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 ?
PIT technology provides time/data consistent application mount points for application servers.
Oracle9i Application Server features full J2EE support, built-in enterprise portal software, high-speed caching, business intelligence, rapid application development, application and business integration, web services and more, all in one package.
The IDC study, Worldwide Application Server Software 2006-2010 Forecast and 2005 Vendor Shares (IDC #204706), provides 2005 vendor shares and a 2006-2010 forecast for the application server software platform markets, as well as a detailed look at the two functional markets within the ASSP segment.
These functions are now moving into the SAN itself, either through intelligent switches or appliances designed to provide a common layer of storage services across various application servers and storage systems within the SAN.
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.
A re-implementation of JBossMQ, JBoss Messaging can be used with JBoss Application Server 4.
Designed to address the architectural gap between the application server and the application's business logic, the Wakesoft Architecture Server eliminates the pain, complexities, and excessive costs of constructing, deploying and managing distributed enterprise applications.
This improves overall application server performance as well as abstracting the complexity of the database from each web application and its components.
Some vendors are using a new breed of easy to use development tools to differentiate their application servers allowing application deployment to their company's application server.
Tekelec's market-leading application server supports the largest number of calls per second and is one the most cost-effective solutions on the market today.
Over the past year, the JBoss Application Server has experienced a powerful surge in adoption among enterprises worldwide," said Marc Fleury, chairman and CEO of JBoss, Inc.

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