package org.apache.hadoop.yarn.server.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.ResourceTracker.ResourceTrackerService;
import org.apache.hadoop.yarn.proto.YarnServerCommonServiceProtos.NodeHeartbeatRequestProto;
import org.apache.hadoop.yarn.proto.YarnServerCommonServiceProtos.RegisterNodeManagerRequestProto;
import org.apache.hadoop.yarn.server.api.ResourceTracker;
import org.apache.hadoop.yarn.server.api.protocolrecords.NodeHeartbeatRequest;
import org.apache.hadoop.yarn.server.api.protocolrecords.NodeHeartbeatResponse;
import org.apache.hadoop.yarn.server.api.protocolrecords.RegisterNodeManagerRequest;
import org.apache.hadoop.yarn.server.api.protocolrecords.RegisterNodeManagerResponse;
import org.apache.hadoop.yarn.server.api.protocolrecords.impl.pb.NodeHeartbeatRequestPBImpl;
import org.apache.hadoop.yarn.server.api.protocolrecords.impl.pb.NodeHeartbeatResponsePBImpl;
import org.apache.hadoop.yarn.server.api.protocolrecords.impl.pb.RegisterNodeManagerRequestPBImpl;
import org.apache.hadoop.yarn.server.api.protocolrecords.impl.pb.RegisterNodeManagerResponsePBImpl;

import com.google.protobuf.ServiceException;

public class ResourceTrackerPBClientImpl implements ResourceTracker {

private ResourceTrackerService.BlockingInterface proxy;
  
  public ResourceTrackerPBClientImpl(long clientVersion, InetSocketAddress addr, Configuration conf) throws IOException {
    RPC.setProtocolEngine(conf, ResourceTrackerService.BlockingInterface.class, ProtoOverHadoopRpcEngine.class);
    proxy = (ResourceTrackerService.BlockingInterface)RPC.getProxy(
        ResourceTrackerService.BlockingInterface.class, clientVersion, addr, conf);
  }
  
  @Override
  public RegisterNodeManagerResponse registerNodeManager(
      RegisterNodeManagerRequest request) throws YarnRemoteException {
    RegisterNodeManagerRequestProto requestProto = ((RegisterNodeManagerRequestPBImpl)request).getProto();
    try {
      return new RegisterNodeManagerResponsePBImpl(proxy.registerNodeManager(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 NodeHeartbeatResponse nodeHeartbeat(NodeHeartbeatRequest request)
      throws YarnRemoteException {
    NodeHeartbeatRequestProto requestProto = ((NodeHeartbeatRequestPBImpl)request).getProto();
    try {
      return new NodeHeartbeatResponsePBImpl(proxy.nodeHeartbeat(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);
      }
    }
  }

}