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Design and Performance of Asynchronous Method Handling for CORBA
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Design and Performance of Asynchronous Method Handling for CORBA
Mayur Deshpande6  , Douglas C. Schmidt6 , Carlos O’Ryan6 and Darrell Brunsch6
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Department of Electrical and Computer Engineering, University of California, 92612 Irvine |
Abstract
This paper describes the design and performance of a new mechanism, called asynchronous method handling (AMH), that allows
CORBA servers to process client requests asynchronously. AMH decouples the association of an incoming request from the run-time
stack that received the request, without incurring the context-switching, synchronization, and data movement overhead of conventional
CORBA multithreading models.
This paper provides two contributions to the study of asynchrony for CORBA servers. First, it describes the design and implementation
of AMH in The ACE ORB (TAO), a C++ CORBA ORB. The syntax and semantics of AMH are defined using the CORBA Interface Definition
Language (IDL), the forces that guided the design of AMH are described, and the patterns and C++ idioms used to resolve these
forces are presented. Second, we empirically compare a middle-tier server implemented using AMH against other CORBA server
concurrency models and show the advantages of the AMH mechanism against the other models.
This work was supported in part by ATD, SAIC, and Siemens MED.
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