content: /*
   * 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.bookkeeper.net;
  
  import com.google.common.annotations.Beta;
  /** 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
   */
  @Beta
  public interface Node {
      /** @return the string representation of this node's network location at the specified level in the hierarchy*/
      String getNetworkLocation(int level);
  
      /** @return the string representation of this node's network location */
      String getNetworkLocation();
  
      /**
       * Set this node's network location.
       * @param location the location
       */
      void setNetworkLocation(String location);
  
      /** @return this node's name */
      String getName();
  
      /** @return this node's parent */
      Node getParent();
  
      /**
       * Set this node's parent.
       * @param parent the parent
       */
      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
       */
      int getLevel();
  
      /**
       * Set this node's level in the tree.
       * @param i the level
       */
      void setLevel(int i);
  }
  