Design And Fuifillment Of Data Access Middleware In Marine Geology Data Integration And Service System

In order to share resource better, eliminate the structural isomerism, solve theisolated information island, it is necessary to find a solution to consistently manageand operate the distributed data. Hence, launches the project of Implementation ofMarine Geology Data Integration and Service System, to harmonize the access,storage and integration of isomerous database, to provide application and servicesbased on database integration. Under the project, set up the subject of MiddlewareDesign and Realization of Data Access in Marine Geology Data Integration andService System, to convert the physical data model to standardized logical model, toprovide database service. The subject is the key part in the whole project, is the baseto realize the access of distributed data and integration of isomerous data.Marine Geology Data Access Middleware realizes the mapping of physicalmodel and standardized logic model, realizes the object to relational databasemapping. It separates the business logic structure and database storage, suits thedistribution application, and provides perfect service for upper layer application.This subject covers the following parts and steps:1. Demand analysis for Marine Geology Data Access Middleware, fromcurrent marine geology database establishment status, purpose andprinciple of marine geology database integration.2. Study overall structure and model structure of Middleware of MarineGeology Database Access, determine the method, frame and technology tocomplete the Marine Geology Data Access Middleware.3. Focus on detailed design of Marine Geology Data work model and logicalmodel, acknowledge the work flow chart, analyze and design work model,design the oriented object standardized logic model of marine data, designdata contract, define the interface of object access.4. Develop the Marine Geology Data Access Middleware based on.NET platform, including mapping between logic model and physical modelbased NHibernate; compile configuration file to realize of construction andmanagement of WCF service; realize the object transfer between differentplatform. Complete the data service release testing, object and the objectattribute quest testing.