ibm proof of technology discovering the value of soa with websphere process integration © 2005 ibm...

IBM Proof of Technology

Discovering the Value of SOA with WebSphere Process Integration

© 2005 IBM Corporation

SOA on your terms and our expertise

WebSphere Integration Developer v6.0Introduction to Business Rules

2 SOA on your terms and our expertise


Concepts and Overview Where do Business Rules fit in the Architecture

Business Rule Components Organized in Rule Groups, Rule Sets, Decision Tables

Business Rule Tooling Developer roles and Business Analyst roles

Summary

Agenda – Business Rules



SOA Core Service ComponentArchitecture

BusinessObjects

Common EventInfrastructure

HumanTasks

HumanTasks

BusinessState

Machines

BusinessState

Machines

BusinessRules

BusinessRules

BusinessProcessesBusiness

ProcessesServiceComponents

WebSphere Application Server (J2EE Runtime)

SupportingServices

InterfaceMaps

BusinessObject Maps

RelationshipsSelectors

Fitting into WebSphere Process Server V6



Allows the separation of the business rule logic from the other services, applications, and processes in the system Exposes Business Rules as its own service in the WebSphere Process Server as a peer to the

other elements of the architecture

Allows the specification of the business rule logic in a simple form, easily understood by Business Analysts. Logic is specified as either

A sequence of if-test-then-actions clauses

A simple decision tree

Ability to free up IT resources for simple rule changes and without expensive IT personnel

Details of Business Rules change frequently While the structure of the rules will be specified using the WID tooling, elements can be added or

customized using a simple Web tool

Changes can be made dynamically to the system

Business Rules – Concepts



Discount service Offer a discount that varies depending on

Size of Order Credit Rating of Customer Time of Year

Postage Calculation Depending on weight and value we can compute postage cost When postage rates change we need to reflect this in our rules Would like to add new rules in advance, but have them come into force on a particular date

Online Book Seller Offer a recommendation depending on your browsing and past order history together with

ordering patterns of “similar” customers NOT IN SCOPE – need a Commercial rules or inference engine. (so long as it has a WS interface

this can be easily wired into the SCAXX

Business Rules - Examples



Interface (WSDL)

input1

output1

Business Rule Group Business Rules

Default Business Rule: RlName01 RlName01

RlName02

RuleSet

DecisionTable

1/1/05 6/24/05 RlName01

6/24/05 1/1/06 RlName02

etcetera

Parameter Method: Current time, Java, or XPath

Start Date End Date Business Rule

Business Rules – Business Rule Group



Business Rule Group is the highest level implementation component Groups Rule Sets or Decision Tables that share a common business focus Exposed in the runtime as an SCA service Provides the interfaces for Rule Sets and Decision Tables to use Lists the Partner references available for Rule set actions

Defines a table of dates and times for which implementation is to be used when for which interface Which Business Rule to use is determined by the date/time that is provided during

invocationThe date/time can be either the current date/time, “mined” from the input parameters via Xpath, or determined using a Java snippet

Business Rules – Business Rule Group - Summary



Business Rule Group

Rule Set

Each test is evaluated in turn and as many actions as are appropriate are executed.Thus order of the rules is critical.

Test1

Test4

Test2

Actions

Test3

Business Rules – Rule Set



Business Rule Group

RuleSet

Business Rules – Rule Set



Rule Set is a set of 1 or more if-then condition/action statements that are processed sequentially Evaluated from first listed to last, so order is important Able to choose any number of Action/If-Then conditions An Action need not have an If condition associated. Simple actions are allowed, these

are always executed. Example: Initializing variables

Evaluates multiple conditions and can fire multiple rules All the actions that have conditions that evaluate to true are needs to be done

Local variables can be defined for more “complicated” processing These can be of any datatype

Actions generally set values for output BOs But can invoke other SCA modules

Business Rules – Rule Set - Summary



Business Rule Group

Decision Table

Decision Table is a balanced tree. Exactly one branch is taken after each decision

Thus exactly one of the action sets is executed.

Test1

Test3

Test2Actions

Business Rules – Decision Table



Business Rule Group

Decision Table

Business Rules – Decision Table



Decision Table represents a decision tree structure

Each level of the tree is like a case (or select) statement Exactly one branch is taken at each level (the first listed that evaluates true so

order is important here too) If no case statement is satisfied at any level an exception occurs

The number of “total cases” is the product of the number of cases at each level So Level1 choice of 3, level2 choice of 2, level3 choice of 4 would give 3*2*4=24

cases in total

Only one set of actions will be fired The actions often consist of setting values for elements in the output, however

more complex actions involving other SCA components are possible

Business Rules – Decision Table - Summary



Tools UsedTools Used Role TasksRole Tasks

Developer RoleDeveloper Role

Business Analyst RoleBusiness Analyst Role

More Technical SkillsMore Technical SkillsMore Technical SkillsMore Technical Skills

WebSphereIntegrationDeveloper

WebSphereIntegrationDeveloper

Business RuleManagerWeb Tool

Business RuleManagerWeb Tool

•The day to day administrator•Implements minor business rule changes•More in tune with business practices•No WID licence.

•The day to day administrator•Implements minor business rule changes•More in tune with business practices•No WID licence.

•The developer that codes the business rules that are editable via the Business Rule Editor web tool•Implements what the Architect lays out•Wires the rules into Business Process

•The developer that codes the business rules that are editable via the Business Rule Editor web tool•Implements what the Architect lays out•Wires the rules into Business Process

More Business SkillsMore Business Skills

Business Rules – Roles - Tooling



The tool that supports all the SCA component development

Easy to use tools for defining, testing and managing business rules

Eclipse based tooling for Business Rule development

Focused on the more technical developer role

Allows templates to be created which can be used in the Web based Business Rules Manager

Used to create new Business Rules

Business Rules – Tooling - WID



Tooling – Templates - WID

As well as using WID to create the rules and rule groups we have discussed, WID can be used to create parameterized rule templates. From these templates new rule instances can be created in WID or the Web bases Business Rule

TEMPLATETEMPLATE

RULE from TEMPLATERULE from TEMPLATE



Built specifically for the Business Analyst

Manageable subset of full authoring functionality found in WebSphere Integration Developer

Templates built by the developer role allow the business rule analyst a very easy way to edit business rules at runtime Browser is all that is required to use

url={host:port}/br/webclient/pages/index.jsp

It is part of the WBI runtime as an optional install (installBRManager.jacl), might expect to be on a staging server

No need to restart application or application server when changing Business Rules

Users are authenticated using standard WAS authentication/security

Business Rules – Web Based Tooling



Business Rules – Web Based Tooling



WebSphere Process Server v6 exposes Business Rules as SCA components

Handles 80% of typical integration rules

Does not handle the other 20% of complex rules, like inferencing

Third party products with Web Service interface can easily integrate in SCA

WID Tooling allows creation, testing and deployment of rules

Web Based Business Rules manager allows Business Analyst to Edit, update and deploy business rules using only browser It is included with WebSphere Process Server v6.0 as an optional install

Tested rules can be deployed as EAR files in the standard J2EE deployment model

Business Rules – Summary



Thank YouMerci

Grazie

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Obrigado

Danke

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ibm proof of technology discovering the value of soa with websphere process integration © 2005 ibm...

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