The idea that software should be componentized - built from prefabricated components - was first published in Douglas McIlroy's address at the NATO conference on software engineering in Garmisch, Germany, 1968 titled Mass Produced Software Components. This conference set out to counter the so-called software crisis. His subsequent inclusion of pipes and filters into the Unix operating system was the first im ...

See also:

Software componentry, Software componentry - Software component, Software componentry - History, Software componentry - Differences from object-oriented programming, Software componentry - Architecture, Software componentry - Technologies, Software componentry - Literature

Read more here: » Software componentry: Encyclopedia II - Software componentry - History

See also:

Software componentry, Software componentry - Software component, Software componentry - History, Software componentry - Differences from object-oriented programming, Software componentry - Architecture, Software componentry - Technologies, Software componentry - Literature

Read more here: » Software componentry: Encyclopedia II - Software componentry - Software component

The idea in object-oriented programming (OOP) is that software should be written according to a mental model of the actual or imagined objects it represents. OOP and the related disciplines of object-oriented design and object-oriented analysis focus on modelling real-world interactions and attempting to create 'verbs' and 'nouns' which can be used in intuitive ways, ideally by end users as well as by programmers coding for those end users. Software componentry, by contrast, makes no such assumptions, and instead states that software ...

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Software componentry, Software componentry - Software component, Software componentry - History, Software componentry - Differences from object-oriented programming, Software componentry - Architecture, Software componentry - Technologies, Software componentry - Literature

Read more here: » Software componentry: Encyclopedia II - Software componentry - Differences from object-oriented programming

Component Object Model (COM) is a Microsoft platform for software componentry introduced by Microsoft in 1993. It is used to enable interprocess communication and dynamic object creation in any programming language that supports the technology. COM is often used in the software development world as an umbrella term that encompasses the OLE, ActiveX, COM+ and DCOM technologies. Although COM was introduced in 1993, Micros ...

Including:

Component Object Model - History Component Object Model - Related technologies
Component Object Model - COM+ Component Object Model - DCOM Component Object Model - .NET
Component Object Model - Internet Security Component Object Model - Technical details
Component Object Model - Interfaces Component Object Model - Registry Component Object Model - Reference Counting Component Object Model - Instantiation Component Object Model - Reflection Component Object Model - Programming Component Object Model - Application and Network Transparency Component Object Model - Threading in COM
Component Object Model - Criticisms
Component Object Model - Environment Initialization Component Object Model - Reference Counting Component Object Model - DLL Hell

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CCM can stand for several things: Cerebral cavernous malformations, a genetic brain disorder Cisco CallManager The College-Conservatory of Music at the University of Cincinnati Contemporary Christian music, or CCM The CORBA Component Model, a portion of the CORBA standard for software componentry The Chama Cha Mapinduzi political party of Tanzania CCM Motorcycles, a UK motorcycle manufacturer cubic centimetre (the correct symbol is cm³ or ml) Change

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In computing, Common Object Request Broker Architecture (CORBA) is a standard for software componentry, created and controlled by the Object Management Group (OMG). It defines APIs, communication protocol, and object/service information models to enable heterogeneous applications written in various languages running on various platforms to interoperate. CORBA therefore provides platform and location transparency for sharing well-defined obje ...

Including:

CORBA - Key Features
CORBA - Objects by Value OBV CORBA - CORBA Component Model CCM CORBA - Portable interceptors CORBA - General InterORB Protocol GIOP CORBA - Internet InterORB Protocol IIOP
CORBA - CORBA implementations CORBA - OMG trademarks

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Process pipelines were invented by Douglas McIlroy, one of the designers of the first Unix shells, and greatly contributed to the popularity of that operating system. It can be considered the first non-trivial instance of software componentry. The idea was eventually ported to other operating systems, such as DOS, OS/2, Windows NT, BeOS, and Mac OS X. ...

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Pipeline software, Pipeline software - Multiprocessed pipelines, Pipeline software - Pseudo-pipelines, Pipeline software - Other considerations, Pipeline software - History

Read more here: » Pipeline software: Encyclopedia II - Pipeline software - History

A piece of software is provided access to computer resources (such as memory, CPU, storage, etc.) by its underlying computer system; the availability of these resources to other software can have major ramifications -- sometimes disastrous ones -- for its functionality and stability. A key principle of component-based design is to prohibit access to all resources by default, allowing access only through ...

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Interface computer science, Interface computer science - Interfaces in practice, Interface computer science - Uses of interfaces

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The concept of interface is the cornerstone of modular programming, a forerunner and a standard ingredient of object-oriented programming. In object-oriented programming, an object's interface consists of a set of methods that the object must respond to. Note that the object does not make its instance variables a part of its interface - these are typically accessed by means of accessor methods. Some object-oriented programming languages mandate that the interface to the object be specified to the compiler separately from the implement ...

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Interface computer science, Interface computer science - Interfaces in practice, Interface computer science - Uses of interfaces

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On single-tasking operating systems, the processes of a pipeline have to be executed one by one in sequential order; thus the output of each process must be saved to a temporary file, which is then read by the next process. Since there is no parallelism or CPU switching, this version is called a "pseudo-pipeline". For example, the command line interpreter of MS-DOS ('COMMAND.COM') provides pseudo-pipelines with a syntax superficially similar to that of Unix pipelines. The command "dir | sort | more" would have been executed like this ...

See also:

Pipeline software, Pipeline software - Multiprocessed pipelines, Pipeline software - Pseudo-pipelines, Pipeline software - Other considerations, Pipeline software - History

Read more here: » Pipeline software: Encyclopedia II - Pipeline software - Pseudo-pipelines

A pipeline only allows information to flow in one direction, like water flows in a pipe. Pipes and filters can be viewed as a form of functional programming, using byte streams as data objects. The concept of pipeline is also central to the Cocoon web development framework where it allows a source stream to be modified before eventual display. The pipeline concept is also used by data mining tools such as TextPipe. This pattern encourages the use of text streams as the input and output of programs. This reliance on text has to be accounted when creating graphic shells to t ...

See also:

Pipeline software, Pipeline software - Multiprocessed pipelines, Pipeline software - Pseudo-pipelines, Pipeline software - Other considerations, Pipeline software - History

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COM programmers build their software using COM-aware components. Different component types are identified by class IDs (CLSIDs), which are Globally Unique Identifiers, or GUIDs. Each COM component exposes its functionality through one or more interfaces. The different interfaces supported by a component are distinguished from each other using interface IDs (IIDs), which are also GUIDs. COM interfaces have bindings in several languages, such as C, C++, D, Visual Basic, and several of the scripting languages implemented on the Windows p ...

See also:

Component Object Model, Component Object Model - History, Component Object Model - Related technologies, Component Object Model - COM+, Component Object Model - DCOM, Component Object Model - .NET, Component Object Model - Internet Security, Component Object Model - Technical details, Component Object Model - Interfaces, Component Object Model - Registry, Component Object Model - Reference Counting, Component Object Model - Instantiation, Component Object Model - Reflection, Component Object Model - Programming, Component Object Model - Application and Network Transparency, Component Object Model - Threading in COM, Component Object Model - Criticisms, Component Object Model - Environment Initialization, Component Object Model - Reference Counting, Component Object Model - DLL Hell

Read more here: » Component Object Model: Encyclopedia II - Component Object Model - Technical details

Pipelines are most efficiently implemented in a multitasking operating system, by launching all processes at the same time, and automatically servicing the data read requests by each process with the data that written with the upstream process. In this way, the CPU will be naturally switched among the processes by the scheduler so as to minimize its idle time. Usually, read and write requests are blocking operations, which means that the execution of the source process, upon writing, is suspended until all data could be written to the ...

See also:

Pipeline software, Pipeline software - Multiprocessed pipelines, Pipeline software - Pseudo-pipelines, Pipeline software - Other considerations, Pipeline software - History

Read more here: » Pipeline software: Encyclopedia II - Pipeline software - Multiprocessed pipelines

Pipelines are most efficiently implemented in a multitasking operating system, by launching all processes at the same time, and automatically servicing the data read requests by the each process with the data that written with the upstream process. In this way, the CPU will be naturally switched among the processes by the scheduler so as to minimize its idle time. Usually, read and write requests are blocking operations, which means that the execution of the source process, upon writing, is suspended until all data could be written to ...

See also:

Pipeline software, Pipeline software - Multiprocessed pipelines, Pipeline software - Pseudo-pipelines, Pipeline software - Other considerations, Pipeline software - History

Read more here: » Pipeline software: Encyclopedia II - Pipeline software - Multiprocessed pipelines

Serialization has a number of advantages. Serialization provides: a simple and robust way to make objects persistent a method of issuing remote procedure calls, e.g., as in SOAP a method for distributing objects, especially in software componentry such as COM, CORBA, etc. For some of these features to be useful, architecture independence must be maintained. For example, for maximal use of distribution, a computer running on a different hardware architecture should be able to reliably reconstruct a ...

See also:

Serialization, Serialization - Uses, Serialization - Consequences, Serialization - Human-readable serialization, Serialization - Programming language support, Serialization - Objective-C, Serialization - Java, Serialization - ColdFusion, Serialization - OCaml

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Serialization has a number of advantages. Serialization provides: a simple and robust way to make objects persistent a method of issuing remote procedure calls, e.g., as in SOAP a method for distributing objects, especially in software componentry such as COM, CORBA, etc. For some of these features to be useful, architecture independence must be maintained. For example, for maximal use of distribution, a computer running on a different hardware architecture should be able to reliably reconstruct a ...

See also:

Serialization, Serialization - General characteristics, Serialization - Uses, Serialization - Consequences, Serialization - Human-readable serialization, Serialization - Programming language support, Serialization - Objective-C, Serialization - Java, Serialization - ColdFusion, Serialization - OCaml

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.NET presents a platform-independent target for software development, with many built-in features including Internet integration and features intended to enhance security. It relies fully on software componentry and the component-oriented programming paradigm. In this respect it largely replaces the former Component Object Model (COM). The two primary components of .NET are the Common Language Infrastructure (CLI) and the Common Language Runtime (CLR). The CLI is a set of specifications for a runtime environment, including a common ty ...

See also:

Microsoft .NET, Microsoft .NET - Definition, Microsoft .NET - History, Microsoft .NET - Versions, Microsoft .NET - Enterprise infrastructure, Microsoft .NET - Standardization and Licensing, Microsoft .NET - .NET vs. Java EE, Microsoft .NET - .NET vs. COM, Microsoft .NET - .Net Remoting & XML WebServices, Microsoft .NET - .NET languages, Microsoft .NET - Built-in languages, Microsoft .NET - Some available third-party languages, Microsoft .NET - ASP.NET & ADO.NET, Microsoft .NET - Alternative implementations

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Anthony Williams, one of the more notable thinkers involved in the creation of the COM architecture, distributed a couple of internal papers in Microsoft that embraced the concept of software components; Object Architecture: Dealing With the Unknown - or - Type Safety in a Dynamically Extensible Class in 1988 and On Inheritance: What It Means and How To Use It in 1990. These provided the foundation of many, ...

See also:

Component Object Model, Component Object Model - History, Component Object Model - Related technologies, Component Object Model - COM+, Component Object Model - DCOM, Component Object Model - .NET, Component Object Model - Internet Security, Component Object Model - Technical details, Component Object Model - Interfaces, Component Object Model - Registry, Component Object Model - Reference Counting, Component Object Model - Instantiation, Component Object Model - Reflection, Component Object Model - Programming, Component Object Model - Application and Network Transparency, Component Object Model - Threading in COM, Component Object Model - Criticisms, Component Object Model - Environment Initialization, Component Object Model - Reference Counting, Component Object Model - DLL Hell

Read more here: » Component Object Model: Encyclopedia II - Component Object Model - History

COM was the major software development platform for Windows and, as such, influenced development of a number of supporting technologies. Component Object Model - COM+. With Windows 2000, a significant extension to COM named COM+ was introduced. At the same time, Microsoft de-emphasized DCOM as a separate entity. An advantage of COM+ was that it could be run in "component farms", managed with the built-in Microsoft Transaction Server. A component, if coded properly, could be reused by new call ...

See also:

Component Object Model, Component Object Model - History, Component Object Model - Related technologies, Component Object Model - COM+, Component Object Model - DCOM, Component Object Model - .NET, Component Object Model - Internet Security, Component Object Model - Technical details, Component Object Model - Interfaces, Component Object Model - Registry, Component Object Model - Reference Counting, Component Object Model - Instantiation, Component Object Model - Reflection, Component Object Model - Programming, Component Object Model - Application and Network Transparency, Component Object Model - Threading in COM, Component Object Model - Criticisms, Component Object Model - Environment Initialization, Component Object Model - Reference Counting, Component Object Model - DLL Hell

Read more here: » Component Object Model: Encyclopedia II - Component Object Model - Related technologies

The embedding of COM into the Internet Explorer web browser (under the name of ActiveX) created a combination of problems that has led to an explosion of computer virus, trojan and spyware infections. These malware attacks mostly depend on ActiveX for their activation and propagation to other computers. Microsoft recognized the problem with ActiveX as far back as 1996 when Charles Fitzgerald, program manager of Microsoft's Java team said "If you want security on the 'Net', unplug your computer. ... We never made the claim up front that Activ ...

See also:

Component Object Model, Component Object Model - History, Component Object Model - Related technologies, Component Object Model - COM+, Component Object Model - DCOM, Component Object Model - .NET, Component Object Model - Internet Security, Component Object Model - Technical details, Component Object Model - Interfaces, Component Object Model - Registry, Component Object Model - Reference Counting, Component Object Model - Instantiation, Component Object Model - Reflection, Component Object Model - Programming, Component Object Model - Application and Network Transparency, Component Object Model - Threading in COM, Component Object Model - Criticisms, Component Object Model - Environment Initialization, Component Object Model - Reference Counting, Component Object Model - DLL Hell

Read more here: » Component Object Model: Encyclopedia II - Component Object Model - Internet Security