A negotiation model for dynamic composition of distributed applications

Proceedings Ninth International Workshop on Database and Expert Systems Applications (Cat. No.98EX130) Pub Date : 1998-08-26 DOI:10.1109/DEXA.1998.707500

I. Ben-Shaul, Y. Gidron, O. Holder

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引用次数: 17

Abstract

Dynamic composition of distributed applications from autonomous components is becoming attractive, and requires new composition models and infrastructures. In this paper, we address the problem of deploying components to remote sites as part of the dynamic composition process. In particular, we discuss the specification and allocation of resources to remotely deployed components. Satisfying the mutual needs of an autonomous component and the environment to which it was deployed suggests a negotiation-based approach. We present a model that allows programmers to specify the negotiation strategy as part of the component and a two-phase deployment protocol. The first phase involves negotiation between lightweight objects and results in either a contract or a failure. In the former case, the component can tailor itself according to the contract before the actual deployment, and in the latter case unnecessary deployment is avoided. The model has been implemented in Java as part of Hadas, an environment for the dynamic composition of distributed applications.

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分布式应用程序动态组合的协商模型

从自治组件动态组合分布式应用程序正变得越来越有吸引力，并且需要新的组合模型和基础设施。在本文中，我们解决了将组件部署到远程站点作为动态组合过程的一部分的问题。特别地，我们讨论了远程部署组件的资源规范和分配。满足自治组件及其部署环境的相互需求建议采用基于协商的方法。我们提出了一个模型，允许程序员指定协商策略作为组件和两阶段部署协议的一部分。第一阶段涉及轻量级对象之间的协商，并导致契约或失败。在前一种情况下，组件可以在实际部署之前根据契约进行裁剪，而在后一种情况下，则避免了不必要的部署。该模型已在Java中作为Hadas的一部分实现，Hadas是用于动态组合分布式应用程序的环境。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings Ninth International Workshop on Database and Expert Systems Applications (Cat. No.98EX130)

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