| /** |
| * 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. |
| */ |
| package org.apache.hadoop.ipc; |
| |
| import org.apache.hadoop.ipc.RPC.Server.VerProtocolImpl; |
| import org.apache.hadoop.ipc.RpcPayloadHeader.RpcKind; |
| import org.apache.hadoop.ipc.protobuf.ProtocolInfoProtos.GetProtocolSignatureRequestProto; |
| import org.apache.hadoop.ipc.protobuf.ProtocolInfoProtos.GetProtocolSignatureResponseProto; |
| import org.apache.hadoop.ipc.protobuf.ProtocolInfoProtos.GetProtocolVersionsRequestProto; |
| import org.apache.hadoop.ipc.protobuf.ProtocolInfoProtos.GetProtocolVersionsResponseProto; |
| import org.apache.hadoop.ipc.protobuf.ProtocolInfoProtos.ProtocolSignatureProto; |
| import org.apache.hadoop.ipc.protobuf.ProtocolInfoProtos.ProtocolVersionProto; |
| |
| import com.google.protobuf.RpcController; |
| import com.google.protobuf.ServiceException; |
| |
| /** |
| * This class serves the requests for protocol versions and signatures by |
| * looking them up in the server registry. |
| */ |
| public class ProtocolMetaInfoServerSideTranslatorPB implements |
| ProtocolMetaInfoPB { |
| |
| RPC.Server server; |
| |
| public ProtocolMetaInfoServerSideTranslatorPB(RPC.Server server) { |
| this.server = server; |
| } |
| |
| @Override |
| public GetProtocolVersionsResponseProto getProtocolVersions( |
| RpcController controller, GetProtocolVersionsRequestProto request) |
| throws ServiceException { |
| String protocol = request.getProtocol(); |
| GetProtocolVersionsResponseProto.Builder builder = |
| GetProtocolVersionsResponseProto.newBuilder(); |
| for (RpcKind r : RpcKind.values()) { |
| long[] versions; |
| try { |
| versions = getProtocolVersionForRpcKind(r, protocol); |
| } catch (ClassNotFoundException e) { |
| throw new ServiceException(e); |
| } |
| ProtocolVersionProto.Builder b = ProtocolVersionProto.newBuilder(); |
| if (versions != null) { |
| b.setRpcKind(r.toString()); |
| for (long v : versions) { |
| b.addVersions(v); |
| } |
| } |
| builder.addProtocolVersions(b.build()); |
| } |
| return builder.build(); |
| } |
| |
| @Override |
| public GetProtocolSignatureResponseProto getProtocolSignature( |
| RpcController controller, GetProtocolSignatureRequestProto request) |
| throws ServiceException { |
| GetProtocolSignatureResponseProto.Builder builder = GetProtocolSignatureResponseProto |
| .newBuilder(); |
| String protocol = request.getProtocol(); |
| String rpcKind = request.getRpcKind(); |
| long[] versions; |
| try { |
| versions = getProtocolVersionForRpcKind(RpcKind.valueOf(rpcKind), |
| protocol); |
| } catch (ClassNotFoundException e1) { |
| throw new ServiceException(e1); |
| } |
| if (versions == null) { |
| return builder.build(); |
| } |
| for (long v : versions) { |
| ProtocolSignatureProto.Builder sigBuilder = ProtocolSignatureProto |
| .newBuilder(); |
| sigBuilder.setVersion(v); |
| try { |
| ProtocolSignature signature = ProtocolSignature.getProtocolSignature( |
| protocol, v); |
| for (int m : signature.getMethods()) { |
| sigBuilder.addMethods(m); |
| } |
| } catch (ClassNotFoundException e) { |
| throw new ServiceException(e); |
| } |
| builder.addProtocolSignature(sigBuilder.build()); |
| } |
| return builder.build(); |
| } |
| |
| private long[] getProtocolVersionForRpcKind(RpcKind rpcKind, |
| String protocol) throws ClassNotFoundException { |
| Class<?> protocolClass = Class.forName(protocol); |
| String protocolName = RPC.getProtocolName(protocolClass); |
| VerProtocolImpl[] vers = server.getSupportedProtocolVersions(rpcKind, |
| protocolName); |
| if (vers == null) { |
| return null; |
| } |
| long [] versions = new long[vers.length]; |
| for (int i=0; i<versions.length; i++) { |
| versions[i] = vers[i].version; |
| } |
| return versions; |
| } |
| } |