CORBA 2.3 Glossary (NonStop CORBA 2.3.7+)

RMI
Remote Method Invocation. A distributed object model for one Java virtual machine to invoke
methods on an object running in a different Java virtual machine, possibly on different hosts.
RMI-IIOP
A version of Remote Method Invocation (RMI) implemented to use the CORBA IIOP protocol.
RMI over IIOP provides interoperability with CORBA objects implemented in any language if all
the remote interfaces are originally defined as RMI interfaces.
roll back
Undo (a transaction).
Root POA
The POA provided by the ORB to which all other POAs are related.
scalability
The characteristic that allows a system to grow to accommodate increased usage. On NonStop
systems, scalability is achieved largely through parallel processing.
security domain
The processes and configuration data that are manageable under a given user ID.
security service
An application service that verifies user identity as a means of restricting certain operations to
users who have proper identification (authentication).
sequence
An IDL data type that is essentially a one-dimensional array of specified maximum size and
length. IDL sequences can be bounded or unbounded. They are mapped to a Java class that has a
current length. In C++ they are mapped to a class that has a current length, a maximum length, and
a _var type for the data.
servant
An instance of a CORBA object. A servant resides in a server and handles and responds to a
particular request from a client.
servant manager
A POA component that acts on demand from the ORB to activate or deactivate servants. The
servant manager associates an ORB object with the appropriate servant. The two types of
managers are ServantActivator and ServantLocator. POA policies determine which manager is
used.
server
In distributed object technology, an application component that satisfies the requests of a client by
providing an execution space (hosting) one or more objects invoked by the client. More generally,
an application component that services the requests of a client. A server program is the source