Additional CORBA Services
The OMG has defined a number of services for CORBA. There is a small group called the Common Object Services (COS) that consists of the naming service, the Event service and the Lifecycle service. Although only the naming service is included with the JDK, many ORBs provide an event service and lifecycle service.
The lifecycle service defines how you make copies of objects and remove them. The one area the lifecycle doesn't address is object creation—you must create factories on your own to create objects.
The event service allows clients and servers to exchange data in an asynchronous fashion. EJB has a message service that provides essentially the same kinds of features as the CORBA event service. The event service ...
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