DHPC Technical Report DHPC-072
Implementing Asynchronous Remote Method Invocation in Java
K.E. Kerry Falkner, P.D. Coddington and M.J. Oudshoorn
Archived: 2 July 1999
Published in Proc. of Parallel and Real Time Systems (PART'99),
Melbourne, November 1999.
Abstract
Java's Remote Method Invocation is an example of a synchronous
communication mechanism with a well defined protocol. Many software
systems require more flexibility in their communication mechanisms,
including asynchronous communication and delayed referencing of
objects (Futures). This paper introduces a novel mechanism allowing
Java remote objects to use extended communication protocols without
changes to the underlying wire or serialisation protocols. These
extensions can be utilised by standard remote objects without
additional coding changes and can be incorporated with standard Java
clients.
This paper explores the possibilities of implementing client
controlled versus server controlled asynchronous communication and
dynamic selection of protocols through the use of a precompiler for
the remote object classes. A discussion of the possibility of
integrating Futures and Batched Futures, and any required programming
abstractions, into this mechanism is conducted. It is proposed that
this mechanism can be used in any object system that is based on
Fragmented Objects, which use a stub or proxy to provide transparent
access to remote server methods.
Keywords: Java, RMI, Asynchronous, Futures, Remote Method Invocation.
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