The Design And Research Of Heterogeneous Data Source Integration

With the coming of Information Society, the issuance of information and E-commerce have been booming. But for an organize or an enterprise, how to integrate all kinds of Data Source that existed and distributed in different area for realizing issuance and shared of information has been an urgent issue. There are many shortages on the performance of portable ^ inter-action and flexibility in data integration area. With the coming and development of CORBA and JAVA, a new method has been brought forward for solving the problem of data integration. The performance will be improved because of their coming.In the paper, A prototype based on CORBA specification has been designed by UML, JAVA and XML. The prototype has five layers, including application layer, global data operation layer, local data operation layer, wrapping data layer, data source system layer. A general data structure is provided in the paper, which can load any data that can be changed into relationship data. Using dynamical type management and two layers mapping of data type gets data from data source and transmits it to client. A kind global query language is defined to query multi-data source, then the result is loaded into wrapper of object. According to the keys which have been defined by client, the data matching is done, so client get the result from heterogeneous source. The system uses a dictionary that is a XML file to support "plug and play " mechanism. The dictionary can be modified via Internet.Because JAVA and XML are independent of platform environment, the code migration is very easy. CORBA can shield the heterogeneity of platform to realize the transparent query to data source by client.