import net.floodlightcontroller.debugevent.DebugEventService.EventCategoryBuilder; //导入依赖的package包/类
private void registerDeviceManagerDebugEvents() throws FloodlightModuleException {
	if (debugEventService == null) {
		logger.error("debugEventService should not be null");
	}
	EventCategoryBuilder<DeviceEvent> ecb = debugEventService.buildEvent(DeviceEvent.class);
	debugEventCategory = ecb.setModuleName(PACKAGE)
			.setEventName("hostevent")
			.setEventDescription("Host added, removed, updated, or moved")
			.setEventType(EventType.ALWAYS_LOG)
			.setBufferCapacity(500)
			.setAckable(false)
			.register();
}
 

import net.floodlightcontroller.debugevent.DebugEventService.EventCategoryBuilder; //导入依赖的package包/类
@Override
public <T> EventCategoryBuilder<T> buildEvent(Class<T> evClass) {
    DebugEventService des = new DebugEventService();
    return des.buildEvent(evClass);
}
 

import net.floodlightcontroller.debugevent.DebugEventService.EventCategoryBuilder; //导入依赖的package包/类
/**
 * Returns an {@link EventCategoryBuilder} that can be used to build a new
 * {@link EventCategory}. Before calling the {@literal build} method, set
 * the following parameters:
 *
 * @param moduleName
 *            module registering event eg. linkdiscovery, virtualrouting.
 * @param eventName
 *            name given to event.
 * @param eventDescription
 *            A descriptive string describing the event.
 * @param eventType
 *            EventType for this event. On-demand events have to be
 *            explicitly enabled using other methods in this API
 * @param eventClass
 *            A user defined class that annotates the fields with
 *            @EventColumn. This class specifies the fields/columns for this
 *            event.
 * @param bufferCapacity
 *            Number of events to store for this event in a circular buffer.
 *            Older events will be discarded once the buffer is full.
 * @param ackable
 *            is the event used as part of ackable-event framework boolean
 *
 * @return IEventCategory with <b>newEvent</b> method that can be used
 * to create instances of event of the given eventClass
 * @throws MaxEventsRegistered
 */
public <T> EventCategoryBuilder<T> buildEvent(Class<T> evClass);