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An overview of com+, a component model and application server platform on windows 2000. It covers the major features of com+, including integrated transactions, object pooling, queued components, and com+ events. The document also discusses how these features work and their benefits, such as database connection pooling, process isolation, and asynchronous capabilities.
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HTTP 1.1(Hypertext Transfer Protocol)
Common Gateway Interface (CGI)
Web Distributed Authoring Versioning WebDAV (World Wide Web Distributed Authoring and Versioning) is the Internet Engineering Task Force (IETF) standard for collaborative authoring on the Web: a set of extensions to the Hypertext Transfer Protocol (HTTP) that facilitates collaborative editing and file management between users located remotely from each other on the Internet. WebDAV is expected to have an impact on the development of virtual enterprises, by enabling remote groups to work together in new ways. For example, WebDAV- conforming tools could be used by a virtual organization to develop business plans, create software, or write libraries of information. The WebDAV work group is part of the applications section of the World Wide Web Consortium (W3C); their charter states its goal as to "define the HTTP extensions necessary to enable distributed Web authoring tools to be broadly interoperable, while supporting user needs." WebDAV is expected to fulfill early expectations of the Web's collaborative potential, by adding write access to the read access afforded by HTTP. WebDAV will enable users to collaborate over the Web in the same way as they might over a corporate intranet.
Customer Information Product Information Credit Information Shipping Information
Object pooling is an automatic service provided by COM+ that lets application developers configure a component so that instances of it are kept active in a pool, ready to be used by any client that requests the component. Developers can administratively configure and monitor the pool maintained for a given component, specifying characteristics such as pool size and creation request timeout values. Once the application is running, COM+ manages the pool, handling the details of object activation and reuse according to pre-specified criteria.
The Queued Components feature takes advantage of Microsoft Message Queuing Services (MSMQ) to let server components logically participate in transactions while unavailable or offline. This allows standard COM components to use MSMQ to deliver asynchronous capabilities. While developers can use MSMQ to write applications that use the capabilities provided by queued components, such development is relatively labor-intensive. Programming with queued components is much faster, and does not require the developer to learn new techniques.
Transaction service
Data Customer Information Product Information Credit Information Shipping Information Web Server Shipping Server Credit Processing Server Product Inventory Server Customer Information Server Client Order Form
Data Customer Information Product Information Credit Information Shipping Information Web Server Shipping Server Credit Processing Server Product Inventory Server Customer Information Server Request and Response Queues Client Order Form
MSMQ Features