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         return sessionsConnectionEvents.computeIfAbsent(connectionStatus, k -> new EventCounter());
  30     }
  31
  32     private static Map<ConnectionStatus, EventCounter> getConnectionEvents(final String sessionId) {
  33         return SESSION_EVENTS.computeIfAbsent(sessionId, k -> new HashMap<>());
  34     }
  35
  36
  37     public static List<String> provideStatistics() {
  38         List<String> dump = new ArrayList<>();
  39         for (Map.Entry<String, Map<ConnectionStatus, EventCounter>> sessionEntries : SESSION_EVENTS.entrySet()) {
  40             Map<ConnectionStatus, EventCounter> sessionEvents = sessionEntries.getValue();
  41             dump.add(String.format("SESSION : %s", sessionEntries.getKey()));
  42             for (Map.Entry<ConnectionStatus, EventCounter> sessionEvent : sessionEvents.entrySet()) {
  43                 dump.add(String.format(" %s : %d", sessionEvent.getKey().toString(),
  44                                                    sessionEvent.getValue().getCount()));
  45             }
  46         }
  47         return dump;
  48
  49     }
  50
  51     public enum ConnectionStatus {
  52         CONNECTION_CREATED, CONNECTION_DISCONNECTED_BY_DEVICE, CONNECTION_DISCONNECTED_BY_OFP
  53     }
  54
  55     private static final class EventCounter {
  56         private final AtomicLongFieldUpdater<EventCounter> updater =
  57                 AtomicLongFieldUpdater.newUpdater(EventCounter.class, "count");
  58         private volatile long count;
  59
  60         public long getCount() {
  61             return count;
  62         }
  63
  64         public void increment() {
  65             count = updater.incrementAndGet(this);
  66         }
  67     }
  68
  69     public static void resetAllCounters() {
  70         SESSION_EVENTS.clear();
  71     }
  72
  73 }