opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/impl/PublishNotificationsTask.java

   1 /*
   2  * Copyright (c) 2017 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 package org.opendaylight.controller.clustering.it.provider.impl;
   9
  10 import static com.google.common.base.Preconditions.checkArgument;
  11 import static java.util.Objects.requireNonNull;
  12
  13 import java.util.concurrent.Executors;
  14 import java.util.concurrent.ScheduledExecutorService;
  15 import java.util.concurrent.ScheduledFuture;
  16 import java.util.concurrent.TimeUnit;
  17 import org.opendaylight.controller.md.sal.binding.api.NotificationPublishService;
  18 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.target.rev170215.IdSequence;
  19 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.target.rev170215.IdSequenceBuilder;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 public class PublishNotificationsTask implements Runnable {
  24
  25     private static final Logger LOG = LoggerFactory.getLogger(PublishNotificationsTask.class);
  26     private static final int SECOND_AS_NANO = 1000000000;
  27
  28     private final NotificationPublishService notificationPublishService;
  29     private final String notificationId;
  30     private final long timeToTake;
  31     private final long delay;
  32
  33     private final ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
  34
  35     private long sequenceNumber = 1;
  36     private long startTime;
  37     private ScheduledFuture<?> scheduledFuture;
  38
  39     private Exception lastError = null;
  40
  41     public PublishNotificationsTask(final NotificationPublishService notificationPublishService,
  42                                     final String notificationId, final long secondsToTake, final long maxPerSecond) {
  43
  44         this.notificationPublishService = requireNonNull(notificationPublishService);
  45         this.notificationId = requireNonNull(notificationId);
  46         checkArgument(secondsToTake > 0);
  47         this.timeToTake = secondsToTake * SECOND_AS_NANO;
  48         checkArgument(maxPerSecond > 0);
  49         this.delay = SECOND_AS_NANO / maxPerSecond;
  50
  51         LOG.debug("Delay : {}", delay);
  52     }
  53
  54     @Override
  55     public void run() {
  56         final long current = System.nanoTime();
  57
  58         final IdSequence notification =
  59                 new IdSequenceBuilder().setId(notificationId).setSequenceNumber(sequenceNumber).build();
  60         sequenceNumber++;
  61
  62         try {
  63             LOG.debug("Publishing notification: {}", notification);
  64             notificationPublishService.putNotification(notification);
  65         } catch (final InterruptedException e) {
  66             LOG.warn("Unexpected exception while publishing notification, : {}", notification, e);
  67             lastError = e;
  68
  69             //stop on error
  70             scheduledFuture.cancel(false);
  71             executor.shutdown();
  72             return;
  73         }
  74
  75         LOG.debug("current {}, starttime: {}, timetotake: {}, current-start = {}",
  76                 current, startTime, timeToTake, current - startTime);
  77
  78         if (current - startTime > timeToTake) {
  79             LOG.debug("Sequence number: {}", sequenceNumber);
  80             scheduledFuture.cancel(false);
  81             executor.shutdown();
  82         }
  83     }
  84
  85     public void start() {
  86         startTime = System.nanoTime();
  87         scheduledFuture = executor.scheduleAtFixedRate(this, 0, delay, TimeUnit.NANOSECONDS);
  88     }
  89
  90     public boolean isFinished() {
  91         return scheduledFuture.isCancelled();
  92     }
  93
  94     public long getCurrentNotif() {
  95         return sequenceNumber;
  96     }
  97
  98     public Exception getLastError() {
  99         return lastError;
 100     }
 101 }