1. © Copyright IONA Technologies 2002 PART 2: Web Service Composition: Unlocking Your Interface Potential Seumas Soltysik Senior Software Engineer, XMLBus Preparing Your Enterprise for Web Services

2. © Copyright IONA Technologies 2002 Integration: The “Killer App” for Web Services Set of industry standards for distributed computing Service-oriented architectures enable End to Anywhere™ integration E2A changes the economics of integration Web services is the driving technology – Simple – Effective – Unanimous industry support

3. © Copyright IONA Technologies 2002 The Statement Web Services should not be a regurgitation of existing infrastructure but should build on top of that infrastructure to define a set of flexible services to handle the evolving needs of a business.

4. © Copyright IONA Technologies 2002 The Agenda The Typical Web Service of Today The Need for Coarser Grained Web Services Separating Interface from Implementation Operation Flow Designer

5. © Copyright IONA Technologies 2002 The Present- How it is  Companies with existing CORBA and EJB services are exposing those services directly as Web Services.  This solution is too fine-grained and locks Web Service to interface of EJB/CORBA

6. © Copyright IONA Technologies 2002 The Future- How it Should Be Ease of Composition: Through a graphical user interface Ease of Change: to support new and evolving business processes and requirements Ease of aggregation: Grouping disparate applications within the value chain together to fulfill new business requirements

7. © Copyright IONA Technologies 2002 The Future is Now-Interface Mapping What Interface Mapping Does  Breaks the tie between the Web Service interface exposed by WSDL and the EJB/CORBA interfaces by defining a single Web Service based upon multiples existing EJB/CORBA services  Avoids fine-grained Web Services which leads to unnecessary chatter on the wire  Allows user to rapidly generate a Web Service based upon existing services. Low cost of building and destroying Web Services

8. © Copyright IONA Technologies 2002 Interface Mapping What Interface Mapping Is Not  Interface Mapping is NOT workflow  Interface Mapping involves making fine-grained invocations that are not long-term in scope  Interface Mapping is limited to leveraging existing EJB and CORBA services and is not about Document management/flow

9. © Copyright IONA Technologies 2002 From EJB to Web Service //HOME Interface public interface iBankAuthorizationHome extends EJBHome { public iBankAuthorization create() throws RemoteException, CreateException; } //Remote Interface public interface iBankAuthorization extends EJBObject { public void logout() throws RemoteException; public int login(String userName, String password) throws RemoteException, iBankLoginException public int newAccount(String userName, String password) throws RemoteException, CreateException }

10. © Copyright IONA Technologies 2002 From EJB to Web Service //HOME Interface public interface iBankAccountHome extends EJBHome { iBankAccount create(Integer accountID, double balance) throws RemoteException, CreateException; iBankAccount findByPrimaryKey(Integer accountIDKey) throws FinderException, RemoteException; } //REMOTE Interface public interface iBankAccount extends EJBObject { public String getName() throws RemoteException public double getBalance() throws RemoteException public void deposit(double amount) throws RemoteException, public void withdraw(double amount) throws RemoteException public void setPassword(String oldPassword, String newPassword) throws RemoteException }

11. © Copyright IONA Technologies 2002 Network Chatter-Invoking the EJBs Obtaining Account Information(Balance, Name, ID) Object obj = ctx.lookup("java:comp/env/ejb/iBankAuthorization"), iBankAuthorizationHome iBankAuthHome = (iBankAuthorizationHome)PortableRemoteObject.narrow(obj, iBankAuthorizationHome.class); iBankAccountHome accountHome = (iBankAccountHome)PortableRemoteObject.narrow( ctx.lookup("java:comp/env/ejb/iBankAccount"), iBankAccountHome.class); iBankAuthorization iBankAuth = iBankAuthHome.create(); int acctID = iBankAuth.login(name, password); account = accountHome.findByPrimaryKey(new Integer(acctID)); Float balance = account.getBalance(); String accountName = account.getName();

12. © Copyright IONA Technologies 2002 Avoiding Network Chatter The Problem- How do you construct a Web Service which returns all account information –Turning each method call into a Web Service leads to highly chatty, fat Web Services –Web Services mimic EJB interfaces The Solution-Operation Flow Designer –Graphical based tool for linking EJB and CORBA invocations without having to write code –Allows user to assemble a Web Service whose interface is loosely coupled to existing EJB/CORBA services –Free to define a Web Service interface any way you want

13. © Copyright IONA Technologies 2002 Creating a Home Lookup Activity

14. © Copyright IONA Technologies 2002 Creating a Home Lookup Activity

15. © Copyright IONA Technologies 2002 Creating a Method Activity

16. © Copyright IONA Technologies 2002 Associating Activities

17. © Copyright IONA Technologies 2002 The Whole Enchilada

18. © Copyright IONA Technologies 2002 The Abstract Interface-WSDL -

19. © Copyright IONA Technologies 2002 History Founded in Ireland in 1991; IPO on Nasdaq in 1997 Global company with headquarters in Dublin, Ireland and Waltham, MA Financial Performance Calendar year 2001 statistics –Revenues $181 million (65% license / 35% services) –Positive operating margins Team Over 900 employees in over 30 offices worldwide with a sales force of over 300 Strong blue chip customer and partner base IONA is a leading provider of comprehensive, standards-based enterprise infrastructure solutions for customers to build, deploy and integrate mission-critical applications that power core business processes The IONA Story

20. © Copyright IONA Technologies 2002 20 Integration broker platform Connects existing applications and services Allows creation of automated business process flows across extended enterprise using Web Services and XML standards Application server platform for developing, deploying and managing business application logic Hosted in J2EE, CORBA or mainframe environments using Web services standards It Takes A Platform

21. © Copyright IONA Technologies 2002 Orbix E2A ™ “Best Web Services Product” Simplifies EAI, B2Bi, and BPM

22. © Copyright IONA Technologies 2002 Web Services Integration Now! XMLBus.comVisit XMLBus.com and download Orbix E2A™ XMLBus Edition. Sign up for IONA training on Web services XMLBus.comDownload IONA’s Web services white paper at XMLBus.com Check out Orbix E2A™, the first e- Business Platform for Web Services Integration.

23. © Copyright IONA Technologies 2002 Upcoming Webcasts Don’t forget IONA World October 27 - 30th, San Diego, CA PART 3: B2B Collaboration: Expanding Web Services Architectures Tuesday, May 28

24. © Copyright IONA Technologies 2002 Questions?

25. © Copyright IONA Technologies 2002 I Want My MTV! To experiment with the Operation Flow Designer go to: www.xmlbus.com and download XMLBus