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asset_store.go
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asset_store.go
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package etcd
import (
"context"
"errors"
"fmt"
"github.com/coreos/etcd/clientv3"
"github.com/gogo/protobuf/proto"
"github.com/sensu/sensu-go/backend/store"
"github.com/sensu/sensu-go/types"
)
const (
assetsPathPrefix = "assets"
)
var (
assetKeyBuilder = store.NewKeyBuilder(assetsPathPrefix)
)
func getAssetPath(asset *types.Asset) string {
return assetKeyBuilder.WithResource(asset).Build(asset.Name)
}
// GetAssetsPath gets the path of the asset store.
func GetAssetsPath(ctx context.Context, name string) string {
namespace := types.ContextNamespace(ctx)
return assetKeyBuilder.WithNamespace(namespace).Build(name)
}
// DeleteAssetByName deletes an asset by name.
func (s *Store) DeleteAssetByName(ctx context.Context, name string) error {
if name == "" {
return errors.New("must specify name")
}
_, err := s.client.Delete(ctx, GetAssetsPath(ctx, name))
return err
}
// GetAssets fetches all assets from the store
func (s *Store) GetAssets(ctx context.Context, pred *store.SelectionPredicate) ([]*types.Asset, error) {
assets := []*types.Asset{}
err := List(ctx, s.client, GetAssetsPath, &assets, pred)
return assets, err
}
// GetAssetByName gets an Asset by name.
func (s *Store) GetAssetByName(ctx context.Context, name string) (*types.Asset, error) {
if name == "" {
return nil, errors.New("must specify namespace and name")
}
resp, err := s.client.Get(ctx, GetAssetsPath(ctx, name))
if err != nil {
return nil, err
}
if len(resp.Kvs) == 0 {
return nil, nil
}
assetBytes := resp.Kvs[0].Value
asset := &types.Asset{}
if err := unmarshal(assetBytes, asset); err != nil {
return nil, err
}
if asset.Labels == nil {
asset.Labels = make(map[string]string)
}
if asset.Annotations == nil {
asset.Annotations = make(map[string]string)
}
return asset, nil
}
// UpdateAsset updates an asset.
func (s *Store) UpdateAsset(ctx context.Context, asset *types.Asset) error {
if err := asset.Validate(); err != nil {
return err
}
assetBytes, err := proto.Marshal(asset)
if err != nil {
return err
}
cmp := clientv3.Compare(clientv3.Version(getNamespacePath(asset.Namespace)), ">", 0)
req := clientv3.OpPut(getAssetPath(asset), string(assetBytes))
res, err := s.client.Txn(ctx).If(cmp).Then(req).Commit()
if err != nil {
return err
}
if !res.Succeeded {
return fmt.Errorf(
"could not create the asset %s in namespace %s",
asset.Name,
asset.Namespace,
)
}
return nil
}