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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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,.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

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.
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References in periodicals archive ?
"You need to treat your customers the same as you do in a brick and mortar environment." He said the internet was experiencing a what he called new phenomenon - the addition of e-commerce based web application servers.
Business Process: the Data Engine as Application Server
To a client or application server, this collection appears as a highly available block-level storage system that provides a large abstract pool of disks, or storage cluster.
Arguably, the most fundamental choice is between Microsoft's .Net architecture, which essentially bundles application server functionality into the Windows operating system, and the Java 2 Enterprise Edition (J2EE) architecture, adopted by suppliers such as BEA Systems, IBM and Oracle for their standalone application servers.
Novera already supports IBM WebSphere and Sun NetDynamics web application servers and says it counts IBM and BEA Systems as its closest competition.
After successfully completing these tests and obtaining the Java Verified license from Sun, the Novell exteNd products are now certified to deploy successfully to any J2EE-compatible application servers.
With a SAN-attached tape library, backup performance would increase by allowing SAN-attached application servers to back themselves up directly to the library.
While other products can only switch/persist on HTTP and SSL packets, the UIE enables BIG-IP software to read all of the HTTP header or payload, and switch/persist on information unique to specific vendor's application server (BEA WebLogic, Microsoft, Oracle 9iAS, etc.), XML data for web services, or on custom values for mobile applications.
Analyst company AMR Research conducted a study into the top eight vendors of application servers, a key piece of infrastructure software that underpins most large ecommerce applications, ensuring high-performance and basic integration with other applications.
Specifically, it will comprise EEI's enterprise financial transaction exchange (e-FTX), Netscape directory and the two application servers offered by the Alliance - Sun's NetDynamics and Netscape's application server.
Application servers traditionally stream data to a tape device.
The Alliance proposes a two stage process for merging its twin application servers into a single platform.

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