Provided is a method for event processing and a system for using the same. The system for event processing in a computer may include an interface to detect an input associated with an event, an event definition engine which defines the event using a plurality of event components and a corresponding event component wrapper wrapping each of the plurality of event components, an event processing engine which processes the event, and an event action module to generate an output based on the event. The event definition engine may determine a hierarchical relationship between the plurality of event components and assigns the hierarchical relationship in the corresponding event component wrapper. Moreover, the event processing engine may execute each of the event components according to the hierarchical relationship assigned in the event component wrapper.