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References in periodicals archive ?
Because each skeleton contains specific knowledge about all the operations supported by the interface it represents, including the number and types of arguments, they serve to assist the object adapter in dispatching each request to the proper servant.
In CORBA, object adapters mediate between the world of CORBA objects and the world of programming language implementations, which are called servants.
CORBA object adapters are real-world instances of the Adapter design pattern [1] because they adapt the interfaces of servants to the interfaces offered by CORBA objects.
Passing true CORBA objects by value is a difficult problem due to required interactions with object adapters, issues surrounding locating objects in motion, issues regarding whether objects are copied or moved, issues related to object identity and its preservation, and issues concerning the movement of objects between ORBs from different vendors.
Binding of persistent references, Persistent references created by a server contain the following information: the repository ID of the most derived interface (as for transient IORs); the host name and port number of the implementation repository; the object adapter name (embedded in the object key); and the object name (also embedded in the object key).
Of course, for persistent references, the connection leads to the implementation repository, which unpacks the object adapter name from the object key and uses it as an index into its server table:
* The server verifies that the object adapter name in the IOR matches its own adapter name.
If so, the client knows how the object key is encoded and can extract the object adapter name from the IOR.
This limitation arises because the implementation repository uses the object adapter name as a key into the location table.
Using the portable object adapter for transient and persistent CORBA objects.