/*
* Title: CloudSim Toolkit
* Description: CloudSim (Cloud Simulation) Toolkit for Modeling and Simulation of Clouds
* Licence: GPL - http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2009-2012, The University of Melbourne, Australia
*/
package org.cloudbus.cloudsim.network.datacenter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.cloudbus.cloudsim.core.CloudSim;
import org.cloudbus.cloudsim.core.CloudSimTags;
import org.cloudbus.cloudsim.core.SimEvent;
import org.cloudbus.cloudsim.core.predicates.PredicateType;
/**
* This class allows to simulate Root switch which connects Datacenter to external network. It
* interacts with other switches in order to exchange packets.
*
* Please refer to following publication for more details:
*
* Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel Applications in Cloud
* Simulations, Proceedings of the 4th IEEE/ACM International Conference on Utility and Cloud
* Computing (UCC 2011, IEEE CS Press, USA), Melbourne, Australia, December 5-7, 2011.
*
* @author Saurabh Kumar Garg
* @since CloudSim Toolkit 3.0
*/
public class RootSwitch extends Switch {
/**
* Constructor for Root Switch We have to specify switches that are connected to its downlink
* ports, and corresponding bandwidths
*
* @param name Name of the switch
* @param level At which level switch is with respect to hosts.
* @param dc Pointer to Datacenter
*/
public RootSwitch(String name, int level, NetworkDatacenter dc) {
super(name, level, dc);
downlinkswitchpktlist = new HashMap<Integer, List<NetworkPacket>>();
downlinkswitches = new ArrayList<Switch>();
downlinkbandwidth = NetworkConstants.BandWidthAggRoot;
latency = NetworkConstants.SwitchingDelayRoot;
numport = NetworkConstants.RootSwitchPort;
}
/**
* Send Packet to switch connected through a downlink port
*
* @param ev Event/packet to process
*/
@Override
protected void processpacket_up(SimEvent ev) {
// packet coming from down level router.
// has to send up
// check which switch to forward to
// add packet in the switch list
NetworkPacket hspkt = (NetworkPacket) ev.getData();
int recvVMid = hspkt.pkt.reciever;
CloudSim.cancelAll(getId(), new PredicateType(CloudSimTags.Network_Event_send));
schedule(getId(), switching_delay, CloudSimTags.Network_Event_send);
if (level == NetworkConstants.ROOT_LEVEL) {
// get id of edge router
int edgeswitchid = dc.VmToSwitchid.get(recvVMid);
// search which aggregate switch has it
int aggSwtichid = -1;
;
for (Switch sw : downlinkswitches) {
for (Switch edge : sw.downlinkswitches) {
if (edge.getId() == edgeswitchid) {
aggSwtichid = sw.getId();
break;
}
}
}
if (aggSwtichid < 0) {
System.out.println(" No destination for this packet");
} else {
List<NetworkPacket> pktlist = downlinkswitchpktlist.get(aggSwtichid);
if (pktlist == null) {
pktlist = new ArrayList<NetworkPacket>();
downlinkswitchpktlist.put(aggSwtichid, pktlist);
}
pktlist.add(hspkt);
}
}
}
}