AUTOSAR from getting started to mastering 100 lectures (150) -soa architecture and Application

01
Definition
 

Service Oriented Architecture , It can deploy the loosely coupled coarse-grained application components through the network according to the requirements 、 Combination and use . The service layer is SOA The basis of , It can be called directly by the application , So as to effectively control the human dependence of interaction with software agent in the system .
 

SOA It's a coarse grain 、 Loosely coupled Service Architecture , Between services through simple 、 Precisely define the interface for communication , It doesn't involve the underlying programming interface and communication model .SOA It can be seen as B/S Model 、XML（ A subset of Standard General Markup Languages ）/Web Service The natural extension of technology .
 

SOA It will help software engineers understand the development of various components in the enterprise architecture from a new height 、 Deployment form , It's going to help enterprise system architects with faster 、 More reliable 、 More reusable architecture of the entire business system . More than ever , With SOA The architecture of the system can more calmly face the rapid changes in business .
 

SOA The system is an enterprise universal architecture .
 

02
Architecture
 

2.1 Loosely coupled systems
 

This has a neutral interface definition （ There is no mandatory binding to a specific implementation ） Is called loose coupling between services . There are two advantages to loosely coupled systems , One is its flexibility , Another point is that , As the internal structure and implementation of each service that makes up the entire application gradually changes , It can continue to exist . By contrast , Tight coupling means that the interfaces between different components of an application are closely related to their functions and structures , So when you need to make some form of change to part or the entire application , They're very vulnerable .
 

The need for loosely coupled systems stems from the need for business applications to become more flexible according to business needs , To adapt to the changing environment &