一种基于XML的可变粒度冲突避免策略

An Alterable Granularity Collision Avoidance Strategy Based on XML

针对协同设计过程中的数据一致性问题,分析了已有的并发冲突避免策略,结合CATIA的特殊性提出了一套可变粒度锁的冲突避免策略,设计了总体框架及核心算法.以节点间关联性作为判断依据进行节点仲裁选择,并提出节点关联集的维护算法.在协同设计平台中,利用XML实现并发控制机制,对提出的算法进行了实验,验证了用户可互斥地访问对象,并保证一致性.

Aiming at the problem of data consistency in collaborative design, the paper analyzes the available strategies of subsequent collision avoidance, puts forward one collision avoidance strategy of alterable granularity lock by combining with the particularity of CATIA. It designs the global frame and kernel algorithm. It adopts relevancy of nodes as the de- ciding criterion to arbitrate and choose nodes, and puts forward the algorithm of maintaining node relevant aggregation. In the collaborative design platform, XML is used to carry out the subsequent control mechanism, and the proposed algo- rithm. The experiment indicates that user can access model resource mutually exclusively and ensure the consistency.