-
Notifications
You must be signed in to change notification settings - Fork 0
/
gortinep.go
242 lines (195 loc) · 4.16 KB
/
gortinep.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
package gortinep
import (
"context"
"os"
"os/signal"
"sync"
"sync/atomic"
"syscall"
"time"
)
const (
// DefaultWorkerSize is default worker size.
DefaultWorkerSize = 128
// DefaultJobSize is default job size.
DefaultJobSize = 100000000
)
// Gortinep is base gortinep interface.
type Gortinep interface {
Add(Job)
Start(context.Context) Gortinep
Stop() Gortinep
Wait() chan error
}
type (
gortinep struct {
running bool
workerSize int
jobSize int
workers []*worker
workerWg *sync.WaitGroup
jobWg *sync.WaitGroup
jobCh chan Job
sigDoneCh chan struct{}
jobError *jobError
interceptor Interceptor
cancel context.CancelFunc
}
worker struct {
gp *gortinep
running int64
}
jobError struct {
ch chan error
closed bool
mu *sync.Mutex
}
)
func newDefaultJobError() *jobError {
return &jobError{
ch: make(chan error),
closed: false,
mu: new(sync.Mutex),
}
}
func (e *jobError) close() {
e.mu.Lock()
defer e.mu.Unlock()
if e.closed {
return
}
close(e.ch)
e.closed = true
}
func (e *jobError) open() {
e.mu.Lock()
defer e.mu.Unlock()
if !e.closed {
return
}
e.ch = make(chan error, cap(e.ch))
e.closed = false
}
// New creates Gortinep(*gortinep) instance.
func New(opts ...Option) Gortinep {
gp := newDefaultGortinep()
for _, opt := range opts {
opt(gp)
}
for i := 0; i < gp.workerSize; i++ {
gp.workers[i] = newDefaultWorker(gp)
}
return gp
}
func newDefaultGortinep() *gortinep {
return &gortinep{
running: false,
workerSize: DefaultWorkerSize,
jobSize: DefaultJobSize,
workers: make([]*worker, DefaultWorkerSize),
workerWg: new(sync.WaitGroup),
jobWg: new(sync.WaitGroup),
jobCh: make(chan Job, DefaultJobSize),
sigDoneCh: make(chan struct{}),
jobError: newDefaultJobError(),
interceptor: nopInterceptor,
}
}
func newDefaultWorker(gp *gortinep) *worker {
return &worker{
gp: gp,
running: 0,
}
}
// Start starts all goroutine pool with context.
func (gp *gortinep) Start(ctx context.Context) Gortinep {
if gp.running {
return gp
}
ctx, gp.cancel = context.WithCancel(ctx)
go gp.watchShutdownSignal(gp.sigDoneCh, gp.cancel)
for _, worker := range gp.workers {
if atomic.LoadInt64(&worker.running) == 0 {
gp.workerWg.Add(1)
go worker.start(ctx)
}
}
gp.running = true
return gp
}
func (gp *gortinep) watchShutdownSignal(sigDoneCh chan struct{}, cancel context.CancelFunc) {
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
defer func() {
signal.Stop(sigCh)
close(sigCh)
}()
for {
select {
case <-gp.sigDoneCh:
return
case <-sigCh:
cancel()
gp.workerWg.Wait()
}
}
}
// Stop stops all goroutine pool.
// If job is being executed in goroutine pool, wait until it is finished and stop the groutine pool.
func (gp *gortinep) Stop() Gortinep {
if !gp.running {
return gp
}
gp.cancel()
gp.workerWg.Wait()
gp.running = false
gp.sigDoneCh <- struct{}{}
return gp
}
// Add adds job into gorutine pool. job is processed asynchronously.
func (gp *gortinep) Add(job Job) {
if gp.jobError != nil {
gp.jobError.open()
}
gp.jobCh <- job
}
// Wait return error channel for job error processed by goroutine worker.
// If the error channel is not set, wait for all jobs to end and return.
func (gp *gortinep) Wait() chan error {
// If `Wait` method is called immediately after `Add` method, wait a little because job may be called before registration.
time.Sleep(1 * time.Second)
if gp.jobError == nil {
gp.jobWg.Wait()
return nil
}
go func() {
gp.jobWg.Wait()
gp.jobError.close()
}()
return gp.jobError.ch
}
func (w *worker) start(ctx context.Context) {
atomic.AddInt64(&w.running, 1)
defer func() {
atomic.StoreInt64(&w.running, 0)
w.gp.workerWg.Done()
}()
for {
select {
case <-ctx.Done():
return
case j := <-w.gp.jobCh:
w.gp.jobWg.Add(1)
// Send job error to channel.
// If error channel is nil, do nothing.
w.sendJobError(w.gp.interceptor(ctx, j))
w.gp.jobWg.Done()
}
}
}
func (w *worker) sendJobError(err error) {
if w.gp.jobError == nil {
return
}
w.gp.jobError.ch <- err
}