Get COM Beyond Microsoft: Designing and Implementing COM Servers PDF

By Terence Sherlock

ISBN-10: 1555582265

ISBN-13: 9781555582265

* First e-book on a arguable subject significantly very important to many huge enterprises * Authors are between few in with suitable adventure the 1st ebook to explain how Microsoft's part item version (COM) should be supported on desktops except home windows. Drawing on Compaq's groundbreaking paintings of porting COM/DCOM to its OpenVMS and Tru64 UNIX Alpha systems, COM past Microsoft explains how the COM common will help organizations combine their purposes throughout a heterogeneous computing setting. This e-book information the cutting edge COM help now local on Tru64 UNIX and OpenVMS and divulges how builders can take advantage of COM on OpenVMS and COM on Tru64 UNIX to create moveable software program elements that run almost unchanged on OpenVMS, Tru64 UNIX, home windows NT, home windows 2000, and different significant computing structures.

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Additional info for COM Beyond Microsoft: Designing and Implementing COM Servers on Compaq Platforms

Sample text

Connor Collectibles: monolithic order entry Server Terminal Existing application Interface Terminal Function1 Function2 Function3 Terminal COM-12 The additional terminals seemed to work well at first, but operators started to notice that more and more items that were supposed to be in stock were appearing on the invoices as back ordered. The inventory confusion was becoming a customer satisfaction issue: 40 Part I: COM on Compaq Platforms customers didn’t like hearing that something was in stock at the start of the order, but then was listed as out-of-stock when the shipment arrived.

Figure 15. Functional encapsulation Server Client COM client Interface Function1 Client Function2 COM client Function3 COM servers (wrappers) COM-9 There are several layers of a traditional procedural application that you can encapsulate: the user interface (UI), the database, and the data manipulation routines. User interface If you choose to encapsulate the user interface, the UI could be supported on some other platform (for example, from a graphical user interface [GUI] on a Windows NT system).

You can implement a Java application as a client-side app or server-side app. For comparisons with COM on Compaq platforms, I’ll focus on server-side Java and EJB. The object-oriented facilities of Java are essentially those of C++, with extensions from Objective C for more dynamic method resolution. The Java language and Java virtual machine (JVM) provide the local execution environment, but Enterprise Java is the platform that extends Java applications across machines and across the Internet.

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COM Beyond Microsoft: Designing and Implementing COM Servers on Compaq Platforms by Terence Sherlock

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