Patterns: Extended Enterprise SOA and Web Services

138 Patterns: Extended Enterprise SOA and Web Services

8.1 WS-I sample business scenario

The Web Services Interoperability Organization (WS-I) has developed a supply

chain management business scenario that demonstrates the features, and tests

for compliance of the WS-I Basic Profile V1.0. The following documents describe

the WS-I sample business scenario and the technical solution overview:

򐂰 WS-I Supply Chain Management Use Cases V1.0

򐂰 WS-I Usage Scenarios V1.0

򐂰 WS-I Supply Chain Management Technical Architecture V1.0

For full details, see the Web Services Interoperability Organization Web site:

http://www.ws-i.org

This WS-I sample business scenario is a simplified supply chain for a consumer

electronics retailer. The scenario consists of several Web service interfaces

(WSDL files) and a Web-based GUI. Each Web services engine provider wishing

to demonstrate the WS-I sample business scenario must provide an

implementation for the Web services interfaces.

IBM provides an implementation of the WS-I sample business scenario using

Web services implementations written in J2EE and which run in WebSphere

Application Server. Other Web service engine providers have created other

implementations, using other programming languages and application servers.

In this redbook we use a modified version of the IBM implementation of the WS-I

sample business scenario, the ITSO Good sample business scenario, to

demonstrate extended enterprise capabilities using SOA and Web services.

8.2 ITSO Good sample business scenario

In this redbook we use a fictional company called ITSO Good to demonstrate

design, development, and runtime considerations for extended enterprise

solutions. The ITSO Good sample is a modified version of the IBM

implementation of the WS-I sample business scenario. This section describes:

򐂰 The high-level business context of the sample business scenario

򐂰 How the supply chain works

򐂰 Screenshots from a run through of the ITSO Good sample application

implementation.

Chapter 8. Business scenario used in this book 139

8.2.1 Business context

The ITSO Good enterprise provides a Web site which allows users to place

orders for electronic goods such as televisions, DVD players, and video cameras.

The ITSO Good supply chain management application handles the order of

these goods through a Retailer, the delivery of these goods through a

Warehouse, and the restocking of the Warehouse through a number of

Manufacturers. The Manufacturers are all external organizations to ITSO Good.

The users of the ITSO Good Web site are all internal ITSO Good employees.

The applications that make up the ITSO Good supply chain management

scenario are shown in Figure 8-1.

Figure 8-1 High level business context of ITSO Good

8.2.2 Applications in the supply chain management

The supply chain management scenario works as follows:

򐂰 The

SCMSampleUI application provides a Web front-end for users to access

the ITSO Good supply chain management process.

򐂰 The

Retailer application can be used to retrieve a list of products sold by the

Retailer, and to place orders.

ITSO Good

Intranet

SCM

Application

WarehouseRetailer

Logging

Facility

Manufacturer C

Manufacturer B

Manufacturer A

I

n

t

e

r

n

e

t

140 Patterns: Extended Enterprise SOA and Web Services

򐂰 The Warehouse application ships product orders if the Warehouse has

sufficient stock.

򐂰 The

Manufacturer applications, three of those, replenish the Warehouse of

products if the Warehouse stock levels fall below a certain threshold. Each

Manufacturer produces different products, and all are external to the ITSO

Good organization.

򐂰 The

Logging Facility application records the status of orders as they pass

through the supply chain management scenario. This can be used to track the

progress of a given order.

8.2.3 Example of using the ITSO Good sample application

This section shows an implementation of the ITSO Good sample application

running in WebSphere Application Server. It shows the Web-based GUI and how

the supply chain management process works.

The first screen the user sees is shown in Figure 8-2.

Figure 8-2 SCM Sample application

Chapter 8. Business scenario used in this book 141

To use the application. a user clicks Place New Order. This retrieves a list of all

the products that the Retailer application sells. This list of products is shown in

the Shopping Cart screen, as shown in Figure 8-3.

Figure 8-3 SCM Sample product listing

You can order multiple quantities of each product. If the Warehouse has sufficient

stock for the product, an order is placed.

If the placement of the order causes the Warehouse’s stock level of that product

to drop below a certain threshold, then a reorder request is sent to the external

Manufacturer of the product.

The Order Status screen, Figure 8-4 on page 142, shows which orders were

placed and which orders were not placed due to insufficient stock.