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Service Oriented Architecture
In software engineering, service-oriented architecture (SOA) is an architectural style that focuses on discrete services instead of a monolithic design. SOA is a good choice for system integration. By consequence, it is also applied in the field of software design where services are provided to the other components by application components, through a communication protocol over a network. A service is a discrete unit of functionality that can be accessed remotely and acted upon and updated independently, such as retrieving a credit card statement online. SOA is also intended to be independent of vendors, products and technologies. Service orientation is a way of thinking in terms of services and service-based development and the outcomes of services. A service has four properties according to one of many definitions of SOA: # It logically represents a repeatable business activity with a specified outcome. # It is self-contained. # It is a black box for its consumers, meaning th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software Engineering
Software engineering is a branch of both computer science and engineering focused on designing, developing, testing, and maintaining Application software, software applications. It involves applying engineering design process, engineering principles and computer programming expertise to develop software systems that meet user needs. The terms ''programmer'' and ''coder'' overlap ''software engineer'', but they imply only the construction aspect of a typical software engineer workload. A software engineer applies a software development process, which involves defining, Implementation, implementing, Software testing, testing, Project management, managing, and Software maintenance, maintaining software systems, as well as developing the software development process itself. History Beginning in the 1960s, software engineering was recognized as a separate field of engineering. The development of software engineering was seen as a struggle. Problems included software that was over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SaaS
Software as a service (SaaS ) is a cloud computing service model where the provider offers use of application software to a client and manages all needed physical and software resources. SaaS is usually accessed via a web application. Unlike other software delivery models, it separates "the possession and ownership of software from its use". SaaS use began around 2000, and by 2023 was the main form of software application deployment. Unlike most self-hosted software products, only one version of the software exists and only one operating system and configuration is supported. SaaS products typically run on rented infrastructure as a service (IaaS) or platform as a service (PaaS) systems including hardware and sometimes operating systems and middleware, to accommodate rapid increases in usage while providing instant and continuous availability to customers. SaaS customers have the abstraction of limitless computing resources, while economy of scale drives down the cost. SaaS ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IEEE
The Institute of Electrical and Electronics Engineers (IEEE) is an American 501(c)(3) organization, 501(c)(3) public charity professional organization for electrical engineering, electronics engineering, and other related disciplines. The IEEE has a corporate office in New York City and an operations center in Piscataway, New Jersey. The IEEE was formed in 1963 as an amalgamation of the American Institute of Electrical Engineers and the Institute of Radio Engineers. History The IEEE traces its founding to 1884 and the American Institute of Electrical Engineers. In 1912, the rival Institute of Radio Engineers was formed. Although the AIEE was initially larger, the IRE attracted more students and was larger by the mid-1950s. The AIEE and IRE merged in 1963. The IEEE is headquartered in New York City, but most business is done at the IEEE Operations Center in Piscataway, New Jersey, opened in 1975. The Australian Section of the IEEE existed between 1972 and 1985, after which it s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Encapsulation (computer Science)
Encapsulation may refer to: Chemistry * Molecular encapsulation, in chemistry, the confinement of an individual molecule within a larger molecule * Micro-encapsulation, in material science, the coating of microscopic particles with another material Biology * Cell encapsulation, technology made to overcome the existing problem of graft rejection in tissue engineering applications Computing and electronics * An alternate term for conformal coating or potting, which protects electronic components * Encapsulation (networking), the process of adding control information as it passes through the layered model * Encapsulation (computer programming) In software systems, encapsulation refers to the bundling of data with the mechanisms or methods that operate on the data. It may also refer to the limiting of direct access to some of that data, such as an object's components. Essentially, enca ..., the combination of program code and data, and/or restriction (hide) of access t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Service Reusability Principle
The service reusability principle is a design principle, applied within the service-orientation design paradigm, to create services that can be reused across a business. Thomas Erl, Herbjörn WilhelmseSOA Pattern of the Week (#4): Service NormalizationOnline]. Date accessed: 14 April 2010. These reusable services are designed so that their solution logic is independent of any particular business process or technology. Purpose Service reusability is typically measured by how much extra functionality a service contains that could be reused in future, and how much of the service’s functionality goes beyond the current requirements. This encourages services that contain extra capabilities built around possible future service usage scenarios. However, little is done in designing the service logic in a manner that it could be reused to automate multiple business processes. This results in more focus on equipping services with extra functionality than concentrating on making the core ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Service Discovery
Service discovery is the process of automatically detecting devices and services on a computer network. It aims to reduce the manual configuration effort required from users and administrators. A service discovery protocol (SDP) is a network protocol that helps accomplish service discovery. Service discovery requires a common language to allow software agents to make use of one another's services without the need for continuous user intervention. Protocols There are many service discovery protocols, including: * Bluetooth Service Discovery Protocol (SDP) * Bonjour, e.g., Apple AirPrint * DNS Service Discovery (DNS-SD), a component of zero-configuration networking * DNS, as used for example in Kubernetes * Dynamic Host Configuration Protocol (DHCP); its classification as a service discovery protocol is controversial * Internet Storage Name Service (iSNS) * Jini for Java objects. * Lightweight Service Discovery (LSD), for mobile ad hoc networks * Link Layer Discovery P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Service Composability Principle
In computing, service composability is a design principle, applied within the service-orientation design paradigm, that encourages the design of services that can be reused in multiple solutions that are themselves made up of composed services. The ability to recompose the service is ideally independent of the size and complexity of the service composition. This principle is directly responsible for the agility promised by SOA as it promotes composing new solutions by reusing existing services.Michael PouliEvolution of principles of Service Orientation: Service Statelessness, part 7Online].Date accessed: 21 April 2010. Purpose The concept of developing software out of independently existing components encourages the concept of composition. This is the underlying concept within object-orientation where the end product is composed of several interlinked objects that have the ability to become part of multiple software solutions, no matter how complex the solution is. The same compo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Service Granularity Principle
In the context of software engineering and software architecture, service granularity is a key design concern when applying the paradigm of service-orientation for instance during service-oriented modeling. Service granularity specifies the scope of business functionality and the structure of the message payload in a service operation that is provided within a service-oriented architecture (SOA). Definition Service granularity is both an application domain concern (''business granularity''), as well as a software interface design issue (''technical granularity''); it is a property of the service contract exposed by a service provider. It pertains to the semantics and syntax of the in (request) and out (response) message content, which can be viewed as instances of two general Enterprise Integration PatternsCommand Messagean By definition a coarse-grained service operation has broader scope than a fine-grained service, although the terms are relative. The former typically requires ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Service Statelessness Principle
Service statelessness is a design principle that is applied within the service-orientation design paradigm, in order to design scalable services by separating them from their state data whenever possible.Wojciech Cellary, Sergiusz StrykowskE-Government Based on Cloud Computing and Service-Oriented ArchitectureOnline].Date accessed: 19 April 2010. This results in reduction of the resources consumed by a service as the actual state data management is delegated to an external component or to an architectural extension. By reducing resource consumption, the service can handle more requests in a reliable manner.IBM Red BookPower Systems and SOA SynergyOnline].Date accessed: 21 April 2010. Purpose The interaction of any two Computer program, software programs involves keeping track of the interaction-specific data as each subsequent interaction may depend upon the outcome of the previous interaction. This becomes more important in distributed architectures where the client and the ser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Service Autonomy Principle
Service autonomy is a design principle that is applied within the service-orientation design paradigm, to provide services Service may refer to: Activities * Administrative service, a required part of the workload of university faculty * Civil service, the body of employees of a government * Community service, volunteer service for the benefit of a community or a ... with improved independence from their execution environments.Wojciech Cellary, Sergiusz StrykowskE-Government Based on Cloud Computing and Service-Oriented ArchitectureOnline].Date accessed: 17 April 2010. This results in greater reliability, since services can operate with less dependence on resources over which there is little or no control. Purpose The service-orientation design paradigm emphasizes service reuse as dictated by the Service reusability principle, service reusability design principle. Under this paradigm of a heavily reused services, reliability becomes critical to ensure service longevity. In t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Service Abstraction
Service abstraction is a design principle that is applied within the service-orientation design paradigm so that the information published in a service contract is limited to what is required to effectively utilize the service The service contract should not contain any superfluous information that is not required for its invocation. Also that the information should be limited to the serviced contract (technical contract and the service level agreement) only, no other document or medium should be made available to the service consumers other than the service contract that contains additional service related information. Purpose A service contract that contains details about what it encapsulates (e.g., the logic, implementation and the technology used to build the service) may end up being used in a particular manner by providing the service consumer more knowledge about the working of the service. In the case of service-orientation, more knowledge is not necessarily better. There i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Service Description
In information technology, a service description is a description of a service that explains how the service can be used by clients. The exact meaning of the term depends on context. In IT service management In IT service management, a service is something provided by people to other people. Certain frameworks to describe IT service management use the term service description; for instance, it may be a standard part of a service level agreement. In software systems In software systems with a service-oriented architecture, certain parts of the software act as services that other parts of the software invoke by sending a request and receiving a response in return. Many different ways of doing this have been developed over time; some have developed into standards, such as CORBA and SOAP Soap is a salt (chemistry), salt of a fatty acid (sometimes other carboxylic acids) used for cleaning and lubricating products as well as other applications. In a domestic setting, so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
