| /** |
| * 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.tools.rumen; |
| |
| import java.util.Set; |
| |
| /** |
| * {@link RackNode} represents a rack node in the cluster topology. |
| */ |
| public final class RackNode extends Node { |
| public RackNode(String name, int level) { |
| // Hack: ensuring rack name starts with "/". |
| super(name.startsWith("/") ? name : "/" + name, level); |
| } |
| |
| @Override |
| public synchronized boolean addChild(Node child) { |
| if (!(child instanceof MachineNode)) { |
| throw new IllegalArgumentException( |
| "Only MachineNode can be added to RackNode"); |
| } |
| return super.addChild(child); |
| } |
| |
| /** |
| * Get the machine nodes that belong to the rack. |
| * @return The machine nodes that belong to the rack. |
| */ |
| @SuppressWarnings({ "cast", "unchecked" }) |
| public Set<MachineNode> getMachinesInRack() { |
| return (Set<MachineNode>)(Set)getChildren(); |
| } |
| } |