application server

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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 of software that helps programmers isolate the business logic in their programs from the platform-related code. Application servers can handle all of the application logic and connectivity found in client-server applications. Many application servers also offer features such as transaction management, clustering and failover, and load balancing; nearly all offer ODBC support.

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

application server

(software)
Production programs run on a mid-sized computer that handle all application operations between browser-based computers and an organisation's back-end business applications or databases. The application server works as a translator, allowing, for example, a customer with a browser to search an online retailer's database for pricing information.

application server

(hardware)
The device on which application server software runs. Application Service Providers offer commercial 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.
References in periodicals archive ?
Like ContextMedia, Venetica's application runs in a J2EE appserver.
Todos los componentes de Progress Open AppServer corren en una sola estacion de trabajo, NT o UNIX, con la intencion de tener un procesamiento mucho mas rapido o en diversos dispositivos para aprovechar las capacidades de recuperacion.
5 of its Borland AppServer application server product.
Nance said Unify can demonstrate how to link multiple Oracle, Informix and SQL Server databases into a Web commerce page in under ten minutes using WebNow, which will be bundled free with Vision AppServer for Linux.
1B of the Progress AppServer uses HTTP tunneling to communicate with the Progress WebClient and other 4GL clients through firewalls that often limit communications to HTTP.
Application tracks will also give examples of Thin Clients running with software such as InTouch, GE Proficy Products, DeltaV, AppServer and RSView.
TELECOMWORLDWIRE-13 December 2000-Inprise introduces latest version of Borland AppServer (C)1994-2000 M2 COMMUNICATIONS LTD http://www.
1B of the Progress AppServer user HTTP tunneling to communicate with the Progress WebClient and other 4GL clients through firewalls that often limit communications to HTTP.
The Linux compliant product line, which includes the company's Open AppServer and RDBMS relational applications database, is now under development, the company said, and products should ship in the fall.
Now Unify Vision AppServer and AppBuilder, DataServer ELS and Accell IDS are to be rolled out.
Unify Corp says that WITH Systems, a leading Japanese VAR, has selected Unify's VISION AppServer and AppBuilder products to develop an enterprise Internet application for the Japanese Ministry of International Trade and Industry (MITI).
NGASI AppServer Manager automates multiple installations and configurations for GlassFish v3 on a single server machine, across multiple VPS (Virtual Servers), and across multiple servers.