AUTOSAR from getting started to mastering 100 lectures (106) - SOA in domain controllers

01 Atomic service

Speaking of service architecture , The topic of atomic services is very hot , that , What is atomic service ？ What are the characteristics of atomic Services ？ How to split business services and define atomic services at the system level ？ What impact does atomic services have on our software ？ What is his relationship with service ？

Let's start with the smallest unit of service —— Atomic Services . Atomic services are defined as ： A series of operations with the smallest granularity in business . Atomic services are characterized by loose coupling , Relatively independent , And it will not affect other atomic services within the foreseeable range . Each item has its own business scope ; They don't have to care about how their non business scope is realized , For invoking other atomic Services , You only need to consider how to handle the call scenario and the returned results .

For example , First look at the following three sentences ：

• Cash deposits It is the financial account Cash transactions Charging service behavior of .

• Credit card payment It happened in the financial account , UnionPay may be involved 、 Credit card Cash transactions .

• Cash transfer It is the charging service behavior of cash transactions between financial accounts and counterparty financial accounts .

Of these three sentences , Cash deposits 、 Credit card repayment and cash transfer are services , Cash transactions are atomic Services , And financial accounts 、 UnionPay card and credit card are the business participants of the service , It is also a well-known service consumer and provider .

Through this example , You should have a basic concept of atomic Services . that , Services are made up of atomic Services ,SOA Is it simply composed of services ？