6. Business Rules Engine

Why Business Rules Framework?

Meet the time requirements demanded by an agile business .

Create Business Policies that one can develop, deploy and dynamically execute quickly without bringing one’s BizTalk process down.

Facts ExplorerThe facts explorer has four tabs

VocabulariesXML Schemas Databases .NET Assemblies

Business Policy Business Policy is a container in which

business rules are defined, versioned, tested, deployed and executed.

The policy may contain one or more rules for deployment

There are three states of a business policy,EditablePublishedDeployed

Sample Application We need to create and test a simple business rule that a business process can

use. The business process needs to validate a document and receive the result.

We have an xml instance of the schema ‘NewHireList’. Here according to the Age populated in the input instance the Applicant’s Role is decided as a ‘ValidApplicant’ or an ‘InvalidApplicant’

The policy deciding the above mentioned condition is as

If Age < Minimum Age then

Role changes to INVALIDAPPLICANT

where the minimum age will be set as 18 years inside the Business Rules Composer

XML instance of the schema<ns0:NewHireList

xmlns:ns0="http://RuleenginePro.NewHireList">

<DateTime>DateTime_0</DateTime> <Person> <Id>Id_0</Id> <Name>Name_0</Name> <Role>Role_0</Role> <Age>10</Age> </Person></ns0:NewHireList>

Preparation of schema

On schema validation

Creating the output instance

Generate instance of schema

Open Business Rule Composer

Add a new Vocabulary

Add a new definition in Vocabulary

Setting a constant value for MinimumAge

Definition for MinimumAge is created

Creating definition for ApplicantAge

Browse for the required schema i.e. NewHireList

Binding ApplicantAge defintion with Age element of schema

Select the required operation

Creating Definition for ApplicantRole

View of Vocabulary_RoleValidation

Publish vocabulary for creating Rule

Add a new Policy: SampleRule

Add a new Rule: Rule_Role

Defining the Rule condition. Select appropriate predicate

Place ApplicantAge on argument1 and MinimumAge on argument2

Define the Action as shown

Test Policy

Add the instance for the schema

Set a value for Age element

Click on Test Button

Role changes to INVALID APPLICANT