WAP to show the object
communication using RMI.
The RMI (Java Remote
Method Invocation) system is a mechanism that enables an object on one Java
virtual machine to invoke methods on an object in another Java virtual machine.
Any object whose methods can be invoked in this way must implement the
java.rmi.Remote interface. When such an object is invoked, its arguments are
marshalled and sent from the local virtual machine to the remote one, where the
arguments are unmarshalled and used. When the method terminates, the results
are marshalled from the remote machine and sent to the caller's virtual
machine.
To make a remote object
accessible to other virtual machines, a program typically registers it with the
RMI registry. The program supplies to the registry the string name of the
remote object as well as the remote object itself. When a program wants to
access a remote object, it supplies the object's string name to the registry
that is on the same machine as the remote object. The registry returns to the
caller a reference (called stub) to the remote object. When the program
receives the stub for the remote object, it can invoke methods on the object
(through the stub).
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