Basic characteristics of service-oriented architecture

The goal of SOA is to make IT systems more flexible, so as to respond to the changing business needs of enterprises more flexibly and quickly, and to solve the problem of "how to reuse software functions" that has always existed in the software field. Using SOA to build an information platform is undoubtedly the future development direction.

The five basic characteristics of SOA provide a solution for software function reuse.

① Services communicate through a simple and precisely defined interface, which does not involve the underlying programming interface and communication model.

② Coarse-grained: coarse-grained services provide specific business functions. The advantage of using coarse-grained service interface is that there is no need to go back and forth between users and service layers many times, and one round trip is enough.

③ Loose coupling: Loose coupling requires that different services in SOA architecture should maintain a loose coupling relationship, that is, they should maintain a relatively independent relationship. This has two advantages. First of all, it is flexible. Secondly, the system can continue to exist independently when the internal structure and implementation of the services that make up the whole application change gradually. Tight coupling means that the interfaces between different components of the application are closely connected with their functions and structures, so this structure is very fragile when some form of changes are needed to some or all of the application.

④ Location transparency: Location transparency requires that all services in the SOA system are location transparent to their callers, that is, the caller of each service only needs to know which service he wants to call, and does not need to know the physical location of the called service.

⑤ Protocol independence: Protocol independence requires that each service can be called through different protocols.

In addition, in many traditional IT systems, hard connections are used, which makes it difficult for enterprises to respond quickly to market changes. SOA can reuse the existing resources of enterprises, reduce the operating costs of enterprises, improve the efficiency of resource use, reduce the workload of enterprise maintenance personnel, and reduce potential risks and management costs. Bring many advantages in business and IT fields:

① Services bring flexibility to accurate business processes;

② Use services to improve customer service, without worrying about the underlying complex IT infrastructure;

③ Ability to quickly create new business processes and complex applications to adapt to market changes;

④ Become a more responsive IT organization with the help of a safe and manageable integrated environment;

⑤ Using pre-installed and reusable service building modules to shorten the development and deployment cycle;

⑥ Use services to reduce complexity and maintenance costs;

⑦ IT is to enhance rather than replace the existing IT system.