| /** |
| * 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.net; |
| |
| /** The interface defines a node in a network topology. |
| * A node may be a leave representing a data node or an inner |
| * node representing a datacenter or rack. |
| * Each data has a name and its location in the network is |
| * decided by a string with syntax similar to a file name. |
| * For example, a data node's name is hostname:port# and if it's located at |
| * rack "orange" in datacenter "dog", the string representation of its |
| * network location is /dog/orange |
| */ |
| |
| public interface Node { |
| /** Return the string representation of this node's network location */ |
| public String getNetworkLocation(); |
| /** Set the node's network location */ |
| public void setNetworkLocation(String location); |
| /** Return this node's name */ |
| public String getName(); |
| /** Return this node's parent */ |
| public Node getParent(); |
| /** Set this node's parent */ |
| public void setParent(Node parent); |
| /** Return this node's level in the tree. |
| * E.g. the root of a tree returns 0 and its children return 1 |
| */ |
| public int getLevel(); |
| /** Set this node's level in the tree.*/ |
| public void setLevel(int i); |
| } |