47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
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package adapter
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import (
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"bytes"
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"context"
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"encoding/json"
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"net/http"
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"time"
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)
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// HTTPTelemetry POSTs to the control plane, per docs/adapter-contract.md.
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// It must never carry subscriber identity or post body text; callers control
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// that by what they put in fields.
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type HTTPTelemetry struct {
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ControlURL string
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hc *http.Client
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}
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// NewHTTPTelemetry builds a telemetry emitter posting to
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// <controlURL>/control/v1/telemetry.
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func NewHTTPTelemetry(controlURL string) *HTTPTelemetry {
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return &HTTPTelemetry{ControlURL: controlURL, hc: &http.Client{Timeout: 10 * time.Second}}
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}
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func (t *HTTPTelemetry) Emit(ctx context.Context, event string, fields map[string]any) {
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if t.ControlURL == "" {
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return
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}
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payload := map[string]any{"event": event, "fields": fields}
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body, err := json.Marshal(payload)
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if err != nil {
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return
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, t.ControlURL+"/control/v1/telemetry", bytes.NewReader(body))
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if err != nil {
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return
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}
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req.Header.Set("Content-Type", "application/json")
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// Best-effort: a dropped telemetry event must never fail the publication
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// it describes.
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resp, err := t.hc.Do(req)
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if err != nil {
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return
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}
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_ = resp.Body.Close()
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}
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