/**
* 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.yarn.server.nodemanager.api.impl.pb.client;

import java.io.IOException;

import java.lang.reflect.UndeclaredThrowableException;
import java.net.InetSocketAddress;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.yarn.exceptions.YarnRemoteException;
import org.apache.hadoop.yarn.ipc.ProtoOverHadoopRpcEngine;
import org.apache.hadoop.yarn.proto.LocalizationProtocol.LocalizationProtocolService;
import org.apache.hadoop.yarn.server.nodemanager.api.LocalizationProtocol;
import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalizerHeartbeatResponse;
import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalizerStatus;
import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.impl.pb.LocalizerHeartbeatResponsePBImpl;
import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.impl.pb.LocalizerStatusPBImpl;
import static org.apache.hadoop.yarn.proto.YarnServerNodemanagerServiceProtos.LocalizerStatusProto;

import com.google.protobuf.ServiceException;

public class LocalizationProtocolPBClientImpl implements LocalizationProtocol {

  private LocalizationProtocolService.BlockingInterface proxy;
  
  public LocalizationProtocolPBClientImpl(long clientVersion, InetSocketAddress addr, Configuration conf) throws IOException {
    RPC.setProtocolEngine(conf, LocalizationProtocolService.BlockingInterface.class, ProtoOverHadoopRpcEngine.class);
    proxy = (LocalizationProtocolService.BlockingInterface)RPC.getProxy(
        LocalizationProtocolService.BlockingInterface.class, clientVersion, addr, conf);
  }
  
  @Override
  public LocalizerHeartbeatResponse heartbeat(LocalizerStatus status)
    throws YarnRemoteException {
    LocalizerStatusProto statusProto = ((LocalizerStatusPBImpl)status).getProto();
    try {
      return new LocalizerHeartbeatResponsePBImpl(
          proxy.heartbeat(null, statusProto));
    } catch (ServiceException e) {
      if (e.getCause() instanceof YarnRemoteException) {
        throw (YarnRemoteException)e.getCause();
      } else if (e.getCause() instanceof UndeclaredThrowableException) {
        throw (UndeclaredThrowableException)e.getCause();
      } else {
        throw new UndeclaredThrowableException(e);
      }
    }
  }

}