SOA – Service Oriented Architecture Overview

To start things on SOA, First we need to understand the basic concepts like web service. Because SOA is mainly related with the web services and its orchestration.

Web services describes a standardized way of integrating Web-based applications using the XML, SOAP, WSDL and UDDI open standards over an Internet protocol.

 XML (Extensible Markup Language) is used to tag the data

SOAP (Simple Object Access Protocol) is used to transfer the data

WSDL (Web Service Description Language) is used for describing the services available and

 UDDI (Universal Description, Discovery and Integration) is used for listing what services are available.

In the developers point of view BPEL (Business Process Execution Language) is used for the development and integration of web services.

BPEL is nothing but a XML based language used to describe a web service.XML tags used in the BPEL was standardized by the OASIS (Organization for the Advancement of Structured Information Standards).

Oracle SOA-BPEL Project development Overview -

 Normally we used to create the business logic (Language specific packages like PL/SQL package or Java Package) and the workflow by using the Oracle workflow. BPEL combines both the versions so that we can develop the workflow activities and some extent of the language code, which describes the business logic.

Steps:

a. Create the business process web service by using the IDE like Jdeveloper or Eclipse. Create a project,   then for the business logic in the project IDE automatically creates WSDL, XSD and XML files. All the project files are bundled into .Jar file for the deployment into the server.

b. Deploy BPEL project (.Jar) file on BPEL Process Manager by using Ant Utility or by using the IDE (Jdeveloper) itself.

c. To test the BPEL process, login into weblogic server em console , where we can test our deployed web service.