The power node video tutorial is new! In response to the needs of the majority of students, Momentum has launched a new course-Spring Cloud Alibaba, to deeply analyze Alibaba's core microservice technology.
Spring Cloud Alibaba is a sub-project under Spring Cloud. Spring Cloud Alibaba provides a one-stop solution for distributed application development. It contains all the components needed to develop distributed applications. With Spring Cloud Alibaba, you only need Add some annotations and a small amount of configuration to connect the Spring Cloud application to Alibaba's distributed solution, and use Alibaba middleware to build a distributed application system. First of all, Spring Cloud Alibaba is a project. According to the introduction of the document, the purpose of this project is to provide a one-stop solution for microservice development. In order to let everyone know the Spring framework, its excellent design patterns and abstract concepts, in order to use Ali Java developers of Baba products bring more convenience in using Spring Boot and Spring Cloud. So let's first understand what a microservice is.
Microservices actually split the service into more fine-grained service modules. Each module is responsible for completing relatively independent tasks and is an independent application. Some microservices expose API interfaces that are provided to other microservices or clients to call. The remote calling application client generally does not directly access the service, but through the API gateway (Gatewawy).
The benefits of microservices:
Split complex architecture, simplify and reduce coupling.
Each service module can be developed independently and provided with external interfaces.
Each microservice can be deployed independently.
Each microservice can be independently scaled horizontally.
Disadvantages of microservices:
It belongs to a distributed system, and the communication between services is more complicated than a single application. The
partitioned database architecture and the consistency of transactions are relatively complicated
. The test of a function requires multiple services to coordinate the joint test.
Multiple services need to be configured, deployed, expanded, and monitored, considering service discovery Mechanism etc.
Although there is an increase in complexity, microservices are a good choice from the perspective of application sustainability and scalability.
Let's talk about distributed applications and services. The completion of a task requires deployment and often requires multiple applications on different machines to be coordinated through network calls. Of course, the distributed architecture also has various advantages similar to the microservices mentioned above. After all, the microservice architecture is also an evolution result of the distributed architecture. Although microservices and distributed architecture have brought many monolithic applications without benefits, it also means that there are more things to consider when building, such as:
inter-service communication,
load balancing,
fault handling,
transactions,
message queues
, etc.
Spring Cloud Alibaba claims to provide a one-stop solution, so this series will take a look at how it is solved. Let's first briefly introduce the main functions that Spring Cloud Alibaba contains. It is simple to have a concept and impression, and then go to in-depth understanding:
1. Service current limit and downgrade: support WebServlet, WebFlux, OpenFeign, RestTemplate, Dubbo access current limit and Downgrade, you can modify the current limiting downgrade strategy in real time through the console, and support monitoring the current limiting downgrade indicators
2. Service registration and discovery: services can be registered, clients can discover instances through Spring managed beans, and integrate Ribbon
3. Distributed configuration: support Distributed system configuration extension, automatically refreshed when configuration changes
4. Rpc service: Extension of Spring Cloud’s RestTemplate and OpenFeign to support calling Dubbo RPC services
5. Event-driven: support for building highly scalable event-driven micros connected through a shared message system Service
6. Distributed transaction: support for high-performance, easy-to-use distributed transaction solutions.
7. Alibaba Cloud Object Storage, Alibaba Cloud Task Scheduling, and Alibaba Cloud Short Message Service have
all introduced the content of the course. After the above simple introduction, you can I found that Spring Cloud Alibaba is very powerful. Does this technology impress you? Your heart is better than action, come to the Spring Cloud Alibaba tutorial of Power Node to learn this new and powerful Alibaba core microservice technology!