IBM Power Systems™
Agenda Key:
Session Number:
Presenting RPG Web Service Business Logic
Web Services and SOA for the RPG Developer on IBM i
Dan Hiebert IBM [email protected]
8 C o pyright IB M C orpo ration, 2 008 . A ll R ights R eserved.
T his publication m ay refer to pro ducts that are not currently
available in your co untry. IB M m akes no com m itm ent to m ake
available any prod ucts referred to herein.
IBM Power Systems
Agenda
• Introduction to SOA & Web Services
• Creating RPG Web Service Business Logic.
– Lab Time
• Deploying/Testing RPG Web Services.
– Lab Time
• Consumption of Web Services.
– Lab Time
• Presentation Layer of Web Services.
– Lab Time
© 2008 IBM Corporation
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Presentation RPG Web Service
Business Logic
• IBM i Web - Presentation Technologies’
• Basics of Web Technologies
– HTTP / Servlets
– JSP
• Demo - JSF
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How Did We Get Here over 20 years?
• Evolution of the Web
– Document-centric =>
• Application-centric =>
– Service-centric
Static Web Applications
Dynamic Web Applications
Web Services
Portlet Applications
© 2008 IBM Corporation
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Web Service – Web Presentation Technologies
IBM i – Web Service - Key Technologies
Web Development Tools
• WDSc V7
• RDI
• RDI – SOA
Web Server Runtime
• Apache HTTP
• IBM Integrated Web Application Server for i
• WebSphere Application Server
– Java Server Pages (JSP)
– Java Server Faces (JSF)
• WebSphere Portal
• PHP
– Scripting Language
– Web service Support
Other Platforms
• .NET/C#
• Lotus Expeditor
• Mashup Servers
• Portal
© 2008 IBM Corporation
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Web applications Technologies
• JavaServer Faces (JSF) is a framework for building Web applications
• JSF is an evolutional step in Web application frameworks
development, it builds on Servlet API and JSPs technologies
Functionality
PHP
Servlets
HTML
(Hyper Text
Markup Language
JSP
(Java Server
Pages)
JSF
(Java Server
Faces)
Better architecture, RAD, easier maintenance
© 2008 IBM Corporation
IBM Power Systems
What is Hypertext Markup Language (HTML)?
• An open standard
– Developed by the World Wide Web Consortium (W3C)
• A language used to format text and objects (such as images) to be
displayed in a Web browser
– The display language of a browser
• Static—it is only display.
– Use other technologies to add dynamic function:
• Client-side (browser) scripting languages (JavaScript)
• Server-side programs (CGI, Java servlets, PHP)
• The user interface language of the Web.
© 2008 IBM Corporation
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Two parts to HTML
Source code
Text/HTML editor
HTML files are flat-text files that
have a .html (or .htm) extension.
Display
Browser
When you open an HTML file
with a browser, the code is run.
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Basic HTML syntax
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HTML syntax
• Tags
– Instructions for the browser
<tag>Some text</tag>
• Nesting
– Close tags in the opposite order in which you opened them.
<tag1><tag2>Some text</tag2></tag1>
• Attributes
– Specify attributes to use non-default behavior
<tag attribute=“value”>Text</tag>
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HTML document structure
<html>
<head>
(Header: information about the page)
</head>
<body>
(Body: Web page content)
</body>
</html>
© 2008 IBM Corporation
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Header (<head>)
• Content within the <head> tags is not displayed in the browser.
• Optionally, contains information about your Web page.
– <meta name=“author” content=“Tim Rowe”>
• Optionally, contains non-HTML code for your Web page
– JavaScript, Cascading Style Sheets, etc.
• Contains the title of the Web page
– Optional, but recommended
© 2008 IBM Corporation
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Header (<head>)
• Use the <title> tag for the title of the page
<html>
<head>
<title>Ima Geeke’s Resume</title>
</head>
. . .
</html>
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Body <body>
• The contents of the Web page (mainly text)
–
–
–
–
–
–
–
–
Headings
Paragraphs and line breaks
Text formatting
Lists
Links and images
Tables
Fonts and colors
Comments
• The tags described in the rest of the session occur in the <body> section
© 2008 IBM Corporation
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Headings
• <hx> - x is a number from 1 to 6
• <h1> is the biggest
• <h6> is the smallest
<body>
<h1>Ima
<h2>Ima
<h3>Ima
<h4>Ima
<h5>Ima
<h6>Ima
</body>
Geeke</h1>
Geeke</h2>
Geeke</h3>
Geeke</h4>
Geeke</h5>
Geeke</h6>
© 2008 IBM Corporation
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Paragraphs (<p>)
• Adds a line feed after a line.
<body>
<h1>Ima Geeke</h1>
<p>123 State Street</p>
<p>Rochester, MN 55901</p>
<p>(507)555-1212</p>
<p>[email protected]</p>
<p>Objective: To get a really
sweet job.</p>
</body>
© 2008 IBM Corporation
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Line breaks (<br>)
• Add a line break.
<h1>Ima Geeke</h1>
<p>123 State Street
<br>Rochester, MN 55901
<br>(507)555-1212
<br>[email protected]</p>
<p>Objective: To get a
really sweet job.</p>
© 2008 IBM Corporation
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Bold, Italics, and Underline (<b>, <i>, <u>)
<p>123 State Street
<br>Rochester, MN 55901
<br>(507)555-1212
<br><u>[email protected]</u></p>
<p><b>Objective:</b> To get a
really <i>sweet</i> job.</p>
© 2008 IBM Corporation
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Lists
• Unordered list (UL) with list items (LI)
<ul>
<li>Item</li>
<li>Item</li>
</ul>
• Ordered list (OL)
<ol>
<li>Item 1</li>
<li>Item 2</li>
</ol>
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Lists
<p>Languages:</p>
<ul>
<li>RPG</li>
<li>COBOL</li>
<li>Java</li>
</ul>
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Links (<a href>)
• Use the anchor tag (<a>) with required hyperlink reference (HREF)
attribute
– Local file:
<a href=“rpg.html”>RPG</a>
– Full URL:
<a href=“http://java.sun.com”>Java</a>
– E-mail address
<a href=“mailto:[email protected]>….</a>
© 2008 IBM Corporation
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Links (<a href>)
<br><a href="mailto:[email protected]">[email protected]</a>
</p>
. . .
<p>Languages:</p>
<ul>
<li><a href="rpg.html">RPG</a></li>
<li><a href="cobol.html">COBOL</a></li>
<li>
<a href="http://java.sun.com">Java</a>
</li>
</ul>
© 2008 IBM Corporation
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Images (<img src>)
• Use the image (IMG) tag with required
source (SRC) attribute:
– Local file
<img src=“mypic.gif”>
– Full URL:
<img src=“http://www.ibm.com/c.gif”>
• No closing tag (</img>)
<h1>Ima Geeke</h1>
<img src=“mypic.gif”>
© 2008 IBM Corporation
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Tables
• Use the <table> tag as a container for the table
contents.
<table></table>
• By default, there is no border, so use the border
(BORDER) attribute:
<table border=“1”></table>
• HTML tables are row-major ordered. Define the
rows with the table row (TR) tag:
<table border=“1”>
<tr></tr>
<tr></tr>
</table>
© 2008 IBM Corporation
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Tables
• Use the table heading (TH) and table data (TD) tags to define the cells in
a row:
– <th>: Content is bold and centered
– <td>: Content is not bold and left-justified
• You can have both <td> tags and <th> tags in the same row.
• The browser will resize the table to fit the contents.
– Manually size the table, rows, and cells with the WIDTH and HEIGHT
attributes.
– Values are pixel widths or percentages.
• <td width=“10”>…</td>
• <tr height=“50%”>…</tr>
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Tables
<p>Education:</p>
<table border=“1”>
<tr>
<th>School</th>
<th>Degree</th>
</tr>
<tr>
<td>PC University</td>
<td>B.A. 1985</td>
</tr>
</table>
© 2008 IBM Corporation
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Positioning text
• Use the ALIGN attribute to position text. Values are RIGHT, CENTER,
and LEFT.
<p align=“right”>
<td align=“center”>
<th align=“left”> (default is center)
<h1 align=“right”>
<img src=“mypic.gif” align=“right”>
• Most tags take the ALIGN attribute.
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Positioning text
<h1>Ima Geeke</h1>
<img src="mypic.gif"
align="right">
. . .
<p align="center">
<b>Objective:</b> To get a
really <i>sweet</i> job.</p>
© 2008 IBM Corporation
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Positioning text
• Use an “invisible table” to position
text into columns.
<table border=“0” width=“100%”>
<tr>
<td>(Left column)</td>
<td>(Right column)</td>
</tr>
</table>
• The number of <td> tags is the
number of columns.
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Fonts
• Use the FONT tag
– FACE attribute: Change the font
type.
• Common types:
– Times New Roman (default), Arial,
Courier, Verdana, Sans Serif,
Script
• Choices are based on what is
installed on the user’s system
– SIZE attribute: Change the size of
the text.
• size=“x”
– x is a number between 1 and 7
(default is 3)
<h1><font face=“script” size=“7”>Ima Geeke</font></h1>
© 2008 IBM Corporation
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Colors
• Use the BGCOLOR and COLOR attributes to change the default colors.
• Color values:
– Simple names: black, blue, white,
red, yellow, etc.
– Hexadecimal values: #RRGGBB
(amount of red, green, and blue)
– See
http://www.w3schools.com/tags/ref_colorn
ames.asp for a list of named and hex
values.
<body bgcolor="#FFFFAA">
<h1><font face="script" size="7" color="green">Ima
Geeke</font></h1>
© 2008 IBM Corporation
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HTML in a Web server environment
HTML
HTML
Response
HTML
Client
`
Server
Request
http://<server_name>/file.html
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HTML forms
• HTML forms support Web
programs:
– By gathering input data from the
user
– By sending the request that
causes the Web server to invoke
the program
• Data is sent to the server in
name/value pairs.
© 2008 IBM Corporation
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Forms (<form>)
• Container for form elements
• Tells the Web server what to do with the request
– ACTION attribute
• The location of the Web program (full or partial URL or an alias)
– METHOD attribute
• GET
– Web server stores data in an environment variable
• POST
– Web server stores data in a buffer
<form action=“/request.jsp” method=“post”></form>
© 2008 IBM Corporation
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Form elements
• Used to gather specific pieces of data from the user.
• Attributes we need to use on the form elements tags:
– NAME attribute
• Specifies a name for a piece of data
– VALUE attribute
• Available on selection elements
• Allows the return value to be different than the display text
• Most form elements are defined with the INPUT tag.
– TYPE attribute
• Specifies the type of form element
© 2008 IBM Corporation
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A brief Servlet Intro
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What is Servlet?
• Request/response model
1. Collect information on an HTML page
2. Invoke business logic from a servlet
3. Display results on an HTML page
HTML
Servlet
Business
Logic
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Servlet Drawback
• Drawbacks
– Maintenance problems: HTML is embedded in servlet code
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JSP (Java Server Pages)
© 2008 IBM Corporation
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Java Web applications
•
Java Web applications consist of
–
–
–
Presentation layer: combination of HTML and other technologies
Server component: servlets
Business logic: written in Java or other programming languages
•
Most business logic (request processing) is executed on the server
•
Client-side processing is accomplished with JavaScript
•
Java Web applications run in an Application Server (WebSphere Application Server, Tomcat, etc.)
Presentation
HTML
JavaServer
Pages
Runs on Server
Business Logic
Servlet
JavaBean
RPG/COBOL
DB2
Runs in an Application Server
Runs on i5/OS
© 2008 IBM Corporation
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JSP (Java Server Pages)
• Better architecture than Servlet API
– Model-View-Controller (MVC) pattern: separation of presentation and
business logic (HTML code is not in a servlet)
– Code reuse
– Easier to maintain
View
Controller
JSP
JSP
JSP
Model
JavaBean
RPG/COBOL
JavaBean
DB2
Servlet
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JSP Background
•Combines HTML, XML and Java Servlets
•Presentation Layer Separate from Business
Logic
•Dynamic Content on Server
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What is a JSP
• HTML Programmer View
– JSP is extension of HTML
– Dynamic HTTP Content
– JavaBean embedded technology
• Java Programmer View
– High Level Way to write Servlets
– Easier HTML scripting than embedding HTML in Servlets
– Dynamic Compile for JSP’s
• JSP Misconception
– Not Javascript like – (Run on Browser)
– Translated into Servlet and run on Server side
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HelloWorld1.jsp - Simple JSP
<HTML>
<HEAD><TITLE>Hello World JSP Example</TITLE></HEAD>
<BODY>
Hello World.
</BODY>
</HTML>
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HelloWorld2.jsp Dynamic JSP
<HTML>
<HEAD><TITLE>Hello World JSP Example w/Current
Time</TITLE></HEAD>
<BODY>
Hello World. The local server time is
<%= new java.util.Date() %>.
<jsp:expression> new java.util.Date() </jsp:expression>.
</BODY>
</HTML>
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HelloWorld3.jsp - Directives
<jsp:directive.page import="java.util.Date"/>
<HTML>
<HEAD><TITLE>Hello World JSP Example w/Current
Time</TITLE></HEAD>
<BODY>
Hello World. The local server time is <%= new Date() %>.
</BODY>
</HTML>
© 2008 IBM Corporation
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HelloWorld4.jsp - 3 Code Comments
<jsp:directive.page import="java.util.*"/>
<jsp:declaration>
/* date is a new member variable, initialized when we are instantiated.
It can be used however we want, such as:
out.println("Instantiated at " + date); // display our "birth" date
*/ Date date = new Date();
</jsp:declaration>
<!-- The time is <%= new java.util.Date() %> -->
<%-- This is our oft-repeated Hello World example: --%>
<HTML>
<HEAD><TITLE>Hello World JSP Example</TITLE></HEAD>
<BODY>
Hello World.
</BODY>
</HTML>
© 2008 IBM Corporation
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JSP Based Application
Web-
2
JSP
Server
HTTP
Server
4
5
3
Java
DB2
*PGM
*SRVPGM
HTTP
1
1
url
request
2
3
4
5.
User makes a Web application request &
HTML form is displayed on the browser
User enters data and clicks ‘Submit’, which
invokes the JSP
JSP performs processing, invokes any
enterprise applications or data
JSP accesses the results, formats response,
returns ouput to the Web Server
Web server returns results to the browser
© 2008 IBM Corporation
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Introduction to JSP Reference Material
– IBM DeveloperWorks
http://www.ibm.com/developerworks/edu/j-dw-jsp-i.html
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JSF (Java Server Faces)
© 2008 IBM Corporation
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JavaServer Faces: Overview
• JSF enhancements to JSP/Servlet API
–
–
–
–
More built-in Java classes
More tag libraries
Better tooling in IBM tools (WebSphere Studio and Rational)
AJAX integration
JSF
Struts
JSP/Servlet API
Servlet API
© 2008 IBM Corporation
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Developing JSF applications
• Designing JSF applications
– Follow Model-View-Controller (MVC) design pattern
•
•
•
Model (business logic): JavaBeans, EJBs or Web Services
View (user interface): JSPs with JSF components
Controller: no programming required, JSF framework implements the controller
– Access i5/Os programs, functions and data in the “Model” part of the
application
View
Controller
Model
JavaBean
JSPs
Faces
Servlet
RPG
COBOL
JavaBean
Database
© 2008 IBM Corporation
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Any questions?
© 2008 IBM Corporation
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Demo JSF Technologies
© 2008 IBM Corporation
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Web Service - Data components
• How it works:
1. Drag and drop components from the Palette
Web Service
2. Select fields to display
3. Add Selective Information
JSF Web service client demo
1.
Create JSF pages
2.
Add Web service JSF component
© 2008 IBM Corporation
IBM Power Systems
14.
© 2008 IBM Corporation
IBM Power Systems™
Agenda Key:
Session Number:
Extended Web Services Technologies
Web Services and SOA for the RPG Developer on IBM i
Dan Hiebert IBM [email protected]
8 C o pyright IB M C orpo ration, 2 008 . A ll R ights R eserved.
T his publication m ay refer to pro ducts that are not currently
available in your co untry. IB M m akes no com m itm ent to m ake
available any prod ucts referred to herein.
IBM Power Systems
Web Services Technologies and Development Tools
IBM i Web Services Runtimes / Technologies
• IBM Integrated Web services for i
• WebSphere Application Server
– Java Server Pages (JSP)
– Java Server Faces (JSF)
– Host Access Transformation Services (HATS)
• PHP
IBM i Web Service Development Tools
• WDSc V7
• Rational Developer for i (RDi) – Web Services Wizard
• Rational Developer for I – SOA (RDi –SOA)
• HATS Tools
IBM i Advanced SOA Technolgies
• WebSphere Enterprise Service Bus (WESB)
• WebSpehre Process Server (WPS)
• WebSphere Integration Developer (WID)
Other Platform Web service Technology’s
• .NET/C#
• Lotus Expeditor
• Mashup Servers
• Portal
© 2008 IBM Corporation
IBM Power Systems
Rational Developer for I (RDI) &
WebSphere Application Server
© 2008 IBM Corporation
IBM Power Systems
Web Service Wizard in RDi SOA
• Web Services wizard in RDi SOA generates a Web Services wrapper for a
program or service program procedure
– Program or procedure must be able to run as batch
– Generated Web Service wrapper is deployed onto WebSphere Application Server or
the Integrated Web Application Server for IBM i Operating System
• Does not have to be deployed onto the same server as the program or service program
Example program
to be called
Start the wizard by
right-clicking on
member in the RSE
and selecting Web
Services > Create
Web Service
© 2008 IBM Corporation
IBM Power Systems
Web Service Wizard
 Select the blue hyperlinks to
change the Web Application
Server, Web service runtime,
J2EE version, or Web project
 The Service project and
Service EAR projects are the
location where wizard
generates files related to the
Web Service
 If a Service project or EAR
project does not exist, it will be
created for you!
© 2008 IBM Corporation
IBM Power Systems
Host Access Transformation Services (HATS)
© 2008 IBM Corporation
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Host Access Transformation Services
(HATS) Web Service creation overview
Create a HATS project
Setup Development environment
Define host connections
Create Macros
Navigate host screens
Define input parameters & output data
Connect, data, disconnect macros
Optionally Set up session pooling
© 2008 IBM Corporation
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HATS Web Service Creation Overview - Continued
Create an Integration Object
Defines the programming interface to the
macro
Create Web Service
Web Service files
Web Service Definition Language (WSDL) file

Create Web Service client for test

From WSDL file
© 2008 IBM Corporation
IBM Power Systems
IBM SOA Foundation
(Advanced)
© 2008 IBM Corporation
IBM Power Systems
Business Process Management Enabled with SOA
IBM SOA Foundation: http://www.ibm.com/soa
WebSphere Integration
Developer
WebSphere Process
Server
http://www.ibm.com/software/integration/wid/
Easy-to-use integration to simplify and
speed the assembly of composite
applications
http://www.ibm.com/software/integration/wps/
Flexible deployment of
business processes, making
plug-and-play of components a
reality
WebSphere ESB
Connectivity infrastructure for
integrating applications and
services to power your SOA
WebSphere Business
Modeler
http://www.ibm.com/software/integration/wsesb/
http://www.ibm.com/software/integration/wbimodeler/
Simple to use process modeling for
the business analyst to help maximize
process and business resource re-use
WebSphere Business
Monitor
http://www.ibm.com/software/integration/wbimonitor/
Real-time visibility into process performance
enabling process intervention and continuous
improvement
© 2008 IBM Corporation
IBM Power Systems
WebSphere Enterprise Service Bus (WESB)
(Advanced)
© 2008 IBM Corporation
IBM Power Systems
The Enterprise Service Bus shrinks those
interfaces further
Turn this (web services)…
Service
Service Service
…into this (SOA)
Service
Service Service
Enterprise Service Bus
Service Service Service Service
= Interface
 Decouples the
point-to-point
connections
from the
interfaces
= Service
 Allows for
dynamic
selection,
substitution,
and matching
Service Service Service Service
= Interface
= Service
 Enables more
 Enables you to
flexible coupling
find both the
and decoupling
applications and
of the
the interfaces for
applications
re-use
RESULT  Greater Business Responsiveness
© 2008 IBM Corporation
IBM Power Systems
What are the IBM ESB offerings
A Basic ESB:
1
2
WebSphere ESB V6, a new product delivering an
Enterprise Service Bus, built on top of and
leveraging WebSphere Application Server.
Facilitates SOA for Web services. Uniquely able to
connect to WebSphere MQ networks.
Now Available
on i5/OS
A Network Appliance ESB:
The Datapower XA35 is a hardware implementation
of an Enterprise Service Bus. It accelerates
infrastructure implementation, offloading XML traffic
to speed up processing with minimum network
disruption.
Datapower
XA35
An Advanced ESB:
3
WebSphere Message Broker V6, a new version of our
proven product, built on top of and leveraging
WebSphere MQ. Delivers an advanced Enterprise
Service Bus facilitating SOA for existing (non-Web
Services) applications.
Runs in a
System i
LPAR
© 2008 IBM Corporation
IBM Power Systems
Enterprise Service Bus capabilities
Flexible connectivity
infrastructure for integrating
applications, data, and
services to power your SOA
Color = Data type
Shape = Protocol
© 2008 IBM Corporation
IBM Power Systems
ESB Capabilities: Transformation
Shipping System
TRANSFORMS
message formats
between requestor and
service
Shipping Master
Customer Master
Lname (Char 15)
Fname (Char 15)
Zipcde (Char 5)
Addr1 (Char 30)
City (Char 20)
State (Char 2)
etc
Lastname( Char 20)
Firstname (Char 20)
Address1 (Char 25)
City (Char 20)
State (Char 20)
Zipcode (char 5)
etc
Customer Master
© 2008 IBM Corporation
IBM Power Systems
ESB Capabilities: Conversion
Customer Master
CONVERTS transport
protocols between
requestor and service
JDBC
UPDATE
CUSTMAST
RECORD=1
Name=“John
Smith”, Address
= “100 Main St.”,
etc…
XML
<name>John
Smith</name>
<address>100
Main
St.</address>
Etc…
Customer Address
Change
© 2008 IBM Corporation
IBM Power Systems
WebSphere Process Server (WPS)
(Advanced)
© 2008 IBM Corporation
IBM Power Systems
WebSphere Process Server
The Engine Room of Business Process Management
• Robust execution of business processes
– Reliable, scalable, secure, open standards
– Single integrated runtime for all SOA based process automation
• Supports all aspects of process integration
–
–
–
–
–
Process flows
Business rules
Human steps
Services
State machines
• Rapid process change ensuring business agility
– Reuse existing services that you already have and create new services for future use.
– Build process flows without knowing where the information is coming from (late binding of
services)
– Business rules control the execution sequence of the process and can change
dynamically
© 2008 IBM Corporation
IBM Power Systems
WebSphere Integration Developer (WID)
(Advanced)
© 2008 IBM Corporation
IBM Power Systems
WebSphere Integration Developer
Accelerated Solution Assembly
• The complete toolbox for building
composite applications
– An Assembly Editor for wiring
solutions together
– All the tools you need for building
solution components (Editors for
BPEL, Business Rules….)
– One, easy to learn user interface
based on Eclipse
• Architected for reuse and
flexibility
– Simplified component interfaces
– Plug-and-play solution components
One Tool, One set of skills, Many uses
Integrating services across the enterprise: Processes, Mediations,
Adapters, Components
© 2008 IBM Corporation
IBM Power Systems
WebSphere Business Monitor &
WebSphere Business Modeler
(Advanced)
© 2008 IBM Corporation
IBM Power Systems
WebSphere Business Monitor
Achieve Real-time Visibility into Processes
Scorecards
Key Performance Indicators
for business units
Collaboration
Work with teams to
resolve situations
Business Alerts
Notification of situations
that require response
Reports & Analyses
Understanding trends by combining
real-time performance and historical
information
External Information
Information affecting
performance
© 2008 IBM Corporation
IBM Power Systems
WebSphere Business Modeler
Business Level Modeling And Simulation
• Designed for business users
• Import models directly from Visio
• Hundreds of process templates
available
• Optimize all aspects of your business
– set KPI’s and metrics
• Collaborate with subject matter
experts through the Publishing Server
Model, simulate, and analyze
• Enhanced analysis and simulation
capabilities. Fully understand
impacts before deploying.
Clean hand-off to I/T
• Rapid and accurate deployment of
your solutions
• Business modeling is the starting
point for IT deployment (WID)
© 2008 IBM Corporation
IBM Power Systems
Summary!!
• Introduction to SOA & Web Services
• Creating RPG Web Service Business Logic.
– Lab Time
• Deploying/Testing RPG Web Services.
– Lab Time
• Presentation Layer of Web Services.
– Lab Time
• Consumption of Web Services.
– Lab Time
© 2008 IBM Corporation
IBM Power Systems
Questions?
© 2008 IBM Corporation
IBM Power Systems
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© 2008 IBM Corporation
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