/
diagnostics_adapter.go
58 lines (49 loc) · 1.59 KB
/
diagnostics_adapter.go
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package backend
import (
"bytes"
"context"
"github.com/grafana/grafana-plugin-sdk-go/genproto/pluginv2"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/expfmt"
)
// diagnosticsSDKAdapter adapter between low level plugin protocol and SDK interfaces.
type diagnosticsSDKAdapter struct {
metricGatherer prometheus.Gatherer
checkHealthHandler CheckHealthHandler
}
func newDiagnosticsSDKAdapter(metricGatherer prometheus.Gatherer, checkHealthHandler CheckHealthHandler) *diagnosticsSDKAdapter {
return &diagnosticsSDKAdapter{
metricGatherer: metricGatherer,
checkHealthHandler: checkHealthHandler,
}
}
func (a *diagnosticsSDKAdapter) CollectMetrics(ctx context.Context, protoReq *pluginv2.CollectMetricsRequest) (*pluginv2.CollectMetricsResponse, error) {
mfs, err := a.metricGatherer.Gather()
if err != nil {
return nil, err
}
var buf bytes.Buffer
for _, mf := range mfs {
_, err := expfmt.MetricFamilyToText(&buf, mf)
if err != nil {
return nil, err
}
}
return &pluginv2.CollectMetricsResponse{
Metrics: &pluginv2.CollectMetricsResponse_Payload{
Prometheus: buf.Bytes(),
},
}, nil
}
func (a *diagnosticsSDKAdapter) CheckHealth(ctx context.Context, protoReq *pluginv2.CheckHealthRequest) (*pluginv2.CheckHealthResponse, error) {
if a.checkHealthHandler != nil {
res, err := a.checkHealthHandler.CheckHealth(ctx, FromProto().CheckHealthRequest(protoReq))
if err != nil {
return nil, err
}
return ToProto().CheckHealthResponse(res), nil
}
return &pluginv2.CheckHealthResponse{
Status: pluginv2.CheckHealthResponse_OK,
}, nil
}