--- /dev/null
+/*
+ *
+ * Copyright 2015 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.
+ *
+ */
+
+#ifndef GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_FACTORY_H
+#define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_FACTORY_H
+
+#include <grpc/support/port_platform.h>
+
+#include <grpc/impl/codegen/grpc_types.h>
+
+#include "src/core/ext/filters/client_channel/subchannel.h"
+#include "src/core/lib/gprpp/abstract.h"
+
+namespace grpc_core {
+
+class ClientChannelFactory {
+ public:
+ virtual ~ClientChannelFactory() = default;
+
+ // Creates a subchannel with the specified args.
+ virtual Subchannel* CreateSubchannel(const grpc_channel_args* args)
+ GRPC_ABSTRACT;
+
+ // Returns a channel arg containing the specified factory.
+ static grpc_arg CreateChannelArg(ClientChannelFactory* factory);
+
+ // Returns the factory from args, or null if not found.
+ static ClientChannelFactory* GetFromChannelArgs(
+ const grpc_channel_args* args);
+
+ GRPC_ABSTRACT_BASE_CLASS
+};
+
+} // namespace grpc_core
+
+#endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_FACTORY_H */