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This article introduces the relevant knowledge of "what are the problems related to Spring Cloud microservices?". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

01. What is a microservice?

The core of micro-service is to split the traditional one-stop application into one service according to the business, and completely remove the coupling. Each micro-service provides a single business function, and a service only does one thing.

From a technical point of view, it is a small and independent process, similar to the concept of a process, which can be started or destroyed independently, and can have its own independent database.

The paper mentions the difference between micro-services and traditional architecture, traditional architecture (stand-alone system), a project by project: such as goods, orders, transactions, inventory, etc., unified deployment, a process. As shown in the following picture (the picture is from the original text):

Micro-service architecture (distributed system), each module / service, independent, "let professional people do professional things", deployed independently. In a distributed system, different services can use separate databases. As shown in the following picture (the picture is from the original text):

02. Advantages and disadvantages of microservices

Advantages of micro-service:

1. Each service is sufficiently cohesive, small enough to make the code easy to understand. This focuses on a business function or business requirement that is appropriate only.

two。 Development is simple and efficient, a service may be professional to do only one thing, micro-services can be developed separately by a small team, which can be composed of 2 to 5 developers.

3. Microservices are loosely coupled and functionally meaningful, and are independent in either the development phase or the deployment phase.

4. Microservices can be developed in different languages.

5. Easy to integrate with third parties, micro services run easily and flexibly integrate automatic deployment through continuous integration tools such as Jenkins,Hudson,bamboo.

6. Microservices are easy to understand, modify, and maintain by a developer, so that small teams can pay more attention to their work and realize their value without collaboration.

7. Microservices allow you to take advantage of the latest technologies. Microservices are just code for business logic and will not be mixed with HTML/CSS or other interface components, that is, front and back ends are separated.

8. Each microservice has its own storage capacity, can have its own database, can also have a unified database.

The disadvantage of microservices: developers have to deal with the complexity of distributed systems.

03. What are the technology stacks of microservices?

First of all, micro-services are inseparable from service development, service configuration and management, service registration and discovery, service invocation, fuses and load balancing, etc., in addition, there are service routing, monitoring, deployment, and may involve some middleware and so on.

These technology stacks have some corresponding implementation of landing technology. For more information, please take a look at the following picture (the picture can be opened to the public):

04. Why choose SpringCloud?

The current micro-service architecture, Dubbo and SpringCloud are relatively popular, as well as Thrift, gRPC and so on. We can see the power of SpringCloud by comparing these below. As the picture is relatively long, I divided it into two pictures.

In the process of implementing and implementing the micro services architecture, we usually carry out technology selection. Many people will compare Dubbo and Spring Cloud of Ali open source. In fact, they are comparing REST and RPC. In fact, Dubbo and Spring Cloud are not in the same field and are not comparable.

Spring Cloud is a complete microservice solution that, as shown in the table above, provides a collection of solutions in distributed situations. Dubbo is a high-performance Java RPC framework. With the development of technology, Spring Cloud ecology and Dubbo ecology will gradually integrate and complement each other.

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