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Spring Boot introduction

Spring Boot is a new framework provided by the Pivotal team, which is designed to simplify the initial building and development process of new Spring applications. The framework is configured in a specific way so that developers no longer need to define a templated configuration. As I understand it, Spring Boot is not really a new framework, it defaults to the use of many frameworks, just as Maven integrates all the Jar packages and Spring Boot integrates all the frameworks.

Characteristics of Spring Boot

1) create a standalone Spring application

2) directly embed Tomcat,Jetty or Undertow without the need to deploy WAR files

3) provide the recommended base POM file (starter) to simplify Apache Maven configuration

4) automatically configure the Spring framework based on project dependencies as much as possible

5) provide functions that can be used directly in a production environment, such as performance metrics, application information, and application health checks

6) right out of the box, no code generation, no need to configure too much xml. You can also modify the default values to meet specific needs.

7) A large number of other projects are based on Spring Boot, such as Spring Cloud.

Asynchronous task

Example:

Write a hello method in service and delay it for three seconds

Servicepublic class AsyncService {public void hello () {try {Thread.sleep (3000);} catch (InterruptedException e) {e.printStackTrace ();} System.out.println ("data is being processed!") ;}}

Let Controller call the service.

@ RestControllerpublic class AsyncController {@ Autowired AsyncService asyncService; @ GetMapping ("/ hello") public String hello () {asyncService.hello (); return "ok";}}

When we start the SpringBoot project, we will find that it will take three seconds to respond to the ok.

So we have to use asynchronous tasks to solve this problem, it is very simple to add an annotation.

Comment @ Async on the hello method

@ Servicepublic class AsyncService {/ / Asynchronous Task @ Async public void hello () {try {Thread.sleep (3000);} catch (InterruptedException e) {e.printStackTrace ();} System.out.println ("data is being processed!") ;}}

Enable asynchronous annotations on the SpringBoot startup class

@ SpringBootApplication// enables asynchronous annotations @ EnableAsyncpublic class Sprintboot09TestApplication {public static void main (String [] args) {SpringApplication.run (Sprintboot09TestApplication.class, args);}}

When the problem is solved, the server will respond to the front-end data instantly!

The more the tree yearns for the light above, the more its roots go down, to the soil, to the depths of darkness.

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