Topic Use Cases

Working with topics. More...

Working with topics.

Registering a user data type

• Set up participant
• Register user data type of type Foo under the name "My Type"

  type_name = "My Type";
  try {
      FooTypeSupport.register_type(participant, type_name);
  } catch (DDS.Exception) {
      Console.WriteLine("***Error: failed to register type");
  }

Setting up a topic

• Set up participant
• Ensure user data type is registered
• Create a Topic under the name "My Topic"

  TopicQos topic_qos = new TopicQos();
  TopicListener topic_listener = null;
  
  try {
      participant.get_default_topic_qos(topic_qos);
  } catch (DDS.Exception) {
      Console.WriteLine(
          "***Error: failed to get default topic qos");
  }
  
  topic_name = "My Topic";
  Topic topic = participant.create_topic(
      topic_name,
      type_name,
      topic_qos,
      topic_listener,
      StatusMask.STATUS_MASK_NONE);
  if (topic == null) {
      Console.WriteLine("***Error: failed to create topic");
  }

Tearing down a topic

• Delete Topic:

  try {
      participant.delete_topic(ref topic);
  } catch (DDS.Exception) {
      Console.WriteLine("***Error: failed to delete topic");
  }