Patterns: Extended Enterprise SOA and Web Services

514 Patterns: Extended Enterprise SOA and Web Services

C.1 CICS Transaction Server V3.1 Web services support

CICS Transaction Server V3.1 introduces formal support for Web services. It

provides the following features:

򐂰 A CICS application can participate in a heterogeneous Web services

environment as a service requester, as a service provider, or both.

򐂰 It provides support for HTTP and MQ.

򐂰 It includes the CICS Web services assistant, a set of utility programs that help

you map WSDL service descriptions into high-level programming language

data structures, and vice versa. The utility programs support the following

programming languages:

–COBOL

– PL/I

–C

–C++

򐂰 The CICS support for Web services conforms to open standards including:

– SOAP V1.1 and V1.2

– HTTP V1.1

–WSDL V1.1

򐂰 CICS support for Web services ensures maximum interoperability with other

Web services implementations by conforming with the Web Services

Interoperability Organization (WS-I) Basic Profile V1.0.

C.2 Creating Web services for CICS

There are two basic approaches for building Web services to run in a CICS

environment:

򐂰 Bottom-up

An existing piece of business logic is wrappered as a Web service. WSDL is

created to describe the Web service interface to this Web service.

򐂰 Top-down

An existing WSDL interface document is used to create a skeleton

application. This skeleton represents the operations and data structures

defined in the WSDL. The skeleton application is then populated with

business logic.

Both bottom-up and top-down Web service implementations can be developed

using the CICS Web services assistant.