NodeBrain是用于状态和事件监视应用的规则引擎。通过用户指定的事件关联规则，它与其他监控组件来共同完成简单的元素状态与复杂的关联事件的检测。-NodeBrain is a rule engine for construction of state and event monitoring applications. It interacts with other monitoring components to perform simple element state monitoring