基于组件的轻量级迁移实例创建研究

【作者】 范志强；

【导师】 曾广周；

【作者基本信息】 山东大学 ， 计算机应用技术， 2006， 硕士

【摘要】 工作流管理是一项集成业务活动并使其能够自动化/半自动化完成的技术，能够方便人机协同，简化工作复杂度，是计算机科学、自动化科学、管理科学、先进制造等多领域研究的热点问题之一。 迁移工作流在传统工作流基础上，引入移动计算技术，将工作流系统分为工作流引擎、工作位置和迁移实例三部分。工作流执行被解释为迁移实例携带工作流业务过程说明，自治的发现资源并迁移，在目标工作位置上完成任务并返回的过程。 由于迁移实例的引入，迁移工作流更加智能、更具柔性，具备传统工作流不可比拟的优势。同时，也使得该系统的复杂度增加，尤其是迁移实例如何构造，才能既使其智能的与工作流引擎无缝连接，又不使其体系过于庞大，以致复杂度太高而无法实现轻量化迁移。 迁移实例是迁移工作流管理系统中任务执行的主体。现实中的工作流业务流程，不论工作于机构内还是机构间，通常都存在于一个具有信任合约关系的特定环境中。基于如上假设，本文在迁移工作流概念模型基础上，针对具有信任合约关系的迁移环境，基于移动agent技术，对迁移实例进行了研究，提出了一种迁移实例的创建方法。采用构件化技术，将迁移实例体系结构分为本体体系结构与虚拟体系结构。本体体系结构负责实现迁移实例的各功能，因此，我们说其具有实现特性；虚拟体系结构并不实现任何功能，其功能都是引用本体体系结构实现，因此我们说其具有接口特性。通过将本体体系结构当作迁移实例服务放置于可信工作位置，迁移实例仅携带虚拟体系结构进行迁移，既减少了迁移实例的代码规模，实现其轻量化移动，又保证迁移实例的移动计算基本特征。 按照上述迁移实例的创建方法，给出了迁移实例的体系结构以及各部分的实现方法。结合工作流建模方法，我们实现一个迁移实例创建工具。该工具能够按照迁移实例的特性对迁移实例进行建模。所建立的迁移实例可以携带任务说明书，按照工作流程迁移到相应的工作位置并执行任务。试验表明，用该种方法创建的迁移实例具有代码规模小，易迁移等优点。更多还原

【Abstract】 Workflow Management is a technology that can integrate and implement business process automatically/semi-automatically. With its abilities to facilitate man-machine cooperation, simplify task complexity, it has become one of the hottest research issues in many fields such as computer science, automation science, management science and advanced manufacture.Based on the traditional workflow technology, through incorporating mobile computing technology, we can divide the migrating workflow system into three parts: Workflow Engine, Workplace and Migrating Instance. Workflow execution can be interpreted as a process of migrating instance bringing with workflow business process explanation, finding out resources autonomously and migrating to the destination workplace, finishing it’s task and returning back to the home site.Because of the migrating instance, migrating workflow management system becomes more intelligent and more flexible, which makes it more advanced and more sophisticated compared with the traditional workflow. Especially as far as the construction of migrating instance concerned, that how we construct migrating instance, on the one part, can enable it to connect with workflow engine seamlessly; on the other, can avoid the huge sophisticated architecture which makes migrating instance unable to migrate lightly has become an important issue.The migrating instance executes the tasks of migrating workflow management system autonomously. A workflow management system, which manages a business process whether within an organization or cross-organizations, usually works in a specific trusted environment in practice. Based on such assumes, referencing the concept model of migrating workflow, Aiming at this specific trusted environment, using mobile agent paradigm, we have researched migrating instance and proposed a method to construct migrating更多还原