| title | description | author | ms.author | ms.date | ms.topic | ms.custom |
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Use the Azure portal to create Service Bus topics and subscriptions |
Quickstart: In this quickstart, you learn how to create a Service Bus topic and subscriptions to that topic by using the Azure portal. |
spelluru |
spelluru |
11/28/2023 |
quickstart |
mode-ui |
In this quickstart, you use the Azure portal to create a Service Bus topic and then create subscriptions to that topic.
Service Bus topics and subscriptions support a publish/subscribe messaging communication model. When you use topics and subscriptions, components of a distributed application don't communicate directly with each other; instead they exchange messages via a topic, which acts as an intermediary.
:::image type="content" source="./media/service-bus-java-how-to-use-topics-subscriptions/sb-topics-01.png" alt-text="Image showing how topics and subscriptions work.":::
In contrast with Service Bus queues, in which each message is processed by a single consumer, topics and subscriptions provide a one-to-many form of communication, using a publish/subscribe pattern. It's possible to register multiple subscriptions to a topic. When a message is sent to a topic, it's then made available to each subscription to handle/process independently. A subscription to a topic resembles a virtual queue that receives copies of the messages that were sent to the topic. You can optionally register filter rules for a topic on subscriptions, which allows you to filter or restrict which messages to a topic are received by which topic subscriptions.
Service Bus topics and subscriptions enable you to scale to process a large number of messages across a large number of users and applications.
[!INCLUDE service-bus-create-namespace-portal]
[!INCLUDE service-bus-create-topics-three-subscriptions-portal]
In this article, you created a Service Bus namespace, a topic in the namespace, and three subscriptions to the topic. To learn how to publish messages to the topic and subscribe for messages from a subscription, see one of the following quickstarts in the Publish and subscribe for messages section.