Research And Implementation Of Three-ties Construction Model Based On COM

Data persistency. Concurrency, Flexibility, Security, Transaction and Deployment aboutapplication are often met when developing distributed systems. In the region of distributed computing, there are lots of application models occurred to meet the request of business. At the beginning of 1990's, the model of two ties Client/Server(C/S) is very popular in the application of local network. This model can work well in the situation with 5, 10 or 100 users. But, with the development of Intranet/Internet and all kinds of new technology, this model can't adapt the needs of complicated business regulation and increment of users. Facing these problems, this paper will give a popular application model, three ties construction based on component, to explain the superiority when contrasting with conventional distributed computing method. And with Microsoft's DNA construction as a plan, we will understand the great role of three ties construction based on component in distributed application.This paper mainly explains the core technology of Windows DNA,MTS(Microsoft Transaction Server).MTS provides a very simple programming model and the function of automatic service, such as thread pool,concurrency management,transaction management,scale controlling and database connection pool, for the middle tie of three ties construction. These make developer can focus their energy on creating business components according to the business requirement as these components will be used for single user.At the last of this paper, a practical application, Wu Han Iron And Steel Design And Research Institute medical insurance system, will be provided to describe how to deal with practical problem with MTS effectively.