Пример #1
0
  /**
   * Adds the given Publisher to the system.
   *
   * @param pub The given Publisher object
   * @return Returns true if the Publisher was added successfully else return false
   */
  public boolean addPublisher(Publisher pub) {

    if (pub == null
        || pub.getPublisher().getType() == null
        || pub.getPublisher().getType().contains(null)) return false;
    return publishers.add(pub.getPublisher());
  }
Пример #2
0
  /**
   * Subscribes a given Subscriber with the given subscription type
   *
   * @param subscriber The given Subscriber object
   * @param type Type of subscription
   * @return Returns true if the subscription was successfully applied for the given type
   */
  public boolean subscribe(Subscriber subscriber, String type) {

    boolean flag = false;

    if (subscriber != null && type != null) {

      for (Publisher pub : publishers) {

        if (pub.getPublisher().getType().contains(type)) {
          flag = true;
          break;
        }
      }
      if (!flag) return false;

      NewSubscriber newSubscriber = subscriber.getSubscriber();
      ArrayList<String> temp = subscriberMap.get(newSubscriber);

      if (temp != null) {
        if (temp.contains(type)) return false;

        subscriberMap.get(newSubscriber).add(type);
        return true;
      } else {
        ArrayList<String> tempType = new ArrayList<String>();
        tempType.add(type);
        subscriberMap.put(newSubscriber, tempType);
        return true;
      }
    }
    return false;
  }
Пример #3
0
  /**
   * Publishes the given message from Publisher
   *
   * @param publisherName The given Publisher object
   * @param messageDetails Message to be published
   * @return Returns true if the subscription of the type <b>type</b> was removed successfully else
   *     returns false
   */
  public boolean publishMessage(Publisher publisherName, Message messageDetails) {

    if (publisherName != null && messageDetails != null) {

      NewPublisher publisher = publisherName.getPublisher();
      if (!publishers.contains(publisher)) {

        return false;
      }

      for (Subscriber sub : subscriberMap.keySet()) {

        if (subscriberMap
            .get(sub)
            .contains(messageDetails.getMessage().getMetadata().getMessageType())) {

          sub.getSubscriber().receivedMessage(messageDetails);
        }
      }
    }
    return false;
  }
Пример #4
0
  /**
   * Removes the given Publisher from the system.
   *
   * @param pub The given Publisher object
   * @return Returns true if the Publisher was removed successfully else returns false
   */
  public boolean removePublisher(Publisher pub) {

    if (pub == null || pub.getPublisher() == null) return false;
    return publishers.remove(pub.getPublisher());
  }