OSGi框架下基于LDAP的异构遥感服务调用机制研究

摘要

针对异构遥感算法服务集成方法在元数据和生命周期管理方面的不足,提出了在OSGi框架下基于LDAP的异构服务调用机制.该机制设计了一个异构服务代理,将并构服务封装为OSGi bundle服务,实现服务生命周期管理,并结合LDAP技术实现异构服务元数据管理;同时引入工作流引擎技术,搭建了一个异构服务交互调用的原型系统.通过遥感NDVI产品生产实验表明,该方法不仅能灵活地调用多种异构的遥感算法服务,且能有效地管理服务元数据及其生命周期.性能分析表明,该方法也为遥感数据分布式处理提供了一种有效的解决方案.%In view of the shortcomings in managing metadata and lifecycle of remote sensing service with the traditional heterogeneous service integration method,this paper proposed a heterogeneous service invocation mechanism based on LDAP under OSGi framework.The mechanism designed a heterogeneous service agent,which could convert the heterogeneous services to OSGi standardized bundle services and implement service lifecycle management.Meanwhile,it combined LDAP technology to achieve a heterogeneous service metadata management.In addition,this paper introduced the workflow engine technology to build a prototype system.Testing NDVI production proves that the mechanism can not only flexibly call a variety of heterogeneous remote sensing services,but also effectively manage their metadata and lifecycle.Finally,performance analysis shows that the method also provides an effective solution for distributed processing of remote sensing data.