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/*
* Copyright 2015 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), hostCount);
}
}
}
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