SOA Patterns. Service Orientated Architecture (SOA\WCF) explained and defined for Executives. Service Orientated Architecture (SOA) is a big business buzzword tossed into conversations at board meetings and at executive briefings. At this level, however, SOA really refers to connecting disparate systems across application, department, corporate, and even industry boundaries. This is the “Big” SOA concept, and this is the realm of the enterprise architect, and the space of million dollar Service Bus applications, SAP systems and other wonderful products. Unfortunately the fact still remains that a chain is a strong as its weakest link, if the systems hooked up to the top of the range Service Bus are not rock solid and can not be trusted to produce the correct results all the time, then the some of the true potential of the investment is lost.
I call SOA at the application level “Little” SOA. SOA: How to design a service - Inside Architecture. I find myself in the situation of having to set down a design standard for SOA services. The thing is: SOA Services are much more than a technical artifact. They are a solution to a business architecture requirement for shared services, and the business architecture needs to exist first, or at least be tacitly understood and described, in order for the service to have any lasting value.
So, first step in designing a SOA Service is to refer to the business process diagrams that your business architect has produced. For each interaction between roles, look for the data needed to make decisions. For example, if you are looking at the process flow for a new purchasing agreement, you may see steps where three different collaborating systems need data. Consider, for each system, what data they have and what data they need to get, from the flow, in order to do their work.
You are collecting data for your service contract. What is the responsibility of the service? OK. Service-oriented architecture. See also the client-server model, a progenitor concept A Service-Oriented Architecture (SOA) is a design pattern in which software/application components provide services to other software/application components via a protocol, typically over a network and in a loosely-coupled way.
The principles of service-orientation are independent of any vendor, product or technology.[1] A service is a self-contained unit of functionality, such as retrieving an online bank statement.[2] By that definition, a service is a discretely invokable operation. However, in the Web Services Definition Language (WSDL), a service is an interface definition that may list several discrete services/operations. And elsewhere, the term service is used for a component that is encapsulated behind an interface. Services can be combined to provide the complete functionality of a large software application.[3] A SOA makes it easier for software components on computers connected over a network to cooperate. Overview[edit] SOA Principles. Listen to the podcasts that accompany this site: Part I - Part II The key to getting the most out of SOA lies within the knowledge of how to create "truly" service-oriented solution logic. That knowledge has been documented as part of the service-orientation design paradigm.
As with object-orientation, service-orientation represents a distinct approach to designing solution logic in support of a very specific set of goals. This site introduces the design principles that comprise the service-orientation design paradigm and further explores various aspects and effects of applying service-orientation in the real world. Becoming proficient with the concepts and principles of service-orientation equips you with an understanding of what is and is not considered "service-oriented" within the world of solution design.
Furthermore, this comprehension provides you with a great deal of clarity when surveying the current SOA marketplace.