SOA

SOA ?

SOA is a architecture for building business applications using loosely coupled services which act like black boxes and can be orchestrated to achieve a specific functionality by linking together


business layers and plumbing layers in SOA

In SOA we can divide any architecture in two layers. The first which has direct relevance to business as it carries out business functions. The second layer is a technical layer which talks about managing computer resources like database, web server etc


Dfference between components and services ?

Services are logical grouping of components to achieve business functionality. Components are implementation approaches to make a service. The components can be in JAVA, C#, C++ but the services will be exposed in a general format like Web Services

Are web-services SOA ? 

SOA is a thinking, it’s an architectural concept and web service is one of the technical approach to complete it. Web services are the preferred standards to achieve SOA.

• In SOA we need the services to be loosely coupled. A web service communicates using SOAP protocol which is XML based which is very loosely coupled. It answers the what part of the service.
• SOA services should be able to describe themselves.WSDL describes how we can access the service.
• SOA services are located in a directory.UDDI describes where we can get the web service. This nothing but implementation of SOA registry