Shulou(Shulou.com)06/01 Report--

In this issue, the editor will bring you how to understand the service-oriented architecture SOA. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

Service-oriented architecture, Service-OrientedArchitecture (SOA) is a component model that splits different functional units of an application (called services) and connects them through well-defined interfaces and protocols between these services. Interfaces are defined in a neutral manner and should be independent of the hardware platform, operating system, and programming language that implements the service. This enables the services of components in a variety of systems to interact in a unified and universal way.

1 introduction to the definition

Service-oriented architecture, which can distribute, combine and use loosely coupled coarse-grained application components through the network according to the requirements. The service layer is the foundation of SOA, which can be directly called by the application, so as to effectively control the human dependence of the interaction with the software agent in the system.

SOA is a coarse-grained, loosely coupled service architecture, which communicates between services through a simple and precisely defined interface, without involving the underlying programming interface and communication model. SOA can be seen as a natural extension of the Bamp S model, XML (a subset of the standard general markup language) / Web Service technology.

SOA will help software engineers stand at a new height to understand the development and deployment of various components in the enterprise architecture, and it will help enterprise system architects to structure the entire business system with faster, more reliable and more reusable. Compared with the past, the system based on SOA architecture can face the rapid changes of business more calmly.

SOA system is a universal architecture for enterprises.

2 basic characteristics

The implementation of SOA has several distinct basic characteristics. The key goal of implementing SOA is to maximize the IT assets of enterprises. To achieve this goal, you should keep the following characteristics in mind during the implementation of SOA:

Accessible from outside the enterpri

Available at any time

Coarse-grained service interface classification

Loose coupling

Reusable servic

Service interface design management

Standardized service interface

Support a variety of message modes

Precisely defined service contract

3 main advantages

First, SOA can be released through the Internet server, so as to break through the limitations of the enterprise intranet and achieve close integration with the upstream and downstream partners of the supply chain. Through the SOA architecture, enterprises can directly establish new channels with their business partners, and the cost of establishing new partners can be reduced.

Second, SOA has nothing to do with the platform and reduces the restrictions on the implementation of business applications. In order to integrate the enterprise's business partners into the enterprise's "large" business system, there are no restrictions on what specific technologies their business partners use.

Third, SOA has the characteristics of low coupling, and the impact of business partners on the whole business system is low. In the case of continuous changes in the relationship between enterprises and business partners, the cost savings will be more and more.

Fourth, SOA has the advantage that it can be implemented in stages by module. We can successfully take one step and then do the next step to minimize the impact of implementation on the enterprise.

Fifth, the implementation of SOA may not have cost significance. This needs to be discussed in three situations:

(1) when an enterprise builds a business system from scratch, the cost of using SOA architecture is the same as that of not using SOA architecture.

(2) when the enterprise business development or enterprise restructuring and other changes, the original system can not meet the needs, and the need to restructure the business system, the cost of using SOA architecture and not using SOA architecture can be regarded as the same.

(3) when the enterprise business changes slowly and foresees the need to restructure the business system in the future, because the SOA can be implemented step by step according to the module to meet the needs of the change, so that the enterprise does not need to invest a large amount of money to transform the system, but gradually invest according to the enterprise business development and capital situation, thus alleviating the pressure of information investment.

The concept of SOA is nothing new. SOA differs from existing distributed technologies in that most software vendors accept it and have platforms or applications that can implement SOA. Along with the ubiquitous standards, SOA brings better reuse to the existing assets or investments of enterprises. SOA can create applications on top of the latest and existing applications; SOA can protect customers or service consumers from changes in service implementation; SOA can upgrade individual services or service consumers without rewriting the entire application, and there is no need to retain existing systems that are no longer suitable for new needs.

In summary, SOA provides enterprises with more flexibility to build applications and business processes in an agile way that combines existing applications to generate new services.

This is how the service-oriented architecture SOA shared by the editor is understood. If you happen to have similar doubts, you might as well refer to the above analysis. If you want to know more about it, you are welcome to follow the industry information channel.

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