| Thomas, Anne. Enterprise JavaBeans -- Server Component Model for Java, Patricia Seybold Group, December 1997 (ww.psgroup.com) |
....software components (custom built or Commercial O the Shelf (COTS) in a framework. This paradigm is becoming increasingly important owing to the maturation of several underlying technologies such as OMG s CORBA[7] Microsoft s . NET framework[8] Sun s Enterprise Java Beans framework [9]. Recent developments such as the shift from centralised mainframe based to distributed applications and the need to reuse existing resources in the business and organisational contexts[10] are accelerating the use of CBSE for application development. However, reuse of components in CBSE di ers ....
Thomas, A.: Enterprise JavaBeans: Server Component Model for Java. http: //www.javasoft.com/products/ejb (1997)
....implementation of 800 number translation, and replace it with another vendor s implementation that offers better functionality (e.g. is more up to date) performance (e.g. better caching or search algorithms) or cost. Current software component technology like JavaBeans, and Enterprise JavaBeans [6, 9], offers support for discovering the attributes of a software component at run time by means of standardized naming conventions, and, given further standardization of the service interface itself, allowing components to be plugged in for use dynamically. The issue of managing software ....
A. Thomas, " Enterprise JavaBeans: Server component model for Java," Patricia Seybold Group White Paper, Dec. 1997. Available from http://java.sun.com/products/ejb/white_paper.html
....and the rigidity of the browser http server combination what creates serious problems that make it ill suited for b2b e commerce. On one hand, we lose control of the end to end communications, so if we want to operate in some particular way in the client side, we ll need to use Java applets[Tho98], which still don t operate flawlessly and depend on which browser we are using. On the other hand, the web browser is a tool that depends on the user feeding it some input so it s not easy to provide the automation needed for unattended installations. 4 3 Field of activity Before proceeding to ....
A. Thomas. Enterprise Java Beans: Server Component Model for the Java Platform. Patricia Seybold Group for Sun Microsystems. December 1998.
....business and organisational context in which these applications are being developed[4] are also driving CBSE forward. Three component infrastructure technologies OMG s CORBA[19] Microsoft s Component Object Model (COM) and Distributed COM (DCOM) 3] and Sun s JavaBeans and Enterprise JavaBeans[22] have matured and have become somewhat standardised. These technologies provide the communication and coordination that are required to construct applications from components. Recent developments in the business and organisational context that are promoting CBSE include[4] the shift in ....
A. Thomas. Enterprise JavaBeans: Server Component Model for Java, White paper. http://www.javasoft. com/products/ejb/, Dec 1997.
....with the Java component model, JavaBeans [22] JavaBeans were initially only defined for application components, providing well defined hooks for customising components and for integration with application builders. This has now been extended to server side components, termed Enterprise JavaBeans [23]. Enterprise JavaBean are components that are intended to run in a container that manages the lifecycle of components and provides them with support for remote interactions, naming, transaction, persistency and multithreading, freeing the component developer of these concerns. A component can be ....
Thomas, A.; Enterprise JavaBeans: Server Component Model for Java; White paper; http://java.sun.com; December 1997.
.... project are: Jacobson describes the inclusion of variability points into a faade, this may provide a good common mechanism for identifying the variability mechanisms that are available with many component technologies such the emerging CORBA Component [21] standard and Enterprise Java Beans [22]. Some assessment of how easy it is for re users to comprehend component faades and assess the impact of required white box modifications. The UML representation of components and their interfaces needs to be better supported in other modelling views such as interaction diagrams. To ....
Thomas, A., Enterprise JavaBeans: Server Component Model for Java, White paper, http://java.sun.com, December 1997.
....and space of component assembly in a visual builder. 2. To present the new ContextBox tool, which enhances the BeanBox from Sun by adding the ability to also manipulate beans implementing the BeanContext interface. The first objective is useful in understanding other software component models [14, 17, 19, 20], while the second is strongly related to the JavaBeans technology. Design and implementation issues, which were omitted due to space limitation, can be found in further detail in [13] These may be of help to others who wish to create enhancements of their own. Our ContextBox is a strict ....
A. Thomas. Enterprise JavaBeans server component model for Java. Prepared for Sun Microsystems by Patricia Seybold Group, 1997.
....objects such as BofRequestMgr. All messages are sent to an XO by getting its handle through the token and sending a request to the BofRequestMgr. Each request is represented by an instance of a Semantic Data Object. 3.3 Enterprise JavaBeans Sun released version 0. 9 of Enterprise Java Beans [15] in February 1998. EJB extends Java with a distribution infrastructure layer and parts of the BOF layer of the comparison model. Conceptual Model The EJB architecture defines three components with different roles in the management of enterprise beans. An Enterprise JavaBeans class represents the ....
A. Thomas. Enterprise JavaBeans: Server Component Model for Java. Technical report, Patricia Seybold Group, 85, Devonshire Street, Boston Mass. 02109, DEC 1997.
....as network distribution of components, and the reuse and interoperation of components over the Internet. Now, a few set of technologies have been widely deployed and are still evolving. They include ActiveX DCOM from Microsoft [Micr98] CORBA from OMG [OMG98] and JavaBeans from SUN Microsystems [Thom97]. 2 COMPINENT BASED SOFTWARE ENGINEERING 2.1 What is Software Components There are a number of definitions on software components [Same97] However, in the context of CBSE, we emphasizes plug play software components so that software can be composed with components like hardware. Thus, software ....
A. Thomas, Enterprise JavaBeans: Server Component Model for Java, White Paper, Dec. 1997, http://www.javasoft.com/products/ejb/.
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Thomas, Anne. Enterprise JavaBeans -- Server Component Model for Java, Patricia Seybold Group, December 1997 (ww.psgroup.com)
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