Uma Implementação Tolerante a Faltas e Transparente da Plataforma J2EE
Abstract
The use of developing platforms to support the implementation of distributed applications has become a trend. These platforms provide a number of specialised services that help programmers to focous on the bussiness logic of the applications they develop, instead of wasting precious time with the implementation of infra-structure services. J2EE (Java 2 Enterprise Edition) is a platform backed up by SUN Microsystems that has lately gain a lot of attention. Unfortunately, the J2EE specification does not provide any support for fault tolerance, a non-fucntional requirement more and more necessary for distributed applications. Developers of such applications must themselves provide the necessary mechanisms to fulfil the requirements of the applications. Alternatively, they can use implementations of the platform that are themselves fault-tolerant. In this paper we present the design and implementation of such a platform. Unlike other implementations available, our implementation provides a solution that is highly reliable and totally transparent to the application.
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