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单词 application server
释义 DictionarySeefile server

application server


application server

[‚ap·lə′kā·shən ‚ser·vər] (computer science) A computer that executes commands requested by a Web server to fetch data from databases. Also known as app server.

application server

(software)A designer's or developer's suite ofsoftware that helps programmers isolate the business logic in their programs from the platform-related code.Application servers can handle all of the applicationlogic and connectivity found in client-serverapplications. Many application servers also offerfeatures such as transaction management, clustering andfailover, and load balancing; nearly all offer ODBCsupport.

Application servers range from small footprint,web-based processors for intelligent appliances or remoteembedded devices, to complete environments for assembling,deploying, and maintaining scalable multi-tierapplications across an enterprise.

application server

(software)Production programs run on a mid-sizedcomputer that handle all application operations betweenbrowser-based computers and an organisation's back-endbusiness applications or databases. The applicationserver works as a translator, allowing, for example, acustomer with a browser to search an online retailer'sdatabase for pricing information.

application server

(hardware)The device on which application serversoftware runs. Application Service Providers offercommercial access to such devices.

Citrix Application Serving White Paper.

Application Server Sites, a list maintained by Vayda & Herzum.

The Application Server Zone at DevX,.

TechMetrix Research's Application Server Directory,.

application server

(1) In a non-Web environment, an application server performs the business logic (the data processing), although some business logic may be handled by the user's machine. See file server.


Three-Tier Client/Server
An application server in a three-tier client/server environment provides middle tier processing between the user's machine and the database management system (DBMS).







(2) In a private or public Web environment (intranet or Internet), an application server hosts a variety of language systems used to query databases. These scripts and services, such as Active Server Pages (ASPs), Java server pages (JSPs) and Java servlets, typically access a database to retrieve up-to-date data presented to users via their browsers or client applications.

The application server may reside in the same computer as the Web server (HTTP server) or be in a separate computer. In large sites, multiple application servers and multiple Web servers (HTTP servers) are used. Examples of Web application servers include BEA Weblogic Server and IBM's WebSphere Application Server. See Web server.


Application Servers & Web Servers
There is overlap between an application server and a Web server, as both can perform similar tasks. The Web server (HTTP server) can invoke a variety of scripts and services to query databases and perform business processing, and application servers often come with their own HTTP server which delivers Web pages to the browser.







Java EE Application Server
Application servers have become the middleware for the enterprise as they provide more hooks into many legacy applications. This is a Java EE-compliant application server running only Java and using Enterprise JavaBeans (EJBs) for the business logic. See EJB.

application server


application server

A server which runs programs that process and display data exchanged with client machines.
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