Object Oriented Design

Download Developing chemical information systems : an object-oriented by Fan Li PDF

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By Fan Li

Enhance and deal with chemical info systems

this article offers a complete evaluation of examining chemical difficulties utilizing computer-aided tools for either beginners and complicated desktop scientists and chemists. as well as useful how-to details and step by step descriptions, this source contains case stories from Merck & Co., Inc., to extra reduction your understanding.

This advisor covers quite a lot of cheminformatics subject matters, including:
* software program improvement principles
* Object-oriented approach
* development and buying
* Agile and Iterative improvement Process
* UML Modeling
* Deployment and software program Architecture
* Presentation, enterprise, and knowledge patience Layer
* generating an entity dictionary
* Chemistry Intelligence API
* Plug and play--integrating with third-party tools

Written by way of a former lead architect at the layout of acknowledged structures at Merck & Co., Inc., this article not just lays out info, but in addition stocks the author's reports and suggestion on cheminformatics.

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It provides better performance for systems with high user load. • If a Web-based thin client is used, there is no client deployment needed. The updated system is deployed to the middleware only, and the clients can access it easily with a URL from a Web browser. These advantages are not free. Three-tiered architecture has many challenges: • The three-tiered architecture is much more complex than a client–server architecture. • The infrastructure and development cost of three-tiered architecture is higher than client–server.

2 A layered architecture in a Web application and how typically these layers are distributed among the three physical tiers. qxd 46 10/12/2006 8:42 PM Page 46 SOFTWARE ARCHITECTURE Although the J2EE application usually implies a Java Servlet, JSP, and Enterprise Java Beans (EJB) based Web application, it does not mandate the use of EJB. In fact, not using EJB gives you some performance advantages and some programming freedoms. On the other hand, EJB, if used effectively, can ease the development and deployment efforts because the EJB container provides a lot of low-level services to allow you to focus on business logic.

Now we have achieved some code reuse through inheritance by having a class hierarchy. There are other types of reusability, one of which is software components. so (Unix) files. Components with well-designed abstractions can provide reusability for many different software systems. Many commercially or freely available reusable components are developed using objectoriented technologies. The Java Collection Framework is a good example. Service-oriented architecture (SOA) is another software reusability enabler that has become very popular these days.

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