/**
* 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.hive.ql.security.authorization.plugin;
import org.apache.hadoop.hive.common.classification.InterfaceAudience.LimitedPrivate;
import org.apache.hadoop.hive.common.classification.InterfaceStability.Evolving;
import org.apache.hadoop.hive.metastore.IMetaStoreClient;
/**
* Factory for getting current valid instance of IMetaStoreClient
* Metastore client cannot be cached in authorization interface as that
* can get invalidated between the calls with the logic in Hive class.
* The standard way of getting metastore client object is through Hive.get().getMSC().
* But Hive class is not a public interface, so this factory helps in hiding Hive
* class from the authorization interface users.
*/
@LimitedPrivate(value = { "Apache Argus (incubating)" })
@Evolving
public interface HiveMetastoreClientFactory {
IMetaStoreClient getHiveMetastoreClient() throws HiveAuthzPluginException;
}