一、定义线程池

将创建好的线程池对象放入 taskExecutor 对象中

package com.wells.demo.customer.pool;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;
/**
 * Description 
 * Created by wells on 2020-07-15 21:18:04
 */
@EnableAsync
@Configuration
public class ThreadPoolConfig {
    @Bean(value = "taskExecutor")
    public Executor createThreadPoolExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(10);
        executor.setMaxPoolSize(20);
        executor.setQueueCapacity(200);
        executor.setKeepAliveSeconds(60);
        executor.setThreadNamePrefix("taskExecutor-");
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        return executor;
    }
}

二、定义CustomerAsyncController: 调用入口

package com.wells.demo.customer.controller;
import com.wells.demo.customer.service.CustomerAsyncService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
 * Description 异步调用Service
 * Created by wells on 2020-07-15 09:26:38
 */
@RestController
@RequestMapping(value = "customer/async")
public class CustomerAsyncController {
    Logger logger = LoggerFactory.getLogger(CustomerAsyncController.class);
    @Autowired
    private CustomerAsyncService customerAsyncService;
    @GetMapping(value = "/execute/task")
    public String executeTask() throws InterruptedException {
        logger.info("customer async request start");
        long start = System.currentTimeMillis();
        customerAsyncService.executeTaskOne();
        customerAsyncService.executeTaskTwo();
        long end = System.currentTimeMillis();
        logger.info("customer async request end, cost:{}", (end - start));
        return "success";
    }
}

三、定义Service

package com.wells.demo.customer.service;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import java.util.concurrent.TimeUnit;
/**
 * Description 
 * Created by wells on 2020-07-15 09:36:29
 */
@Service
public class CustomerAsyncService {
    Logger logger = LoggerFactory.getLogger(CustomerAsyncService.class);
    @Async(value = "taskExecutor")
    public void executeTaskOne() throws InterruptedException {
        logger.info("executeTaskOne request start");
        TimeUnit.SECONDS.sleep(10);
        logger.info("executeTaskOne request end");
    }
    @Async(value = "taskExecutor")
    public void executeTaskTwo() throws InterruptedException {
        logger.info("executeTaskTwo request start");
        TimeUnit.SECONDS.sleep(10);
        logger.info("executeTaskTwo request end");
    }
}

通过 Controller 提供的 url测试，观察日志

四、优雅关闭线程池

setAwaitTerminationSeconds

package com.wells.demo.customer.pool;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;
/**
 * Description 
 * Created by wells on 2020-07-15 21:18:04
 */
@EnableAsync
@Configuration
public class ThreadPoolConfig {
    @Bean(value = "taskExecutor")
    public Executor createThreadPoolExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(10);
        executor.setMaxPoolSize(20);
        executor.setQueueCapacity(200);
        executor.setKeepAliveSeconds(60);
        executor.setThreadNamePrefix("taskExecutor-");
        // 设置线程池关闭时间
        executor.setAwaitTerminationSeconds(60);
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        return executor;
    }
}

五、代码示例

SpringBoot Async Customer ThreadPool