安排Callables的最佳方法是什么，可能会在投票情况下超时？

I have several Callables which query for some JMX Beans, so each one may time out. I want to poll for values lets say every second. The most naive approach would be to start each in a separate thread, but I want to minimize the number of threads. Which options do I have to do it in a better way?I have several Callables which query for some J