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azuremonitor.go
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azuremonitor.go
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package azuremonitor
import (
"context"
"fmt"
"net/http"
"github.com/grafana/grafana/pkg/log"
"github.com/grafana/grafana/pkg/models"
"github.com/grafana/grafana/pkg/tsdb"
)
var (
azlog log.Logger
)
// AzureMonitorExecutor executes queries for the Azure Monitor datasource - all four services
type AzureMonitorExecutor struct {
httpClient *http.Client
dsInfo *models.DataSource
}
// NewAzureMonitorExecutor initializes a http client
func NewAzureMonitorExecutor(dsInfo *models.DataSource) (tsdb.TsdbQueryEndpoint, error) {
httpClient, err := dsInfo.GetHttpClient()
if err != nil {
return nil, err
}
return &AzureMonitorExecutor{
httpClient: httpClient,
dsInfo: dsInfo,
}, nil
}
func init() {
azlog = log.New("tsdb.azuremonitor")
tsdb.RegisterTsdbQueryEndpoint("grafana-azure-monitor-datasource", NewAzureMonitorExecutor)
}
// Query takes in the frontend queries, parses them into the query format
// expected by chosen Azure Monitor service (Azure Monitor, App Insights etc.)
// executes the queries against the API and parses the response into
// the right format
func (e *AzureMonitorExecutor) Query(ctx context.Context, dsInfo *models.DataSource, tsdbQuery *tsdb.TsdbQuery) (*tsdb.Response, error) {
var result *tsdb.Response
var err error
var azureMonitorQueries []*tsdb.Query
for _, query := range tsdbQuery.Queries {
queryType := query.Model.Get("queryType").MustString("")
switch queryType {
case "Azure Monitor":
azureMonitorQueries = append(azureMonitorQueries, query)
default:
return nil, fmt.Errorf("Alerting not supported for %s", queryType)
}
}
azDatasource := &AzureMonitorDatasource{
httpClient: e.httpClient,
dsInfo: e.dsInfo,
}
result, err = azDatasource.executeTimeSeriesQuery(ctx, azureMonitorQueries, tsdbQuery.TimeRange)
return result, err
}