Checking if a Topic Exists

You can check if a certain topic already exists from your mobile application.

The following example checks if the specified topic already exist in an application scope (you can similarly check the topic existence in a user and group scopes).

try {
  // Instantiate the target topic.
  KiiTopic topic = Kii.topic("SendingAlert");

  // Check if the topic exists.
  boolean exists = topic.exists();
  if (exists) {
    // The topic already exists.
  } else {
    // The topic does not exist.
  }
} catch (IOException e) {
  // Handle the error.
}

// Instantiate the target topic.
KiiTopic topic = Kii.topic("SendingAlert");

// Check if the topic exists.
topic.exists(new KiiCallback<Boolean>() {
  @Override
  public void onComplete(Boolean result, Exception e) {
    if (e != null) {
      // Handle the error.
      return;
    }
    if (result) {
      // The topic already exists.
    } else {
      // The topic does not exist.
    }
  }
});

This is the brief explanation of the sample code:

Get an instance of the topic that you want to check if it exists.
Execute the exists method to check if the topic exists or not.