/**
* 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.metastore;
import org.apache.hadoop.hive.common.classification.InterfaceAudience;
import org.apache.hadoop.hive.common.classification.InterfaceStability;
import org.apache.hadoop.hive.conf.HiveConf;
/**
* Runs arbitrary background logic inside the metastore service.
*/
@InterfaceAudience.LimitedPrivate({"Hive"})
@InterfaceStability.Evolving
public interface HouseKeeperService {
public void start(HiveConf hiveConf) throws Exception;
/**
* Should perform orderly shutdown
*/
public void stop();
/**
* Returns short description of services this module provides.
*/
public String getServiceDescription();
/**
* This is incremented each time the service is performed. Can be useful to
* check if serivce is still alive.
*/
public int getIsAliveCounter();
}