Managing Information Access to an Enterprise Information System Using J2EE and Services Oriented Architecture

Chapter 8. Integration using WebSphere Business Integration Adapters 237

Figure 8-26 StockInfo business process Web client

The process runs and the console should print out the contents of the Quote

Information and return the results to the calling Web service.

8.7 Creating the system process

The system process in this scenario is a multi-configuration process that

facilitates the flexibility of switching and choosing a service provider using the

context data information. This process was a key business requirement and

growth opportunity that was mentioned in 3.1.3, “Business requirements” on

page 69. For an overview of a system process, refer to 2.2.5, “Conceptual

architecture” on page 37 and 2.2.6, “Logical architecture” on page 47.

Figure 8-27 on page 238 shows the multi-configuration context-based routing to

different service providers implemented by the system process.

238 Managing Information Access to an EIS Using J2EE and Services Oriented Architecture

Figure 8-27 System process interaction - adapters service providers

The system process uses the context information to route the request, including

the domain object, to the adapter service partner link. For this particular scenario,

the partner link is the JDBC adapter service BPEL process, which does the data

transformation and the request on the WebSphere Business Integration Adapter

for JDBC.

The design and development of a system process using BPEL is explained in

Chapter 9, “Integration into business processes” on page 241.

Here are the high-level steps that are required to incorporate the adapter process

into the system process:

1. Map the InputVariable to the incoming domain object by setting the message

file name to the system process WSDL that contains the domain schema.

Then, set the message type on InputVariable.

2. In the Assign StockInfo snippet, set the data from the input variable into the

adapter request variable, QuoteIn.

3. Create and map an OutputVariable to the outgoing domain object by setting

the message file name to the system process WSDL that contains the domain

schema. Then, set the message type on OutputVariable.

4. Set the returned result from the adapter, QuoteOut, into the corresponding

values for the OutputVariable.

5. Integrate the adapter business process into the system process as the

appropriate remote service call partner link.

System Process

Partner

Link

(PL)

Context

Adapter Service

Process

Data Transformation

LOCAL

REMOTE

Domain Data

JDBC

Data Transformation

SAP

Adapter Service

Adapter

Adapter for

mySAP

Adapter for

JDBC

Partner

Link

(PL)

LOCAL

REMOTE