openflowplugin-impl/src/main/java/org/opendaylight/openflowplugin/impl/statistics/ofpspecific/SessionStatistics.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.openflowplugin.impl.statistics.ofpspecific;
  10
  11 import java.util.ArrayList;
  12 import java.util.HashMap;
  13 import java.util.List;
  14 import java.util.Map;
  15 import java.util.concurrent.atomic.AtomicLongFieldUpdater;
  16
  17 /**
  18  * Created by Martin Bobak &lt;mbobak@cisco.com&gt; on 5.6.2015.
  19  */
  20 public class SessionStatistics {
  21
  22     private static final Map<String, Map<ConnectionStatus, EventCounter>> SESSION_EVENTS = new HashMap<>();
  23
  24     public static void countEvent(final String sessionId, final ConnectionStatus connectionStatus) {
  25         Map<ConnectionStatus, EventCounter> sessionsConnectionEvents = getConnectionEvents(sessionId);
  26         EventCounter connectionEvent = getConnectionEvent(sessionsConnectionEvents, connectionStatus);
  27         connectionEvent.increment();
  28     }
  29
  30     private static EventCounter getConnectionEvent(final Map<ConnectionStatus, EventCounter> sessionsConnectionEvents,
  31                                                    final ConnectionStatus connectionStatus) {
  32         EventCounter eventCounter = sessionsConnectionEvents.get(connectionStatus);
  33         if (null == eventCounter) {
  34             eventCounter = new EventCounter();
  35             sessionsConnectionEvents.put(connectionStatus, eventCounter);
  36         }
  37         return eventCounter;
  38     }
  39
  40     private static Map<ConnectionStatus, EventCounter> getConnectionEvents(final String sessionId) {
  41         Map<ConnectionStatus, EventCounter> sessionConnectionEvents = SESSION_EVENTS.get(sessionId);
  42         if (null == sessionConnectionEvents) {
  43             sessionConnectionEvents = new HashMap<>();
  44             SESSION_EVENTS.put(sessionId, sessionConnectionEvents);
  45         }
  46         return sessionConnectionEvents;
  47     }
  48
  49
  50     public static List<String> provideStatistics() {
  51         List<String> dump = new ArrayList<>();
  52         for (Map.Entry<String, Map<ConnectionStatus, EventCounter>> sessionEntries : SESSION_EVENTS.entrySet()) {
  53             Map<ConnectionStatus, EventCounter> sessionEvents = sessionEntries.getValue();
  54             dump.add(String.format("SESSION : %s", sessionEntries.getKey()));
  55             for (Map.Entry<ConnectionStatus, EventCounter> sessionEvent : sessionEvents.entrySet()) {
  56                 dump.add(String.format(" %s : %d", sessionEvent.getKey().toString(), sessionEvent.getValue().getCount()));
  57             }
  58         }
  59         return dump;
  60
  61     }
  62
  63     public enum ConnectionStatus {
  64         CONNECTION_CREATED, CONNECTION_DISCONNECTED_BY_DEVICE, CONNECTION_DISCONNECTED_BY_OFP;
  65     }
  66
  67     private static final class EventCounter {
  68         private final AtomicLongFieldUpdater<EventCounter> updater = AtomicLongFieldUpdater.newUpdater(EventCounter.class, "count");
  69         private volatile long count;
  70
  71         public long getCount() {
  72             return count;
  73         }
  74
  75         public void increment() {
  76             count = updater.incrementAndGet(this);
  77         }
  78     }
  79
  80     public static void resetAllCounters() {
  81         SESSION_EVENTS.clear();
  82     }
  83
  84 }