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Title: RAFDA : Middleware supporting the separation of application logic from distribution policy
Authors: Dearle, Alan
Walker, Scott
Norcross, Stuart
Kirby, Graham
McCarthy, Andrew
Keywords: cs.DC
Distributed, parallel, and cluster computing
QA75 Electronic computers. Computer science
Issue Date: 2005
Citation: Dearle , A , Walker , S , Norcross , S , Kirby , G & McCarthy , A 2005 , RAFDA : Middleware supporting the separation of application logic from distribution policy . Technical Report , no. CS/05/3 , University of St Andrews .
Series/Report no.: Technical Report
Abstract: Middleware technologies often limit the way in which object classes may be used in distributed applications due to the fixed distribution policies imposed by the Middleware system. These policies permeate the applications developed using them and force an unnatural encoding of application level semantics. For example, the application programmer has no direct control over inter-address-space parameter passing semantics since it is fixed by the application's distribution topology which is dictated early in the design cycle by the Middleware. This creates applications that are brittle with respect to changes in the way in which the applications are distributed. This paper explores technology permitting arbitrary objects in an application to be dynamically exposed for remote access. Using this, the application can be written without concern for its distribution with object placement and distribution boundaries decided late in the design cycle and even dynamically. Inter-address-space parameter passing semantics may also be decided independently of object implementation and at varying times in the design cycle, again, possibly as late as run-time. Furthermore, transmission policy may be defined on a per-class, per-method or per-parameter basis maximizing plasticity. This flexibility is of utility in the development of new distributed applications and the creation of management and monitoring infrastructures for existing applications.
Version: Preprint
Description: Submitted to Middleware 2005
Type: Report
Publisher: University of St Andrews
Appears in Collections:University of St Andrews Research
Computer Science Research

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