The technical principles of the reactive HTTP framework in the Java class library

The reactive HTTP framework in the Java class library is a framework based on reaction programming concepts that can be used to build a fast, scalable, high -performance HTTP application.This article will describe the technical principles of the reaction HTTP framework, and explain the complete programming code and related configuration when needed. 1. Reaction programming concept Reacting programming is a programming paradigm facing data flow and changing communication. Its main goal is to build an asynchronous, non -blocking, scaling application.In the traditional command programming, the program is executed in the order of definition, and a statement can be executed to perform the next statement.In reaction programming, the program is driven by the event flow, the data flow is passed between the components, and the dependent relationship is maintained through the observer mode.This design mode makes applications more response and elastic. Second, the technical principle of the reaction HTTP framework 1. Non -blocking IO The reaction HTTP framework uses non -blocking IO to process requests and responses.The traditional blocking IO model creates a thread to deal with each request when it arrives. In the case of high concurrency, thread resources will be excessively consumed, resulting in a decline in performance.The reactive HTTP framework uses a non -blocking IO model, so that a thread can process multiple requests at the same time and improve the system's concurrent ability and performance. 2. Response programming The reactive HTTP framework processs the request and response data through responsive programming.The data stream is processed through the flow inside the frame, and the data is passed to the relevant components by the observer mode.This can effectively process a large amount of requests and response data, and make the program more flexible and response. 3. Asynchronous treatment The reaction HTTP framework uses asynchronous processing models to process requests and responses.When the request arrives, the framework will put the request into the asynchronous thread pool for processing instead of blocking the request to complete.This method can make full use of system resources, while improving the system's concurrent ability and response speed. 4. Advanced route function The reaction HTTP framework provides a high -level routing function. You can ask the request routing to the corresponding processing function or method according to the request URL, HTTP method, request header and other information.This flexible routing mechanism allows developers to more conveniently define and manage various requests. 3. Programming examples and related configurations Take Spring Webflux as an example to show the programming example and related configuration of the reaction HTTP framework. 1. Programming code example: @Controller public class UserController { @Autowired private UserService userService; @GetMapping("/users/{id}") public Mono<User> getUserById(@PathVariable String id) { return userService.getUserById(id); } @PostMapping("/users") public Mono<User> createUser(@RequestBody User user) { return userService.createUser(user); } } 2. Configuration Example (Application.properties): server.port=8080 Through the above code example, we can see the basic programming mode of using the reaction HTTP framework in Spring Webflux.Through `@controller` annotations, a class declaration is declared as a controller, and related annotations (such as`@getmapping`,@postmapping`) are used to ask the routing method to the corresponding processing method.In the processing method, you can return the response object of the `Mono` or` FLUX` type, which is a unique data type in the reaction HTTP framework. Through the `Server.Port` attribute in the configuration file, the port number of the application monitor can be specified. The above is a review about the technical principle of the reaction HTTP framework in the Java library, as well as the related programming code and configuration description.I hope this article will help you understand and apply the reactive HTTP framework.