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 ?
Evolven Comparison analyzes and classifies configuration changes and differences, by their impact, for IBM WebSphere Application Server. Then Evolven Comparison prioritizes and highlights the changes and differences discovered in IBM WebSphere Application Server based on criticality, visually presenting the comparison results for fast and easy analysis.
Many suppliers, including BEA and IBM, don't charge for their application servers. The code can be accessed on a low-cost CD or downloaded from their websites.
It is not only BEA, however, that has questioned the wisdom of rolling out increasingly wide-ranging and complex application server functionality.
As Brain of Instinet points out, selecting an application server is a tough challenge, involving numerous technological and business criteria.
According to a spokesperson for the company, the AvantGo Pylon Application Server 5.0 for Windows Powered Pocket PC devices is designed to enhance productivity and provide easy access to corporate applications.
In mid 1999, Informix will introduce a new Internet extensible data engine that includes application server functionality to improve the performance and reduce the cost of new, multi-tiered application environments.
In addition to the DA Server, ArchestrA Device Integration (DI) Objects have been created to represent the device and network hierarchy when connecting Siemens S7 PLCs to the Industrial Application Server.
Among plans for the next 12 months will be a drive to sign-up additional ISVs to its open source application server and establish a more formal presence in Asia.
[ClickPress, Mon Oct 15 2018] Voice Application Server Market: Overview Voice application server is an advanced end-to end VOIP (voice over IP) platform.

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