| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| /** |
| * These .proto interfaces are private and stable. |
| * Please see http://wiki.apache.org/hadoop/Compatibility |
| * for what changes are allowed for a *stable* .proto interface. |
| */ |
| |
| /** |
| * These are the messages used by Hadoop RPC for the Rpc Engine Protocol Buffer |
| * to marshal the request and response in the RPC layer. |
| * The messages are sent in addition to the normal RPC header as |
| * defined in RpcHeader.proto |
| */ |
| option java_package = "org.apache.hadoop.ipc.protobuf"; |
| option java_outer_classname = "ProtobufRpcEngineProtos"; |
| option java_generate_equals_and_hash = true; |
| package Hdfs.Internal; |
| |
| /** |
| * This message is the header for the Protobuf Rpc Engine |
| * when sending a RPC request from RPC client to the RPC server. |
| * The actual request (serialized as protobuf) follows this request. |
| * |
| * No special header is needed for the Rpc Response for Protobuf Rpc Engine. |
| * The normal RPC response header (see RpcHeader.proto) are sufficient. |
| */ |
| message RequestHeaderProto { |
| /** Name of the RPC method */ |
| required string methodName = 1; |
| |
| /** |
| * RPCs for a particular interface (ie protocol) are done using a |
| * IPC connection that is setup using rpcProxy. |
| * The rpcProxy's has a declared protocol name that is |
| * sent form client to server at connection time. |
| * |
| * Each Rpc call also sends a protocol name |
| * (called declaringClassprotocolName). This name is usually the same |
| * as the connection protocol name except in some cases. |
| * For example metaProtocols such ProtocolInfoProto which get metainfo |
| * about the protocol reuse the connection but need to indicate that |
| * the actual protocol is different (i.e. the protocol is |
| * ProtocolInfoProto) since they reuse the connection; in this case |
| * the declaringClassProtocolName field is set to the ProtocolInfoProto |
| */ |
| required string declaringClassProtocolName = 2; |
| |
| /** protocol version of class declaring the called method */ |
| required uint64 clientProtocolVersion = 3; |
| } |