#81 create wrapper adapter for new DoguConfigRepository

We need a wrapper because of our specific errors
in the blueprint operator. Maybe we can introduce
them in the registry-lib as well, so we can
completely remove this wrapper adapter.

For now, the plan is to replace the old etcd
adapter step by step with the new adapter.

pkg/adapter/config/kubernetes/doguConfigRepository.go

@@ -0,0 +1,33 @@
+package kubernetes
+
+import (
+	"context"
+	"github.com/cloudogu/k8s-blueprint-operator/pkg/domain/common"
+	"github.com/cloudogu/k8s-blueprint-operator/pkg/domainservice"
+	"github.com/cloudogu/k8s-registry-lib/config"
+	"github.com/cloudogu/k8s-registry-lib/repository"
+)
+
+type DoguConfigRepository struct {
+	repo repository.DoguConfigRepository
+}
+
+func NewDoguConfigRepository(repo repository.DoguConfigRepository) *DoguConfigRepository {
+	return &DoguConfigRepository{repo: repo}
+}
+
+func (e DoguConfigRepository) Get(ctx context.Context, doguName common.SimpleDoguName) (config.DoguConfig, error) {
+	// TODO: There seems to be no way to know, if we have a NotFoundError or a connection error.
+	return e.repo.Get(ctx, config.SimpleDoguName(doguName))
+}
+
+func (e DoguConfigRepository) Update(ctx context.Context, entry config.DoguConfig) (config.DoguConfig, error) {
+	mergedConfig, err := e.repo.Update(ctx, entry)
+	// TODO: we cannot see here, if there is a real conflict or there was a connection error.
+	//  With a conflict, we can immediately restart the business process
+	//  With an connection error we need a longer backoff (internalError)
+	if err != nil {
+		return entry, domainservice.NewInternalError(err, "failed to save or merge config for %s", entry.DoguName)
+	}
+	return mergedConfig, nil
+}

pkg/domainservice/adapterInterfaces.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"github.com/cloudogu/k8s-blueprint-operator/pkg/domain/common"
 	"github.com/cloudogu/k8s-blueprint-operator/pkg/domain/ecosystem"
+	"github.com/cloudogu/k8s-registry-lib/config"
 
 	"github.com/cloudogu/cesapp-lib/core"
 
@@ -170,6 +171,12 @@ type GlobalConfigEntryRepository interface {
 	DeleteAllByKeys(context.Context, []common.GlobalConfigKey) error
 }
 
+// DoguConfigRepository TODO: add go doc, especially for errors
+type DoguConfigRepository interface {
+	Get(ctx context.Context, doguName common.SimpleDoguName) (config.DoguConfig, error)
+	Update(ctx context.Context, entry config.DoguConfig) (config.DoguConfig, error)
+}
+
 type DoguConfigEntryRepository interface {
 	// Get retrieves a key from the dogu's config.
 	// It can throw the following errors: