org.apache.hadoop.hdfs.server.diskbalancer.connectors.ClusterConnector Maven / Gradle / Ivy
/**
* 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.diskbalancer.connectors;
import org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerDataNode;
import java.util.List;
/**
* ClusterConnector interface hides all specifics about how we communicate to
* the HDFS cluster. This interface returns data in classes that diskbalancer
* understands.
*/
public interface ClusterConnector {
/**
* getNodes function returns a list of DiskBalancerDataNodes.
*
* @return Array of DiskBalancerDataNodes
*/
List getNodes() throws Exception;
/**
* Returns info about the connector.
*
* @return String.
*/
String getConnectorInfo();
}