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grpc.go
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grpc.go
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// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.
package v1
import (
"context"
"time"
"github.com/prometheus/prometheus/promql"
"github.com/thanos-io/thanos/pkg/api/query/querypb"
"github.com/thanos-io/thanos/pkg/query"
"github.com/thanos-io/thanos/pkg/store/labelpb"
"github.com/thanos-io/thanos/pkg/store/storepb/prompb"
"google.golang.org/grpc"
)
type GrpcAPI struct {
now func() time.Time
queryableCreate query.QueryableCreator
queryEngine func(int64) *promql.Engine
defaultMaxResolutionSeconds time.Duration
}
func NewGrpcAPI(now func() time.Time, creator query.QueryableCreator, queryEngine func(int64) *promql.Engine, defaultMaxResolutionSeconds time.Duration) *GrpcAPI {
return &GrpcAPI{
now: now,
queryableCreate: creator,
queryEngine: queryEngine,
defaultMaxResolutionSeconds: defaultMaxResolutionSeconds,
}
}
func RegisterQueryServer(queryServer querypb.QueryServer) func(*grpc.Server) {
return func(s *grpc.Server) {
querypb.RegisterQueryServer(s, queryServer)
}
}
func (grpcAPI *GrpcAPI) Query(ctx context.Context, request *querypb.QueryRequest) (*querypb.QueryResponse, error) {
var ts time.Time
if request.TimeSeconds == 0 {
ts = grpcAPI.now()
} else {
ts = time.Unix(request.TimeSeconds, 0)
}
if request.TimeoutSeconds != 0 {
var cancel context.CancelFunc
timeout := time.Duration(request.TimeoutSeconds) * time.Second
ctx, cancel = context.WithTimeout(ctx, timeout)
defer cancel()
}
maxResolution := request.MaxResolutionSeconds
if request.MaxResolutionSeconds == 0 {
maxResolution = grpcAPI.defaultMaxResolutionSeconds.Milliseconds() / 1000
}
storeMatchers, err := querypb.StoreMatchersToLabelMatchers(request.StoreMatchers)
if err != nil {
return nil, err
}
qe := grpcAPI.queryEngine(request.MaxResolutionSeconds)
queryable := grpcAPI.queryableCreate(
request.EnableDedup,
request.ReplicaLabels,
storeMatchers,
maxResolution,
request.EnablePartialResponse,
request.EnableQueryPushdown,
false,
)
qry, err := qe.NewInstantQuery(queryable, request.Query, ts)
if err != nil {
return nil, err
}
result := qry.Exec(ctx)
switch vector := result.Value.(type) {
case promql.Scalar:
return &querypb.QueryResponse{
Timeseries: []prompb.TimeSeries{{
Samples: []prompb.Sample{{Value: vector.V, Timestamp: vector.T}},
}},
}, nil
case promql.Vector:
response := &querypb.QueryResponse{
Timeseries: make([]prompb.TimeSeries, 0, len(vector)),
}
for _, sample := range vector {
response.Timeseries = append(response.Timeseries, prompb.TimeSeries{
Labels: labelpb.ZLabelsFromPromLabels(sample.Metric),
Samples: prompb.SamplesFromPromqlPoints([]promql.Point{sample.Point}),
})
}
return response, nil
}
return nil, nil
}
func (grpcAPI *GrpcAPI) QueryRange(ctx context.Context, request *querypb.QueryRangeRequest) (*querypb.QueryRangeResponse, error) {
if request.TimeoutSeconds != 0 {
var cancel context.CancelFunc
ctx, cancel = context.WithTimeout(ctx, time.Duration(request.TimeoutSeconds))
defer cancel()
}
maxResolution := request.MaxResolutionSeconds
if request.MaxResolutionSeconds == 0 {
maxResolution = grpcAPI.defaultMaxResolutionSeconds.Milliseconds() / 1000
}
storeMatchers, err := querypb.StoreMatchersToLabelMatchers(request.StoreMatchers)
if err != nil {
return nil, err
}
qe := grpcAPI.queryEngine(request.MaxResolutionSeconds)
queryable := grpcAPI.queryableCreate(
request.EnableDedup,
request.ReplicaLabels,
storeMatchers,
maxResolution,
request.EnablePartialResponse,
request.EnableQueryPushdown,
false,
)
startTime := time.Unix(request.StartTimeSeconds, 0)
endTime := time.Unix(request.EndTimeSeconds, 0)
interval := time.Duration(request.IntervalSeconds) * time.Second
qry, err := qe.NewRangeQuery(queryable, request.Query, startTime, endTime, interval)
if err != nil {
return nil, err
}
result := qry.Exec(ctx)
switch matrix := result.Value.(type) {
case promql.Matrix:
response := &querypb.QueryRangeResponse{
Timeseries: make([]prompb.TimeSeries, len(matrix)),
}
for i, series := range matrix {
response.Timeseries[i] = prompb.TimeSeries{
Labels: labelpb.ZLabelsFromPromLabels(series.Metric),
Samples: prompb.SamplesFromPromqlPoints(series.Points),
}
}
return response, nil
}
return nil, nil
}