public void Overview()
{
string projectId = _fixture.ProjectId;
string topicId = _fixture.CreateTopicId();
string subscriptionId = _fixture.CreateSubscriptionId();
// Sample: Overview
// First create a topic.
PublisherClient publisher = PublisherClient.Create();
string topicName = PublisherClient.FormatTopicName(projectId, topicId);
publisher.CreateTopic(topicName);
// Subscribe to the topic.
SubscriberClient subscriber = SubscriberClient.Create();
string subscriptionName = SubscriberClient.FormatSubscriptionName(projectId, subscriptionId);
subscriber.CreateSubscription(subscriptionName, topicName, pushConfig: null, ackDeadlineSeconds: 60);
// Publish a message to the topic.
PubsubMessage message = new PubsubMessage
{
// The data is any arbitrary ByteString. Here, we're using text.
Data = ByteString.CopyFromUtf8("Hello, Pubsub"),
// The attributes provide metadata in a string-to-string dictionary.
Attributes =
{
{ "description", "Simple text message" }
}
};
publisher.Publish(topicName, new[] { message });
// Pull messages from the subscription. We're returning immediately, whether or not there
// are messages; in other cases you'll want to allow the call to wait until a message arrives.
PullResponse response = subscriber.Pull(subscriptionName, returnImmediately: true, maxMessages: 10);
foreach (ReceivedMessage received in response.ReceivedMessages)
{
PubsubMessage msg = received.Message;
Console.WriteLine($"Received message {msg.MessageId} published at {msg.PublishTime.ToDateTime()}");
Console.WriteLine($"Text: '{msg.Data.ToStringUtf8()}'");
}
// Acknowledge that we've received the messages. If we don't do this within 60 seconds (as specified
// when we created the subscription) we'll receive the messages again when we next pull.
subscriber.Acknowledge(subscriptionName, response.ReceivedMessages.Select(m => m.AckId));
// Tidy up by deleting the subscription and the topic.
subscriber.DeleteSubscription(subscriptionName);
publisher.DeleteTopic(topicName);
// End sample
Assert.Equal(1, response.ReceivedMessages.Count);
Assert.Equal("Hello, Pubsub", response.ReceivedMessages[0].Message.Data.ToStringUtf8());
Assert.Equal("Simple text message", response.ReceivedMessages[0].Message.Attributes["description"]);
}
public void CreateTopic()
{
string projectId = _fixture.ProjectId;
string topicId = _fixture.CreateTopicId();
// Snippet: CreateTopic
PublisherClient client = PublisherClient.Create();
// Alternative: use a known topic resource name
// "projects/{PROJECT_ID}/topics/{TOPIC_ID}"
string topicName = PublisherClient.FormatTopicName(projectId, topicId);
Topic topic = client.CreateTopic(topicName);
Console.WriteLine($"Created {topic.Name}");
// End snippet
}
