package com.xxx.xxx.xxx;
import java.util.concurrent.ThreadPoolExecutor;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.TaskExecutor;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
/**
 * 類功能說明:服務生產(chǎn)者啟動類
 * <p>
 * <strong></strong>
 * </p>
 *
 * @version
 * @author
 * @since 1.8
 */
@Configuration
@EnableAsync
public class Application extends SpringBootServletInitializer { 
    @Bean
    public TaskExecutor taskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 設置核心線程數(shù)
        executor.setCorePoolSize(5);
        // 設置最大線程數(shù)
        executor.setMaxPoolSize(60);
        // 設置隊列容量
        executor.setQueueCapacity(20);
        // 設置線程活躍時間（秒）
        executor.setKeepAliveSeconds(60);
        // 設置默認線程名稱
        executor.setThreadNamePrefix("what-");
        // 設置拒絕策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 等待所有任務結束后再關閉線程池
        executor.setWaitForTasksToCompleteOnShutdown(true);        
        return executor;
    }    
}

package com.xxx.xxx.service.impl; 
import java.util.concurrent.Future; 
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.AsyncResult;
import org.springframework.stereotype.Service; 
import com.xxx.xxx.service.XXXAsyncService ;
 
@Service
public class XXXAsyncServiceImpl implements XXXAsyncService { 
    @Async
    public Future<Long> rtn1() throws Exception {
        //do something
        //有返回值的時候，可以返回string，long之類的。
        return new AsyncResult<>(1);
    } 
    @Async
    public void rtn2() throws Exception {
        //do something
        //這個可以沒有返回值.
    }
}

package com.xxx.xxx.controller; 
import java.util.concurrent.Future; 
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController; 
import com.xxx.xxx.service.XXXAsyncService;
 
@RestController
@RequestMapping(value="/xxx") 
public class XXXAsyncController { 
 @Autowired
 private XXXAsyncService xxxAsyncService; 
 /**
  * 這里調(diào)用異步方法
  */
    @RequestMapping(value = "/xxx")
 public void dodo() throws Exception {     
  int threads = 10;//十個線程
        List<Future<Long>> list = new ArrayList<>();
        for(int i = 0;i < threads; i++){
         //這里循環(huán)調(diào)用異步方法。
      //如果存在大量數(shù)據(jù)，可以在這里把數(shù)據(jù)切片，然后循環(huán)調(diào)用，分批處理數(shù)據(jù)。效率杠杠的。
   list .add(xxxAsyncService.rtn1());
        }
        long count = 0;
        for(Future<Long> l : tsfCountList) {
         //異步調(diào)用需要返回值的時候，這里可以把返回值都放入到list集合中，然后可以統(tǒng)一處理。 這里的get()是阻塞的，因為需要所以異步方法返回，在繼續(xù)執(zhí)行。
         count += l.get();
        }
        System.out.println("調(diào)用次數(shù)：" + count)；
 }
}

@Configuration
@EnableAsync
public class SpringAsyncConfig { ... }

protected void doExecute(Runnable task) {
    Thread thread = (this.threadFactory != null ? this.threadFactory.newThread(task) : createThread(task));
    thread.start();
}

package com.deppon.ptos.load.config; 
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
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: 異步線程管理
 * @Author:   LYH
 * @CreateDate: 2019/6/27 8:54
 * @Version: 1.0
 * @JDK: 1.8
 */
@Configuration
@EnableAsync
@Slf4j
public class ExecutorConfig {  
    @Value("${async.executor.thread.core_pool_size}")
    private int corePoolSize;
    @Value("${async.executor.thread.max_pool_size}")
    private int maxPoolSize;
    @Value("${async.executor.thread.queue_capacity}")
    private int queueCapacity;
    @Value("${async.executor.thread.name.prefix}")
    private String namePrefix;
 
    @Bean(name = "asyncServiceExecutor")
    public Executor asyncServiceExecutor() {
        log.info("start asyncServiceExecutor");
        ThreadPoolTaskExecutor executor = new VisiableThreadPoolTaskExecutor();
        //配置核心線程數(shù)
        executor.setCorePoolSize(corePoolSize);
        //配置最大線程數(shù)
        executor.setMaxPoolSize(maxPoolSize);
        //配置隊列大小
        executor.setQueueCapacity(queueCapacity);
        //配置線程池中的線程的名稱前綴
        executor.setThreadNamePrefix(namePrefix);
 
        // rejection-policy：當pool已經(jīng)達到max size的時候，如何處理新任務
        // CALLER_RUNS：不在新線程中執(zhí)行任務，而是有調(diào)用者所在的線程來執(zhí)行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //執(zhí)行初始化
        executor.initialize();
        return executor;
    }
}

package com.deppon.ptos.load.config;  
import lombok.extern.slf4j.Slf4j;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Component;
import org.springframework.util.concurrent.ListenableFuture; 
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.concurrent.ThreadPoolExecutor;
 
/**
 * @Description: 打印異步線程的執(zhí)行情況   使用Callbale Future 來返回線程的信息
 * @Author: 633805  LYH
 * @CreateDate: 2019/6/27 8:59
 * @Version: 1.0
 * @JDK: 1.8
 */
@Component
@Slf4j
public class VisiableThreadPoolTaskExecutor extends ThreadPoolTaskExecutor {  
    private void showThreadPoolInfo(String prefix) {
        ThreadPoolExecutor threadPoolExecutor = getThreadPoolExecutor(); 
        if (null == threadPoolExecutor) {
            return;
        }
 
        log.info("{}, {},taskCount [{}], completedTaskCount [{}], activeCount [{}], queueSize [{}]",
                this.getThreadNamePrefix(),
                prefix,
                threadPoolExecutor.getTaskCount(),
                threadPoolExecutor.getCompletedTaskCount(),
                threadPoolExecutor.getActiveCount(),
                threadPoolExecutor.getQueue().size());
    }
 
    @Override
    public void execute(Runnable task) {
        showThreadPoolInfo("1. do execute");
        super.execute(task);
    }
 
    @Override
    public void execute(Runnable task, long startTimeout) {
        showThreadPoolInfo("2. do execute");
        super.execute(task, startTimeout);
    }
 
    @Override
    public Future<?> submit(Runnable task) {
        showThreadPoolInfo("1. do submit");
        return super.submit(task);
    }
 
    @Override
    public <T> Future<T> submit(Callable<T> task) {
        showThreadPoolInfo("2. do submit");
        return super.submit(task);
    }
 
    @Override
    public ListenableFuture<?> submitListenable(Runnable task) {
        showThreadPoolInfo("1. do submitListenable");
        return super.submitListenable(task);
    }
 
    @Override
    public <T> ListenableFuture<T> submitListenable(Callable<T> task) {
        showThreadPoolInfo("2. do submitListenable");
        return super.submitListenable(task);
    }
}

@Async("asyncServiceExecutor")