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This article mainly introduces "how to achieve Session sharing in Spring Boot". In daily operation, I believe many people have doubts about how to achieve Session sharing in Spring Boot. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to achieve Session sharing in Spring Boot". Next, please follow the editor to study!

Origin

In the traditional single-service architecture, generally speaking, if there is only one server, there is no Session sharing problem, but in distributed / cluster projects, Session sharing is a problem that must be faced. First, take a look at a simple architecture diagram:

In such an architecture, there will be some problems that do not exist in a single service, such as the client initiates a request. After the request arrives on Nginx, it is forwarded to Tomcat A by Nginx, and then a data is saved in session on Tomcat A. next time, the request is forwarded to Tomcat B, and then go to Session to get the data and find that there is no previous data. To solve this kind of problem, the idea is very simple, which is to save the data that needs to be shared among various services to a common place (the mainstream solution is Redis):

When all Tomcat needs to write data to Session, it writes to Redis, and when all Tomcat needs to read data, it reads from Redis. In this way, different services can use the same Session data.

Such a solution can be manually implemented by developers, that is, manually storing data in Redis and manually reading data from Redis, which is equivalent to using some Redis client tools to achieve such a function. There is no doubt that manual implementation is still a lot of work.

A simplified solution is to use Spring Session to achieve this function. Spring Session uses the proxy filter in Spring to intercept all Session operations, automatically synchronize data to Redis, or automatically read data from Redis.

For developers, all Session synchronization operations are transparent, developers use Spring Session, once configured, the specific usage is the same as using a normal Session.

At this point, the study on "how to achieve Session sharing in Spring Boot" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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