As044285288

Mr. M R. Solanki et al Int. Journal of Engineering Research and Applications www.ijera.com
ISSN : 2248-9622, Vol. 4, Issue 4( Version 1), April 2014, pp.285-288
www.ijera.com 285|P a g e
A Web Service Based Design to Integrate a Web Portal and an
ERP System
Mr. Manishkumar R. Solanki, Ms. Seema Shah
M.E.-INFT Student,Vidyalankar Institute of Technology, Wadala,Mumbai University.
Assistant Professor, INFT Department,Vidyalankar Institute of Technology,Wadala, Mumbai University.
Abstract
Today the ability to seamlessly exchange information between internal business processes, customers, and
partners is vital for success. The organizations employ a variety of disparate applications that store and
exchange data in dissimilar ways and therefore cannot "talk" to one another productively. Web services have
evolved as a practical, cost-effective, deployment environment to realize dynamic and interoperable data
integration between critical applications over operating system, platform, and language barriers that were
previously impossible. This paper describes a service-oriented approach for the integration of a Web Portal and
ERP application. We present a system architecture based on Web Service oriented framework in which both the
applications are loosely connected through software components.
Keywords—ERP,SOA, SOAP, VERP, VIOLA, UDDI, Web Portal,WSDL
I. Introduction
Enterprises aretypically comprised of
hundreds applications that are custom-built, acquired
from a third-party, part of a legacy system, or a
combination of these types, operating in multiple
tiers and running on different operating systems and
platforms. [1] Data can be found throughout the
enterprise, in multiple disparate systems and in many
different formats. Data is scattered everywhere—on
the mainframe, in databases, in obscure legacy
systems, in spreadsheets on desktops, in enterprise
resource planning (ERP) applications, on message
queues, in flat files. [2]
Data integration allows organizations to
access all their fragmented data, create an accurate
and consistent view of their core information assets,
and easily leverage these assets across the enterprise
to drive business decisions and operations.
Organizations are using data integration in many
different ways to drive business value. They are using
data integration to migrate data into new applications,
or implement master data management. They are also
using data integration to synchronize data across
operational processes and systems, and to create
flexible, reusable data services.
The goal of this paper is to propose a system
design for the data integration through Web Services
approach. The remainder of the paper is organized as
follows: Section II discusses various issues of data
integration. Section III presents the concept of Web
Service, Section IV suggests the design architecture,
and Section V gives brief idea of implementation and
at the last Section VI concludes the paper.
II. Issues related to data Integration
Since a typical IT organization usually has a
collection of isolated, incompatible, disconnected
applications and databases [3], it is a prime need for
data integration to give a user the unified access of
the overall system. At the other end, companies
deploy their applications on different database
products i.e. Oracle, SQL Server, Sybase, MySQL,
etc. rather than one. it means that different data
interfaces should be considered for data integration.
But even if databases federated nicely, which they
don‟t, there is still a mass of data locked in flat files
of various sorts, or content management systems or
document management systems. As the new software
applications are being developed in very much rapid
manner, the biggest challenge is to integrate the data
between the legacy systems and these new
applications.
In the past, companies had to bet the
business on CORBA, JAVA RMI, distributed small
talk, or DCOM to create a SOA. They yielded
systems where the coupling between various
components in a system is too tight to be effective for
low-overhead, ubiquitous B2B e-business over the
Internet. For example, DCOM clients access remote
COM types using tightly coupled RPC calls. CORBA
requires the use of tightly coupled protocol referred
to as Internet Inter-ORB Protocol (IIOP), to activate
remote types. Enterprise JavaBeans (EJBs) requires a
Remote Method Invocation (RMI) Protocol and by
and large a specific language (Java). [4] Thus each of
these remote invocation architectures needs
proprietary protocols, which typically require a tight
connection to the remote source. These approaches
RESEARCH ARTICLE OPEN ACCESS

require too much agreement and shared context
among business systems from different organizations
to be reliable for open, low-overhead B2B e-business.
[5]The risks and costs of standardizing on one
outweighed the potential benefits of SOA. This
accounted for the low adoption rate.
Existing mission critical applications can be
wrapped in Web services interfaces and then
accessed from other applications or Web browsers.
This enables businesses to create business services
out of existing systems, and rapidly implement and
integrate new functionality. Using Web services,
companies can begin leveraging existing investments
and incrementally adding new functionality. [6]
III. The Concept of Web Services
The Service Oriented Architecture (SOA)
has facilitated to develop discrete business functions
or processes as independent components with
standard interfaces which can be accessed by other
applications, services, or business processes,
regardless of the platform or programming languages.
Web services are offering a technology that is rich
and flexible enough to make SOAs a reality. [7]
“A Web Service is a self-contained, modular, and
dynamic application which is described, published,
searched and invoked over the network to create
procedures, business processes and supply chains,
can be local, distributed or web based and uses open
standards i.e. HTTP and XML and open protocols i.e.
HTTP, SMTP, BEEP, TCP/IP, etc. to support
heterogeneity across the platform and language
boundaries.”
A. Architecture:
A typical Web Services architecture consists
of three elements as shown in Fig.1:
 A Service Provider develops services which he
wants to provide to the outside world and
publishes this services to the UDDI registry
 A Service Requester or The Client looks up the
services at the UDDI registry and binds with the
Service Provider for the services which he wants
to access.
 A UDDI registry is a central repository which
maintains the registry of published services.
Fig. 1 A Web Service Architecture
B. Technologies:
Web Services are based upon three main
technologies WSDL (Web Service Description
Language), UDDI (Universal Description and
Discovery Integration) and SOAP(Simple Object
Access Protocol).
WSDL:
The Web Services Description Language
(WSDL) is written with an XML grammar for
describing Web services as a set of network
endpoints that operate on messages. A WSDL service
description contains an abstract definition for a set of
operations and messages, a concrete protocol binding
for these operations and messages, and a network
endpoint specification for the binding. [8] Three
major elements of WSDL that can be defined
separately and they are:
 Types ( data types of parameters to be passed to
and to be retrieved from the Web Service)
 Operations (an abstract description of an action
supported by the service)
 Binding (a concrete protocol and data format
specification for a particular port type.)
The service requester should know the
above elements to invoke a particular Web Service
while writing the Web Service client code.
WSDL service definitions provide
documentation for distributed systems and serve as a
recipe for automating the exchanging of messages
between applications. [8]
UDDI:
It specifies registry of Web services. It
defines an electronic business registry where
businesses can describe their business and register
their Web services as well as discover and integrate
with other businesses that offer Web services.
[9]Service providers can dynamically publish
information and services, and service requesters can
search through the registry to find personal
information about a service provider as well as

technical information about its services. UDDI
maintains four basic information about the Web
Service i.e. businessEntity (information about the
party who publishes web service), businessService
(description of technical services), bindingTemplate
(provides the details of how and where the service is
accessed) and tModels (abstract service protocols that
describe a particular Web Service‟s behavior.) [10]
SOAP:
SOAP provides a simple and lightweight
protocol for exchanging XML data over the Web.
SOAP enables client applications to easily connect to
remote services and invoke remote methods. SOAP
messages are written entirely in XML and are
therefore uniquely platform- and language-
independent compared to the protocols used by
CORBA, DCOM, and Java RMI, frameworks.
SOAP consists of three parts:
 The SOAP envelope (defines an overall
framework for expressing what is in a
message; who should deal with it, and whether it
is optional or mandatory)
 The SOAP encoding rules (defines a serialization
mechanism that can be used to exchange
instances of application-defined data types)
 The SOAP RPC representation (defines a
convention that can be used to represent remote
procedure calls and responses)
The next section discusses the proposed
system design to implement the data integration of a
Web Portal and an ERP system.
IV. System Design
Vidyalankar Institute of Technology(VIT), Wadala
(E),Mumbai has implemented an Academic Social
Networking Portal, which provides with the right
mixture of academic services, entertainment and
socialization. These features were instrumental for
the foundation of VIOLA which stands for
„Vidyalankar Online Applications‟. It provides an
interactive and user-friendly medium for all its users
from anywhere round the world.
VIT is also running an ERP System named
VERP which integrates and automates the data of
Accounts, Admission, Exam, Library, Human
Resources, Administration, Management, Payroll and
other departments on a single computer system
provide a unified central access of information of
entire institute.
Presently, both these systems are running
independently. But some data is commonly needed in
both the systems. As a result when common data
changes we have to update it in both the systems
manually which is a cumbersome process.
Eventually, some of the data across systems became
inconsistent. When institute noticed the resulting
double data entry, inconsistent data, and data
isolation problems, the management decided to find
ways to integrate the systems.
Requirements:
 The profile information of the user in VIOLA
should be integrated to VERP
 Subject details from VERP should be imported
to VIOLA for transcript generation and to fill
faculty feedback forms
 The student details from VERP should be
integrated to VIOLA to generate the Bonafide
Certificate and to send it to the student through
an email.
 The Company and the student details from
VERP should be integrated to VIOLA so that the
Training and Placement Officer can conduct the
campus interview online.
SOAP based Web Service provides solution
for this problem by creating web services i.e. VIOLA
WS and VERP WS so that each system can invoke its
relevant web service to integrate its data with other
system to keep both the systems consistent.
The data integration between VIOLA and
VERP systems will be taking place by developing
Web Services. How these two systems will
communicate is depicted in the architectural diagram
shown in Fig. 2. Explanation of this diagram is given
below:
Steps of Communication:
1. The first task is to develop relevant web services
i.e. VIOLA WS (Web Services) and VERP WS
(Web Services) which will be deployed at
VIOLA and VERP systems respectively.
2. We have to create the WSDL (Web Service
Description Language) files and these files have
to be published (registered) with UDDI
(Universal Description and Discovery
Interaction) residing on the central server which
is Linux Cent OS Server. [As shown with label
no. 1(Publish) in the diagram]
3. The client (VIOLA or VERP) will find the
WSDL files on the central server and has to
understand the request and response parameters
to invoke a particular web service. [As shown
with label no.2 (Find)in the diagram]
4. The client has to call the desired web service
which is called as a bind process.
[As shown with label no.3 (Bind) in the diagram]

Fig. 2 VIOLA-VERP Integration Architecture
Diagram
V. Plan of Implementation
VIOLA and VERP are developed in PHP
while Web Services will be developed in Java. So a
PHP based application will invoke the Java based
web services. The WSDL files will be generated with
the help of Apache Axis2 Toolkit. These files will be
deployed at the Linux CentOs Server. The Business
Logic of web services will be written in Java and
after compilation, .aar file will be generated to
deploy it inside the services directory of Axis2
Toolkit. Axis2 Toolkit will be running inside the
Tomcat application server which is providing a run
time environment for Java based web applications.
Finally, both VIOLA and VERP will generate the
relevant stub classes in PHP to invoke the web
services to pass parameters and to retrieve the return
values (if necessary).
VI. Conclusion
The Web Services enable a distributed
environment in which any number of applications, or
application components, can interoperate seamlessly
among and between organizations in a platform-
neutral, language-neutral fashion. The data
integration between the present running systems and
legacy systems can be achieved by the web services
in cost effective manner. To examine the said
advantages of Web Services we have proposed the
design to integrate a web portal (VIOLA) and an ERP
system (VERP).
References
[1] http://www.eaipatterns.com/Chapter1.html
[2] Enterprise Data Integration, Maximizing the
Business Value of Your Enterprise Data -
http://www.integralsolutions.pl/is/images/art
ykuly/enterprise_data_integration.pdf
[3] http://www.dadbm.com/2011/11/enterprise-
data-integration-issues-due-to-software-
complexity/
[4]
http://www.roseindia.net/webservices/web
services.shtml
[5]
http://www.ibm.com/developerworks/web
services/library/w-ovr/
[6] Enterprise Integration: The Essential Guide
to Integration Solutions,By Beth Gold-
Bernstein, William Ruh,Published Jul 16,
2004 by Addison-Wesley Professional.
Copyright 2005, Edition:1st,Book,ISBN-10:
0-321-22390-X,ISBN-13: 978-0-321-22390-
6
[7] Kevin J. Ma,Web Services: What‟s Real and
What‟s Not?, IEEE Computer
Society,March-April 2005,pp 14-21
[8] http://www.w3.org/TR/wsdl
[9] Jaideep Roy and AnupamaRamanujan,”
Understanding Web Services”, IEEE
computer Society,November-December
2001, pp 69-73
[10] https://www.oasis-
open.org/committees/uddi-spec/doc/tn/uddi-
spec-tc-tn-wsdl-v2.htm

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