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Message points

A message point is associated with a messaging engine and holds messages for a bus destination.

A message point is the general term for the location on a messaging engine where messages are held for a bus destination. A message point can be:

For point-to-point messaging, the administrator selects one bus member, which can be an application server or server cluster, to hold the messages of the queue destination. This action automatically defines a queue point for each messaging engine in the assigned bus member.

Applications can use an alias destination to route messages to a target destination in the same bus or to another (foreign) bus (including across an IBM MQ link to a queue provided by IBM MQ). By assigning an alias destination to a subset of the queue points of a partitioned queue destination, alias destinations can be used to restrict the queue points used by producing and consuming applications.

For publish/subscribe messaging, the administrator configures a topic space destination, but does not have to assign a bus member for the topic space. A topic space has a publication point defined automatically for each messaging engine in the bus.

Message points can be remote from the application which is producing to or consuming from the bus destination. In other words, message points can be on a messaging engine other than the messaging engine to which the application is connected. In this situation the message point is represented at runtime by a remote message point on the remote messaging engine.

By monitoring message points and remote message points, we can fully analyze and resolve problems arising from distributed application messaging. For example, we can:


Subtopics


Related:

  • Publish/subscribe messaging and topic spaces
  • Message ordering
  • Mediation points
  • Mediation handlers and mediation handler lists
  • Queue destinations
  • Configure message points
  • Configure a message point
  • List message points for a bus destination
  • List message points for a messaging engine
  • List messages on a message point