/*
 * 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.hudi.hive.util;

import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.metastore.IMetaStoreClient;
import org.apache.hadoop.hive.metastore.api.MetaException;
import org.apache.hadoop.hive.ql.metadata.Hive;
import org.apache.hadoop.hive.ql.metadata.HiveException;

import java.lang.reflect.InvocationTargetException;

/**
 * Utilities for fetching Hive metastore client.
 */
public class IMetaStoreClientUtil {

  /**
   * Returns the Hive metastore client with given Hive conf.
   */
  public static IMetaStoreClient getMSC(HiveConf hiveConf) throws HiveException, MetaException {
    IMetaStoreClient metaStoreClient;
    try {
      metaStoreClient = ((Hive) Hive.class.getMethod("getWithoutRegisterFns", HiveConf.class).invoke(null, hiveConf)).getMSC();
    } catch (NoSuchMethodException | IllegalAccessException | IllegalArgumentException
      | InvocationTargetException ex) {
      metaStoreClient = Hive.get(hiveConf).getMSC();
    }
    return metaStoreClient;
  }
}
