Use the opencloud reva from now on

vendor/github.com/opencloud-eu/reva/v2/pkg/registry/registry.go

@@ -0,0 +1,55 @@
+// Copyright 2018-2023 CERN
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// In applying this license, CERN does not waive the privileges and immunities
+// granted to it by virtue of its status as an Intergovernmental Organization
+// or submit itself to any jurisdiction.
+
+package registry
+
+import (
+	mRegistry "go-micro.dev/v4/registry"
+	"go-micro.dev/v4/selector"
+)
+
+var (
+	// fixme: get rid of global registry
+	gRegistry mRegistry.Registry
+)
+
+// Init prepares the service registry
+func Init(nRegistry mRegistry.Registry) error {
+	// first come first serves, the first service defines the registry type.
+	if gRegistry == nil && nRegistry != nil {
+		gRegistry = nRegistry
+	}
+
+	return nil
+}
+
+// GetRegistry exposes the registry
+func GetRegistry() mRegistry.Registry {
+	return gRegistry
+}
+
+// GetNodeAddress returns a random address from the service nodes
+func GetNodeAddress(services []*mRegistry.Service) (string, error) {
+	next := selector.Random(services)
+	node, err := next()
+	if err != nil {
+		return "", err
+	}
+
+	return node.Address, nil
+}