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30 Ιουλ 2012 (πριν από 5 χρόνια και 2 μήνες)

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Get a New Window on Your iSeries with a Portal


Author: Kevin Larsen
-

IBM


A
portal

is a secure, single point of access on the Web where you can access information,
applications, business processes, and people. A portal can be personalized to a particular

type of
user in a business or virtual organization to give them the tools and resources they need in an
easy to access environment. Figure 1 illustrates an IBM hosted WebSphere Portal demo
available at
h
ttp://wp50.dfw.ibm.com/.


Figure 1

A Web portal can be conceptualized as a desktop much like a Personal Computer pr
ovides, with
various applications available within ‘windows’ displayed on the desktop. These browser
-
based
windows are called portlets. They act as visual components that bring applications and
information to the portal.

In technical terms, portlets are cu
stomizable Java Servlets that can access existing resources
such as ERP systems, collaboration products such as Lotus Domino, other Web applications
deployed in the enterprise, or Web Services hosted within or outside a business. Portlets within a
portal a
re either provided by a third party or custom built to unique requirements.

IBM’s WebSphere Portal family of products is middleware that helps you build and deliver a portal
to your users. IBM has extended WebSphere
-

Express to include WebSphere Portal. D
esigned
specifically for small to medium sized businesses, the Express WebSphere products are entry
-
level solutions that help you get your business on the Web. With WebSphere Portal


Express
Version 5, you can:



Develop
, test and deploy a portal with WebS
phere Studio Site Developer, Version 5.1
and the IBM Portal Toolkit application development tools.



Integrate

collaboration capability into a portal using Lotus collaborative portlets that
access various applications hosted on Lotus Domino servers such as
Mail, Calendar,
TeamRoom, and Discussion.




Enhance

custom portlets by seamlessly integrating your existing Lotus Instant Messaging
(Sametime), Lotus Team Workplace (QuickPlace), and Lotus Discovery Server assets
using the Lotus Collaborative Components API
s.




Serve

the portal to users with the WebSphere Portal framework and supporting
WebSphere Application Server.

It also includes the following:



Restricted use licensing for the Lotus Domino Enterprise Server, Sametime, and
QuickPlace products.




Collaboratio
n Center, an environment that offers integrated collaboration capabilities
among a set of defined users, such as virtual presence monitoring, organization structure
and user information, instant messaging, Web conferencing, and team workplaces.

Although it

is part of the WebSphere Express family of products, WebSphere Portal


Express
Version 5 is not compatible with WebSphere Application Server


Express, Version 5.0. However,
WebSphere Portal
-

Express Version 5 includes its own restricted
-
use license of
WebSphere
Application Server, so you don’t need to buy WebSphere Application Server separately.

With WebSphere Portal


Express Version 5, an administrator makes portlets available for end
users, who may then customize them. And with single sign
-
on technol
ogy, users only need to
authenticate once with the portal rather than individually to each individual portal resource.

Portlets also can share information and collaborate with WebSphere Portal’s Click
-
to
-
Action. This
feature allows an action in one portlet

to have an effect on the information displayed in another
portlet. For example, suppose a portlet lists stock prices for a variety of companies. By clicking a
company in the list, the portal can instruct a second portlet to display detailed information on

the
selected company.

To reap the benefits of a portal environment, you need a strategic analysis. Among other things,
this analysis involves a determination of the portal’s architecture and the portlets it will provide.
For iSeries customers, a potential

first portal is a consolidation and integration of existing key
iSeries assets, such as RPG and COBOL applications and DB2 data, into an Intranet portal for
corporate employees.

These assets are traditionally accessed through a 5250 green
-
screen or client
-
server interface.
However, they must first be accessible from a Web browser before they can be incorporated into
a portal. You can:



Portal
-
enable all of your host 5250 applications with the latest version of iSeries Access
for Web. The iSeries Access for
Web 5250 emulator has a portlet that integrates into
WebSphere Portal


Express Version 5. The other functions in iSeries Access for Web
can also be used in this environment as iFrame portlets.




Modernize your 5250 applications using enterprise
-
modernizati
on products from IBM
such as WebSphere Host Access Transformation Services (HATS), or The IBM
WebFacing Tool, each of each which provides a supporting portlet.




Consult your Independent Software Vendors (ISVs) on their plans for providing
WebSphere Portal
support for their application suite.


WebSphere Portal


Express Version 5 licensing only lets you deploy portlets. If you want to
create hosted Web applications that are accessed by portlets you must buy another WebSphere
Application Server, such as WebS
phere Application Server


Express for iSeries, Version 5.

After you define the technical aspects of a portal, you must ensure that the iSeries server is
configured appropriately for best performance. WebSphere Portal


Express, Version 5 requires a
minimu
m of 750 CPW and 2GB of available memory, however, this configuration may not give
you enough resources for your intended portal.

To help define an appropriate iSeries configuration, IBM provides the eServer Workload
Estimator. This no
-
charge, Web
-
based to
ol gives you an estimate of an iSeries configuration that
will support the performance requirements of one or more iSeries workloads, such as traditional
5250, WebSphere applications (such as IBM WebFacing, WebSphere Commerce, and
WebSphere Portal
-

Expres
s), Lotus Domino, and more. For help in estimating your configuration
needs, contact your IBM Business Partner or IBM Sales Representative.

If you want, a virtual environment that empowers employees, customers, and partners with tools
they need to more eff
ectively leverage business information and IT assets, a portal may be the
answer. WebSphere Portal


Express Version 5 offers new capabilities for iSeries customers and
their existing iSeries investments. For additional information, consult the following W
eb
resources:



WebSphere Portal for iSeries


http://www.ibm.com/servers/eserver/iseries/software/websphere/portal




IBM eServer Workload Estimator

http://www.ibm.com/iseries/support/estimator




IBM WebSphere Portal Catalog

http://www.ibm.com/developerw
orks/websphere/zones/portal/catalog/


Kevin Larsen is an Advisory Software Engineer at IBM in Rochester, Minnesota. For the past 5
years, he has educated IBM eServer iSeries customers on WebSphere products and
technologies, architecture design and implem
entation. Kevin can be reached at
kevlars@us.ibm.com