/**
* 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.hdfs.server.protocol;
import java.io.*;
/**
* The interface that AutomaticEditRoller uses to issue
* a log rolling to name node.
*/
public interface AutoEditsRollerInterface {
/**
* Roll edit log manually.
* @throws IOException if the roll failed.
*/
public void rollEditLogAdmin() throws IOException;
/**
* @return true if FSNamesystem is running
*/
boolean isNamesystemRunning();
boolean isNamesystemInitialized();
}