/
metrics.go
220 lines (186 loc) · 5.98 KB
/
metrics.go
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package api
import (
"context"
"errors"
"sort"
"github.com/Fenrislol/grafana/pkg/models"
"github.com/Fenrislol/grafana/pkg/plugins"
"github.com/Fenrislol/grafana/pkg/api/dtos"
"github.com/Fenrislol/grafana/pkg/bus"
"github.com/Fenrislol/grafana/pkg/components/simplejson"
"github.com/Fenrislol/grafana/pkg/tsdb"
"github.com/Fenrislol/grafana/pkg/tsdb/testdatasource"
"github.com/Fenrislol/grafana/pkg/util"
)
// QueryMetricsV2 returns query metrics
// POST /api/ds/query DataSource query w/ expressions
func (hs *HTTPServer) QueryMetricsV2(c *models.ReqContext, reqDto dtos.MetricRequest) Response {
if len(reqDto.Queries) == 0 {
return Error(400, "No queries found in query", nil)
}
request := &tsdb.TsdbQuery{
TimeRange: tsdb.NewTimeRange(reqDto.From, reqDto.To),
Debug: reqDto.Debug,
User: c.SignedInUser,
}
expr := false
var ds *models.DataSource
for i, query := range reqDto.Queries {
hs.log.Debug("Processing metrics query", "query", query)
name := query.Get("datasource").MustString("")
if name == "__expr__" {
expr = true
}
datasourceID, err := query.Get("datasourceId").Int64()
if err != nil {
hs.log.Debug("Can't process query since it's missing data source ID")
return Error(400, "Query missing data source ID", nil)
}
if i == 0 && !expr {
ds, err = hs.DatasourceCache.GetDatasource(datasourceID, c.SignedInUser, c.SkipCache)
if err != nil {
hs.log.Debug("Encountered error getting data source", "err", err)
if errors.Is(err, models.ErrDataSourceAccessDenied) {
return Error(403, "Access denied to data source", err)
}
if errors.Is(err, models.ErrDataSourceNotFound) {
return Error(400, "Invalid data source ID", err)
}
return Error(500, "Unable to load data source metadata", err)
}
}
request.Queries = append(request.Queries, &tsdb.Query{
RefId: query.Get("refId").MustString("A"),
MaxDataPoints: query.Get("maxDataPoints").MustInt64(100),
IntervalMs: query.Get("intervalMs").MustInt64(1000),
QueryType: query.Get("queryType").MustString(""),
Model: query,
DataSource: ds,
})
}
var resp *tsdb.Response
var err error
if !expr {
resp, err = tsdb.HandleRequest(c.Req.Context(), ds, request)
if err != nil {
return Error(500, "Metric request error", err)
}
} else {
if !hs.Cfg.IsExpressionsEnabled() {
return Error(404, "Expressions feature toggle is not enabled", nil)
}
resp, err = plugins.Transform.Transform(c.Req.Context(), request)
if err != nil {
return Error(500, "Transform request error", err)
}
}
statusCode := 200
for _, res := range resp.Results {
if res.Error != nil {
res.ErrorString = res.Error.Error()
resp.Message = res.ErrorString
statusCode = 400
}
}
return JSON(statusCode, &resp)
}
// QueryMetrics returns query metrics
// POST /api/tsdb/query
func (hs *HTTPServer) QueryMetrics(c *models.ReqContext, reqDto dtos.MetricRequest) Response {
timeRange := tsdb.NewTimeRange(reqDto.From, reqDto.To)
if len(reqDto.Queries) == 0 {
return Error(400, "No queries found in query", nil)
}
datasourceId, err := reqDto.Queries[0].Get("datasourceId").Int64()
if err != nil {
return Error(400, "Query missing datasourceId", nil)
}
ds, err := hs.DatasourceCache.GetDatasource(datasourceId, c.SignedInUser, c.SkipCache)
if err != nil {
if err == models.ErrDataSourceAccessDenied {
return Error(403, "Access denied to datasource", err)
}
return Error(500, "Unable to load datasource meta data", err)
}
request := &tsdb.TsdbQuery{
TimeRange: timeRange,
Debug: reqDto.Debug,
User: c.SignedInUser,
}
for _, query := range reqDto.Queries {
request.Queries = append(request.Queries, &tsdb.Query{
RefId: query.Get("refId").MustString("A"),
MaxDataPoints: query.Get("maxDataPoints").MustInt64(100),
IntervalMs: query.Get("intervalMs").MustInt64(1000),
Model: query,
DataSource: ds,
})
}
resp, err := tsdb.HandleRequest(c.Req.Context(), ds, request)
if err != nil {
return Error(500, "Metric request error", err)
}
statusCode := 200
for _, res := range resp.Results {
if res.Error != nil {
res.ErrorString = res.Error.Error()
resp.Message = res.ErrorString
statusCode = 400
}
}
return JSON(statusCode, &resp)
}
// GET /api/tsdb/testdata/scenarios
func GetTestDataScenarios(c *models.ReqContext) Response {
result := make([]interface{}, 0)
scenarioIds := make([]string, 0)
for id := range testdatasource.ScenarioRegistry {
scenarioIds = append(scenarioIds, id)
}
sort.Strings(scenarioIds)
for _, scenarioId := range scenarioIds {
scenario := testdatasource.ScenarioRegistry[scenarioId]
result = append(result, map[string]interface{}{
"id": scenario.Id,
"name": scenario.Name,
"description": scenario.Description,
"stringInput": scenario.StringInput,
})
}
return JSON(200, &result)
}
// GenerateError generates a index out of range error
func GenerateError(c *models.ReqContext) Response {
var array []string
// nolint: govet
return JSON(200, array[20])
}
// GET /api/tsdb/testdata/gensql
func GenerateSQLTestData(c *models.ReqContext) Response {
if err := bus.Dispatch(&models.InsertSqlTestDataCommand{}); err != nil {
return Error(500, "Failed to insert test data", err)
}
return JSON(200, &util.DynMap{"message": "OK"})
}
// GET /api/tsdb/testdata/random-walk
func GetTestDataRandomWalk(c *models.ReqContext) Response {
from := c.Query("from")
to := c.Query("to")
intervalMs := c.QueryInt64("intervalMs")
timeRange := tsdb.NewTimeRange(from, to)
request := &tsdb.TsdbQuery{TimeRange: timeRange}
dsInfo := &models.DataSource{Type: "testdata"}
request.Queries = append(request.Queries, &tsdb.Query{
RefId: "A",
IntervalMs: intervalMs,
Model: simplejson.NewFromAny(&util.DynMap{
"scenario": "random_walk",
}),
DataSource: dsInfo,
})
resp, err := tsdb.HandleRequest(context.Background(), dsInfo, request)
if err != nil {
return Error(500, "Metric request error", err)
}
return JSON(200, &resp)
}