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@Configuration
public class ScheduledThreadPoolConfig implements SchedulingConfigurer {

	@Override
	public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
		 taskRegistrar.setScheduler(taskExecutor());
	}
	
	@Bean(name="taskExecutor",destroyMethod="shutdown")
    public Executor taskExecutor() {
		return Executors.newScheduledThreadPool(20);
    }
	
}