package com.test;

import com.google.cloud.ServiceOptions;
import com.google.cloud.pubsub.v1.TopicAdminClient;
import com.google.cloud.pubsub.v1.TopicAdminSettings;
import com.google.pubsub.v1.Topic;
import com.google.pubsub.v1.ProjectName;

import com.google.auth.oauth2.GoogleCredentials;

public class TestApp {
	public static void main(String[] args) {
		TestApp tc = new TestApp();
	}

	private GoogleCredentials credential;

	public TestApp()  {

	String projectId = ServiceOptions.getDefaultProjectId();
	try {

		TopicAdminSettings topicAdminSettings =   TopicAdminSettings.newBuilder().build();
		TopicAdminClient topicAdminClient =	TopicAdminClient.create(topicAdminSettings);
		ProjectName project = ProjectName.of(projectId);
		for (Topic element : topicAdminClient.listTopics(project).iterateAll())
				System.out.println(element.getName());

	} catch (Exception ex)
	{
		System.out.println("ERROR " + ex);
	}
  }

}