blob: 44b29630367e05c12e41d8307ce89833c0d9d27b (
plain) (
blame)
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
|
package prometheus
import (
"context"
"fmt"
"io"
"github.com/prometheus/common/expfmt"
)
const (
StreamText expfmt.Format = expfmt.FmtText
StreamCompact expfmt.Format = expfmt.FmtProtoCompact
)
func (r *Registry) Stream(_ context.Context, w io.Writer) (int, error) {
metrics, err := r.Gather()
if err != nil {
return 0, fmt.Errorf("cannot gather metrics: %w", err)
}
enc := expfmt.NewEncoder(w, r.streamFormat)
for _, mf := range metrics {
if err := enc.Encode(mf); err != nil {
return 0, fmt.Errorf("cannot encode metric family: %w", err)
}
}
// prometheus encoder does not report how much bytes have been written
// so we indicate it by returning -1 instead
return -1, nil
}
|
