Bridge configuration

The following summary of the MQe bridge is provided to aid understanding of the configurations and tasks described in this document. Details of bridge configuration and usage are described in Configuring bridge/gateway resources.

The MQe bridge (or gateway) is a specially configured MQe queue manager that acts as a link between an MQe network and an MQ network. For these purposes, a WebSphere® Message Broker queue manager is regarded as just another MQ queue manager in the MQ network. A bridge comprises the following elements linked together in a hierarchical, tree-like relationship:
  • Bridge
  • MQ proxy
  • Client connection
  • Listener
The following diagram shows both MQe and MQ objects required for a bridge and the flow of the messages.
Bridge configuration

At each level in the hierarchy, multiple elements can exist (e.g. multiple MQ proxies per bridge, multiple client connections per MQ proxy, etc). The bridge object reflects the overall hierarchy and establishes some default behavior. The MQ proxy identifies the target MQ queue manager; the client connection describes the details of the mechanisms through which the MQe and MQ communicate. Finally, the listener provides the additional information needed to move messages from MQ to MQe. The bridge can thus be regarded as providing the queue manager-level addressability between the two networks.

One element of the bridge configuration involves the specification of the transformer class to be used; this transformer will be invoked whenever an MQe message is to be sent to MQ, or whenever a MQ message is to be sent to MQe.

Once a bridge has been configured it is necessary, on that same MQe queue manager, to add details of the MQ queues that are to be accessible from MQe. This involves the definition of bridge queues, each definition identifies one target queue on MQ. Bridge queues thus provide the queue-level addressability between the two networks.


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