@Bean
    public TaskExecutor taskExecutor() {
        ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
        taskExecutor.setCorePoolSize(10);
        taskExecutor.setMaxPoolSize(50);
        taskExecutor.setQueueCapacity(10);
        taskExecutor.setThreadNamePrefix("default-thread-pool-");
        taskExecutor.initialize();
        return taskExecutor;
    }