Object Request Brokers


 

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The Object Request Broker (ORB) uses IIOP to manage client and server interaction.

The ORB provides a framework for clients to locate objects in the network and to call operations on those objects as if the remote objects are located in the same running process as the client, providing location transparency. The client calls an operation on a local object, known as a stub. The stub forwards the request to the remote object, where the operation runs and the results are returned to the client.

The client-side ORB...

  1. Creates an IIOP request that contains the operation and required parameters
  2. Sends the request on the network

The server-side ORB...

  1. Receives the IIOP request
  2. Locates the target object
  3. Invokes the requested operation
  4. Returns the results to the client

The client-side ORB demarshals the returned results and passes the result to the stub, which, in turn, returns to the client application, as if the operation had been run locally.

WAS v7 uses an ORB to manage communication between client applications and server applications as well as communication among product components. During product installation, default property values are set when the ORB is initialized. These properties control the run-time behavior of the ORB and can also affect the behavior of product components that are tightly integrated with the ORB, such as security. WAS v7 does not support the use of multiple ORB instances.



 

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Object Request Brokers: Links