| /* |
| * Copyright 2015-present Open Networking Laboratory |
| * |
| * Licensed 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.onosproject.provider.nil; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| /** |
| * Tree topology with hosts at the leaf devices. |
| */ |
| public class TreeTopologySimulator extends TopologySimulator { |
| |
| private int[] tierMultiplier; |
| private int[] tierDeviceCount; |
| private int[] tierOffset; |
| |
| @Override |
| protected void processTopoShape(String shape) { |
| super.processTopoShape(shape); |
| tierOffset = new int[topoShape.length]; |
| tierMultiplier = new int[topoShape.length]; |
| tierDeviceCount = new int[topoShape.length]; |
| |
| deviceCount = 1; |
| |
| tierOffset[0] = 0; |
| tierMultiplier[0] = 1; |
| tierDeviceCount[0] = deviceCount; |
| |
| for (int i = 1; i < topoShape.length; i++) { |
| tierOffset[i] = deviceCount; |
| tierMultiplier[i] = Integer.parseInt(topoShape[i]); |
| tierDeviceCount[i] = tierDeviceCount[i - 1] * tierMultiplier[i]; |
| deviceCount = deviceCount + tierDeviceCount[i]; |
| } |
| } |
| |
| @Override |
| public void setUpTopology() { |
| checkArgument(tierDeviceCount.length > 0, "There must be at least one tree tier"); |
| super.setUpTopology(); |
| } |
| |
| @Override |
| protected void createLinks() { |
| int portOffset = 1; |
| for (int t = 1; t < tierOffset.length; t++) { |
| int child = tierOffset[t]; |
| for (int parent = tierOffset[t - 1]; parent < tierOffset[t]; parent++) { |
| for (int i = 0; i < tierMultiplier[t]; i++) { |
| createLink(parent, child, i + portOffset, 1); |
| child++; |
| } |
| } |
| portOffset = 2; // beyond first tier, allow for up-links |
| } |
| } |
| |
| @Override |
| protected void createHosts() { |
| for (int i = tierOffset[tierOffset.length - 1]; i < deviceCount; i++) { |
| createHosts(deviceIds.get(i), 2); |
| } |
| } |
| } |