Several key features of SOA

Key features of SOA: a coarse-grained, loosely coupled service architecture. Services communicate with each other through simple and precisely defined interfaces, and do not involve underlying programming interfaces and communication models.
1. Access the B2B protocol from outside the enterprise
2 Available at any time
3. coarse-grained service interfaces
4. hierarchical, coarse-grained services are less reusable than fine-grained services, so different levels of granularity should be used to create services.
In terms of service classification, it should be noted that the public service at the service layer is usually composed of the background system (BES's) or the existing local service in the SOA platform. Therefore, it is very important to allow the creation of private services at the service layer.
5 loose coupling
Service interfaces exist as entities that are separated from service implementations. Most loose coupling methods rely on messages based on service interfaces. Message-based interfaces are compatible with multiple transmission modes (such as HTTP, JMS, TCP/IP, and mom ). Message-based interfaces can be implemented using synchronous and asynchronous protocols.
When a customer calls a message-type web service, the customer usually sends a complete document (such as a purchase order) instead of a discrete set of parameters.
6 reusable service and Service Interface Design Management

7. Standardized Interfaces
Web services enable application functions to be provided through the standardized interface (WSDL), and can be called Based on the standardized transmission method (HTTP and JMS) and using the standardized protocol (SOAP.
8 support various message Modes
Stateless messages, stateful messages, and idempotent messages
9. precisely defined service interfaces
In short, SOA can be seen as a natural extension after the B/S model and XML/Web Service technology. SOA will help us understand the development and deployment forms of various components in enterprise-level architecture from a new perspective,
It will help enterprise system architects build the entire business system more quickly, reliably, and reusable. Compared with the past, SOA-based systems can face rapid business changes with greater ease.