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.ConcurrentHashMap;
  16 import java.util.concurrent.atomic.AtomicLongFieldUpdater;
  17
  18 public final class SessionStatistics {
  19
  20     private SessionStatistics() {
  21     }
  22
  23     private static final Map<String, Map<ConnectionStatus, EventCounter>> SESSION_EVENTS = new ConcurrentHashMap<>();
  24
  25     public static void countEvent(final String sessionId, final ConnectionStatus connectionStatus) {
  26         Map<ConnectionStatus, EventCounter> sessionsConnectionEvents = getConnectionEvents(sessionId);
  27         EventCounter connectionEvent = getConnectionEvent(sessionsConnectionEvents, connectionStatus);
  28         connectionEvent.increment();
  29     }
  30
  31     private static EventCounter getConnectionEvent(final Map<ConnectionStatus, EventCounter> sessionsConnectionEvents,
  32                                                    final ConnectionStatus connectionStatus) {
  33         return sessionsConnectionEvents.computeIfAbsent(connectionStatus, k -> new EventCounter());
  34     }
  35
  36     private static Map<ConnectionStatus, EventCounter> getConnectionEvents(final String sessionId) {
  37         return SESSION_EVENTS.computeIfAbsent(sessionId, k -> new HashMap<>());
  38     }
  39
  40
  41     public static List<String> provideStatistics() {
  42         List<String> dump = new ArrayList<>();
  43         for (Map.Entry<String, Map<ConnectionStatus, EventCounter>> sessionEntries : SESSION_EVENTS.entrySet()) {
  44             Map<ConnectionStatus, EventCounter> sessionEvents = sessionEntries.getValue();
  45             dump.add(String.format("SESSION : %s", sessionEntries.getKey()));
  46             for (Map.Entry<ConnectionStatus, EventCounter> sessionEvent : sessionEvents.entrySet()) {
  47                 dump.add(String.format(" %s : %d", sessionEvent.getKey().toString(),
  48                                                    sessionEvent.getValue().getCount()));
  49             }
  50         }
  51         return dump;
  52
  53     }
  54
  55     public enum ConnectionStatus {
  56         CONNECTION_CREATED, CONNECTION_DISCONNECTED_BY_DEVICE, CONNECTION_DISCONNECTED_BY_OFP
  57     }
  58
  59     private static final class EventCounter {
  60         private final AtomicLongFieldUpdater<EventCounter> updater =
  61                 AtomicLongFieldUpdater.newUpdater(EventCounter.class, "count");
  62         private volatile long count;
  63
  64         public long getCount() {
  65             return count;
  66         }
  67
  68         public void increment() {
  69             count = updater.incrementAndGet(this);
  70         }
  71     }
  72
  73     public static void resetAllCounters() {
  74         SESSION_EVENTS.clear();
  75     }
  76
  77 }