Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 1 | /** |
| 2 | * Copyright 2011, Big Switch Networks, Inc. |
| 3 | * Originally created by David Erickson, Stanford University |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 6 | * not use this file except in compliance with the License. You may obtain |
| 7 | * a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 13 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 14 | * License for the specific language governing permissions and limitations |
| 15 | * under the License. |
| 16 | **/ |
| 17 | |
| 18 | package net.floodlightcontroller.core.internal; |
| 19 | |
| 20 | import java.util.List; |
| 21 | import java.util.concurrent.CopyOnWriteArrayList; |
| 22 | import java.util.concurrent.TimeUnit; |
| 23 | |
| 24 | import net.floodlightcontroller.core.IOFSwitch; |
| 25 | import net.floodlightcontroller.threadpool.IThreadPoolService; |
| 26 | |
| 27 | import org.openflow.protocol.OFMessage; |
| 28 | import org.openflow.protocol.OFStatisticsReply; |
| 29 | import org.openflow.protocol.OFType; |
| 30 | import org.openflow.protocol.statistics.OFStatistics; |
| 31 | |
| 32 | /** |
| 33 | * A concrete implementation that handles asynchronously receiving OFStatistics |
| 34 | * |
| 35 | * @author David Erickson (daviderickson@cs.stanford.edu) |
| 36 | */ |
| 37 | public class OFStatisticsFuture extends |
| 38 | OFMessageFuture<List<OFStatistics>> { |
| 39 | |
| 40 | protected volatile boolean finished; |
| 41 | |
| 42 | public OFStatisticsFuture(IThreadPoolService tp, |
| 43 | IOFSwitch sw, int transactionId) { |
| 44 | super(tp, sw, OFType.STATS_REPLY, transactionId); |
| 45 | init(); |
| 46 | } |
| 47 | |
| 48 | public OFStatisticsFuture(IThreadPoolService tp, |
| 49 | IOFSwitch sw, int transactionId, long timeout, TimeUnit unit) { |
| 50 | super(tp, sw, OFType.STATS_REPLY, transactionId, timeout, unit); |
| 51 | init(); |
| 52 | } |
| 53 | |
| 54 | private void init() { |
| 55 | this.finished = false; |
| 56 | this.result = new CopyOnWriteArrayList<OFStatistics>(); |
| 57 | } |
| 58 | |
| 59 | @Override |
| 60 | protected void handleReply(IOFSwitch sw, OFMessage msg) { |
| 61 | OFStatisticsReply sr = (OFStatisticsReply) msg; |
| 62 | synchronized (this.result) { |
| 63 | this.result.addAll(sr.getStatistics()); |
| 64 | if ((sr.getFlags() & 0x1) == 0) { |
| 65 | this.finished = true; |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | @Override |
| 71 | protected boolean isFinished() { |
| 72 | return finished; |
| 73 | } |
| 74 | |
| 75 | @Override |
| 76 | protected void unRegister() { |
| 77 | super.unRegister(); |
| 78 | sw.cancelStatisticsReply(transactionId); |
| 79 | } |
| 80 | } |