-
Notifications
You must be signed in to change notification settings - Fork 0
/
updates.go
67 lines (58 loc) · 1.2 KB
/
updates.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
package vivoupdater
import (
"context"
"log"
"time"
)
type UpdateSubscriber interface {
MaxConnectAttempts() int
RetryInterval() int
}
type Indexer interface {
Name() string
}
type Triple struct {
Subject string
Predicate string
Object string
}
type UpdateMessage struct {
Type string
Phase string
Name string
Triple Triple
// TODO: add a retry, attempts (int) type of flag?
}
type UriBatcher struct {
BatchSize int
BatchTimeout time.Duration
}
func (ub UriBatcher) Batch(ctx context.Context, logger *log.Logger,
updates chan UpdateMessage, quit chan bool) chan map[string]bool {
batches := make(chan map[string]bool)
go func() {
batch := make(map[string]bool, ub.BatchSize)
BatchLoop:
for {
timer := time.NewTimer(ub.BatchTimeout)
select {
case u := <-updates:
timer.Stop()
batch[u.Triple.Subject] = true
if len(batch) == ub.BatchSize {
batches <- batch
batch = make(map[string]bool, ub.BatchSize)
}
case <-timer.C:
if len(batch) > 0 {
batches <- batch
batch = make(map[string]bool, ub.BatchSize)
}
case <-quit:
logger.Println("vivoupdater batcher received quit=true")
break BatchLoop
}
}
}()
return batches
}