| 基于语义P2P的地理共享网络中地理服务发现机制 |
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| 引用本文： | 胡斌,江南,赵钢,王甡,魏清宇.基于语义P2P的地理共享网络中地理服务发现机制[J].地球信息科学,2008,10(2):177-182. |
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| 作者姓名： | 胡斌 江南 赵钢 王甡 魏清宇 |
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| 作者单位： | 1. 中国科学院南京地理与湖泊研究所, 南京 210008;
2. 江苏省水利科学研究所, 南京 210017;
3. 南京大学, 南京 210093 |
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| 基金项目： | 国家科学数据共享工程(2004DKA20180)，中国科学院南京地理与湖泊研究所所长专项基金(NIGLAS2007-05) |
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| 摘 要： | 为了消除集中式SOA系统的"单点故障"问题,本文把语义P2P技术和SOA相结合,不再采用SOA的UDD I进行服务的集中式发布,而是在P2P网络上进行分布式服务发布。通过在语义P2P网络上构建SOA系统,利用P2P的优势进行服务的快速发现和获取,同时也利用地理语义推理解决了地理服务发现中的语义冲突问题。为了实现SOA和语义P2P结合的透明性和平滑性,本文把SOA的服务总线扩展为地理服务总线,地理服务总线基于语义P2P进行服务发现,新的服务发现机制在GSB内部实现,对挂接在GSB上的服务透明,服务间还是按同样的方式交互,因而基于SOA的遗留系统能够平滑升级。通过把地理语义P2P引入SOA,既能发挥SOA在解决大规模分布式异构地理共享系统间的互操作性和服务的透明使用方面的优势,又能利用语义P2P实现地理服务的自动快速发现,从而为大规模的地理共享网络系统建设提供了一条新的思路。
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| 关 键 词： | 语义P2P SOA 地理服务总线 |
| 收稿时间： | 2008-01-26; |
Research on Service Discovery Mechanism of Geography Sharing Network Based on Semantic P2P |
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| HU Bin,JIANG Nan,ZHAO Gang,WANG Shen,WEI Qingyu.Research on Service Discovery Mechanism of Geography Sharing Network Based on Semantic P2P[J].Geo-information Science,2008,10(2):177-182. |
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| Authors: | HU Bin JIANG Nan ZHAO Gang WANG Shen WEI Qingyu |
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| Institution: | 1. Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China;
2. Institute of Jiangsu Provincial Water Resource, Nanjing 210017, China;
3. Nanjing University, Nanjing 210093, China |
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| Abstract: | The advantage of P2P structure is fast at discovering and getting service.And the advantage of GeoOntology Repository is helpful to make semantic reasoning and to solve the conflict of geographical semantics.So,in order to alleviate "single point of failure" of central system based on SOA,this paper combines semantics P2P with SOA to publish distributed web services instead of using UDDI of SOA to central publishing service.By creating the geographical ontology and introducing geographical semantics P2P into SOA,this paper extends the service bus of SOA into geographical service bus(GSB).The service discovery of GSB is based on semantic P2P,and the new service discovery mechanism is implemented in GSB.All these details are encapsulated in GSB,so it is transparent for each service attached to GSB.The communication way among services is the same as the way using SOA.This way can let the legacy system upgrade smoothly.So our prototype not only holds the advantages of SOA on interoperability and transparent use of services under distributed heterogeneous geographical information sharing systems but also utilizes semantics P2P to complete the auto discovery task.Our method also provides an innovative idea for large scale sharing geographial data and services of science data sharing platform. |
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| Keywords: | semantics P2P service-oriented architecture geographical service bus |
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