Java实现threadLocal线程池获取

<dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>transmittable-thread-local</artifactId>
   <version>2.11.4</version>
</dependency>

private static final TransmittableThreadLocal<User> CURRENT_USER_HOLDER = new TransmittableThreadLocal();

@Bean(value = "defaultThreadPool")
    public Executor buildQueueThreadPool() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        int cpuNum = Runtime.getRuntime().availableProcessors();
        // 设置核心线程数
        executor.setCorePoolSize(Math.min(cpuNum * 2, 16));
        // 设置最大线程数
        executor.setMaxPoolSize(cpuNum * 2);
        //队列中最大的数目
        executor.setQueueCapacity(300);
        //线程名称前缀
        executor.setThreadNamePrefix("defaultThreadPool_");
        //rejection-policy：当pool已经达到max size的时候，如何处理新任务
        //CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行
        //对拒绝task的处理策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //线程空闲后的最大存活时间
        executor.setKeepAliveSeconds(60);
        //加载
        executor.initialize();
        return TtlExecutors.getTtlExecutor(executor);
    }