-
Notifications
You must be signed in to change notification settings - Fork 1
/
processor.go
57 lines (49 loc) · 1.25 KB
/
processor.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
package consumer
import (
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/sqs"
"github.com/google/uuid"
"log"
"sync"
)
//Processor defines the struct that processes messages from AWS SQS
type Processor struct {
queueURL string
queue *sqs.SQS
handler func(*sqs.Message) error
}
func (p *Processor) processMessages(messages []*sqs.Message) {
nMessages := len(messages)
deleteChannel := make(chan *string, nMessages)
wg := sync.WaitGroup{}
wg.Add(nMessages)
for _, m := range messages {
go func(message *sqs.Message) {
defer wg.Done()
err := p.handler(message)
if err != nil {
log.Println("Error while handling message:", err)
return
}
deleteChannel <- message.ReceiptHandle
}(m)
}
wg.Wait()
close(deleteChannel)
entries := make([]*sqs.DeleteMessageBatchRequestEntry, 0, nMessages)
for receipt := range deleteChannel {
entries = append(entries, &sqs.DeleteMessageBatchRequestEntry{
Id: aws.String(uuid.NewString()),
ReceiptHandle: receipt,
})
}
if len(entries) > 0 {
_, dErr := p.queue.DeleteMessageBatch(&sqs.DeleteMessageBatchInput{
QueueUrl: &p.queueURL,
Entries: entries,
})
if dErr != nil {
log.Println("Failed while trying to delete message:", dErr)
}
}
}