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© Copyright IBM Corp. 2009. All rights reserved. ibm.com/redbooks 1

WebSphere Application Server V7.0:

Technical Overview

WebSphere® Application Server is the implementation by IBM® of the Java™

Platform, Enterprise Edition (Java EE) platform. It conforms to the Java EE 5

specification. WebSphere Application Server is available in unique packages that

are designed to meet a wide range of customer requirements. At the heart of

each package is a WebSphere Application Server that provides the runtime

environment for enterprise applications.

This discussion centers on the runtime server component of WebSphere

Application Server.

For more information about topics discussed in this paper, refer to the IBM

Redbooks® publication WebSphere Application Server V7: Concepts, Planning

and Design, SG24-7708.

Arden Agopyan

Hermann Huebler

Tze Puah

Thomas Schulze

David Soler

Martin Keen

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

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