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frontend_select_series.go
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/
frontend_select_series.go
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package frontend
import (
"context"
"net/http"
"time"
"github.com/bufbuild/connect-go"
"github.com/grafana/dskit/tenant"
"golang.org/x/sync/errgroup"
querierv1 "github.com/grafana/phlare/api/gen/proto/go/querier/v1"
phlaremodel "github.com/grafana/phlare/pkg/model"
"github.com/grafana/phlare/pkg/util/connectgrpc"
"github.com/grafana/phlare/pkg/util/httpgrpc"
"github.com/grafana/phlare/pkg/util/validation"
)
func (f *Frontend) SelectSeries(ctx context.Context,
c *connect.Request[querierv1.SelectSeriesRequest]) (
*connect.Response[querierv1.SelectSeriesResponse], error) {
tenantIDs, err := tenant.TenantIDs(ctx)
if err != nil {
return nil, httpgrpc.Errorf(http.StatusBadRequest, err.Error())
}
g, ctx := errgroup.WithContext(ctx)
if maxConcurrent := validation.SmallestPositiveNonZeroIntPerTenant(tenantIDs, f.limits.MaxQueryParallelism); maxConcurrent > 0 {
g.SetLimit(maxConcurrent)
}
m := phlaremodel.NewSeriesMerger(false)
interval := validation.MaxDurationOrZeroPerTenant(tenantIDs, f.limits.QuerySplitDuration)
intervals := NewTimeIntervalIterator(time.UnixMilli(c.Msg.Start), time.UnixMilli(c.Msg.End), interval,
WithAlignment(time.Second*time.Duration(c.Msg.Step)))
for intervals.Next() {
r := intervals.At()
g.Go(func() error {
req := connectgrpc.CloneRequest(c, &querierv1.SelectSeriesRequest{
ProfileTypeID: c.Msg.ProfileTypeID,
LabelSelector: c.Msg.LabelSelector,
Start: r.Start.UnixMilli(),
End: r.End.UnixMilli(),
GroupBy: c.Msg.GroupBy,
Step: c.Msg.Step,
})
resp, err := connectgrpc.RoundTripUnary[
querierv1.SelectSeriesRequest,
querierv1.SelectSeriesResponse](ctx, f, req)
if err != nil {
return err
}
m.MergeSeries(resp.Msg.Series)
return nil
})
}
if err = g.Wait(); err != nil {
return nil, err
}
return connect.NewResponse(&querierv1.SelectSeriesResponse{Series: m.Series()}), nil
}