Making service-oriented java applications interoperable without compromising transparency

摘要

Object-oriented programming languages lack high-level support for platform-independent service interactions. In Java, for instance,the burden of guaranteeing sustainable interoperability is put entirely onthe programmer. Java Remote Method Invocation requires its invocationtargets to be remote Java objects, so Web Services and other targetscan never be invoked without verbose interactions with specialized library classes. This lack of transparency forces programmers to considerheterogeneity problems over and over again, even though interoperability is ideally a middleware responsibility. Moreover, by mixing businesslogic with non-functional concerns, the source code is obfuscated, whichdecreases code comprehensibility and maintainability.In this paper, we show that interoperability in Java applications canbe achieved without compromising transparency. We describe a Java extension and focus on how this language enables a precompiler to transparently inject the boilerplate code that realizes interoperable service interactions. Deferring interoperability provisioning to such a precompilerallows programmers to focus on the implementation of the business logicwithout being distracted by heterogeneity issues occurring in the servicearchitecture in which their application will eventually be deployed.