Oracle BPEL process tutorial for beginners

                                Working with BPEL Process

Objective: Implementing a GetFullName Service using BPEL Synchonous Process.

Content:

1.       Create SOA Sample Application

2.       Design GetFullNameService

3.       Create a GetFullNameBPEL (1.0) process

4.       Modify the default BPEL-XSD file

5.       BPEL Process Customization

6.       Implement Assign activity

7.       XPath Expression Editor

8.       Conant function

9.       Deploy and Test the customized SOA Project

Create SOA Sample Application

Click on the Application navigator for creating a new Application

Select the SOA Application from the Application Template

Create a new Project ‘GetFullName’

Select the Empty Composite

Drag the BPEL Component into the composite from the composite palatte which is on the right side.

Name it as GetFullNameBPEL.

Select the Template as Synchronous BPEL Process since it gives response immediately based on the request.

While you are creating a Synchronous/Asynchronous BPEL Process, it generates the default Input and Output payloads (parameters) which is shown at bellow.

Your Created Composite would look like this.

Select the default XSD from the XSD folder of the current project.

As you can see here, the default XSD elements would be like above and this is the Design mode.

We need to change the default XSD elements as per our customization and as we are about to do a Full Name service, this can be customized as follows.

Hence this is the customized XSD elements after it got edited.

Double click the BPEL Process which is shown at above

This is the BPEL and inside of it we can perform and operate many activities based on the business logic that needs to be implemented for different SOA services.

Now drag the Assign activity for assigning the input and output payloads which are available in our customized XSD file.

Double click the Assign activity for editing the Input and Output payloads.

As per the Service implementation, we should take XPath Express Editor which allows us to do different functionalities available in it.

This is the XPath Expression Builder and based on the requirement we are able to select the functions which are needed for our service implementation as shown in the bellow figure.

To implement FullName Service we can use Concat function and insert into Expression Builder.

Inside of Concat function, we have to insert the input payloads that are needed to be concated.

Insert the FirstName from the input payload into concat function

Then after we have to give space inside a single quotation (‘  ‘) this allows a space between First Nam and Last Name when the requested user enters his name. Insert the LastName payload from the input variables and click ok to finish the Expression Builder.

This is how the Xpath Expression Builder provides a Business Logic Functionalities to implement our SOA services.

Save all which is shown in the above figure.

Now our SOA Developed service is ready for deployment. Deploy the service by right clicking on the current project and proceed for the deployment.

 Hence we are deploying on Weblogic Enterprise Manager, we can select the Deployment Action to Deploy on Application Server.

Here we can name the New Revision ID as per our wish. Usually we modify this ID when ever we redeploying our specific SOA Service.

Click Next

Note: Initially we have to configure our Application Server that can take as deployment of our SOA Services. For configuring a new Application Server, we need to create a new one by clicking on + tab which is shown in the above figure.

Select the already created Local_SOA Application server to deploy our GetFullNameService Project.

Click Next.

SOA_SERVER1 is the default target SOA Server. Click Next.

Now Finish it.

We can notice our Build status in SOA-Log tab.

Once our Build got successful we can notice our Deployment status in the Deployment-Log.

To Test our GetFullName Service which is deployed at our Application Server, we have to log into the Weblogic Enterprise Manager.

Select the specific project that we need to Test and click on Test button.

Enter the First Name and last Name as inputs which is shown at the bellow figure.

Now Test your Service to get your FullName as Output.

Here is the Output Result that clearly visible in the above pic. Now we can reuse this Service WSDL by considering/referring the WSDL URL which has shown in the above.

Conclusion:

Therefore this is a Sample SOA Service Application Project which using BPEL

References:

Introduction to BPEL Process Manager:

http://docs.oracle.com/cd/B14099_19/integrate.1012/b14448/introbpel.htm

Getting Started with BPEL Process Manager:

http://docs.oracle.com/cd/E23943_01/dev.1111/e10224/bp_gsbpel.htm

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Best,

Jagadish Challa
A Certified Oracle Fusion Middleware Specialist

!!!Fight for Excellence but not for Success!!!

Skype: jagadeesh.ravi