package org.apache.hadoop.yarn.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.api.AMRMProtocol;
import org.apache.hadoop.yarn.api.protocolrecords.AllocateRequest;
import org.apache.hadoop.yarn.api.protocolrecords.AllocateResponse;
import org.apache.hadoop.yarn.api.protocolrecords.FinishApplicationMasterRequest;
import org.apache.hadoop.yarn.api.protocolrecords.FinishApplicationMasterResponse;
import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterRequest;
import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterResponse;
import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.AllocateRequestPBImpl;
import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.AllocateResponsePBImpl;
import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.FinishApplicationMasterRequestPBImpl;
import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.FinishApplicationMasterResponsePBImpl;
import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.RegisterApplicationMasterRequestPBImpl;
import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.RegisterApplicationMasterResponsePBImpl;
import org.apache.hadoop.yarn.exceptions.YarnRemoteException;
import org.apache.hadoop.yarn.ipc.ProtoOverHadoopRpcEngine;
import org.apache.hadoop.yarn.proto.AMRMProtocol.AMRMProtocolService;
import org.apache.hadoop.yarn.proto.YarnServiceProtos.AllocateRequestProto;
import org.apache.hadoop.yarn.proto.YarnServiceProtos.FinishApplicationMasterRequestProto;
import org.apache.hadoop.yarn.proto.YarnServiceProtos.RegisterApplicationMasterRequestProto;

import com.google.protobuf.ServiceException;

public class AMRMProtocolPBClientImpl implements AMRMProtocol {

  private AMRMProtocolService.BlockingInterface proxy;
  
  public AMRMProtocolPBClientImpl(long clientVersion, InetSocketAddress addr, Configuration conf) throws IOException {
    RPC.setProtocolEngine(conf, AMRMProtocolService.BlockingInterface.class, ProtoOverHadoopRpcEngine.class);
    proxy = (AMRMProtocolService.BlockingInterface)RPC.getProxy(
        AMRMProtocolService.BlockingInterface.class, clientVersion, addr, conf);
  }
  
  
  @Override
  public AllocateResponse allocate(AllocateRequest request)
      throws YarnRemoteException {
    AllocateRequestProto requestProto = ((AllocateRequestPBImpl)request).getProto();
    try {
      return new AllocateResponsePBImpl(proxy.allocate(null, requestProto));
    } 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);
      }
    }
  }

  
  
  @Override
  public FinishApplicationMasterResponse finishApplicationMaster(
      FinishApplicationMasterRequest request) throws YarnRemoteException {
    FinishApplicationMasterRequestProto requestProto = ((FinishApplicationMasterRequestPBImpl)request).getProto();
    try {
      return new FinishApplicationMasterResponsePBImpl(proxy.finishApplicationMaster(null, requestProto));
    } 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);
      }
    }
  }

  @Override
  public RegisterApplicationMasterResponse registerApplicationMaster(
      RegisterApplicationMasterRequest request) throws YarnRemoteException {
    RegisterApplicationMasterRequestProto requestProto = ((RegisterApplicationMasterRequestPBImpl)request).getProto();
    try {
      return new RegisterApplicationMasterResponsePBImpl(proxy.registerApplicationMaster(null, requestProto));
    } 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);
      }
    }
  }
}