Generation of WEB SERVICES Using PROGRAM SLICING RAVINDRA KUMAR SUDIP AKURA AMIT KUMAR BALKARAN SINGH SIDHU

OBJECTIVE  This project “Generating Web Services through Program Slicing” consists of developing web services (WS), which are convenient and platform independent.  This project proposes a way for generation and composition of web services through Program Slicing.

PROJECT MOTIVATION  Generating Web Services is a complex task. Identifying, generating and composing services are still open issues.  Some researchers have studied on generating and composing web services by using program slicing technology, but most of them focus on preparing web services, and haven’t proposed a feasible method with the whole process of WS generation and composition

ABSTRACT  The project “Generation of web services using Program Slicing” provides a method to generate a WSDL (Web Service Description Language) file and a SOAP (Simple Object Access Protocol) message from source codes.  This also includes an approach to generate a proxy service for each web service which allows user to easily call a service.

What is a WEB SERVICE  A web service is a network accessible interface for application functionality, built using standard Internet technologies.  Clients of web services do NOT need to know how it is implemented. Application client Application client Application code Application code Network Web Service

Components of a WEB SERVICE  WSDL (Web Service Description Language) File  SOAP (Simple Object Access Protocol) Messages  UDDI (Universal Description, Discovery and Integration)

WSDL (Web Service Description Language)  Define a web service in WSDL by  Writing an XML document conforming to the WSDL specs  Describes three fundamental properties  What a service does  Operations (methods) provided by the service  How a service is accessed  Data format and protocol details  Where a service is located  Address (URL) details

SOAP (Simple Object Access Protocol)  SOAP originally stood for "Simple Object Access Protocol".  Web Services expose useful functionality to Web users through a standard Web protocol called SOAP.  SOAP is a simple markup language for describing messages between applications.  SOAP uses mainly HTTP as a transport protocol. That is, HTTP message contains a SOAP message as its payload section.

UDDI (Universal Description, Discovery and Integration)  UDDI stands for Universal Description, Discovery and Integration.  UDDI is a directory for storing information about web services.  UDDI is a directory of web service interfaces described by WSDL.

What is PROGRAM SLICING  Program slicing is a method for automatically decomposing programs by analysing their data flow and control flow.  In general a program slice consist of those statements that may directly or indirectly affect the variables computed at a given program point.  The program point P and the variable set V, denoted by is called a Slicing Criterion.

EXAMPLE  int i; int sum = 0; int product = 1; for(i = 0; i < N; ++i) { sum = sum + i; product = product *i; } write(sum); write(product); SOURCE CODE  int i; int sum = 0; for(i = 0; i < N; ++i) { sum = sum + i; } write(sum); SLICED CODE FOR «SUM»

HARDWARE Specifications  Hard Disk : 20 GB and above  RAM : 1 GB and above  Processor : Dual Core and above

SOFTWARE Requirements  Windows XP service pack 3 or later  Visual Studio 2010  Microsoft SQL Server 2008

REFERENCES  Yingzhou Zhang, Wei Fu, Geng Yang, Lei Chen and Weifeng Zhang, “Web Service Generation Through Program Slicing”, 2010, pp

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