.JetStorage) PreSender {
return func(sender Sender) Sender {
return func(ctx context.Context, msg core.Message, options *core.MessageSendOptions) (core.Reply, error) {
retries := jetMissRetryCount
for retries > 0 {
rep, err := sender(ctx, msg, options)
if err != nil {
return nil, err
}
if r, ok := rep.(*reply.JetMiss); ok {
jetStorage.UpdateJetTree(ctx, r.Pulse, true, r.JetID)
} else {
return rep, err
}
retries--
}
return nil, errors.New("failed to find jet (retry limit exceeded on client)")
}
}
}