springboot学习01

spring-boot-demo-actuator

本 demo 主要演示了如何在 Spring Boot 中通过 actuator 检查项目运行情况

SpringBootDemoActuatorApplication.java

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * 

 * 启动类
 * 
 *
 * @description: 启动类
 */
@SpringBootApplication
public class SpringBootDemoActuatorApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringBootDemoActuatorApplication.class, args);
	}
}

application.yml

server:
  port: 8080
  servlet:
    context-path: /demo
# 若要访问端点信息，需要配置用户名和密码
spring:
  security:
    user:
      name:#####
      password: 123456
management:
  # 端点信息接口使用的端口，为了和主系统接口使用的端口进行分离
  server:
    port: 8090
    servlet:
      context-path: /sys
  # 端点健康情况，默认值"never"，设置为"always"可以显示硬盘使用情况和线程情况
  endpoint:
    health:
      show-details: always
  # 设置端点暴露的哪些内容，默认["health","info"]，设置"*"代表暴露所有可访问的端点
  endpoints:
    web:
      exposure:
        include: '*'

spring-boot-demo-admin-client

本 demo 主要演示了普通项目如何集成 Spring Boot Admin，并把自己的运行状态交给 Spring Boot Admin 进行展现。

SpringBootDemoAdminClientApplication.java

/**
 * 

 * 启动类
 * 
 *
 * @description: 启动类
 */
@SpringBootApplication
public class SpringBootDemoAdminClientApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringBootDemoAdminClientApplication.class, args);
	}
}

IndexController.java

@RestController
public class IndexController {
	@GetMapping(value = {"", "/"})
	public String index() {
		return "This is a Spring Boot Admin Client.";
	}
}

application.java

server:
  port: 8080
  servlet:
    context-path: /demo
spring:
  application:
    # Spring Boot Admin展示的客户端项目名，不设置，会使用自动生成的随机id
    name: spring-boot-demo-admin-client
  boot:
    admin:
      client:
        # Spring Boot Admin 服务端地址
        url: "http://localhost:8000/admin"
        instance:
          metadata:
            # 客户端端点信息的安全认证信息
            user.name: ${spring.security.user.name}
            user.password: ${spring.security.user.password}
  security:
    user:
      name: ######
      password: 123456
management:
  endpoint:
    health:
      # 端点健康情况，默认值"never"，设置为"always"可以显示硬盘使用情况和线程情况
      show-details: always
  endpoints:
    web:
      exposure:
        # 设置端点暴露的哪些内容，默认["health","info"]，设置"*"代表暴露所有可访问的端点
        include: "*"

spring-boot-demo-admin-server

本 demo 主要演示了如何搭建一个 Spring Boot Admin 的服务端项目，可视化展示自己客户端项目的运行状态。

SpringBootDemoAdminServerApplication.java

@EnableAdminServer
@SpringBootApplication
public class SpringBootDemoAdminServerApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringBootDemoAdminServerApplication.class, args);
	}
}

application.java

server:
  port: 8000
spring:
  boot:
    admin:
      # 管控台上下文路径
      context-path: /admin

spring-boot-demo-async

此 demo 主要演示了 Spring Boot 如何使用原生提供的异步任务支持，实现异步执行任务。

SpringBootDemoAsyncApplication.java

@EnableAsync
@SpringBootApplication
public class SpringBootDemoAsyncApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootDemoAsyncApplication.class, args);
    }

}

TaskFactory.java

/**
 * 

 * 任务工厂
 * 
 *
 * @description: 任务工厂
 */
@Component
@Slf4j
public class TaskFactory {

    /**
     * 模拟5秒的异步任务
     */
    @Async
    public Future asyncTask1() throws InterruptedException {
        doTask("asyncTask1", 5);
        return new AsyncResult<>(Boolean.TRUE);
    }

    /**
     * 模拟2秒的异步任务
     */
    @Async
    public Future asyncTask2() throws InterruptedException {
        doTask("asyncTask2", 2);
        return new AsyncResult<>(Boolean.TRUE);
    }

    /**
     * 模拟3秒的异步任务
     */
    @Async
    public Future asyncTask3() throws InterruptedException {
        doTask("asyncTask3", 3);
        return new AsyncResult<>(Boolean.TRUE);
    }

    /**
     * 模拟5秒的同步任务
     */
    public void task1() throws InterruptedException {
        doTask("task1", 5);
    }

    /**
     * 模拟2秒的同步任务
     */
    public void task2() throws InterruptedException {
        doTask("task2", 2);
    }

    /**
     * 模拟3秒的同步任务
     */
    public void task3() throws InterruptedException {
        doTask("task3", 3);
    }

    private void doTask(String taskName, Integer time) throws InterruptedException {
        log.info("{}开始执行，当前线程名称【{}】", taskName, Thread.currentThread().getName());
        TimeUnit.SECONDS.sleep(time);
        log.info("{}执行成功，当前线程名称【{}】", taskName, Thread.currentThread().getName());
    }
}

application.java

spring:
  task:
    execution:
      pool:
        # 最大线程数
        max-size: 16
        # 核心线程数
        core-size: 16
        # 存活时间
        keep-alive: 10s
        # 队列大小
        queue-capacity: 100
        # 是否允许核心线程超时
        allow-core-thread-timeout: true
      # 线程名称前缀
      thread-name-prefix: async-task-