import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.RollingUpgradeResponseProto; //导入依赖的package包/类
@Override
public RollingUpgradeInfo rollingUpgrade(RollingUpgradeAction action)
    throws IOException {
  final RollingUpgradeRequestProto r = RollingUpgradeRequestProto.newBuilder()
      .setAction(PBHelperClient.convert(action)).build();
  try {
    final RollingUpgradeResponseProto proto =
        rpcProxy.rollingUpgrade(null, r);
    if (proto.hasRollingUpgradeInfo()) {
      return PBHelperClient.convert(proto.getRollingUpgradeInfo());
    }
    return null;
  } catch (ServiceException e) {
    throw ProtobufHelper.getRemoteException(e);
  }
}
 

import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.RollingUpgradeResponseProto; //导入依赖的package包/类
@Override
public RollingUpgradeResponseProto rollingUpgrade(RpcController controller,
    RollingUpgradeRequestProto req) throws ServiceException {
  try {
    final RollingUpgradeInfo info = server.rollingUpgrade(
        PBHelper.convert(req.getAction()));
    final RollingUpgradeResponseProto.Builder b = RollingUpgradeResponseProto.newBuilder();
    if (info != null) {
      b.setRollingUpgradeInfo(PBHelper.convert(info));
    }
    return b.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}
 

import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.RollingUpgradeResponseProto; //导入依赖的package包/类
@Override
public RollingUpgradeInfo rollingUpgrade(RollingUpgradeAction action) throws IOException {
  final RollingUpgradeRequestProto r = RollingUpgradeRequestProto.newBuilder()
      .setAction(PBHelper.convert(action)).build();
  try {
    final RollingUpgradeResponseProto proto = rpcProxy.rollingUpgrade(null, r);
    if (proto.hasRollingUpgradeInfo()) {
      return PBHelper.convert(proto.getRollingUpgradeInfo());
    }
    return null;
  } catch (ServiceException e) {
    throw ProtobufHelper.getRemoteException(e);
  }
}
 

import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.RollingUpgradeResponseProto; //导入依赖的package包/类
@Override
public RollingUpgradeResponseProto rollingUpgrade(RpcController controller,
    RollingUpgradeRequestProto req) throws ServiceException {
  try {
    final RollingUpgradeInfo info = server.rollingUpgrade(
        PBHelperClient.convert(req.getAction()));
    final RollingUpgradeResponseProto.Builder b = RollingUpgradeResponseProto.newBuilder();
    if (info != null) {
      b.setRollingUpgradeInfo(PBHelperClient.convert(info));
    }
    return b.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}