WAS v8.5 > Administer applications and their environment > Welcome to administering Service integration > Administer bus destinations > Configure bus destinations > Create a bus destinationCreate a topic space for publish/subscribe messaging
We can create a topic space, which is a bus destination that represents a set of "publish and subscribe" topics and used for publish/subscribe messaging. We create a topic space when we deploy JMS applications that use publish/subscribe messaging.
To create a topic space, we specify only a minimum set of properties. We can change these properties and configure further properties after you complete this task.
To create a topic space, use the dmgr console to complete the following steps.
- In the navigation pane, click Service integration -> Buses.
- In the content pane, click the name of the bus that is to provide the publication points for the topic space.
- In the content pane, under Destination resources, click Destinations. A list of any existing bus destinations is displayed.
- To create a topic space, click New.
- On the Create new destination page, select Topic space.
- Click Next.
- In the Identifier field, type the name to give the topic space for administrative purposes.
- Optional: In the Description field, type a description of the destination, for administrative purposes.
- Click Next.
- On the Confirm topic space creation page, review the summary of actions.
- To create the topic space, click Finish.
- To change any of the properties specified, click Previous, then change the properties on the preceding pages.
- Save your changes to the master configuration.
We can configure further properties of the topic space, for example message reliability settings. See Configure bus destination properties. If you configure message reliability settings, remember that higher levels of reliability have a greater impact on performance.
By default, messages that cannot be delivered to the topic space are sent the default exception destination for the messaging engine that is publishing the message. To use a specific exception destination for messages that cannot be delivered to this topic space, you must have already defined that exception destination. For more information about configuring exception destinations, see Configure exception destination processing for a bus destination.
If the topic space is to be used for JMS publish/subscribe messaging, specify the topic space identifier on a JMS topic as described in Configure a topic for the default messaging provider.
Related concepts:
Publish/subscribe messaging and topic spaces
Related
Configure exception destination processing for a bus destination
Configure bus destination properties
Configure a topic for the default messaging provider
Administer topic space root roles
Administer topic roles
Configure JMS resources for publish/subscribe messaging
Reference:
Topic names and use of wildcard characters in topic expressions
Related information:
Topic space [Settings]
Publication points [Settings]
Destinations [Collection]