[VOL-4289] Proto changes for gRPC migration
Change-Id: I317a0a865ccf78d0c37aa229c50d293a3f66c8bb
diff --git a/vendor/google.golang.org/grpc/internal/metadata/metadata.go b/vendor/google.golang.org/grpc/internal/metadata/metadata.go
new file mode 100644
index 0000000..3022626
--- /dev/null
+++ b/vendor/google.golang.org/grpc/internal/metadata/metadata.go
@@ -0,0 +1,50 @@
+/*
+ *
+ * Copyright 2020 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+// Package metadata contains functions to set and get metadata from addresses.
+//
+// This package is experimental.
+package metadata
+
+import (
+ "google.golang.org/grpc/metadata"
+ "google.golang.org/grpc/resolver"
+)
+
+type mdKeyType string
+
+const mdKey = mdKeyType("grpc.internal.address.metadata")
+
+// Get returns the metadata of addr.
+func Get(addr resolver.Address) metadata.MD {
+ attrs := addr.Attributes
+ if attrs == nil {
+ return nil
+ }
+ md, _ := attrs.Value(mdKey).(metadata.MD)
+ return md
+}
+
+// Set sets (overrides) the metadata in addr.
+//
+// When a SubConn is created with this address, the RPCs sent on it will all
+// have this metadata.
+func Set(addr resolver.Address, md metadata.MD) resolver.Address {
+ addr.Attributes = addr.Attributes.WithValues(mdKey, md)
+ return addr
+}