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
|
package readcloserwithmetrics
import (
"fmt"
"github.com/aws/aws-sdk-go-v2/aws/middleware/private/metrics"
"github.com/aws/aws-sdk-go-v2/internal/sdk"
"io"
)
type ReadCloserWithMetrics struct {
data *metrics.MetricData
publisher metrics.MetricPublisher
readCloser io.ReadCloser
readFinished bool
}
func New(
context *metrics.MetricContext, closer io.ReadCloser,
) (trc *ReadCloserWithMetrics) {
return &ReadCloserWithMetrics{
data: context.Data(),
publisher: context.Publisher(),
readCloser: closer,
readFinished: false,
}
}
func (r *ReadCloserWithMetrics) Read(p []byte) (n int, err error) {
readRoundStarted := sdk.NowTime()
read, err := r.readCloser.Read(p)
readRoundEnd := sdk.NowTime()
r.data.Stream.ReadDuration += readRoundEnd.Sub(readRoundStarted)
r.data.Stream.ReadBytes += int64(read)
if err == io.EOF {
r.readFinished = true
r.finalize()
}
return read, err
}
func (r *ReadCloserWithMetrics) Close() error {
if !r.readFinished {
r.finalize()
}
return r.readCloser.Close()
}
func (r *ReadCloserWithMetrics) finalize() {
if r.data.Stream.ReadDuration > 0 {
r.data.Stream.Throughput = float64(r.data.Stream.ReadBytes) / r.data.Stream.ReadDuration.Seconds()
}
err := r.publisher.PostStreamMetrics(r.data)
if err != nil {
fmt.Println("Failed to post stream metrics")
}
}
|
