spring 开启@EnableAsync

@Configuration
//开启异步任务的支持
@EnableAsync
public class TaskExecutorConfig {

    @Bean(name = "businessEventProcessTaskExecutor", destroyMethod = "destroy")
    public ThreadPoolTaskExecutor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 获取JAVA虚拟机的可用处理器数量。IO密集型建议核心线程数是该值2倍；计算密集型建议核心线程数是该值1倍
        int processorNum = Runtime.getRuntime().availableProcessors();
        // 设置核心线程数量。若池中的实际线程数小于该值，无论其中是否有空闲的线程，都会产生新的线程
        executor.setCorePoolSize(processorNum * 2);
        // 设置最大线程数量
        executor.setMaxPoolSize(processorNum * 4);
        // 设置阻塞任务队列大小
        executor.setQueueCapacity(100);
        // 线程名称前缀
        executor.setThreadNamePrefix("ThreadNamePrefix-");
        // 设置线程池中任务的等待时间，若超过等待时间仍未销毁则强制销毁，以确保应用最后能够被关闭，而不是阻塞住
        executor.setAwaitTerminationSeconds(1);
        // 设置拒绝策略，当线程池阻塞队列已满时对新任务的处理。调节机制，即饱和时回退主线程执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }
}