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
|
package worker
import (
"context"
"errors"
"sync"
"github.com/sirupsen/logrus"
)
type (
// A simple worker to deal with list.
ChanProcessor[T any] interface {
Query(context.Context) (<-chan T, error)
Process(context.Context, T) error
}
OnFail[T any] interface {
OnFail(context.Context, T, error)
}
BatchProcessor[T any] interface {
Query(context.Context) ([]T, error)
Process(context.Context, T) error
}
chanProcessorWorker[T any] struct {
chanProcessor ChanProcessor[T]
logrus *logrus.Entry
scheduler *Scheduler
}
batchProcessorWorker[T any] struct {
batchProcessor BatchProcessor[T]
logrus *logrus.Entry
scheduler *Scheduler
}
)
func NewWorkerFromBatchProcessor[T any](
batchProcessor BatchProcessor[T],
scheduler *Scheduler,
logrus *logrus.Entry,
) Worker {
return &batchProcessorWorker[T]{
batchProcessor: batchProcessor,
scheduler: scheduler,
logrus: logrus,
}
}
func NewWorkerFromChanProcessor[T any](
chanProcessor ChanProcessor[T],
scheduler *Scheduler,
logrus *logrus.Entry,
) Worker {
return &chanProcessorWorker[T]{
chanProcessor: chanProcessor,
scheduler: scheduler,
logrus: logrus,
}
}
func (l *batchProcessorWorker[T]) Start(ctx context.Context) error {
for {
values, err := l.batchProcessor.Query(ctx)
if err != nil {
return err
}
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if len(values) == 0 {
return nil
}
var wg sync.WaitGroup
for _, v := range values {
select {
case <-ctx.Done():
return ctx.Err()
default:
}
wg.Add(1)
l.scheduler.Take()
go func(v T) {
defer l.scheduler.Return()
defer wg.Done()
if err := l.batchProcessor.Process(ctx, v); err != nil && !errors.Is(err, context.Canceled) {
l.logrus.WithError(err).Error("Error processing batch")
if failure, ok := l.batchProcessor.(OnFail[T]); ok {
failure.OnFail(ctx, v, err)
}
}
}(v)
}
wg.Wait()
}
}
func (l *chanProcessorWorker[T]) Start(ctx context.Context) error {
c, err := l.chanProcessor.Query(ctx)
if err != nil {
return err
}
for {
select {
case <-ctx.Done():
return ctx.Err()
case v, ok := <-c:
if !ok {
return nil
}
l.scheduler.Take()
go func(v T) {
defer l.scheduler.Return()
if err := l.chanProcessor.Process(ctx, v); err != nil {
l.logrus.WithError(err).Error("Error processing chan")
}
}(v)
}
}
}
|
