Package jakarta.jms

Interface Topic

All Superinterfaces:
Destination
All Known Subinterfaces:
TemporaryTopic
public interface Topic extends Destination
A Topic object encapsulates a provider-specific topic name.

It is the way a client specifies the identity of a topic to Jakarta Messaging API methods. For those methods that use a Destination as a parameter, a Topic object may used as an argument . For example, a Topic can be used to create a MessageConsumer and a MessageProducer by calling:

  • Session.CreateConsumer(Destination destination)
  • Session.CreateProducer(Destination destination)

Many publish/subscribe (pub/sub) providers group topics into hierarchies and provide various options for subscribing to parts of the hierarchy. The Jakarta Messaging API places no restriction on what a Topic object represents. It may be a leaf in a topic hierarchy, or it may be a larger part of the hierarchy.

The organization of topics and the granularity of subscriptions to them is an important part of a pub/sub application's architecture. The Jakarta Messaging API does not specify a policy for how this should be done. If an application takes advantage of a provider-specific topic-grouping mechanism, it should document this. If the application is installed using a different provider, it is the job of the administrator to construct an equivalent topic architecture and create equivalent Topic objects.

Since:
JMS 1.0
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    String
    getTopicName()
    Gets the name of this topic.
    String
    toString()
    Returns a string representation of this object.

  • Method Details

    • getTopicName

      String getTopicName() throws JMSException
      Gets the name of this topic.

      Clients that depend upon the name are not portable.

      Returns:
      the topic name
      Throws:
      JMSException - if the Jakarta Messaging provider implementation of Topic fails to return the topic name due to some internal error.

    • toString

      String toString()
      Returns a string representation of this object.
      Overrides:
      toString in class Object
      Returns:
      the provider-specific identity values for this topic