Network Deployment (Distributed operating systems), v8.0 > Reference > Sets
Permanent topic namespace [Settings]
A topic namespace is a grouping of topics that allows information to be shared between applications.
To view this page in the console, click one of the following paths:
- Service integration -> WS-Notification -> Services -> service_name -> Permanent topic namespaces -> namespace_name
- Service integration -> Buses -> bus_name -> [Services] WS-Notification services -> service_name -> Permanent topic namespaces -> namespace_name
You use a permanent topic namespace to statically define the association between a WS-Notification topic namespace URI and a service integration bus topic space destination.
A permanent topic namespace has the following characteristics:
- We can use it to expose an existing service integration bus topic space for use by WS-Notification clients, thus permitting interoperation between the WS-Notification applications and existing publish and subscribe applications connected to the bus such as JMS.
- We can use it to restrict the structure and content of the topic namespace by applying one or more topic namespace documents that describe the required structure.
- We can use it as part of a topic space mapping configured on a service integration bus link (between two service integration buses) or a topic mapping as part of a publish and subscribe bridge between a service integration bus and a WebSphere MQ network.
When you create a new WS-Notification permanent topic namespace, you specify the namespace and associate it with one of the service integration bus topic spaces configured on the bus on which the parent WS-Notification service is defined. We cannot modify a permanent topic namespace after it has been created, other than to apply or remove topic namespace documents.
Configuration tab
These property values are preserved even if the runtime environment is stopped then restarted.
General Properties
Namespace
The URI string by which this topic namespace is known.
That is, the namespace URI by which WS-Notification applications refer to topics hosted by this namespace. For example http://widgetproducer.com/prices.
Required Yes Data type Text
Service integration bus topic space
The service integration bus topic space with which this namespace is associated.
That is, the bus topic space used by this topic namespace.
Required Yes Data type Custom
Message reliability
The service integration bus reliability to apply to messages published to this topic namespace.
Required Yes Data type drop-down list Range
Assured persistent
Messages are not discarded.
Reliable persistent
Messages might be discarded when a messaging engine fails.
Reliable non-persistent
Messages are discarded when a messaging engine stops or fails.
Express non-persistent
Messages are discarded when a messaging engine stops or fails. Messages might also be discarded if a connection used to send them becomes unavailable.
Best effort non-persistent
Messages are discarded when a messaging engine stops or fails. Messages might also be discarded if a connection used to send them becomes unavailable or as a result of constrained system resources.
Options for associating a permanent topic namespace with a bus topic space
Create a new WS-Notification permanent topic namespace
Showing the properties of a permanent WS-Notification topic namespace
Related
createWSNTopicNamespace command
showWSNTopicNamespace command
Administrative console buttons
Administrative console preferences