4 WebSphere Application Server V7.0: Technical Overview
Portlet applications
The Portlet container in WebSphere Application Server V7.0 provides the
runtime environment for JSR 268 compliant portlets.
Portlet applications are intended to be combined with other portlets collectively to
create a single page of output. The primary development tool for portlets on
WebSphere Application Server portlet applications is Rational Application
Developer for WebSphere V7.5. You can also use Rational Application Developer
Assembly & Deploy V7.5, which is shipped with WebSphere Application Server.
Portlets are packaged in WAR files. The portlet runtime does not provide the
advanced capabilities of WebSphere Portal, such as portlet aggregation and
page layout, personalization and member services, or collaboration features.
For more information about JSR 286, see the following Web page:
http://jcp.org/en/jsr/detail?id=286
Session Initiation Protocol applications
Session Initiation Protocol (SIP) applications are Java programs that use at least
one SIP servlet written to the JSR 116 specification. SIP is used to establish,
modify, and terminate multimedia IP sessions. SIP negotiates the medium, the
transport, and the encoding for the call. After the SIP call has been established,
the communication takes place over the specified transport mechanism,
independent of SIP. Examples of application types that use SIP include voice
over IP, click-to-call, and instant messaging.
Rational Application Developer Assembly & Deploy V7.5 provides special tools
for developing SIP applications. SIP applications are packaged as SIP archive
(SAR) files, and are deployed to the application server using the standard
WebSphere Application Server administrative tools. SAR files can also be
bundled in a Java EE application archive (EAR file), similar to other Java EE
components.
For more information about SIP applications, see the following Web pages:
JSR 116 SIP Servlet API 1.0 Specification
http://www.jcp.org/aboutJava/communityprocess/final/jsr116/
JSR 116
http://jcp.org/en/jsr/detail?id=116
RFT 3261
http://www.ietf.org/rfc/rfc3261.txt
