IBM Systems Magazine, Mainframe - March/April 2009 - 42

Developer For example, I selected a portion of the DFHCOMMAREA for the inbound data structure and specified the generation options for the WSDL file and our XML converters. In this particular case, on the WSDL page, I specified the location specific to the CICS system where the Web service will be hosted. Once I finish selecting and click “Next,” I must specify the properties for the WSBIND file. In case you aren’t familiar with the WSBIND file, it’s specified in the WEBSERVICE definition used to detail how CICS executes an application. The WSBIND tells CICS which application program to execute, identifies if a COMMAREA or CHANNEL is used and specifies how CICS transforms the message between the XML format and COMMAREA format. When you click “Finish,” RDz generates the Web service and populates the project created with several elements, including the converter program (see Figure 3, below). You can then use the Web Services Explorer to test the service before deploying it. Reengineering allows you to reuse existing, well-tested application code in new endeavors. RDz also provides: s 3/! ACCESS TO #)#3 6 AND )-3 6 #/"/, APPLICATIONS s "OTTOM UPTOP DOWN OR MEET IN THE MIDDLE #/"/, TO XML mapping support s )NTEGRATED #/"/, 8-, CONVERTERS 8-, SCHEMAS AND WSDL generation s 3ER VICE &LOW -ODELER TO BUILDDEPLOY SER VICE F LOWS out of your existing Commarea, Channel, MQ and Terminal CICS applications Figure 3 Redeveloping Redevelop means to create new Web services from scratch. At first glance, this method might have you thinking it’s too cost prohibitive; hold that thought. To simplify implementation of Web and SOA solutions, I BM i nt roduced t he Enter pr i se Gener at ion La ng uage (EGL). It’s easy to learn and complements Java and COBOL technology with a simplified and more abstract development paradigm that allows developers of varied skill sets to quickly deliver cross-platform, transactional data-centric services and applications. EGL prov ides a way for I T organizations to embrace modern, Web and SOA technologies without forcing the entire team of developers to learn and master the low-level intricacies and complexities of Java and SOA programming. IBM Rational Business Developer (RBD) provides a comprehensive and powerful development workbench for the EGL language and it’s the tool we’re going to use to create new services. EGL is designed to provide native suppor t for services. Unlike other languages, EGL has a service keyword built into the language, allowing developers to focus on what must be done, not how to do it. One of RBD’s strengths is its flexibility in generating code for many platforms. Services and applications developed in EGL are generated into COBOL or Java language. The generated COBOL program are deployed natively to System z platforms, for example to CICS or IMS transaction managers, or to System z batch pa r t it ion s . T he ge ne r ated Java appl icat ion is deployed to any env ironment where you can Figure 5 Figure 4 42 M A R C H/A PRIL 2009 ibmsystemsmag.com/mainframe

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IBM Systems Magazine, Mainframe - March/April 2009

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