mirror of
https://github.com/grafana/grafana.git
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91 lines
2.4 KiB
Go
91 lines
2.4 KiB
Go
package service
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import (
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"context"
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"errors"
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"fmt"
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"sync"
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data "github.com/grafana/grafana-plugin-sdk-go/experimental/apis/data/v0alpha1"
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"github.com/grafana/grafana/pkg/infra/appcontext"
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"github.com/grafana/grafana/pkg/services/datasources"
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)
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// LegacyDataSourceRetriever supports finding a reference to datasources using the name or internal ID
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type LegacyDataSourceLookup interface {
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// Find the UID from either the name or internal id
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// NOTE the orgID will be fetched from the context
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GetDataSourceFromDeprecatedFields(ctx context.Context, name string, id int64) (*data.DataSourceRef, error)
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}
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var (
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_ DataSourceRetriever = (*Service)(nil)
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_ LegacyDataSourceLookup = (*cachingLegacyDataSourceLookup)(nil)
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_ LegacyDataSourceLookup = (*NoopLegacyDataSourcLookup)(nil)
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)
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// NoopLegacyDataSourceRetriever does not even try to lookup, it returns a raw reference
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type NoopLegacyDataSourcLookup struct {
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Ref *data.DataSourceRef
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}
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func (s *NoopLegacyDataSourcLookup) GetDataSourceFromDeprecatedFields(ctx context.Context, name string, id int64) (*data.DataSourceRef, error) {
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return s.Ref, nil
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}
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type cachingLegacyDataSourceLookup struct {
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retriever DataSourceRetriever
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cache map[string]cachedValue
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cacheMu sync.Mutex
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}
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type cachedValue struct {
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ref *data.DataSourceRef
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err error
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}
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func ProvideLegacyDataSourceLookup(p *Service) LegacyDataSourceLookup {
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return &cachingLegacyDataSourceLookup{
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retriever: p,
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cache: make(map[string]cachedValue),
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}
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}
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func (s *cachingLegacyDataSourceLookup) GetDataSourceFromDeprecatedFields(ctx context.Context, name string, id int64) (*data.DataSourceRef, error) {
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if id == 0 && name == "" {
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return nil, fmt.Errorf("either name or ID must be set")
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}
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user, err := appcontext.User(ctx)
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if err != nil {
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return nil, err
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}
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key := fmt.Sprintf("%d/%s/%d", user.OrgID, name, id)
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s.cacheMu.Lock()
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defer s.cacheMu.Unlock()
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v, ok := s.cache[key]
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if ok {
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return v.ref, v.err
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}
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ds, err := s.retriever.GetDataSource(ctx, &datasources.GetDataSourceQuery{
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OrgID: user.OrgID,
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Name: name,
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ID: id,
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})
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if errors.Is(err, datasources.ErrDataSourceNotFound) && name != "" {
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ds, err = s.retriever.GetDataSource(ctx, &datasources.GetDataSourceQuery{
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OrgID: user.OrgID,
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UID: name, // Sometimes name is actually the UID :(
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})
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}
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v = cachedValue{
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err: err,
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}
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if ds != nil {
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v.ref = &data.DataSourceRef{Type: ds.Type, UID: ds.UID}
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}
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return v.ref, v.err
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}
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