/** Called periodically to retrieve all port statistics of all switches */
@Override
public synchronized void run() {
// get a list of all the switches found
Map<Long, IOFSwitch> switches = floodlightProvider.getSwitches();
Collection<IOFSwitch> swList = switches.values();
Iterator<IOFSwitch> it = swList.iterator();
try {
fw = new FileWriter("netstatslog.txt", true);
bw = new BufferedWriter(fw);
// for each switch, retrieve the statistics
while (it.hasNext()) {
IOFSwitch sw = it.next();
List<OFStatistics> stats = new ArrayList<OFStatistics>();
// make a statistics request
OFStatisticsRequest req = new OFStatisticsRequest();
req.setStatisticType(OFStatisticsType.PORT);
req.setXid(sw.getNextTransactionId());
// fill it with a specific request
OFPortStatisticsRequest specReq = new OFPortStatisticsRequest();
specReq.setPortNumber(OFPort.OFPP_NONE.getValue());
stats.add((OFStatistics) specReq);
req.setStatistics(stats);
req.setLengthU(req.getLengthU() + specReq.getLength());
// attempt to retrieve the statistics
Future<List<OFStatistics>> future = null;
List<OFStatistics> values = null;
try {
future = sw.getStatistics(req);
values = future.get();
} catch (Exception e) {
System.err.println("Exception while retrieving statistics for switch: " + sw + " " + e);
}
// process the statistics
if (!values.isEmpty()) {
OFPortStatisticsReply reply = (OFPortStatisticsReply) values.get(0);
// determine the new load
long newload = 0;
if (currentLoad.containsKey(sw.getId())) {
// we've seen the switch before
newload = reply.getTransmitBytes();
loadHistory.put(sw.getId(), reply.getTransmitBytes());
} else {
// this is the first time we see the switch
newload = reply.getTransmitBytes();
loadHistory.put(sw.getId(), newload);
}
// System.out.println("Capa: " + sw.getCapabilities() * 1024);
// System.out.println("Load: " + newload);
currentLoad.put(sw.getId(), (sw.getCapabilities() * 1024) - newload);
bw.write("\n id: " + sw.getId() + " ;load: " + ((sw.getCapabilities() * 1024) - newload));
// System.out.println("Load for switch: " + currentLoad.get(sw.getId()));
}
}
bw.write("\n******************");
bw.close();
} catch (Exception e) { // Catch exception if any
System.err.println("Error: " + e.getMessage());
}
}
public static void flush_all() {
Map<IOFSwitch, List<OFMessage>> msg_buffer_map = local_msg_buffer.get();
for (IOFSwitch sw : msg_buffer_map.keySet()) {
sw.flush();
}
}
