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 public class SessionStatistics {
  18
  19     private static final Map<String, Map<ConnectionStatus, EventCounter>> SESSION_EVENTS = new HashMap<>();
  20
  21     public static void countEvent(final String sessionId, final ConnectionStatus connectionStatus) {
  22         Map<ConnectionStatus, EventCounter> sessionsConnectionEvents = getConnectionEvents(sessionId);
  23         EventCounter connectionEvent = getConnectionEvent(sessionsConnectionEvents, connectionStatus);
  24         connectionEvent.increment();
  25     }
  26
  27     private static EventCounter getConnectionEvent(final Map<ConnectionStatus, EventCounter> sessionsConnectionEvents,
  28                                                    final ConnectionStatus connectionStatus) {
  29         EventCounter eventCounter = sessionsConnectionEvents.get(connectionStatus);
  30         if (null == eventCounter) {
  31             eventCounter = new EventCounter();
  32             sessionsConnectionEvents.put(connectionStatus, eventCounter);
  33         }
  34         return eventCounter;
  35     }
  36
  37     private static Map<ConnectionStatus, EventCounter> getConnectionEvents(final String sessionId) {
  38         Map<ConnectionStatus, EventCounter> sessionConnectionEvents = SESSION_EVENTS.get(sessionId);
  39         if (null == sessionConnectionEvents) {
  40             sessionConnectionEvents = new HashMap<>();
  41             SESSION_EVENTS.put(sessionId, sessionConnectionEvents);
  42         }
  43         return sessionConnectionEvents;
  44     }
  45
  46
  47     public static List<String> provideStatistics() {
  48         List<String> dump = new ArrayList<>();
  49         for (Map.Entry<String, Map<ConnectionStatus, EventCounter>> sessionEntries : SESSION_EVENTS.entrySet()) {
  50             Map<ConnectionStatus, EventCounter> sessionEvents = sessionEntries.getValue();
  51             dump.add(String.format("SESSION : %s", sessionEntries.getKey()));
  52             for (Map.Entry<ConnectionStatus, EventCounter> sessionEvent : sessionEvents.entrySet()) {
  53                 dump.add(String.format(" %s : %d", sessionEvent.getKey().toString(),
  54                                                    sessionEvent.getValue().getCount()));
  55             }
  56         }
  57         return dump;
  58
  59     }
  60
  61     public enum ConnectionStatus {
  62         CONNECTION_CREATED, CONNECTION_DISCONNECTED_BY_DEVICE, CONNECTION_DISCONNECTED_BY_OFP
  63     }
  64
  65     private static final class EventCounter {
  66         private final AtomicLongFieldUpdater<EventCounter> updater =
  67                 AtomicLongFieldUpdater.newUpdater(EventCounter.class, "count");
  68         private volatile long count;
  69
  70         public long getCount() {
  71             return count;
  72         }
  73
  74         public void increment() {
  75             count = updater.incrementAndGet(this);
  76         }
  77     }
  78
  79     public static void resetAllCounters() {
  80         SESSION_EVENTS.clear();
  81     }
  82
  83 }