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
|
package handlers
import (
"sync/atomic"
"time"
"github.com/mimecast/dtail/internal/io/line"
"github.com/mimecast/dtail/internal/mapr/server"
)
type readCommandServer interface {
LogContext() interface{}
SendServerMessage(message string)
CanReadFile(path string) bool
ServerMessagesChannel() chan string
CatLimiter() chan struct{}
TailLimiter() chan struct{}
Hostname() string
PlainOutput() bool
Serverless() bool
TurboBoostDisabled() bool
HasRegularAggregate() bool
RegisterAggregateLines(lines chan *line.Line)
SharedLinesChannel() chan *line.Line
TurboAggregate() *server.TurboAggregate
AddPendingFiles(delta int32) int32
CompletePendingFile() (remaining int32, activeCommands int32)
PendingAndActive() (pending int32, activeCommands int32)
TriggerShutdown()
IsTurboMode() bool
EnableTurboMode()
HasTurboEOF() bool
FlushTurboData()
SignalTurboEOF()
GetTurboChannel() chan []byte
TurboChannelLen() int
WaitForTurboEOFAck(timeout time.Duration) bool
ReadGlobRetryInterval() time.Duration
ReadRetryInterval() time.Duration
AggregateLinesChannelBufferSize() int
TurboDataTransmissionDelay() time.Duration
TurboEOFWaitDuration(fileCount int) time.Duration
ShutdownTurboSerializeWait() time.Duration
ShutdownIdleRecheckWait() time.Duration
TurboEOFAckTimeout() time.Duration
}
var _ readCommandServer = (*ServerHandler)(nil)
func (h *ServerHandler) LogContext() interface{} {
return h.user
}
func (h *ServerHandler) SendServerMessage(message string) {
h.sendln(h.serverMessages, message)
}
func (h *ServerHandler) CanReadFile(path string) bool {
return h.user.HasFilePermission(path, "readfiles")
}
func (h *ServerHandler) ServerMessagesChannel() chan string {
return h.serverMessages
}
func (h *ServerHandler) CatLimiter() chan struct{} {
return h.catLimiter
}
func (h *ServerHandler) TailLimiter() chan struct{} {
return h.tailLimiter
}
func (h *ServerHandler) Hostname() string {
return h.hostname
}
func (h *ServerHandler) PlainOutput() bool {
return h.plain
}
func (h *ServerHandler) Serverless() bool {
return h.serverless
}
func (h *ServerHandler) TurboBoostDisabled() bool {
return h.serverCfg.TurboBoostDisable
}
func (h *ServerHandler) HasRegularAggregate() bool {
return h.aggregate != nil
}
func (h *ServerHandler) RegisterAggregateLines(lines chan *line.Line) {
if h.aggregate != nil {
h.aggregate.NextLinesCh <- lines
}
}
func (h *ServerHandler) SharedLinesChannel() chan *line.Line {
return h.lines
}
func (h *ServerHandler) TurboAggregate() *server.TurboAggregate {
return h.turboAggregate
}
func (h *ServerHandler) AddPendingFiles(delta int32) int32 {
return atomic.AddInt32(&h.pendingFiles, delta)
}
func (h *ServerHandler) CompletePendingFile() (remaining int32, activeCommands int32) {
remaining = atomic.AddInt32(&h.pendingFiles, -1)
activeCommands = atomic.LoadInt32(&h.activeCommands)
return remaining, activeCommands
}
func (h *ServerHandler) PendingAndActive() (pending int32, activeCommands int32) {
pending = atomic.LoadInt32(&h.pendingFiles)
activeCommands = atomic.LoadInt32(&h.activeCommands)
return pending, activeCommands
}
func (h *ServerHandler) TriggerShutdown() {
h.shutdown()
}
func (h *ServerHandler) FlushTurboData() {
h.flushTurboData()
}
func (h *ServerHandler) TurboEOFAckTimeout() time.Duration {
return durationFromMilliseconds(h.serverCfg.TurboEOFAckTimeoutMs, 2*time.Second)
}
func durationFromMilliseconds(value int, fallback time.Duration) time.Duration {
if value <= 0 {
return fallback
}
return time.Duration(value) * time.Millisecond
}
func positiveIntOrDefault(value int, fallback int) int {
if value <= 0 {
return fallback
}
return value
}
func (h *ServerHandler) ReadGlobRetryInterval() time.Duration {
return durationFromMilliseconds(h.serverCfg.ReadGlobRetryIntervalMs, 5*time.Second)
}
func (h *ServerHandler) ReadRetryInterval() time.Duration {
return durationFromMilliseconds(h.serverCfg.ReadRetryIntervalMs, 2*time.Second)
}
func (h *ServerHandler) AggregateLinesChannelBufferSize() int {
return positiveIntOrDefault(h.serverCfg.ReadAggregateLineBufferSize, 10000)
}
func (h *ServerHandler) TurboDataTransmissionDelay() time.Duration {
return durationFromMilliseconds(h.serverCfg.TurboTransmissionDelayMs, 50*time.Millisecond)
}
func (h *ServerHandler) TurboEOFWaitDuration(fileCount int) time.Duration {
baseWait := durationFromMilliseconds(h.serverCfg.TurboEOFWaitBaseMs, 500*time.Millisecond)
if fileCount <= 10 {
return baseWait
}
perFileWait := durationFromMilliseconds(h.serverCfg.TurboEOFWaitPerFileMs, 10*time.Millisecond)
maxWait := durationFromMilliseconds(h.serverCfg.TurboEOFWaitMaxMs, 2*time.Second)
wait := time.Duration(fileCount) * perFileWait
if wait > maxWait {
return maxWait
}
return wait
}
func (h *ServerHandler) ShutdownTurboSerializeWait() time.Duration {
return durationFromMilliseconds(h.serverCfg.ShutdownTurboSerializeWaitMs, 500*time.Millisecond)
}
func (h *ServerHandler) ShutdownIdleRecheckWait() time.Duration {
return durationFromMilliseconds(h.serverCfg.ShutdownIdleRecheckWaitMs, 10*time.Millisecond)
}
func (h *ServerHandler) turboManagerConfig() turboManagerConfig {
return turboManagerConfig{
channelBufferSize: positiveIntOrDefault(h.serverCfg.TurboChannelBufferSize, defaultTurboChannelBufferSize),
flushTimeout: durationFromMilliseconds(h.serverCfg.TurboFlushTimeoutMs, defaultTurboFlushTimeout),
flushPollInterval: durationFromMilliseconds(h.serverCfg.TurboFlushPollIntervalMs, defaultTurboFlushPollInterval),
readRetryInterval: durationFromMilliseconds(h.serverCfg.TurboReadRetryIntervalMs, defaultTurboReadRetryInterval),
eofAckQuietPeriod: durationFromMilliseconds(h.serverCfg.TurboTransmissionDelayMs, defaultTurboEOFAckQuietPeriod),
}
}
|
