Operational Branch in OSB

Operational Branch:- It is used to route the incoming requests to different business service based on the operation name.

If no any conditions satisfied then by default branch is executed.

Scenario:- Create a OSB service which will accept two numbers, and it will perform addition and subtraction according to the operation.

Solution:- 

Create a project name it as ConditionalBR (as per your choice you can give it) 

create a schema as per the requirement and name it as per your choice   

Right-click on project name--->New--->Xsd Schema (give the schema name as per your choice)



<xsd:element name="Request">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element name="Num1" type="xsd:integer"/>
        <xsd:element name="Num2" type="xsd:integer"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>
  <xsd:element name="Response">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element name="Result" type="xsd:integer"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

Click on save button to save the schema changes.

Double click on operationalBR which shows the structure of the project

Right-click on the Proxy service layer---->Insert Protocal---->HTTP


then provide proxy service name Click on Next, choose service type as Wsdl then from xsd I need to make wsdl, click on create wsdl 


select interface type as Synchronous Interface, select input payload as xsd incoming request, if yours project xsd  is not shown in that folder the import the xsd by import option.

select output as response and click on ok


after selecting input and output payload window will appear like 

then click on ok --->Next --->Finish

Go to wsdl and add two operations Add and Sub as mentioned below figure


Now in proxy service some error appears, you need to correct it.
Go to proxy service and select operational selection tab



select soap header action and click on the save button, then an error is gone for proxy service.


Double click on pipeline 

Here we need set out logic

Drag-drop operational branch, add one more branch and change the operation name to subtraction


Drag-drop pipeline pair for each branchs


Drag-drop replace activity in each response pipeline


Now go to 1st replace activity, double click on it and set the parameter as 

Location:- Body
Expression :-  .
Value:-     $body/exam:Request/exam:Num1 + $body/exam:Request/exam:Num2

Replace option:- Replace node contents

Click on save button

Click on 2nd branch replace activity, set the parameter as 

Location:- Body
Expression:- .
Value:-      $body/exam:Request/exam:Num1 - $body/exam:Request/exam:Num2

Replace option:- Replace node contents


Click on save button

Now please deploy the composite and test.

Addition of two nos result:-


Subtraction of two nos result:-


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