Decentralized spring cloud

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3. The core capabilities of springcloud are as follows:

- service registration and service discovery
- service routing
- end-to-end service invocation
- load balancing
- fuse
- distributed transaction
- distributed message
- distributed configuration center
- Link Tracking


springcloud has established its leading position in the field of micro services, It covers almost all the components we need

if you want to master the current popular microservice technology stack and keep up with the technological pace of the times, you can watch free videos in the video library of the official website of black horse programmers.

4. Spring cloud is an ordered collection of a series of microservice frameworks, while Dubbo has two common understandings, one in a narrow sense and the other in a broad sense. The narrow sense of Dubbo refers to a high-performance RPC framework, while the broad sense of Dubbo is worth a set of microservice solutions! If you want to master the current popular microservice technology stack and keep up with the technological pace of the times, go to the video library of the official website of black horse programmer to watch free video. I'm glad my answer can help you

5. Springcloud is an ordered collection of microservice tools, which includes:
(1) registration center
(2) client load balancing
(3) fuse
(4) API service gateway
(5) distributed configuration center
springcloud is a relatively complex set of technical architecture, which I learned by viewing recorded videos on the official website of Chuan podcast, You can also go and have a look. The lecturer is humorous and easy to understand.

6. 1、 What is spring cloud
I believe when you see the word cloud, the first thing you think of is "cloud" or "cloud computing". In fact, this is not the meaning here. Spring cloud is a tool set based on spring boot to quickly build distributed systems. It integrates a variety of tools to facilitate our development. Because it is built on the basis of spring boot, spring cloud has the characteristics of spring boot< Second, the version characteristics of spring cloud
the figure below is a picture I cut from the official website of spring cloud. Most of the spring software versions are in the form of major version, minor version, incremental version, development or release version. For example, the version in red on the left side of the figure below is 1.4.4.release. 1 represents the major version, the first 4 represents the minor version, the second 4 represents the modified version, and release represents the released version
the version of spring cloud is in the form of "angel sr6". We can regard angel as a large version of spring cloud, and sr6 is a service release version (bug repair version)

7. In the development, we often use httpclient to remotely call the interfaces of other systems. Generally, we need to specify the URL to call. Feign also implements a set of remote calling methods, which is more elegant
1. Add dependency

& lt; dependency>< br /> < groupId> org.springframework.cloud</ groupId>< br /> < artifactId> spring-cloud-starter-feign</ artifactId>< br /></ dependency>
2. Create feignclient interface (used to specify the service to be called remotely)

/ / declare that this is a feign client, and specify the service ID
@ feignclient (value = & quot; com-spring-caclulate")
public interface caclufeignclient {

/ / here, a method similar to spring MVC usage is defined to make restful calls
@ requestmapping (value = & quot/ caclu/{num}", method = RequestMethod.GET)
public Item caclulate(@PathVariable(" num") Integer num);

}
note: here is an interface
3. Inject the interface into the method that needs to be called remotely, and call the corresponding API interface method

@ Autowired
private caclufeignclient caclufeignclient< br />
@GetMapping(value = " query/result")< br />public Integer caclulate() {
cacluFeignClient.caclulate(1);
}
4. Add the annotation @ enablefeignclients to the startup class, which means that the format of feign

feignclient interface and spring MVC interface are consistent. In the method of the caller, we only need to call the interface defined in the system.

8. Spring cloud is an ordered collection of a series of microservice frameworks, while Dubbo has two common understandings, one in a narrow sense and the other in a broad sense. The narrow sense of Dubbo refers to a high-performance RPC framework, while the broad sense of Dubbo is worth a set of microservice solutions

in short, Dubbo is indeed similar to a subset of spring cloud. Dubbo has perfect functions and documents, and has many mature users in China

Dubbo has the functions of scheling, discovery, monitoring, and governance, and * * supports quite rich service governance capabilities * *. Under the Dubbo architecture, the registration center is a peer-to-peer cluster, and it will cache the service list. When the database fails, it will continue to provide the discovery function. Its own service discovery structure has strong * * availability and robustness * *, which is enough to support high traffic websites

spring cloud is composed of many subprojects, including spring cloud Netflix, spring cloud config, spring cloud consult, spring cloud Alibaba, and Dubbo. Spring cloud provides common tools for building distributed systems and microservices, such as configuration management, service discovery, circuit breaker, intelligent routing, micro agent, control bus, one-time token, global lock, host selection, distributed session and cluster state, which meet all the solutions needed for building microservices

if you want to master the current popular microservice technology stack and keep up with the technological pace of the times, the official website of dark horse programmer tutorial video resources is free of charge, just go to learn it.

9. Have you found the answer? I also report this error! I know what's wrong, because spring boot and spring cloud don't match
finchley.sr2 matches spring boot version 2.0.3

10. If you want to teach yourself Java, you can download the video directly from their official website for free
self learning java needs to persist. It's not difficult to learn, but the boring learning process. come on.