Node.java
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上传日期:2018-01-08
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- /**
- * 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);
- }