| With the proceeding of informationization, lots of independent authentication systems and multiple methods of logining are adapted by various applications. In order to integrate these methods, the web portal that maps username and password to another one, is used to implement unified authentication. However, authentication system stores identity information independently.When user information changes, it have to modify indentiy data for every authentication system which will make data inconsistent.To solve the above problem, its necessary to study on the methods of the data synchronization in authentication systems to realize the consistency and intergration of identity data.On the basis of researching data capture, data exchange and SOA architecture, the thesis investigate how to use SOA to construct a heterogeneous data synchronization platform against specific demand, and then designed the architecture of this platform based on web service and XML.The Whole architecture consists of three-layer structure, which includes a data layer,a logic layer and a web service layer.the logic layer,the core of the entire framework,deployed in source node and target node,helps to exchange data in source database and distination database. The Heterogeneous of data sources is cleared up due to the use of XML as the mediumin of data source. Web service envelopes the detail of update operation on target database.The use of web service clears up the heterogeneous of operating system and development platform, and the coupling in systems is reduced.According to the requirement of authentication systerm in xicheng district, After constructing a identity data center and a mamangement system base on B/S for it, XML and SOAP extension of PHP is used to construct a heterogeneous database synchronization platform based on the architecture propose above. The platform can synchronize data between data center and local authenticarion system. At last, implemts a information management system for data center. |
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