Code on demand: Difference between revisions

Revision as of 08:01, 5 April 2008

Revision as of 08:16, 21 May 2008

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In [[distributed computing]], '''code on demand''' is a general term for any technology that sends executable software programs from a server computer to a client computer upon request from the client's software (e.g., browser).

Code on demand is a specific use of [[mobile code]]. A well-known example for the code on demand paradigm are [[Java applet]]s: An applet's program code lies inactive on some [[web server]] until a user (client) requests a web page that contains a link to the applet using histhe client's [[web browser]]. Upon this request, the web page and the applet are transported to the user's machine using [[HTTP]]. When the page is displayed, the applet is started in the browser and executes locally, inside the user's computer until it is stopped (e.g., by the user leaving the applet's web page). This completes the applet's life cycle.

Note that in most cases, the user is not aware that the Web page is downloadeddownloading and is executing mobile code intoon his/hertheir workstation. The user does not "explicitly" or "intentionally" request the mobile code; nor does the user explicitly or intentionally terminate the mobile code.

[[Category:Network-related software]]