一种重构带端到端服务质量约束进程的改进算法

摘要

This Paper presents an improved algorithm to resolve the violating of end-to-end quality of service （QoS） constraints,which occurs when SOA processes running with some services＇ wrong.By searching for a reconfiguration region that has replaceable services,the study replaces only faulty services and some of their neighboring services.And the replacements can be implemented with one-to-one,one-to-many,or many-to-one functions mappings,as replacing only services in reconfiguration regions rather than the whole service process,lowers the reconfiguration overheads and the adventures of service disruptions.Finally implements a simulation experiment in the Llama ESB middleware,performance study shows that the algorithm may efficiently repair SOA processes.%阐述一种改进算法以解决由不同服务动态组成的SOA进程运行时,一些服务出错引发进程违背端到端服务质量约束的问题.通过查找具有可替换服务的重构域,替换出错服务及其相关服务.替换可由一对一,一对多或多对一的函数映射来实现,由于只替换重构域中的服务而不是整个服务进程,降低了重构经费和服务进程崩溃的风险.最后在Llama的ESB企业服务总线中进行实验模拟,结果表明该算法能有效地修复SOA进程.