C. Goswell. The COM programmer's cookbook, Sept. 1995.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....not necessarily unique and fundamentally different from existing techniques to solve related problems. In particular, the model and implementation uses ideas from schema evolution in object oriented databases [6, 7, 8, 19, 22, 54, 55, 56, 62, 63, 64] and from Microsoft s Component Object Model [15, 26, 53]. However, these approaches were not designed for distributed object computing systems, which impose different constraints and challenges. High level designs appropriate for this environment have not yet been developed to take advantage of the existing low level mechanisms. This dissertation is ....

....in the system. Section 7.1 of the related work chapter describes several different mechanisms for loading new executable code at run time. These mechanisms are present in underlying languages such as Java [25] operating systems including Unix, and binary interoperability standards like COM [26]. A DCDO must be able to contain a call to code that does not yet exist in the object, and to have the call execute properly once the appropriate code is loaded into the object. If an object s implementation characteristics can support this, then DCDOs can be built into the system. 2.9.4 Public ....

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Goswell, C., "The COM programmer's cookbook," Microsoft Corporation, Spring 1995.

....them according to the rules of a component standard or component integration architecture. Such a standard is a set of design rules meant to guarantee that independently designed components can be integrated in defined ways without undue effort. Examples of component standards are Microsoft s COM [2,5,9,13,16], Sun s JavaBeans [4] and the CORBA object model [15] Collectively, the rules of a component standard define a number of component instantiation, interoperation, composition, lifetime control, and other structures and mechanisms. Some of these mechanisms must be implemented by all compliant ....

....denies components within an aggregate the ability to make decisions based on the distinct component identities. This property is not made explicit in the COM specification or in many other widely published descriptions of COM. It is alluded to in Goswell s highly technical and detailed Cookbook [5]. 23 The proof of this theorem is given in Appendix A. In a nutshell, because QueryInterface operations on inner components delegate to interfaces of outer components, queries on an inner interfaces for IID IUnknown return the identity IUnknown of the outer component. Theorems 2 and 3 show that ....

C. Goswell, "The COM Programmer's Cookbook," Microsoft Office Product Unit, Spring 1995, revised September 13, 1995, Available on the World-Wide Web at the time of submission of this paper through http://www.microsoft.com/oledev/olecom/com_co.htm

....at run time [14] and other languages like Kali Scheme [9] and Erlang [5] contain similar mechanisms. The COM programming model and binary interoperability standard allows different components of a running application to evolve separately from one another without causing undefined function errors [8, 15, 25]. Dynamically linked libraries partition a program into parts that can be built and changed separately [33] And mobile agent systems transfer runnable code between active entities in a distributed system [1, 2, 7, 18, 19, 29, 35] However, these approaches alone are inappropriate for ....

Goswell, C., "The COM programmer's cookbook," Microsoft Corporation, Spring 1995.

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C. Goswell. The COM programmer's cookbook, Sept. 1995.

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