001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.ipc.protocolPB;
020
021import java.io.IOException;
022import java.util.Collection;
023import java.util.List;
024
025import org.apache.hadoop.ipc.GenericRefreshProtocol;
026import org.apache.hadoop.ipc.RefreshResponse;
027import org.apache.hadoop.ipc.proto.GenericRefreshProtocolProtos.GenericRefreshRequestProto;
028import org.apache.hadoop.ipc.proto.GenericRefreshProtocolProtos.GenericRefreshResponseProto;
029import org.apache.hadoop.ipc.proto.GenericRefreshProtocolProtos.GenericRefreshResponseCollectionProto;
030
031import com.google.protobuf.RpcController;
032import com.google.protobuf.ServiceException;
033
034public class GenericRefreshProtocolServerSideTranslatorPB implements
035    GenericRefreshProtocolPB {
036
037  private final GenericRefreshProtocol impl;
038
039  public GenericRefreshProtocolServerSideTranslatorPB(
040      GenericRefreshProtocol impl) {
041    this.impl = impl;
042  }
043
044  @Override
045  public GenericRefreshResponseCollectionProto refresh(
046      RpcController controller, GenericRefreshRequestProto request)
047      throws ServiceException {
048    try {
049      List<String> argList = request.getArgsList();
050      String[] args = argList.toArray(new String[argList.size()]);
051
052      if (!request.hasIdentifier()) {
053        throw new ServiceException("Request must contain identifier");
054      }
055
056      Collection<RefreshResponse> results = impl.refresh(request.getIdentifier(), args);
057
058      return pack(results);
059    } catch (IOException e) {
060      throw new ServiceException(e);
061    }
062  }
063
064  // Convert a collection of RefreshResponse objects to a
065  // RefreshResponseCollection proto
066  private GenericRefreshResponseCollectionProto pack(
067    Collection<RefreshResponse> responses) {
068    GenericRefreshResponseCollectionProto.Builder b =
069      GenericRefreshResponseCollectionProto.newBuilder();
070
071    for (RefreshResponse response : responses) {
072      GenericRefreshResponseProto.Builder respBuilder =
073        GenericRefreshResponseProto.newBuilder();
074      respBuilder.setExitStatus(response.getReturnCode());
075      respBuilder.setUserMessage(response.getMessage());
076      respBuilder.setSenderName(response.getSenderName());
077
078      // Add to collection
079      b.addResponses(respBuilder);
080    }
081
082    return b.build();
083  }
084}