-
Notifications
You must be signed in to change notification settings - Fork 661
/
manager.go
189 lines (157 loc) · 4.91 KB
/
manager.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
// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package uptime
import (
"time"
"github.com/ava-labs/avalanchego/database"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/utils/timer"
)
var _ TestManager = &manager{}
type State interface {
GetUptime(nodeID ids.ShortID) (upDuration time.Duration, lastUpdated time.Time, err error)
SetUptime(nodeID ids.ShortID, upDuration time.Duration, lastUpdated time.Time) error
}
type Manager interface {
// Should only be called once
StartTracking(nodeIDs []ids.ShortID) error
// Should only be called once
Shutdown(nodeIDs []ids.ShortID) error
Connect(nodeID ids.ShortID) error
IsConnected(nodeID ids.ShortID) bool
Disconnect(nodeID ids.ShortID) error
CalculateUptime(nodeID ids.ShortID) (time.Duration, time.Time, error)
CalculateUptimePercent(nodeID ids.ShortID, startTime time.Time) (float64, error)
}
type TestManager interface {
Manager
SetTime(time.Time)
}
type manager struct {
// Used to get time. Useful for faking time during tests.
clock timer.Clock
state State
connections map[ids.ShortID]time.Time
startedTracking bool
}
func NewManager(state State) Manager {
return &manager{
state: state,
connections: make(map[ids.ShortID]time.Time),
}
}
func (m *manager) StartTracking(nodeIDs []ids.ShortID) error {
currentLocalTime := m.clock.Time()
for _, nodeID := range nodeIDs {
upDuration, lastUpdated, err := m.state.GetUptime(nodeID)
if err != nil {
return err
}
// If we are in a weird reality where time has moved backwards, then we
// shouldn't modify the validator's uptime.
if currentLocalTime.Before(lastUpdated) {
continue
}
durationOffline := currentLocalTime.Sub(lastUpdated)
newUpDuration := upDuration + durationOffline
if err := m.state.SetUptime(nodeID, newUpDuration, currentLocalTime); err != nil {
return err
}
}
m.startedTracking = true
return nil
}
func (m *manager) Shutdown(nodeIDs []ids.ShortID) error {
currentLocalTime := m.clock.Time()
for _, nodeID := range nodeIDs {
if _, connected := m.connections[nodeID]; connected {
if err := m.Disconnect(nodeID); err != nil {
return err
}
continue
}
upDuration, lastUpdated, err := m.state.GetUptime(nodeID)
if err != nil {
return err
}
// If we are in a weird reality where time has moved backwards, then we
// shouldn't modify the validator's uptime.
if currentLocalTime.Before(lastUpdated) {
continue
}
if err := m.state.SetUptime(nodeID, upDuration, currentLocalTime); err != nil {
return err
}
}
return nil
}
func (m *manager) Connect(nodeID ids.ShortID) error {
m.connections[nodeID] = m.clock.Time()
return nil
}
func (m *manager) IsConnected(nodeID ids.ShortID) bool {
_, connected := m.connections[nodeID]
return connected
}
func (m *manager) Disconnect(nodeID ids.ShortID) error {
if !m.startedTracking {
delete(m.connections, nodeID)
return nil
}
newDuration, newLastUpdated, err := m.CalculateUptime(nodeID)
delete(m.connections, nodeID)
if err == database.ErrNotFound {
// If a non-validator disconnects, we don't care
return nil
}
if err != nil {
return err
}
return m.state.SetUptime(nodeID, newDuration, newLastUpdated)
}
func (m *manager) CalculateUptime(nodeID ids.ShortID) (time.Duration, time.Time, error) {
upDuration, lastUpdated, err := m.state.GetUptime(nodeID)
if err != nil {
return 0, time.Time{}, err
}
currentLocalTime := m.clock.Time()
// If we are in a weird reality where time has gone backwards, make sure
// that we don't double count or delete any uptime.
if currentLocalTime.Before(lastUpdated) {
return upDuration, lastUpdated, nil
}
timeConnected, isConnected := m.connections[nodeID]
if !isConnected {
return upDuration, currentLocalTime, nil
}
// The time the peer connected needs to be adjusted to ensure no time period
// is double counted.
if timeConnected.Before(lastUpdated) {
timeConnected = lastUpdated
}
// If we are in a weird reality where time has gone backwards, make sure
// that we don't double count or delete any uptime.
if currentLocalTime.Before(timeConnected) {
return upDuration, currentLocalTime, nil
}
// Increase the uptimes by the amount of time this node has been running
// since the last time it's uptime was written to disk.
durationConnected := currentLocalTime.Sub(timeConnected)
newUpDuration := upDuration + durationConnected
return newUpDuration, currentLocalTime, nil
}
func (m *manager) CalculateUptimePercent(nodeID ids.ShortID, startTime time.Time) (float64, error) {
upDuration, currentLocalTime, err := m.CalculateUptime(nodeID)
if err != nil {
return 0, err
}
bestPossibleUpDuration := currentLocalTime.Sub(startTime)
if bestPossibleUpDuration == 0 {
return 1, nil
}
uptime := float64(upDuration) / float64(bestPossibleUpDuration)
return uptime, nil
}
func (m *manager) SetTime(newTime time.Time) {
m.clock.Set(newTime)
}