Koexistenz von CORBA und J2EE in unternehmensweiten Anwendungen

1 'U %HUQKDUG +ROOXQGHU ,QWHUDFWLYH 2EMHFWV 6RIWZDUH *PE+ .RH[LVWHQ] YRQ &25%$ XQG -(( LQ XQWHUQHKPHQVZHLWHQ $QZHQGXQJHQ Interactive Objects Software GmbH Tel. [+49] 0761 / 4 00 73 - 0 Basler Str. 63 - 65 Fax [+49] 0761 / 4 00 73 - 73 D-79100 Freiburg eMail:hollunder@io-software.com Web: http://www.io-software.com Version 1.0, January 2001 Interactive © iO Software GmbH Objects 2 6WUXFWXUH RI WKH 3UHVHQWDWLRQ u Introduction and Motivation n Convergence in business and software design u Technology Review n CORBA and J2EE/EJB u Enterprise Application Integration (EAI) with CORBA and J2EE/EJB n Three case studies u Conclusions Interactive © iO Software GmbH Objects $ PDMRU SUREOHP &RQFHSWXDO 'LYHUJHQFH 3 7KH WUDQVODWLRQ ORVV IURP D EXVLQHVV PRGHO RU QR EXVLQHVV PRGHO WR D GHVLJQ WR DQ LPSOHPHQWDWLRQ DQG GHSOR\PHQW WHFKQRORJ\ LV WKH PRVW VLJQLILFDQW VRXUFH RI WRGD\¶V ,7 SUREOHPV 'LYHUJHQW HQJLQHHULQJ Business System Software System Interactive © iO Software GmbH Objects 7KH VROXWLRQ ³&RQYHUJHQFH´ 4 7KH &RQYHUJHQW (QJLQHHULQJ VROXWLRQ LV WKH V\QWKHVLV RI EXVLQHVV DQG VRIWZDUH HQJLQHHULQJ  LVRPRUSKLF YLHZV RI RQH V\VWHP Business Perspective Software Perspective Interactive © iO Software GmbH Objects &RQYHUJHQW &RPSRQHQWV 5 %DVLF SURSHUWLHV Component Business object Semantic Coupling (technical of the business implementation) model u Grouping of logically related objects. u Separation of n business dimension and n IT dimension (persistence, transaction, distribution, etc.). u Runtime environment through containers. u Application creation consists of n development, assembly, and deployment. Interactive © iO Software GmbH Objects &RPSRQHQW 7HFKQRORJLHV 6 53&V Å 25%V Å &RPSRQHQW DUFKLWHFWXUHV u Evolution of distributed computing towards component-based architectures n Remote Procedure Call (RPC, DCE, …) n Object Request Broker (CORBA, DCOM, …) n Component architectures (EJB, CORBA Components, …) u Goals n High degree of standardization n Portability and reuse of components n Component market n Flexible deployment model n … Interactive © iO Software GmbH Objects 2EMHFW 0DQDJHPHQW *URXS 20* 7 7KH ³0RWKHU´ RI &25%$ u The OMG specifies (besides other aspects) n Architecture for distributed object computing (CORBA) n Object services (Naming, Transaction, Life cycle, etc.) n Communication protocol IIOP n CORBA Components (> 650 pages!) u Features of the CORBA approach n Programming language independence n Mature CORBA implementations l but currently no complete support for CORBA Components n No complete development environment n Web integration through further technologies (e.g. CGI) Interactive © iO Software GmbH Objects 8 $UFKLWHFWXUH RI &25%$EDVHG $SSOLFDWLRQV CORBA (server) runtime environment GUI- IIOP Applications (Java, C++, VB) Data Business components IIOP Java-Applets Legacy Utility applications components Interactive © iO Software GmbH Objects -DYD  3ODWIRUP (QWHUSULVH (GLWLRQ -(( 9 7KH -(( $SSOLFDWLRQ 0RGHO FI KWWSMDYDVXQFRPMHHEOXHSULQWV Interactive © iO Software GmbH Objects 10 -DYD  3ODWIRUP (QWHUSULVH (GLWLRQ -(( u Goals n Simplify the development of highly scalable and highly available internet or intranet based applications n Cross-platform, cross-vendor portability u J2EE provides a suite of technologies such as n Servlets and JavaServer Pages (JSP) n Enterprise JavaBeans (EJB) n Naming, Messaging, Database Connectivity and others. u Implementations n J2EE reference implementation by SUN (J2EE SDK) n WebLogic, WebSphere, Borland AS, … Interactive © iO Software GmbH Objects (QWHUSULVH $SSOLFDWLRQ ,QWHJUDWLRQ ($, ZLWK 11 &25%$ DQG -(((-% u Companies have set up a CORBA environment n Infrastructure for the development of new components n Access to corporate data n Wrapping of legacy appl. and mainframe connectivity n Primary focus was not on Internet-centric architecture. u There is an increasing demand for n Multi-channel web application development n EAI with existing Intranet infrastructure n Internet B2B with external entities n Leveraging web application servers based on J2EE. Interactive © iO Software GmbH Objects (QWHUSULVH $SSOLFDWLRQ ,QWHJUDWLRQ ($, ZLWK 12 &25%$ DQG -(((-% u Three scenarios: n J2EE dominance n J2EE / CORBA integration n Full J2EE / CORBA interoperability u Main differences between the scenarios: n Location of the business object model implementation n Uni- versus bi-directional communications J2EE and CORBA environment. n Reuse of existing CORBA components. Interactive © iO Software GmbH Objects 13 6FHQDULR 2QH -(( GRPLQDQFH u Most parts of the application are implemented according to the J2EE application model: n Web access through Servlets and JavaServer Pages n Implementation of the business object model based on Enterprise JavaBeans (EJB) n Connectivity to Enterprise Information System (EIS) u The CORBA system is a specific EIS n Access to mainframe systems n Service provider (e.g.