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Topic Sets

info

This API is currently in beta and available via KeySessionExperimental.

A Topic Set is a collection of topics. When subscribing to a Topic Set, you will be automatically subscribed and receive updates to all the topics that belong to the set.

Creating a Topic Set​

TopicSet set = session.createTopicSet(Topics.create("Price", "UST", "OTR"));
set.add("Price", "UST", "2Y");
set.add("Price", "UST", "5Y");
set.applyChanges();

Note that set.applyChanges() atomically adds all the topics into the set and publishes this onto the platform.

Subscribing to a Topic Set​

// subscribe to data within the set
session.subscribeTopicSet("Price", "UST", "OTR", new TopicSetSubscriptionListener() {
  @Override
  public void complete(long count) {
    log.info("TopicSet subscription complete, got {} items", count);
  }
});